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  • "From Wikipedia, the free encyclopedia

    For other uses, see Michael Jackson (disambiguation).
    "King of Pop" redirects here. For other uses, see King of Pop (disambiguation).
    Michael Jackson
     Jackson in 1988
    Born
    Michael Joseph Jackson

    August 29, 1958
    Gary, Indiana, US
    Died
    June 25, 2009 (aged 50)
    Los Angeles, California, US
    Cause of death
    Acute propofol intoxication
    Burial place
    Forest Lawn Memorial Park, Glendale, California, US
    Other names
    Michael Joe Jackson
    Occupations
    Singer
    songwriter
    dancer
    record producer
    Spouses
    Lisa Marie Presley


    (m. 1994; div. 1996)​
    Debbie Rowe


    (m. 1996; div. 2000)​
    Children
    3, including Paris
    Parents
    Joe Jackson
    Katherine Jackson
    Family
    Jackson family
    Awards
    Full list
    Musical career
    Genres
    Pop
    soul
    rhythm and blues
    funk
    rock
    disco
    post-disco
    dance-pop
    new jack swing
    Instrument(s)
    Vocals
    Discography
    Albums
    singles
    songs
    Years active
    1964–2009
    Labels
    Steeltown
    Motown
    Epic
    Legacy
    Sony
    MJJ Productions
    Formerly of
    The Jackson 5
     
    Website
    michaeljackson.com
    Signature
     
    Michael Joseph Jackson (August 29, 1958 – June 25, 2009) was an American singer, songwriter, dancer, and philanthropist. Known as the "King of Pop", he is regarded as one of the most significant cultural figures of the 20th century. During his four-decade career, his contributions to music, dance, and fashion, along with his publicized personal life, made him a global figure in popular culture. Jackson influenced artists across many music genres. Through stage and video performances, he popularized complicated street dance moves such as the moonwalk, which he named, as well as the robot.

    The eighth child of the Jackson family, Jackson made his public debut in 1964 with his older brothers Jackie, Tito, Jermaine, and Marlon as a member of the Jackson 5 (later known as the Jacksons). Jackson began his solo career in 1971 while at Motown Records. He became a solo star with his 1979 album Off the Wall. His music videos, including those for "Beat It", "Billie Jean", and "Thriller" from his 1982 album Thriller, are credited with breaking racial barriers and transforming the medium into an art form and promotional tool. He helped propel the success of MTV and continued to innovate with the videos for his subsequent albums: Bad (1987), Dangerous (1991), HIStory: Past, Present and Future, Book I (1995), and Invincible (2001). Thriller became the best-selling album of all time, while Bad was the first album to produce five US Billboard Hot 100 number-one singles.[nb 1]

    From the late 1980s, Jackson became a figure of controversy and speculation due to his changing appearance, relationships, behavior, and lifestyle. In 1993, he was accused of sexually abusing the child of a family friend. The lawsuit was settled out of civil court; Jackson was not indicted due to lack of evidence. In 2005, he was tried and acquitted of further child sexual abuse allegations and several other charges. The FBI found no evidence of criminal conduct by Jackson in either case. In 2009, while he was preparing for a series of comeback concerts, This Is It, Jackson died from an overdose of propofol administered by his personal physician, Conrad Murray, who was convicted in 2011 of involuntary manslaughter for his involvement in Jackson's death. His death triggered reactions around the world, creating unprecedented surges of internet traffic and a spike in sales of his music. Jackson's televised memorial service, held at the Staples Center in Los Angeles, was estimated to have been viewed by more than 2.5 billion people.

    Jackson is one of the best-selling music artists of all time, with sales estimated around 500 million records worldwide.[nb 2] He had 13 Billboard Hot 100 number-one singles (fourth highest of any artist in the Hot 100 era) and was the first artist to have a top-ten single on the Billboard Hot 100 in five different decades. His honors include 15 Grammy Awards, six Brit Awards, a Golden Globe Award, and 39 Guinness World Records, including the "Most Successful Entertainer of All Time". Jackson's inductions include the Rock and Roll Hall of Fame (twice), the Vocal Group Hall of Fame, the Songwriters Hall of Fame, the Dance Hall of Fame (making him the only recording artist to be inducted) and the Rhythm and Blues Music Hall of Fame.

    Life and career
    Early life and the Jackson 5 (1958–1975)
     Jackson's childhood home in Gary, Indiana, pictured in March 2010
    Michael Joseph Jackson[9][10] was born in Gary, Indiana, on August 29, 1958.[11][12] He was the eighth of ten children in the Jackson family, a working-class African-American family living in a two-bedroom house on Jackson Street.[13][14] His mother, Katherine Esther Jackson (née Scruse), played clarinet and piano, had aspired to be a country-and-western performer, and worked part-time at Sears.[15] She was a Jehovah's Witness.[16] His father, Joseph Walter "Joe" Jackson, a former boxer, was a crane operator at US Steel and played guitar with a local rhythm and blues band, the Falcons, to supplement the family's income.[17][18] Joe's great-grandfather, July "Jack" Gale, was a US Army scout; family lore held that he was also a Native American medicine man.[19] Michael grew up with three sisters (Rebbie, La Toya, and Janet) and five brothers (Jackie, Tito, Jermaine, Marlon, and Randy).[17] A sixth brother, Marlon's twin Brandon, died shortly after birth.[20]

    In 1964, Michael and Marlon joined the Jackson Brothers—a band formed by their father which included Jackie, Tito and Jermaine—as backup musicians playing congas and tambourine.[21][22] Michael said his father told him he had a "fat nose",[23] and physically and emotionally abused him during rehearsals. He recalled that Joe often sat in a chair with a belt in his hand as he and his siblings rehearsed, ready to punish any mistakes.[16][24] Joe acknowledged that he regularly whipped Michael.[25] Katherine said that although whipping came to be considered abuse, it was a common way to discipline children when Michael was growing up.[26][27] Jackie, Tito, Jermaine and Marlon denied that their father was abusive and said that the whippings, which had a deeper impact on Michael because he was younger, kept them disciplined and out of trouble.[28] Michael said that during his youth he was lonely and isolated.[29]

    Later in 1965, Michael began sharing lead vocals with Jermaine, and the group's name was changed to the Jackson 5.[30] In 1965, the group won a talent show; Michael performed the dance to Robert Parker's 1965 song "Barefootin'" and sang the Temptations' "My Girl".[31] From 1966 to 1968, the Jacksons 5 toured the Midwest; they frequently played at a string of black clubs known as the Chitlin' Circuit as the opening act for artists such as Sam & Dave, the O'Jays, Gladys Knight and Etta James. The Jackson 5 also performed at clubs and cocktail lounges, where striptease shows were featured, and at local auditoriums and high school dances.[32][33] In August 1967, while touring the East Coast, they won a weekly amateur night concert at the Apollo Theater in Harlem.[34]

     Michael Jackson (center) as a member of the Jackson 5 in 1972. The group were among the first African American performers to attain a crossover following.[35]
    The Jackson 5 recorded several songs for a Gary record label, Steeltown Records; their first single, "Big Boy", was released in 1968.[36] Bobby Taylor of Bobby Taylor & the Vancouvers brought the Jackson 5 to Motown after they opened for Taylor at Chicago's Regal Theater in 1968. Taylor produced some of their early Motown recordings, including a version of "Who's Lovin' You".[37] After signing with Motown, the Jackson family relocated to Los Angeles.[38] In 1969, Motown executives decided Diana Ross should introduce the Jackson 5 to the public — partly to bolster her career in television — sending off what was considered Motown's last product of its "production line".[39] The Jackson 5 made their first television appearance in 1969 in the Miss Black America pageant, performing a cover of "It's Your Thing".[40] Rolling Stone later described the young Michael as "a prodigy" with "overwhelming musical gifts" who "quickly emerged as the main draw and lead singer".[41]

    In January 1970, "I Want You Back" became the first Jackson 5 song to reach number one on the US Billboard Hot 100; it stayed there for four weeks. Three more singles with Motown topped the chart: "ABC", "The Love You Save", and "I'll Be There".[42] In May 1971, the Jackson family moved into a large house at Hayvenhurst, a 2-acre (0.81 ha) estate in Encino, California.[43] During this period, Michael developed from a child performer into a teen idol.[44] Between 1972 and 1975, he released four solo studio albums with Motown: Got to Be There (1972), Ben (1972), Music & Me (1973) and Forever, Michael (1975).[45] "Got to Be There" and "Ben", the title tracks from his first two solo albums, sold well as singles, as did a cover of Bobby Day's "Rockin' Robin".[46]

    Michael maintained ties to the Jackson 5.[45] The Jackson 5 were later described as "a cutting-edge example of black crossover artists".[47] They were frustrated by Motown's refusal to allow them creative input.[48] Jackson's performance of their top five single "Dancing Machine" on Soul Train popularized the robot dance.[49]

    Move to Epic and Off the Wall (1975–1981)
     The Jackson siblings in 1977, without Jermaine. From left, back row: Jackie, Michael, Tito, Marlon. Middle row: Randy, La Toya, Rebbie. Front row: Janet
    The Jackson 5 left Motown in 1975, signing with Epic Records and renaming themselves the Jacksons.[50] Their younger brother Randy joined the band around this time; Jermaine stayed with Motown and pursued a solo career.[51] The Jacksons continued to tour internationally, and released six more albums between 1976 and 1984. Michael, the group's main songwriter during this time, wrote songs such as "Shake Your Body (Down to the Ground)" (1978), "This Place Hotel" (1980), and "Can You Feel It" (1980).[52]

    In 1977, Jackson moved to New York City to star as the Scarecrow in The Wiz, a musical film directed by Sidney Lumet, alongside Diana Ross, Nipsey Russell, and Ted Ross.[53] The film was a box-office failure.[54] Its score was arranged by Quincy Jones,[55] who later produced three of Jackson's solo albums.[56] During his time in New York, Jackson frequented the Studio 54 nightclub, where he heard early hip hop; this influenced his beatboxing on future tracks such as "Working Day and Night".[57] In 1978, Jackson broke his nose during a dance routine. A rhinoplasty led to breathing difficulties that later affected his career. He was referred to Steven Hoefflin, who performed Jackson's operations.[58]

    Jackson's fifth solo album, Off the Wall (1979), established him as a solo performer and helped him move from the bubblegum pop of his youth to more complex sounds.[44] It produced four top 10 entries in the US: "Off the Wall", "She's Out of My Life", and the chart-topping singles "Don't Stop 'Til You Get Enough" and "Rock with You".[59] The album reached number three on the US Billboard 200 and sold over 20 million copies worldwide.[60] In 1980, Jackson won three American Music Awards for his solo work: Favorite Soul/R&B Album, Favorite Soul/R&B Male Artist, and Favorite Soul/R&B Single for "Don't Stop 'Til You Get Enough".[61][62] He also won a Grammy Award for Best Male R&B Vocal Performance for 1979 with "Don't Stop 'Til You Get Enough".[63] In 1981, Jackson was the American Music Awards winner for Favorite Soul/R&B Album and Favorite Soul/R&B Male Artist.[64] Jackson felt Off the Wall should have made a bigger impact, and was determined to exceed expectations with his next release.[65] In 1980, he secured the highest royalty rate in the music industry: 37 percent of wholesale album profit.[66]

    Thriller and Motown 25: Yesterday, Today, Forever (1982–1983)
     The sequined jacket and white glove worn by Jackson at Motown 25: Yesterday, Today, Forever. British Vogue called Jackson "a fashion pioneer [...] who gave new meaning to moonwalking, immortalised solitary, [and] sparkly gloves".[67]
    Jackson recorded with Queen's lead singer Freddie Mercury from 1981 to 1983, recording demos of "State of Shock", "Victory" and "There Must Be More to Life Than This". The recordings were intended for an album of duets but, according to Queen's manager Jim Beach, the relationship soured when Jackson brought a llama into the recording studio,[68] and Jackson was upset by Mercury's drug use.[69] "There Must Be More to Life Than This" was released in 2014.[70] Jackson went on to record "State of Shock" with Mick Jagger for the Jacksons' album Victory (1984).[71]

    In 1982, Jackson contributed "Someone in the Dark" to the audiobook for the film E.T. the Extra-Terrestrial. Jackson's sixth album, Thriller, was released in late 1982. It was the bestselling album worldwide in 1983,[72][73] and became the bestselling album of all time in the US[74] and the best-selling album of all time worldwide, selling an estimated 70 million copies.[75][76] It topped the Billboard 200 chart for 37 weeks and was in the top 10 of the 200 for 80 consecutive weeks. It was the first album to produce seven Billboard Hot 100 top-10 singles, including "Billie Jean", "Beat It", and "Wanna Be Startin' Somethin'".[77]

    On March 25, 1983, Jackson reunited with his brothers for Motown 25: Yesterday, Today, Forever, an NBC television special. The show aired on May 16 to an estimated audience of 47 million, and featured the Jacksons and other Motown stars.[78] Jackson's solo performance of "Billie Jean" earned him his first Emmy Award nomination.[79] Wearing a glove decorated with rhinestones,[80] he debuted his moonwalk dance, which Jeffrey Daniel had taught him three years earlier, and it became his signature dance in his repertoire.[81] Jackson had originally turned down the invitation to the show, believing he had been doing too much television. But at the request of Motown founder Berry Gordy, he performed in exchange for an opportunity to do a solo performance.[82] Rolling Stone reporter Mikal Gilmore called the performance "extraordinary".[44] Jackson's performance drew comparisons to Elvis Presley's and the Beatles' appearances on The Ed Sullivan Show.[83] Anna Kisselgoff of The New York Times praised the perfect timing and technique involved in the dance.[84] Gordy described being "mesmerized" by the performance.[85]

    At the 26th Annual Grammy Awards, Thriller won eight awards, and Jackson won an award for the E.T. the Extra-Terrestrial storybook. Winning eight Grammys in one ceremony is a record he holds with the band Santana.[63] Jackson and Quincy Jones won the award for Producer of the Year (Non-Classical). Thriller won Album of the Year (with Jackson as the album's artist and Jones as its co-producer), and the single won Best Pop Vocal Performance (Male) award for Jackson. "Beat It" won Record of the Year and Best Rock Vocal Performance (Male). "Billie Jean" won two Grammy awards: Best R&B Song and Best R&B Vocal Performance (Male), with Jackson as songwriter and singer respectively.[63]

    Thriller won the Grammy for Best Engineered Recording (Non Classical), acknowledging Bruce Swedien for his work on the album.[86] At the 11th Annual American Music Awards, Jackson won another eight awards and became the youngest artist to win the Award of Merit.[87] He also won Favorite Male Artist, Favorite Soul/R&B Artist, and Favorite Pop/Rock Artist. "Beat It" won Favorite Soul/R&B Video, Favorite Pop/Rock Video and Favorite Pop/Rock Single. The album won Favorite Soul/R&B Album and Favorite Pop/Rock Album.[87][88] Thriller's sales doubled after the release of an extended music video, Michael Jackson's Thriller, which sees Jackson dancing with a horde of zombies.[89][90]

    The success transformed Jackson into a dominant force in global pop culture.[90] Jackson had the highest royalty rate in the music industry at that point, with about $2 for every album sold (equivalent to $6 in 2023), and was making record-breaking profits. Dolls modeled after Jackson appeared in stores in May 1984 for $12 each.[91] In the same year, The Making of Michael Jackson's Thriller, a documentary about the music video, won a Grammy for Best Music Video (Longform).[63] Time described Jackson's influence at that point as "star of records, radio, rock video. A one-man rescue team for the music business. A songwriter who sets the beat for a decade. A dancer with the fanciest feet on the street. A singer who cuts across all boundaries of taste and style and color too."[91] The New York Times wrote "in the world of pop music, there is Michael Jackson and there is everybody else".[92]

    Pepsi incident and other commercial activities (1984–1985)
    In November 1983, Jackson and his brothers partnered with PepsiCo in a $5 million promotional deal that broke records for a celebrity endorsement (equivalent to $15.3 million in 2023). The first Pepsi campaign, which ran in the US from 1983 to 1984 and launched its "New Generation" theme, included tour sponsorship, public relations events, and in-store displays. Jackson helped to create the advertisement, and suggested using his song "Billie Jean", with revised lyrics, as its jingle.[93]

    On January 27, 1984, Michael and other members of the Jacksons filmed a Pepsi commercial overseen by Phil Dusenberry,[94] a BBDO ad agency executive, and Alan Pottasch, Pepsi's Worldwide Creative Director, at the Shrine Auditorium in Los Angeles. During a simulated concert before a full house of fans, pyrotechnics accidentally set Jackson's hair on fire, causing second-degree burns to his scalp. Jackson underwent treatment to hide the scars and had his third rhinoplasty shortly thereafter.[95]

    Pepsi settled out of court, and Jackson donated the $1.5 million settlement to the Brotman Medical Center in Culver City, California; its now-closed Michael Jackson Burn Center was named in his honor.[96][97] Jackson signed a second agreement with Pepsi in the late 1980s for $10 million. The second campaign covered 20 countries and provided financial support for Jackson's Bad album and 1987–88 world tour. Jackson had endorsements and advertising deals with other companies, such as LA Gear, Suzuki, and Sony, but none were as significant as his deals with Pepsi.[93]

     The Jacksons performing during their Victory Tour at the Arrowhead Stadium, 1984
    The Victory Tour of 1984 headlined the Jacksons and showcased Jackson's new solo material to more than two million Americans. It was the last tour he did with his brothers.[98] Following controversy over the concert's ticket sales, Jackson donated his share of the proceeds, an estimated $3 to 5 million, to charity.[99] During the last concert of the Victory Tour at the Dodger Stadium in Los Angeles, Jackson announced his split from the Jacksons during "Shake Your Body".[100]

    With Lionel Richie, Jackson co-wrote the charity single "We Are the World" (1985), which raised money for the poor in the US and Africa.[101][102] It earned $63 million (equivalent to $178 million in 2023),[102] and became one of the best-selling singles of all time, with 20 million copies sold.[103] It won four Grammy Awards in 1985, including Song of the Year for Jackson and Richie.[101] Jackson, Jones, and the promoter Ken Kragen received special awards for their roles in the song's creation.[101][104][105][106]

     Jackson signing a "We Are the World" poster in 1985
    Jackson collaborated with Paul McCartney in the early 1980s, and learned that McCartney was making $40 million a year from owning the rights to other artists' songs.[102] By 1983, Jackson had begun buying publishing rights to others' songs, but he was careful with his acquisitions, only bidding on a few of the dozens that were offered to him. Jackson's early acquisitions of music catalogs and song copyrights such as the Sly Stone collection included "Everyday People" (1968), Len Barry's "1-2-3" (1965), and Dion DiMucci's "The Wanderer" (1961) and "Runaround Sue" (1961).

    In 1984, Robert Holmes à Court announced he was selling the ATV Music Publishing catalog comprising the publishing rights to nearly 4,000 songs, including most of the Beatles' material.[107] In 1981, McCartney had been offered the catalog for £20 million ($40 million).[102][108] Jackson submitted a bid of $46 million on November 20, 1984.[107] When Jackson and McCartney were unable to make a joint purchase, McCartney did not want to be the sole owner of the Beatles' songs, and did not pursue an offer on his own.[109][108] Jackson's agents were unable to come to a deal, and in May 1985 left talks after having spent more than $1 million and four months of due diligence work on the negotiations.[107]

    In June 1985, Jackson and Branca learned that Charles Koppelman's and Marty Bandier's The Entertainment Company had made a tentative offer to buy ATV Music for $50 million; in early August, Holmes à Court contacted Jackson and talks resumed. Jackson's increased bid of $47.5 million (equivalent to $135 million in 2023) was accepted because he could close the deal more quickly, having already completed due diligence.[107] Jackson agreed to visit Holmes à Court in Australia, where he would appear on the Channel Seven Perth Telethon.[110] His purchase of ATV Music was finalized on August 10, 1985.[102][107]

    Increased tabloid speculation (1986–1987)
    See also: Health and appearance of Michael Jackson
    Jackson's skin had been medium-brown during his youth, but from the mid-1980s gradually grew paler. The change drew widespread media coverage, including speculation that he had been bleaching his skin.[111][112][113] His dermatologist, Arnold Klein, said he observed in 1983 that Jackson had vitiligo,[114] a condition characterized by patches of the skin losing their pigment. He also identified discoid lupus erythematosus in Jackson. He diagnosed Jackson with lupus that year,[114] and with vitiligo in 1986.[115] Vitiligo's drastic effects on the body can cause psychological distress. Jackson used fair-colored makeup,[116] and possibly skin-bleaching prescription creams,[117] to cover up the uneven blotches of color caused by the illness. The creams would depigment the blotches, and, with the application of makeup, he could appear very pale.[118] Jackson said he had not purposely bleached his skin and could not control his vitiligo, adding, "When people make up stories that I don't want to be who I am, it hurts me."[119] He became friends with Klein and Klein's assistant, Debbie Rowe. Rowe later became Jackson's second wife and the mother of his first two children.[120]

    In his 1988 autobiography and a 1993 interview, Jackson said he had had two rhinoplasty surgeries and a cleft chin surgery but no more than that. He said he lost weight in the early 1980s because of a change in diet to achieve a dancer's body.[121] Witnesses reported that he was often dizzy, and speculated he was suffering from anorexia nervosa. Periods of weight loss became a recurring problem later in his life.[122] After his death, Jackson's mother said that he first turned to cosmetic procedures to remedy his vitiligo, because he did not want to look like a "spotted cow". She said he had received more than the two cosmetic surgeries he claimed and speculated that he had become addicted to them.[123]

    In 1986, it was reported that Jackson slept in a hyperbaric oxygen chamber to slow aging. He denied the story,[124] although it was alleged that Jackson leaked an image of him sleeping in a glass chamber (according to Jackson, this was a promotional shot from an upcoming space opera featuring himself) to The National Enquirer.[125] It was also reported that Jackson took female hormone shots to keep his voice high and facial hair wispy, proposed to Elizabeth Taylor and possibly had a shrine of her, and had cosmetic surgery on his eyes. Jackson's manager Frank DiLeo denied all of them, except for Jackson having a chamber. DiLeo added "I don't know if he sleeps in it. I'm not for it. But Michael thinks it's something that's probably healthy for him. He's a bit of a health fanatic."[126]

    When Jackson took his pet chimpanzee Bubbles to tour in Japan, the media portrayed Jackson as an aspiring Disney cartoon character who befriended animals.[127] It was also reported that Jackson had offered to buy the bones of Joseph Merrick (the "Elephant Man").[128] In June 1987, the Chicago Tribune reported Jackson's publicist bidding $1 million for the skeleton to the London Hospital Medical College on his behalf. The college maintained the skeleton was not for sale. DiLeo said Jackson had an "absorbing interest" in Merrick, "purely based on his awareness of the ethical, medical and historical significance."[129]

    In September 1986, using the oxygen chamber story, the British tabloid The Sun branded Jackson "Wacko Jacko", a name Jackson came to despise.[10][130] The Atlantic noted that the name "Jacko" has racist connotations, as it originates from Jacko Macacco, a monkey used in monkey-baiting matches at the Westminster Pit in the early 1820s, and "Jacko" was used in Cockney slang to refer to monkeys in general.[131]

    Jackson worked with George Lucas and Francis Ford Coppola on the 17-minute $30 million 3D film Captain EO, which ran from 1986 at Disneyland and Epcot, and later at Tokyo Disneyland and Euro Disneyland.[132] After having been removed in the late 1990s, it returned to the theme park for several years after Jackson's death.[133] In 1987, Ebony reported that Jackson had disassociated himself from the Jehovah's Witnesses.[134] Katherine Jackson said this might have been because some Witnesses strongly opposed the Thriller video,[135] which Michael denounced in a Witness publication in 1984.[136] In 2001, Jackson told an interviewer he was still a Jehovah's Witness.[137]

    Bad, autobiography, and Neverland (1987–1990)
     Jackson and President George H. W. Bush at the White House on April 5, 1990. It was the second time that Jackson had been honored by a president of the United States.
    Jackson's first album in five years, Bad (1987), was highly anticipated, with the industry expecting another major success.[138] It became the first album to produce five US number-one singles: "I Just Can't Stop Loving You", "Bad", "The Way You Make Me Feel", "Man in the Mirror", and "Dirty Diana". Another song, "Smooth Criminal", peaked at number seven.[59] Bad won the 1988 Grammy for Best Engineered Recording – Non Classical and the 1990 Grammy Award for Best Music Video, Short Form for "Leave Me Alone".[63][86] Jackson won an Award of Achievement at the American Music Awards in 1989 after Bad generated five number-one singles, became the first album to top the charts in 25 countries and the bestselling album worldwide in 1987 and 1988.[139][140] By 2012, it had sold between 30 and 45 million copies worldwide.[141][142]

    The Bad World Tour ran from September 12, 1987, to January 14, 1989.[143] In Japan, the tour had 14 sellouts and drew 570,000 people, nearly tripling the previous record for a single tour.[144] The 504,000 people who attended seven sold-out shows at Wembley Stadium set a new Guinness World Record.[145]

    In 1988, Jackson released his autobiography, Moonwalk, with input from Stephen Davis and Jacqueline Kennedy Onassis.[146] It sold 200,000 copies,[147] and reached the top of the New York Times bestsellers list.[148] Jackson discussed his childhood, the Jackson 5, and the abuse from his father.[149] He attributed his changing facial appearance to three plastic surgeries, puberty, weight loss, a strict vegetarian diet, a change in hairstyle, and stage lighting.[150][121] In June, Jackson was honored with the Grand Vermeil Medal of the City of Paris by the then Mayor of Paris Jacques Chirac during his stay in the city as part of the Bad World Tour.[151][152] In October, Jackson released a film, Moonwalker, which featured live footage and short films starring Jackson and Joe Pesci. In the US it was released direct-to-video and became the bestselling video cassette in the country.[153][154] The Recording Industry Association of America (RIAA) certified it as eight times Platinum in the US.[155]

    In March 1988, Jackson purchased 2,700 acres (11 km2) of land near Santa Ynez, California, to build a new home, Neverland Ranch, at a cost of $17 million (equivalent to $44 million in 2023).[156] He installed a Ferris wheel, a carousel, a movie theater and a zoo.[156][157][158] A security staff of 40 patrolled the grounds.[157] Shortly afterwards, he appeared in the first Western television advertisement in the Soviet Union.[159]

    Jackson became known as the "King of Pop", a nickname that Jackson's publicists embraced.[24][160][161] When Elizabeth Taylor presented him with the Soul Train Heritage Award in 1989, she called him "the true king of pop, rock and soul."[162] President George H. W. Bush designated him the White House's "Artist of the Decade".[163] From 1985 to 1990, Jackson donated $455,000 to the United Negro College Fund,[164] and all profits from his single "Man in the Mirror" went to charity.[165] His rendition of "You Were There" at Sammy Davis Jr.'s 60th birthday celebration won Jackson a second Emmy nomination.[79] Jackson was the bestselling artist of the 1980s.[166]

    Dangerous and public social work (1991–1993)
    In March 1991, Jackson renewed his contract with Sony for $65 million (equivalent to $145 million in 2023), a record-breaking deal,[167] beating Neil Diamond's renewal contract with Columbia Records.[168] In 1991, he released his eighth album, Dangerous, co-produced with Teddy Riley.[169] It was certified eight times platinum in the US, and by 2018 had sold 32 million copies worldwide.[170][171] In the US, the first single, "Black or White", was the album's highest-charting song; it was number one on the Billboard Hot 100 for seven weeks and achieved similar chart performances worldwide.[172] The second single, "Remember the Time" peaked at number three on the Billboard Hot 100 singles chart.[173] At the end of 1992, Dangerous was the bestselling album of the year worldwide and "Black or White" the bestselling single of the year worldwide at the Billboard Music Awards.[166] In 1993, he performed "Remember the Time" at the Soul Train Music Awards in a chair, saying he twisted his ankle during dance rehearsals.[174] In the UK, "Heal the World" made No. 2 on the charts in 1992.[175]

     Jackson during the Dangerous World Tour in 1993. Dangerous has been recognized by writers as an influence on contemporary pop and R&B artists.[176]
     Michael Jackson with David and Marty Paich in 1991
    Jackson founded the Heal the World Foundation in 1992. The charity brought underprivileged children to Jackson's ranch to use the theme park rides, and sent millions of dollars around the globe to help children threatened by war, poverty, and disease. That July, Jackson published his second book, Dancing the Dream, a collection of poetry. The Dangerous World Tour ran between June 1992 and November 1993 and grossed $100 million (equivalent to $210 million in 2023); Jackson performed for 3.5 million people in 70 concerts, all of which were outside the US.[177] Part of the proceeds went to Heal the World Foundation.[178] Jackson sold the broadcast rights of the tour to HBO for $20 million, a record-breaking deal that still stands.[179]

    Following the death of HIV/AIDS spokesperson and friend Ryan White, Jackson pleaded with the Clinton administration at Bill Clinton's inaugural gala to give more money to HIV/AIDS charities and research[180][181] and performed "Gone Too Soon", a song dedicated to White, and "Heal the World" at the gala.[182] Jackson visited Africa in early 1992; on his first stop in Gabon he was greeted by more than 100,000 people, some of them carrying signs that read "Welcome Home Michael",[183] and was awarded an Officer of the National Order of Merit from President Omar Bongo.[184][185] During his trip to Ivory Coast, Jackson drew larger crowds than Pope John Paul II on his previous visits.[186] He was crowned "King Sani" by a tribal chief in the Ivorian village of Krindjabo, where he thanked the dignitaries in French and English, signed documents formalizing his kingship, and sat on a golden throne while presiding over ceremonial dances.[183]

    In January 1993, Jackson performed at the Super Bowl XXVII halftime show in Pasadena, California. The NFL sought a big-name artist to keep ratings high during halftime following dwindling audience figures.[187][188] It was the first Super Bowl whose half-time performance drew greater audience figures than the game. Jackson played "Jam", "Billie Jean", "Black or White", and "Heal the World". Dangerous rose 90 places in the US albums chart after the performance.[111]

    Jackson gave a 90-minute interview with Oprah Winfrey on February 10, 1993. He spoke of his childhood abuse at the hands of his father; he believed he had missed out on much of his childhood, and said that he often cried from loneliness. He denied tabloid rumors that he had bought the bones of the Elephant Man, slept in a hyperbaric oxygen chamber, or bleached his skin, and stated for the first time that he had vitiligo. After the interview, Dangerous re-entered the US albums chart in the top 10, more than a year after its release.[24][111] The interview itself became the most-watched television interview in United States history to date.

    In January 1993, Jackson won three American Music Awards: Favorite Pop/Rock Album (Dangerous), Favorite Soul/R&B Single ("Remember the Time"), and was the first to win the International Artist Award of Excellence.[189][190] In February, he won the "Living Legend Award" at the 35th Annual Grammy Awards in Los Angeles.[63] He attended the award ceremony with Brooke Shields.[191] Dangerous was nominated for Best Vocal Performance (for "Black or White"), Best R&B Vocal Performance ("Jam") and Best R&B Song ("Jam"), and Bruce Swedien and Teddy Riley won the Grammy for Best Engineered – Non Classical.[86]

    First child sexual abuse accusations and first marriage (1993–1995)
    Main article: 1993 child sexual abuse accusations against Michael Jackson
    In August 1993, Jackson was accused of child sexual abuse by a 13-year-old boy, Jordan Chandler, and his father, Evan Chandler.[192] Jordan said he and Jackson had engaged in acts of kissing, masturbation and oral sex.[193] While Jordan's mother initially told police that she did not believe Jackson had molested him, her position wavered a few days later.[194][195] Evan was recorded discussing his intention to pursue charges, which Jackson used to argue that he was the victim of a jealous father trying to extort money.[195] Jackson's older sister La Toya accused him of being a pedophile;[196] she later retracted this, saying she had been forced into it by her abusive husband.[197]

    Police raided Jackson's home in August and found two legal large-format art books featuring young boys playing, running and swimming in various states of undress.[198] Jackson denied knowing of the books' content and claimed if they were there someone had to send them to him and he did not open them.[199] Jordan Chandler gave police a description of Jackson's genitals. A strip search was made, and the jurors felt the description was not a match.[200][201][202] In January 1994, Jackson settled with the Chandlers out of court for a reported total sum of $23 million.[203] The police never pressed criminal charges.[204] Citing a lack of evidence without Jordan's testimony, the state closed its investigation on September 22, 1994.[205]

    Jackson had been taking painkillers for his reconstructive scalp surgeries, administered due to the Pepsi commercial accident in 1984, and became dependent on them to cope with the stress of the sexual abuse allegations.[206] On November 12, 1993, Jackson canceled the remainder of the Dangerous World Tour due to health problems, stress from the allegations and painkiller addiction. He thanked his close friend Elizabeth Taylor for support, encouragement and counsel. The end of the tour concluded his sponsorship deal with Pepsi.[207]

    In late 1993, Jackson proposed to Lisa Marie Presley, the daughter of Elvis Presley, over the phone.[208] They married in La Vega, Dominican Republic, in May 1994 by civil judge Hugo Francisco Álvarez Pérez.[209] The tabloid media speculated that the wedding was a publicity stunt to deflect away from Jackson's sexual abuse allegations and jump-start Presley's career as a singer.[210][209] Their marriage ended little more than a year later, and they separated in December 1995.[211] Presley cited "irreconcilable differences" when filing for divorce the next month and only sought to reclaim her maiden name as her settlement.[210][212] After the divorce, Judge Pérez said, "They lasted longer than I thought they would. I gave them a year. They lasted a year and a half."[209] Presley later said she and Jackson had attempted to reconcile intermittently for four years following their divorce, and that she had traveled the world to be with him.[213]

    Jackson composed music for the Sega Genesis video game Sonic the Hedgehog 3 (1994), but left the project around the time the sexual abuse allegations surfaced and went uncredited.[214][215] The Sega Technical Institute director Roger Hector and the Sonic co-creator Naoto Ohshima said that Jackson's involvement was terminated and his music reworked following the allegations.[216][217] However, Jackson's musical director Brad Buxer and other members of Jackson's team said Jackson went uncredited because he was unhappy with how the Genesis replicated his music.[218]

    HIStory, second marriage, fatherhood and Blood on the Dance Floor: HIStory in the Mix (1995–1997)
     Jackson at the 1997 Cannes Film Festival for the premiere of Michael Jackson's Ghosts
    In June 1995, Jackson released the double album HIStory: Past, Present and Future, Book I. The first disc, HIStory Begins, is a greatest hits album (reissued in 2001 as Greatest Hits: HIStory, Volume I). The second disc, HIStory Continues, contains 13 original songs and two cover versions. The album debuted at number one on the charts and has been certified for eight million shipments in the US.[219] It is the bestselling multi-disc album of all time, with 20 million copies (40 million units) sold worldwide.[172][220] HIStory received a Grammy nomination for Album of the Year.[63] The New York Times reviewed it as "the testimony of a musician whose self-pity now equals his talent".[221]

    The first single from HIStory was "Scream/Childhood". "Scream", a duet with Jackson's youngest sister Janet, protests the media's treatment of Jackson during the 1993 child abuse allegations against him. The single reached number five on the Billboard Hot 100,[173] and received a Grammy nomination for "Best Pop Collaboration with Vocals".[63] The second single, "You Are Not Alone", holds the Guinness world record for the first song to debut at number one on the Billboard Hot 100 chart.[222] It received a Grammy nomination for "Best Pop Vocal Performance" in 1995.[63]

    In 1995 the Anti-Defamation League and other groups complained that "Jew me, sue me, everybody do me/ Kick me, kike me, don't you black or white me", the original lyrics of "They Don't Care About Us", were antisemitic. Jackson released a revised version of the song.[223]

    In late 1995, Jackson was admitted to a hospital after collapsing during rehearsals for a televised performance, caused by a stress-related panic attack.[224] In November, Jackson merged his ATV Music catalog with Sony's music publishing division, creating Sony/ATV Music Publishing. He retained ownership of half the company, earning $95 million up front (equivalent to $190 million in 2023) as well as the rights to more songs.[225][226]

    "Earth Song" was the third single released from HIStory, and topped the UK Singles Chart for six weeks over Christmas 1995.[175] It became the 87th-bestselling single in the UK.[227] At the 1996 Brit Awards, Jackson's performance of "Earth Song" was disrupted by Pulp singer Jarvis Cocker, who was protesting what Cocker saw as Jackson's "Christ-like" persona. Jackson said the stage invasion was "disgusting and cowardly".[228][229]

    In 1996, Jackson won a Grammy for Best Music Video, Short Form, for "Scream" and an American Music Award for Favorite Pop/Rock Male Artist.[63][230] In July 1996, Jackson performed for Sultan Hassanal Bolkiah's fiftieth birthday at Jerudong Park Amphitheater, which was specifically built for that birthday concert.[231] Jackson was reportedly paid $17 million (equivalent to $33 million in 2023).[232] Jackson promoted HIStory with the HIStory World Tour, from September 7, 1996, to October 15, 1997. He performed 82 concerts in five continents, 35 countries and 58 cities to over 4.5 million fans, his most attended tour. It grossed $165 million.[143] During the tour, in Sydney, Australia, Jackson married Debbie Rowe, a dermatology assistant, who was six months pregnant with his first child.[233]

    Michael Joseph Jackson Jr. (commonly known as Prince) was born on February 13, 1997. His sister Paris-Michael Katherine Jackson was born on April 3, 1998.[234] Jackson and Rowe divorced in 2000, Rowe conceded custody of the children, with an $8 million settlement (equivalent to $14.6 million in 2023).[235] In 2004, after the second child abuse allegations against Jackson, she returned to court to reclaim custody. The suit was settled in 2006.[236]

    In 1997, Jackson released Blood on the Dance Floor: HIStory in the Mix, which contained remixes of singles from HIStory and five new songs. Worldwide sales stand at 6 million copies, making it the best-selling remix album. It reached number one in the UK, as did the single "Blood on the Dance Floor".[237] In the US, the album reached number 24 and was certified platinum.[170]

    Label dispute and Invincible (1997–2002)
    From October 1997 to September 2001, Jackson worked on his tenth solo album, Invincible, which cost $30 million to record, making it the most expensive album of all time.[238] In June 1999, Jackson joined Luciano Pavarotti for a War Child benefit concert in Modena, Italy. The show raised a million dollars for refugees of the Kosovo War, and additional funds for the children of Guatemala.[239] Later that month, Jackson organized a series of "Michael Jackson & Friends" benefit concerts in Germany and Korea. Other artists involved included Slash, The Scorpions, Boyz II Men, Luther Vandross, Mariah Carey, A. R. Rahman, Prabhu Deva Sundaram, Shobana, Andrea Bocelli and Luciano Pavarotti. The proceeds went to the Nelson Mandela Children's Fund, the Red Cross and UNESCO.[240] In 1999, Jackson was presented with the "Outstanding Humanitarian Award" at Bollywood Movie Awards in New York City where he noted Mahatma Gandhi to have been an inspiration for him.[241][242] From August 1999 to 2000, he lived in New York City at 4 East 74th Street.[243] At the turn of the century, Jackson won an American Music Award as Artist of the 1980s.[244] In 2000, Guinness World Records recognized him for supporting 39 charities, more than any other entertainer.[245]

    In September 2001, two concerts were held at Madison Square Garden to mark Jackson's 30th year as a solo artist. Jackson performed with his brothers for the first time since 1984. The show also featured Mýa, Usher, Whitney Houston, Destiny's Child, Monica, Liza Minnelli and Slash. The first show was marred by technical lapses, and the crowd booed a speech by Marlon Brando.[246] Almost 30 million people watched the television broadcast of the shows in November.[247] After the September 11 attacks (in which Jackson narrowly avoided death by oversleeping and missing a scheduled meeting at the World Trade Center[248]), Jackson helped organize the United We Stand: What More Can I Give benefit concert at RFK Stadium in Washington, D.C., on October 21, 2001. Jackson performed "What More Can I Give" as the finale.[249]

    The release of Invincible was preceded by a dispute between Jackson and his record label, Sony Music Entertainment. Jackson had expected the licenses to the masters of his albums to revert to him in the early 2000s, after which he would be able to promote the material however he pleased and keep the profits, but clauses in the contract set the revert date years into the future. Jackson sought an early exit from his contract.[250] Invincible was released on October 30, 2001. It was Jackson's first full-length album in six years, and the last album of original material he released in his lifetime.[250] It debuted at number one in 13 countries, and went on to sell eight million copies worldwide, receiving double-platinum certification in the US.[170][251][252]

    On January 9, 2002, Jackson won his 22nd American Music Award for Artist of the Century.[253][254] Later that year, an anonymous surrogate mother gave birth to his third child, Prince Michael Jackson II (nicknamed "Blanket"[nb 3]), who had been conceived by artificial insemination.[255] On November 20, Jackson briefly held Blanket over the railing of his Berlin hotel room, four stories above ground level, prompting widespread criticism in the media. Jackson apologized for the incident, calling it "a terrible mistake".[256] On January 22, promoter Marcel Avram filed a breach of contract complaint against Jackson for failing to perform two planned 1999 concerts.[257] In March, a Santa Maria jury ordered Jackson to pay Avram $5.3 million.[258][259] On December 18, 2003, Jackson's attorneys dropped all appeals on the verdict and settled the lawsuit for an undisclosed amount.[260]

    On April 24, 2002, Jackson performed at Apollo Theater. The concert was a fundraiser for the Democratic National Committee and former President Bill Clinton.[261] The money collected would be used to encourage citizens to vote. It raised $2.5 million.[262] The concert was called Michael Jackson: Live at the Apollo and was one of Jackson's final on-stage performances.[263]

    In July 2002, Jackson called Sony Music chairman Tommy Mottola "a racist, and very, very, very devilish," and someone who exploits black artists for his own gain, at Al Sharpton's National Action Network in Harlem. The accusation prompted Sharpton to form a coalition investigating whether Mottola exploited black artists.[264] Jackson charged that Mottola had called his colleague Irv Gotti a "fat nigger".[265] Responding to those attacks, Sony issued a statement calling them "ludicrous, spiteful, and hurtful" and defended Mottola as someone who had championed Jackson's career for many years.[264] Sony ultimately refused to renew Jackson's contract and claimed that a $25 million promotional campaign had failed because Jackson refused to tour in the US for Invincible.[238]

    Documentary, Number Ones, second child abuse allegations and acquittal (2002–2005)
    Further information: Trial of Michael Jackson
     Jackson in Las Vegas, 2003
    Beginning in May 2002, a documentary film crew led by Martin Bashir followed Jackson for several months.[256] The documentary, broadcast in February 2003 as Living with Michael Jackson, showed Jackson holding hands and discussing sleeping arrangements with a twelve-year-old boy.[23][266] He said that he saw nothing wrong with having sleepovers with minors and sharing his bed and bedroom with various people, which aroused controversy. He insisted that the sleepovers were not sexual and that his words had been misunderstood.[267][268]

    In October 2003, Jackson received the Key to the City of Las Vegas from Mayor Oscar Goodman.[269] On November 18, 2003, Sony released Number Ones, a greatest hits compilation. It was certified five times platinum by the RIAA, and ten times platinum in the UK, for shipments of at least 3 million units.[170][270]

    On December 18, 2003, Santa Barbara authorities charged Jackson with seven counts of child molestation and two counts of intoxicating a minor with alcoholic drinks.[271] Jackson denied the allegations and pleaded not guilty.[272] The People v. Jackson trial began on January 31, 2005, in Santa Maria, California, and lasted until the end of May. Jackson found the experience stressful and it affected his health. If convicted, he would have faced up to twenty years in prison.[273] On June 13, 2005, Jackson was acquitted on all counts.[274] FBI files on Jackson, released in 2009, revealed the FBI's role in the 2005 trial and the 1993 allegations, and showed that the FBI found no evidence of criminal conduct on Jackson's behalf.[275][276]

    Final years, financial problems, Thriller 25 and This Is It (2005–2009)
     Jackson and his son Blanket in Disneyland Paris, 2006
    After the trial, Jackson became reclusive.[277] In June 2005, he moved to Bahrain as a guest of Sheikh Abdullah.[278] In early 2006, it was announced that Jackson had signed a contract with a Bahrain startup, Two Seas Records. Nothing came of the deal, and the Two Seas CEO, Guy Holmes, later said it was never finalized.[279][280] Holmes also found that Jackson was on the verge of bankruptcy and was involved in 47 ongoing lawsuits.[278] By September 2006, Jackson was no longer affiliated with Two Seas.[280]

    In April 2006, Jackson agreed to use a piece of his ATV catalog stake, then worth about $1 billion, as collateral against his $270 million worth of loans from Bank of America. Bank of America had sold the loans to Fortress Investments, an investment company that buys distressed loans, the year before. As part of the agreement, Fortress Investments provided Jackson a new loan of $300 million with reduced interest payments (equivalent to $450 million in 2023). Sony Music would have the option to buy half of his stake, or about 25% of the catalog, at a set price. Jackson's financial managers had urged him to shed part of his stake to avoid bankruptcy.[226][281] The main house at Neverland Ranch was closed as a cost-cutting measure, while Jackson lived in Bahrain at the hospitality of Abdullah.[282] At least thirty of Jackson's employees had not been paid on time and were owed $306,000 in back wages. Jackson was ordered to pay $100,000 in penalties.[226] Jackson never returned to Neverland after his acquittal.[283]

    In mid-2006, Jackson moved to Grouse Lodge, a residential recording studio near Rosemount, County Westmeath, Ireland. There, he began work on a new album with the American producers will.i.am and Rodney Jenkins.[284] That November, Jackson invited an Access Hollywood camera crew into the studio in Westmeath.[172] On November 15, Jackson briefly joined in on a performance of "We Are the World" at the World Music Awards in London, his last public performance, and accepted the Diamond Award for sales of 100 million records.[172][285] He returned to the US in December, settling in Las Vegas. That month, he attended James Brown's funeral in Augusta, Georgia, where he gave a eulogy calling Brown his greatest inspiration.[286]

     An aerial view of part of Jackson's 2,800-acre (11 km2) Neverland Valley Ranch near Los Olivos, California, showing the rides
    In 2007, Jackson and Sony bought another music publishing company, Famous Music LLC, formerly owned by Viacom. The deal gave Jackson the rights to songs by Eminem and Beck, among others.[287][288] In a brief interview, Jackson said he had no regrets about his career despite his problems and "deliberate attempts to hurt [him]".[289] That March, Jackson visited a US Army post in Japan, Camp Zama, to greet more than 3,000 troops and their families.[290][291] As of September, Jackson was still working on his next album, which he never completed.[292]

    In 2008, for the 25th anniversary of Thriller, Jackson and Sony released Thriller 25, with two remixes released as singles: "The Girl Is Mine 2008" and "Wanna Be Startin' Somethin' 2008".[293] For Jackson's 50th birthday, Sony BMG released a series of greatest hits albums, King of Pop, with different tracklists for different regions.[294] That July, Fortress Investments threatened to foreclose on Neverland Ranch, which Jackson had used as collateral for his loans. Fortress sold Jackson's debts to Colony Capital LLC.[295][296] In November, Jackson transferred Neverland Ranch's title to Sycamore Valley Ranch Company LLC, a joint venture between Jackson and Colony Capital LLC. The deal earned him $35 million.[297] In 2009, Jackson arranged to sell a collection of his memorabilia of more than 1,000 items through Julien's Auction House, but canceled the auction in April.[298]

    In March 2009, amid speculation about his finances and health, Jackson announced a series of comeback concerts, This Is It, at a press conference at the O2 Arena.[299] The shows were to be his first major concerts since the HIStory World Tour in 1997. Jackson suggested he would retire after the shows. The initial plan was for ten concerts in London, followed by shows in Paris, New York City and Mumbai. Randy Phillips, the president and chief executive of AEG Live, predicted the first ten dates would earn Jackson £50 million.[300]

    The London residency was increased to fifty dates after record-breaking ticket sales; more than one million were sold in less than two hours.[301] The concerts were to run from July 13, 2009, to March 6, 2010. Jackson moved to Los Angeles, where he rehearsed in the weeks leading up to the tour under the direction of the choreographer Kenny Ortega, whom he had worked with during his previous tours. Rehearsals took place at the Forum and the Staples Center owned by AEG.[302] By this point, Jackson's debt had grown to almost $500 million. By the time of his death, he was three or four months behind payments of his home in San Fernando Valley.[303][304] The Independent reported that Jackson planned a string of further ventures designed to recoup his debts, including a world tour, a new album, films, a museum and a casino.[299]

    Death
    Main article: Death of Michael Jackson
     Fans placed flowers and notes on Jackson's star on the Hollywood Walk of Fame on the day of his death
    On June 25, 2009, less than three weeks before his concert residency was due to begin in London, with all concerts sold out, Jackson died from cardiac arrest, caused by a propofol and benzodiazepine overdose.[305][306] Conrad Murray, his personal physician, had given Jackson various medications to help him sleep at his rented mansion in Holmby Hills, Los Angeles. Paramedics received a 911 call at 12:22 pm Pacific time (19:22 UTC) and arrived three minutes later.[307][308] Jackson was not breathing and CPR was performed.[309] Resuscitation efforts continued en route to Ronald Reagan UCLA Medical Center, and for more than an hour after Jackson's arrival there, but were unsuccessful,[310][311] and Jackson was pronounced dead at 2:26 pm Pacific time (21:26 UTC).[312][313]

    Murray had administered propofol, lorazepam, and midazolam;[314] his death was caused by a propofol overdose.[306][311] News of his death spread quickly online, causing websites to slow down and crash from user overload,[315] and it put unprecedented strain[316] on many services and websites including Google,[317] AOL Instant Messenger,[316] Twitter and Wikipedia.[317] Overall, web traffic rose by between 11% and 20%.[318][319] MTV and BET aired marathons of Jackson's music videos,[320] and Jackson specials aired on television stations around the world.[321] MTV briefly returned to its original music video format,[11] and they aired hours of Jackson's music videos, with live news specials featuring reactions from MTV personalities and other celebrities.[322]

    Memorial service
    Main article: Michael Jackson memorial service
     
    Jackson's unmarked crypt at the end of the Sanctuary of Ascension in the Holly Terrace of the Great Mausoleum, Forest Lawn Glendale
     
    Fans visiting the makeshift memorial set up outside the Neverland Ranch entrance shortly after Jackson's death
    Jackson's memorial was held on July 7, 2009, at the Staples Center in Los Angeles, preceded by a private family service at Forest Lawn Memorial Park's Hall of Liberty. Over 1.6 million fans applied for tickets to the memorial; the 8,750 recipients were drawn at random, and each received two tickets.[323] The memorial service was one of the most watched events in streaming history,[324] with an estimated US audience of 31.1 million[325] and a worldwide audience of an estimated 2.5 to 3 billion.[326][327]

    Mariah Carey, Stevie Wonder, Lionel Richie, Jennifer Hudson, and Shaheen Jafargholi performed at the memorial, and Smokey Robinson and Queen Latifah gave eulogies.[328] Al Sharpton received a standing ovation with cheers when he told Jackson's children: "Wasn't nothing strange about your daddy. It was strange what your daddy had to deal with. But he dealt with it anyway."[329] Jackson's 11-year-old daughter Paris Katherine, speaking publicly for the first time, wept as she addressed the crowd.[330][331] Lucious Smith provided a closing prayer.[332] On September 3, 2009, the body of Jackson was entombed at Forest Lawn Memorial Park in Glendale, California.[333]

    Criminal investigation and prosecution of Conrad Murray
    Main article: People v. Murray
    In August 2009, the Los Angeles County Coroner ruled that Jackson's death was a homicide.[334][335] Law enforcement officials charged Murray with involuntary manslaughter on February 8, 2010.[336] In late 2011, he was found guilty of involuntary manslaughter[337] and held without bail to await sentencing.[338] Murray was sentenced to four years in prison.[339]

    Posthumous sales
    At the 2009 American Music Awards, Jackson won four posthumous awards, including two for his compilation album Number Ones, bringing his total American Music Awards to 26.[340][341] In the year after his death, more than 16.1 million copies of Jackson's albums were sold in the US alone, and 35 million copies were sold worldwide, more than any other artist in 2009.[342][343] He became the first artist to sell one million music downloads in a week, with 2.6 million song downloads. Thriller, Number Ones and The Essential Michael Jackson became the first catalog albums to outsell any new album.[344] Jackson also became the first artist to have four of the top-20 bestselling albums in a single year in the US.[345]

    Following the surge in sales, in March 2010, Sony Music signed a $250 million deal (equivalent to $350 million in 2023) with the Jackson estate to extend their distribution rights to Jackson's back catalog until at least 2017; it had been due to expire in 2015. It was the most expensive music contract for a single artist in history.[346][347] They agreed to release ten albums of previously unreleased material and new collections of released work.[346][348] The deal was extended in 2017.[349] That July, a Los Angeles court awarded Quincy Jones $9.4 million of disputed royalty payments for Off the Wall, Thriller, and Bad.[56] In July 2018, Sony/ATV bought the estate's stake in EMI for $287.5 million.[350]

    In 2014, Jackson became the first artist to have a top-ten single in the Billboard Hot 100 in five different decades.[351] The following year, Thriller became the first album to be certified for 30 million shipments by the Recording Industry Association of America (RIAA).[7] A year later, it was certified 33× platinum after Soundscan added streams and audio downloads to album certifications.[352][nb 4]

    In February 2024, Sony Music acquired half of Jackson's publishing rights and recording masters for an estimated $600 million. The deal includes assets from Jackson's Mijac publishing catalog, but excludes royalties from several Jackson-related productions, including the MJ Broadway musical and the Michael biopic. The deal is possibly the largest transaction ever for a single musician's work.[354][355]

    Posthumous releases and productions
    Jackson's posthumous releases and productions are administered by the estate of Michael Jackson, which owns Jackson's trademarks and rights to his name, image and likeness.[356] The first posthumous Jackson song, "This Is It", co-written in the 1980s with Paul Anka, was released in October 2009. The surviving Jackson brothers reunited to record backing vocals.[357] It was followed by a documentary film about the rehearsals for the canceled This Is It tour, Michael Jackson's This Is It,[358] and a compilation album.[359] Despite a limited two-week engagement, the film became the highest-grossing documentary or concert film ever, with earnings of more than $260 million worldwide.[360] Jackson's estate received 90% of the profits.[361] In late 2010, Sony released the first posthumous album, Michael, and the promotional single "Breaking News". The Jackson collaborator will.i.am expressed disgust, saying that Jackson would not have approved the release.[362]

    The video game developer Ubisoft released a music game featuring Jackson for the 2010 holiday season, Michael Jackson: The Experience. It was among the first games to use Kinect and PlayStation Move, the motion-detecting camera systems for Xbox 360 and PlayStation 3.[363] In April 2011, Mohamed Al-Fayed, the chairman of Fulham Football Club, unveiled a statue of Jackson outside the club stadium, Craven Cottage.[364] It was moved to the National Football Museum in Manchester in May 2014,[365] and removed from display in March 2019 following renewed sexual assault allegations.[366]

    In October 2011, the theater company Cirque du Soleil launched Michael Jackson: The Immortal World Tour, a $57-million production,[367] in Montreal, with a permanent show resident in Las Vegas.[368] A larger and more theatrical Cirque show, Michael Jackson: One, designed for residency at the Mandalay Bay resort in Las Vegas, opened on May 23, 2013, in a renovated theater.[369][370]

    In 2012, in an attempt to end a family dispute, Jackson's brother Jermaine retracted his signature on a public letter criticizing executors of Jackson's estate and his mother's advisors over the legitimacy of his brother's will.[371] T.J. Jackson, the son of Tito Jackson, was given co-guardianship of Michael Jackson's children after false reports of Katherine Jackson going missing.[372] Xscape, an album of unreleased material, was released on May 13, 2014.[373] The lead single, a duet between Jackson and Justin Timberlake, "Love Never Felt So Good", reached number 9 on the US Billboard Hot 100, making Jackson the first artist to have a top-10 single on the chart in five different decades.[374]

    Later in 2014, Queen released a duet recorded with Jackson in the 1980s.[70] A compilation album, Scream, was released on September 29, 2017.[375] A jukebox musical, MJ the Musical, premiered on Broadway in 2022.[376] Myles Frost won the 2022 Tony Award for Best Actor in a Musical for his portrayal of Jackson.[377] On November 18, 2022, a 40th-anniversary edition reissue of Thriller was released.[378][379]

    A biographical film based on Jackson's life, Michael, was due to enter production through Lionsgate in 2023, but it was put on hold amid the SAG-AFTRA strike.[380] It will be directed by Antoine Fuqua, produced by Graham King and written by John Logan.[381] Jackson will be played by Jaafar Jackson, son of Jackson's brother Jermaine. Deadline Hollywood reported that the film "will not shy away from the controversies of Jackson's life".[382]

    Posthumous child sexual abuse allegations
     Jackson and Safechuck (left) in Honolulu, Hawaii in 1988
    In 2013, choreographer Wade Robson filed a lawsuit alleging that Jackson had sexually abused him for seven years, beginning when he was seven years old (1989–1996).[383] In 2014, a case was filed by James Safechuck, alleging sexual abuse over a four-year period from the age of ten (1988–1992).[384][385][386] Both had testified in Jackson's defense during the 1993 allegations; Robson did so again in 2005.[387][388] In 2015, Robson's case against Jackson's estate was dismissed as it had been filed too late. Safechuck's claim was also time-barred.[389]

    In 2017, it was ruled that Jackson's corporations could not be held accountable for his alleged past actions.[390][391] The rulings were appealed. On October 20, 2020, Safechuck's lawsuit against Jackson's corporations was again dismissed. The judge ruled that there was no evidence that Safechuck had had a relationship with Jackson's corporation, nor was it proven that there was a special relationship between the two.[392][393][394][395] On April 26, 2021, Robson's case was dismissed because of a lack of supporting evidence that the defendants exercised control over Jackson.[396]

    Robson and Safechuck described their allegations against Jackson in graphic detail in the documentary Leaving Neverland, released in March 2019.[397] Radio stations in New Zealand, Canada, the UK and the Netherlands removed Jackson's music from their playlists.[398][399][400] Jackson's family condemned the film as a "public lynching",[401] and the Jackson estate released a statement calling the film a "tabloid character assassination [Jackson] endured in life, and now in death".[402] Close associates of Jackson, such as Corey Feldman, Aaron Carter, Brett Barnes, and Macaulay Culkin, said that Jackson had not molested them.[403][404][405]

    Documentaries such as Square One: Michael Jackson, Neverland Firsthand: Investigating the Michael Jackson Documentary and Michael Jackson: Chase the Truth, presented information countering the claims suggested by Leaving Neverland.[406][407][408] Jackson's album sales increased following the documentary screenings.[409] Billboard senior editor Gail Mitchell said she and a colleague interviewed about thirty music executives who believed Jackson's legacy could withstand the controversy.[410] In late 2019, some New Zealand and Canadian radio stations re-added Jackson's music to their playlists, citing "positive listener survey results".[411][412]

    On February 21, 2019, the Jackson estate sued HBO for breaching a non-disparagement clause from a 1992 contract. The suit sought to compel HBO to participate in a non-confidential arbitration that could result in $100 million or more in damages awarded to the estate.[413] HBO said they did not breach a contract and filed an anti-SLAPP motion against the estate. In September 2019, Judge George H. Wu denied HBO's motion to dismiss the case, allowing the Jackson estate to arbitrate.[414] HBO appealed, but in December 2020 the appeals court affirmed Wu's ruling.[415]

    In 2020, a state law passed in California which granted plaintiffs in child sex abuse cases an additional period to file lawsuits. In October 2020 and again in April 2021, the Los Angeles County Superior Court ruled that MJJ Productions Inc. and MJJ Ventures Inc. employees were not legally obligated to protect the two men from Jackson. In August 2023, California's Second District Court of Appeal overturned the ruling, and the case was approved to move forward to trial court.[416]

    Legacy
    Main article: Cultural impact of Michael Jackson
    See also: List of Michael Jackson records and achievements
    Jackson has been referred to as the "King of Pop" for having transformed the art of music videos and paving the way for modern pop music. For much of Jackson's career, he had an unparalleled worldwide influence over the younger generation.[417] His influence extended beyond the music industry; he impacted dance, led fashion trends, and raised awareness for global affairs.[418] Jackson's music and videos fostered racial diversity in MTV's roster and steered its focus from rock to pop music and R&B, shaping the channel into a form that proved enduring.[44]

    In songs such as "Man in the Mirror", "Black or White", "Heal the World", "Earth Song" and "They Don't Care About Us", Jackson's music emphasized racial integration and environmentalism and protested injustice.[419][420] He is recognized as the Most Successful Entertainer of All Time by Guinness World Records.[421][422] Jackson has also appeared on Rolling Stone's lists of the Greatest Singers of All Time.[423][424] He is considered one of the most significant cultural icons of the 20th century,[425] and his contributions to music, dance, and fashion, along with his publicized personal life, made him a global figure in popular culture for over four decades.[426][427][428]

    Trying to trace Michael Jackson's influence on the pop stars that followed him is like trying to trace the influence of oxygen and gravity. So vast, far-reaching and was his impact—particularly in the wake of Thriller's colossal and heretofore unmatched commercial success—that there weren't a whole lot of artists who weren't trying to mimic some of the Jackson formula.

    — J. Edward Keyes of Rolling Stone[429]
    Danyel Smith, chief content officer of Vibe Media Group and the editor-in-chief of Vibe, described Jackson as "the greatest star".[430] Steve Huey of AllMusic called him "an unstoppable juggernaut, possessed of all the skills to dominate the charts seemingly at will: an instantly identifiable voice, eye-popping dance moves, stunning musical versatility and loads of sheer star power".[10] BET said Jackson was "quite simply the greatest entertainer of all time" whose "sound, style, movement and legacy continues to inspire artists of all genres".[431]

     Jackson's Bad era wax figure at Madame Tussauds, London in 1992
    In 1984, Time pop critic Jay Cocks wrote that "Jackson is the biggest thing since the Beatles. He is the hottest single phenomenon since Elvis Presley. He just may be the most popular black singer ever." He described Jackson as a "star of records, radio, rock video. A one-man rescue team for the music business. A songwriter who sets the beat for a decade. A dancer with the fanciest feet on the street. A singer who cuts across all boundaries of taste and style, and color too."[91] In 2003, The Daily Telegraph writer Tom Utley described Jackson as "extremely important" and a "genius".[432] At Jackson's memorial service on July 7, 2009, Motown founder Berry Gordy called Jackson "the greatest entertainer that ever lived".[433][434] In a June 28, 2009 Baltimore Sun article, Jill Rosen wrote that Jackson's legacy influenced fields including sound, dance, fashion, music videos and celebrity.[435]

    Pop critic Robert Christgau wrote that Jackson's work from the 1970s to the early 1990s showed "immense originality, adaptability, and ambition" with "genius beats, hooks, arrangements, and vocals (though not lyrics)", music that "will stand forever as a reproach to the puritanical notion that pop music is slick or shallow and that's the end of it". During the 1990s, as Jackson lost control of his "troubling life", his music suffered and began to shape "an arc not merely of promise fulfilled and outlived, but of something approaching tragedy: a phenomenally ebullient child star tops himself like none before, only to transmute audibly into a lost weirdo".[436] In the 2000s, Christgau wrote: "Jackson's obsession with fame, his grotesque life magnified by his grotesque wealth, are such an offense to rock aesthetes that the fact that he's a great musician is now often forgotten".[437]

    Philanthropy and humanitarian work
    Main article: Philanthropy of Michael Jackson
     President Ronald Reagan rewarding Jackson in 1984 for his support of alcohol and drug abuse charities
    Jackson is widely regarded as having been a prolific philanthropist and humanitarian.[438][439][440][441] Jackson's early charitable work has been described by The Chronicle of Philanthropy as having "paved the way for the current surge in celebrity philanthropy",[442] and by the Los Angeles Times as having "set the standard for generosity for other entertainers".[438]

    By some estimates, he donated over $500 million, not accounting for inflation, to various charities over the course of his life.[438] In 1992, Jackson established his Heal the World Foundation, to which he donated several million dollars in revenue from his Dangerous World Tour.[443]

    Jackson's philanthropic activities went beyond just monetary donations. He also performed at benefit concerts, some of which he arranged. He gifted tickets for his regular concert performances to groups that assist underprivileged children. He visited sick children in hospitals around the world. He opened his own home for visits by underprivileged or sick children and provided special facilities and nurses if the children needed that level of care.

    Jackson donated valuable, personal and professional paraphernalia for numerous charity auctions. He received various awards and accolades for his philanthropic work, including two bestowed by presidents of the United States. The vast breadth of Jackson's philanthropic work has earned recognition in the Guinness World Records.[438][444][445]

    On May 14, 1984, President Ronald Reagan gave Jackson an award recognizing his support of alcohol and drug abuse charities,[446] and in recognition of his support for the Ad Council's and the National Highway Traffic Safety Administration's Drunk Driving Prevention campaign. Jackson allowed the campaign to use "Beat It" for its public service announcements.[447]

    Artistry
    Influences
    Jackson was influenced by musicians including James Brown, Little Richard, Jackie Wilson, Diana Ross, Fred Astaire, Sammy Davis Jr., Gene Kelly,[448] and David Ruffin.[449] Little Richard had a substantial influence on Jackson,[450] but Brown was his greatest inspiration; he later said that as a small child, his mother would wake him whenever Brown appeared on television. Jackson described being "mesmerized".[451]

    Jackson's vocal technique was influenced by Diana Ross; his use of the oooh interjection from a young age was something Ross had used on many of her songs with the Supremes.[452] She was a mother figure to him, and he often watched her rehearse.[453] He said he had learned a lot from watching how she moved and sang, and that she had encouraged him to have confidence in himself.[454]

    Choreographer David Winters, who met Jackson while choreographing the 1971 Diana Ross TV special Diana!, said that Jackson watched the musical West Side Story almost every week, and it was his favorite film; he paid tribute to it in "Beat It" and the "Bad" video.[455][456][457]

    Vocal style
    Jackson sang from childhood, and over time his voice and vocal style changed. Between 1971 and 1975, his voice descended from boy soprano to lyric tenor.[458] He was known for his vocal range.[423] With the arrival of Off the Wall in the late 1970s, Jackson's abilities as a vocalist were well regarded; Rolling Stone compared his vocals to the "breathless, dreamy stutter" of Stevie Wonder, and wrote that "Jackson's feathery-timbred tenor is extraordinarily beautiful. It slides smoothly into a startling falsetto that's used very daringly."[459] By the time of 1982's Thriller, Rolling Stone wrote that Jackson was singing in a "fully adult voice" that was "tinged by sadness".[460]

    The turn of the 1990s saw the release of the introspective album Dangerous. The New York Times noted that on some tracks, "he gulps for breath, his voice quivers with anxiety or drops to a desperate whisper, hissing through clenched teeth" and he had a "wretched tone". When singing of brotherhood or self-esteem the musician would return to "smooth" vocals.[461] Of Invincible, Rolling Stone wrote that, at 43, Jackson still performed "exquisitely voiced rhythm tracks and vibrating vocal harmonies".[462] Joseph Vogel notes Jackson's ability to use non-verbal sounds to express emotion.[463] Neil McCormick wrote that Jackson's unorthodox singing style "was original and utterly distinctive".[464]

    Musicianship
    Jackson had no formal music training and could not read or write music notation. He is credited for playing guitar, keyboard, and drums, but was not proficient in them.[465] When composing, he recorded ideas by beatboxing and imitating instruments vocally.[465] Describing the process, he said: "I'll just sing the bass part into the tape recorder. I'll take that bass lick and put the chords of the melody over the bass lick and that's what inspires the melody." The engineer Robert Hoffman recalled that after Jackson came in with a song he had written overnight, Jackson sang every note of every chord to a guitar player. Hoffman also remembered Jackson singing string arrangements part by part into a cassette recorder.[465]



    Dance
    Jackson danced from a young age as part of the Jackson 5,[466] and incorporated dance extensively in his performances and music videos.[466] According to Sanjoy Roy of The Guardian, Jackson would "flick and retract his limbs like switchblades, or snap out of a tornado spin into a perfectly poised toe-stand".[466] The moonwalk, taught to him by Jeffrey Daniel,[81] was Jackson's signature dance move and one of the most famous of the 20th century.[467] Jackson is credited for coining the name "moonwalk"; the move was previously known as the "backslide".[468][469] His other moves included the robot,[49] crotch grab, and the "anti-gravity" lean of the "Smooth Criminal" video.[466]

    Themes and genres
     Jackson during his Bad World Tour in Vienna, June 1988
    Jackson explored genres including pop,[10][470] soul,[10][157] rhythm and blues,[470] funk,[471] rock,[470][471] disco,[472] post-disco,[471] dance-pop[473] and new jack swing.[10] Steve Huey of AllMusic wrote that Thriller refined the strengths of Off the Wall; the dance and rock tracks were more aggressive, while the pop tunes and ballads were softer and more soulful.[10] Its tracks included the ballads "The Lady in My Life", "Human Nature", and "The Girl Is Mine",[474][460][475] the funk pieces "Billie Jean" and "Wanna Be Startin' Somethin'",[474][460] and the disco set "Baby Be Mine" and "P.Y.T. (Pretty Young Thing)".[475]

    With Off the Wall, Jackson's "vocabulary of grunts, squeals, hiccups, moans, and asides" vividly showed his maturation into an adult, Robert Christgau wrote in Christgau's Record Guide: Rock Albums of the Seventies (1981). The album's title track suggested to the critic a parallel between Jackson and Stevie Wonder's "oddball" music personas: "Since childhood his main contact with the real world has been on stage and in bed."[476] With Thriller, Christopher Connelly of Rolling Stone commented that Jackson developed his long association with the subliminal theme of paranoia and darker imagery.[460] AllMusic's Stephen Thomas Erlewine noted this on the songs "Billie Jean" and "Wanna Be Startin' Somethin'".[474] In "Billie Jean", Jackson depicts an obsessive fan who alleges he has fathered her child,[10] and in "Wanna Be Startin' Somethin'" he argues against gossip and the media.[460] "Beat It" decried gang violence in a homage to West Side Story, and was Jackson's first successful rock cross-over piece, according to Huey.[10][41] He observed that "Thriller" began Jackson's interest with the theme of the supernatural, a topic he revisited in subsequent years. In 1985, Jackson co-wrote the charity anthem "We Are the World"; humanitarian themes later became a recurring theme in his lyrics and public persona.[10]

     Jackson's Bad era jacket on display at the Hollywood Guinness World Records Museum
    In Bad, Jackson's concept of the predatory lover is seen on the rock song "Dirty Diana".[477] The lead single "I Just Can't Stop Loving You" is a traditional love ballad, and "Man in the Mirror" is a ballad of confession and resolution. "Smooth Criminal" is an evocation of bloody assault, rape and likely murder.[138] AllMusic's Stephen Thomas Erlewine states that Dangerous presents Jackson as a paradoxical person.[478] The first half of the record is dedicated to new jack swing, including songs like "Jam" and "Remember the Time". It was the first Jackson album in which social ills became a primary theme; "Why You Wanna Trip on Me", for example, protests world hunger, AIDS, homelessness and drugs. Dangerous contains sexually charged songs such as "In the Closet". The title track continues the theme of the predatory lover and compulsive desire. The second half includes introspective, pop-gospel anthems such as "Will You Be There", "Heal the World" and "Keep the Faith".[461] In the ballad "Gone Too Soon", Jackson gives tribute to Ryan White and the plight of those with AIDS.[479]

    HIStory creates an atmosphere of paranoia.[480] In the new jack swing-funk rock tracks "Scream" and "Tabloid Junkie", and the R&B ballad "You Are Not Alone", Jackson retaliates against the injustice and isolation he feels, and directs his anger at the media.[481] In the introspective ballad "Stranger in Moscow", Jackson laments his "fall from grace"; "Earth Song", "Childhood", "Little Susie" and "Smile" are operatic pop songs.[480][481] In "D.S.", Jackson attacks lawyer Thomas W. Sneddon Jr., who had prosecuted him in both child sexual abuse cases; he describes Sneddon as a white supremacist who wanted to "get my ass, dead or alive".[482] Invincible includes urban soul tracks such as "Cry" and "The Lost Children", ballads such as "Speechless", "Break of Dawn", and "Butterflies", and mixes hip hop, pop, and R&B in "2000 Watts", "Heartbreaker" and "Invincible".[483][484]

    Music videos and choreography
     Jackson (center) performing a dance sequence of "The Way You Make Me Feel" at the Bad World Tour in 1988
    Jackson released "Thriller", a 14-minute music video directed by John Landis, in 1983.[485] The zombie-themed video "defined music videos and broke racial barriers" on MTV, which had launched two years earlier.[44] Before Thriller, Jackson struggled to receive coverage on MTV, allegedly because he was African American.[486] Pressure from CBS Records persuaded MTV to start showing "Billie Jean" and later "Beat It", which led to a lengthy partnership with Jackson, and helped other black music artists gain recognition.[487] The popularity of his videos on MTV helped the relatively new channel's viewing figures, and MTV's focus shifted toward pop and R&B.[487][488] His performance on Motown 25: Yesterday, Today, Forever changed the scope of live stage shows, making it acceptable for artists to lip-sync to music video on stage.[489] The choreography in Thriller has been copied in Indian films and prisons in the Philippines.[490] Thriller marked an increase in scale for music videos, and was named the most successful music video ever by the Guinness World Records.[222]

    In "Bad"'s 19-minute video—directed by Martin Scorsese—Jackson used sexual imagery and choreography, and touched his chest, torso and crotch. When asked by Winfrey in the 1993 interview about why he grabbed his crotch, he said it was spontaneously compelled by the music. Time magazine described the "Bad" video as "infamous". It featured Wesley Snipes; Jackson's later videos often featured famous cameo roles.[491][492] For the "Smooth Criminal" video, Jackson experimented with leaning forward at a 45 degree angle, beyond the performer's center of gravity. To accomplish this live, Jackson and designers developed a special shoe to lock the performer's feet to the stage, allowing them to lean forward. They were granted U.S. patent 5,255,452 for the device.[493] The video for "Leave Me Alone" was not officially released in the US, but in 1989 was nominated for three Billboard Music Video Awards[494] and won a Golden Lion Award for its special effects. It won a Grammy for Best Music Video, Short Form.[63]

    He received the MTV Video Vanguard Award in 1988; in 2001 the award was renamed in his honor.[495] The "Black or White" video simultaneously premiered on November 14, 1991, in 27 countries with an estimated audience of 500 million people, the largest audience ever for a music video at the time.[172] Along with Jackson, it featured Macaulay Culkin, Peggy Lipton, and George Wendt. It helped introduce morphing to music videos.[496] It was controversial for scenes in which Jackson rubs his crotch, vandalizes cars, and throws a garbage can through a storefront. He apologized and removed the final scene of the video.[161]

    "In the Closet" featured Naomi Campbell in a courtship dance with Jackson.[497] "Remember the Time" was set in ancient Egypt, and featured Eddie Murphy, Iman, and Magic Johnson.[498] The video for "Scream", directed by Mark Romanek and production designer Tom Foden, gained a record 11 MTV Video Music Award Nominations, and won "Best Dance Video", "Best Choreography", and "Best Art Direction".[499] The song and its video are Jackson's response to being accused of child molestation in 1993.[500] A year later, it won a Grammy for Best Music Video, Short Form. It has been reported as the most expensive music video ever made, at $7 million;[501] Romanek has contradicted this.[502] The "Earth Song" video was nominated for the 1997 Grammy for Best Music Video, Short Form.[503]

    Michael Jackson's Ghosts, a short film written by Jackson and Stephen King and directed by Stan Winston, premiered at the 1996 Cannes Film Festival. At over 38 minutes long, it held the Guinness world record for the longest music video until 2013, when it was eclipsed by the video for the Pharrell Williams song "Happy".[504] The 2001 video for "You Rock My World" lasts over 13 minutes, was directed by Paul Hunter, and features Chris Tucker and Marlon Brando.[505] It won an NAACP Image Award for Outstanding Music Video in 2002.[506]

    In December 2009, the Library of Congress selected "Thriller" as the only music video to be preserved in the National Film Registry, as a work of "enduring importance to American culture".[507][508] Huey wrote that Jackson transformed the music video into an artform and a promotional tool through complex story lines, dance routines, special effects and famous cameos, while breaking down racial barriers.[10]

    Honors and awards
    See also: List of awards and nominations received by Michael Jackson
     The Thriller platinum certified record on display at the Hard Rock Cafe in Hollywood. As of 2017, it is certified 33× platinum.[352]
    Jackson is one of the best-selling music artists in history,[509] with sales estimated around 500 million records worldwide.[510][Note 2] He had 13 number-one singles in the US in his solo career—more than any other male artist in the Hot 100 era.[511] He was invited and honored by a president of the United States at the White House three times. In 1984, he was honored with a "Presidential Public Safety Commendation" award by Ronald Reagan for his humanitarian endeavors.[512] In 1990, he was honored as the "Artist of the Decade" by George H. W. Bush.[513] In 1992, he was honored as a "Point of Light Ambassador" by Bush for inviting disadvantaged children to his Neverland Ranch.[514]

    Jackson won hundreds of awards, making him one of the most-awarded artists in popular music.[515] His awards include 39 Guinness World Records, including the Most Successful Entertainer of All Time,[421][422] 13 Grammy Awards,[516] as well as the Grammy Legend Award[517] and the Grammy Lifetime Achievement Award,[518] and 26 American Music Awards, including the Artist of the Century and Artist of the 1980s.[244] He also received the World Music Awards' Best-Selling Pop Male Artist of the Millennium and the Bambi Pop Artist of the Millennium Award.[519] Jackson was inducted onto the Hollywood Walk of Fame in 1980 as a member of the Jacksons, and in 1984 as a solo artist. He was inducted to the Rock and Roll Hall of Fame and Vocal Group Hall of Fame as a member of the Jackson 5 in 1997 and 1999,[520] respectively, and again as a solo artist in 2001.[521] In 2002, he was added to the Songwriters Hall of Fame.[522] In 2010, he was the first recording artist to be inducted into the Dance Hall of Fame,[523] and in 2014, he was posthumously inducted into the Rhythm and Blues Music Hall of Fame.[524] In 2021, he was among the inaugural inductees into the Black Music & Entertainment Walk of Fame.[525]

    In 1988, Fisk University honored him with an Honorary Doctorate of Humane Letters.[526] In 1992, he was invested as a titular king of Sanwi, a traditional kingdom located in the south-east of Ivory Coast.[527] In July 2009, the Lunar Republic Society named a crater on the Moon after Jackson.[528] In August, for what would have been Jackson's 51st birthday, Google dedicated their Google Doodle to him.[529] In 2012, the extinct hermit crab Mesoparapylocheles michaeljacksoni was named in his honor.[530] In 2014, the British Council of Cultural Relations deemed Jackson's life one of the 80 most important cultural moments of the 20th century.[531] World Vitiligo Day has been celebrated on June 25, the anniversary of Jackson's death, to raise awareness of the auto-immune disorder that Jackson suffered from.[532]

    Earnings
    Main article: Estate of Michael Jackson
    In 1989, Jackson's annual earnings from album sales, endorsements, and concerts were estimated at $125 million.[222] Forbes placed Jackson's annual income at $35 million in 1996 and $20 million in 1997.[533] Estimates of Jackson's net worth during his life range from negative $285 million to positive $350 million for 2002, 2003 and 2007.[534][535] Forbes reported in August 2018 that Jackson's total career pretax earnings in life and death were $4.2 billion.[536][537] Sales of his recordings through Sony's music unit earned him an estimated $300 million in royalties. He may have earned another $400 million from concerts, music publishing (including his share of the Beatles catalog), endorsements, merchandising and music videos.[538]

    In 2013, the executors of Jackson's estate filed a petition in the United States Tax Court as a result of a dispute with the Internal Revenue Service (IRS) over US federal estate taxes.[539] The executors claim that it was worth about $7 million, the IRS that it was worth over $1.1 billion. In February 2014, the IRS reported that Jackson's estate owed $702 million; $505 million in taxes, and $197 million in penalties.[540] A trial was held from February 6 to 24, 2017.[541] In 2021, the Tax Court issued a ruling in favor of the estate, ruling that the estate's total combined value of the estate was $111.5 million and that the value of Jackson's name and likeness was $4 million (not the $61 million estimated by the IRS's outside expert witness).[542]

    In 2016, Forbes estimated annual gross earnings by the Jackson Estate at $825 million, the largest ever recorded for a celebrity, mostly due to the sale of the Sony/ATV catalog.[543] In 2018, the figure was $400 million.[544] It was the eighth year since his death that Jackson's annual earnings were reported to be over $100 million, thus bringing Jackson's postmortem total to $2.4 billion.[545] Forbes has consistently recognized Jackson as one of the top-earning dead celebrities since his death, and placed him at the top spot from 2013 to 2023.[546][547]

    Discography
    Main articles: Michael Jackson albums discography, Michael Jackson singles discography, and List of songs recorded by Michael Jackson
    See also: The Jackson 5 discography
    Got to Be There (1972)
    Ben (1972)
    Music & Me (1973)
    Forever, Michael (1975)
    Off the Wall (1979)
    Thriller (1982)
    Bad (1987)
    Dangerous (1991)
    HIStory: Past, Present and Future, Book I (1995)
    Invincible (2001)
    Filmography
    See also: Michael Jackson videography
    The Wiz (1978)
    Michael Jackson's Thriller (1983)
    Captain EO (1986)
    Moonwalker (1988)
    Michael Jackson's Ghosts (1997)
    Men in Black II (2002)
    Miss Cast Away and the Island Girls (2004)
    Michael Jackson's This Is It (2009)
    Bad 25 (2012)
    Michael Jackson's Journey from Motown to Off the Wall (2016)
    Thriller 40 (2023)
    Tours
    Main article: List of Michael Jackson concerts
    Bad World Tour (1987–1989)
    Dangerous World Tour (1992–1993)
    HIStory World Tour (1996–1997)
    MJ & Friends (1999)
    See also
    List of dancers
    Notes
    ^ "I Just Can't Stop Loving You", "Bad", "The Way You Make Me Feel", "Man in the Mirror", and "Dirty Diana"
    ^ In 2006, Raymone Bain, Jackson's publicist at that time, claimed that Michael Jackson had sold over 750 million units.[1][2] Since 2006, several sources such as Billboard or Reuters claimed that Michael Jackson had sold around 750 million records;[3][4] while others such as MTV or CBS News claimed that his sales were over 750 million albums.[5][6] In 2009, The Wall Street Journal disputed the 750 million figure (if it referred to albums, instead of units).[2] Later, in 2015, the Recording Industry Association of America (RIAA) stated that Michael Jackson had sold 1 billion records worldwide.[7][8]
    ^ Blanket changed his name to "Bigi" in 2015.
    ^ In 2018, its US sales record was overtaken by the Eagles' album Greatest Hits 1971–75, with 38× platinum.[353]
     
    References
    Citations
    ^ Bain, Raymone K. (October 31, 2006). "Statement from Raymone Bain to all fans and fanclubs". Mjtmc.com. Archived from the original on February 17, 2007.
    ^ Jump up to:a b Bialik, Carl (July 15, 2009). "Spun: The Off-the-Wall Accounting of Record Sales". The Wall Street Journal. Archived from the original on March 10, 2015. Retrieved December 17, 2021.
    ^ "Michael Jackson's Partial Comeback Is No Thriller". Billboard. November 16, 2006. Archived from the original on December 17, 2021. Retrieved December 17, 2021.
    ^ "Factbox: The life and death of pop star Michael Jackson" (Press release). Reuters. September 6, 2011. Archived from the original on December 17, 2021. Retrieved December 17, 2021.
    ^ Ditzian, Eric (June 26, 2009). "Michael Jackson's Groundbreaking Career, by the Numbers". MTV. Archived from the original on December 30, 2021. Retrieved December 17, 2021.
    ^ "Michael Jackson Opens Up". CBS News. November 6, 2007. Archived from the original on December 17, 2021. Retrieved December 17, 2021.
    ^ Jump up to:a b "Michael Jackson's 'Thriller' First Ever 30X Multi-Platinum RIAA Certification". Recording Industry Association of America. December 16, 2015. Archived from the original on January 28, 2016. Retrieved December 17, 2021.
    ^ Adamczyk, Alicia (December 16, 2015). "Michael Jackson's 'Thriller' Just Smashed Another Record". Money. Archived from the original on May 8, 2021. Retrieved May 29, 2016.
    ^ County of Los Angeles Department of Health Services (2009). Michael Jackson death certificate.
    ^ Jump up to:a b c d e f g h i j k Huey, Steve. "Michael Jackson – Artist Biography". AllMusic. Archived from the original on May 7, 2015. Retrieved May 31, 2015.
    ^ Jump up to:a b Barnes, Brokes (June 25, 2009). "A Star Idolized and Haunted, Michael Jackson Dies at 50". The New York Times. Archived from the original on December 8, 2022. Retrieved July 12, 2009.
    ^ "Michael Jackson: 10 Achievements That Made Him The King of Pop". National Academy of Recording Arts and Sciences. June 24, 2014. Archived from the original on February 15, 2017. Retrieved October 20, 2016.
    ^ Jackson 2009, p. 26.
    ^ Young 2009, p. 18.
    ^ Young 2009, pp. 17, 19.
    ^ Jump up to:a b Petridis, Alexis (June 27, 2018). "Joe Jackson was one of the most monstrous fathers in pop". The Guardian. Archived from the original on December 8, 2022. Retrieved April 18, 2019.
    ^ Jump up to:a b Sweeting, Adam (June 27, 2018). "Joe Jackson obituary". The Guardian. Archived from the original on December 8, 2022. Retrieved April 14, 2019.
    ^ Young 2009, pp. 18–19.
    ^ Knopper 2016, p. 6. Note: No tribal affiliation named in source.
    ^ Morris, Chris (June 27, 2018). "Joe Jackson, Jackson Family Patriarch, Dies at 89". Variety. Archived from the original on November 8, 2022. Retrieved April 27, 2019.
    ^ "Michael Jackson: a life of highs and lows". The Daily Telegraph. June 26, 2009. Archived from the original on January 10, 2022. Retrieved November 28, 2019.
    ^ Jackson, Jermaine (2011). You Are Not Alone: Michael: Through a Brother's Eyes. Simon & Schuster. p. 41. ISBN 978-1-4516-5156-0. Archived from the original on July 28, 2023. Retrieved November 28, 2019.
    ^ Jump up to:a b "Jackson interview seen by 14 m". BBC News. February 4, 2003. Archived from the original on December 8, 2022. Retrieved May 31, 2015.
    ^ Jump up to:a b c Lewis Jones 2005, pp. 165–168.
    ^ "Can Michael Jackson's demons be explained?". BBC News. June 27, 2009. Archived from the original on September 28, 2022. Retrieved May 31, 2015.
    ^ Katherine Jackson: Michael's strict upbringing not abuse (video). CNN. May 15, 2012. Archived from the original on November 14, 2021. Retrieved May 31, 2015.
    ^ Duke, Alan (July 21, 2009). "Joe Jackson denies abusing Michael". CNN. Archived from the original on June 12, 2015. Retrieved May 31, 2015.
    ^ "Jackson Brothers: Was Joe Jackson Abusive?". Yahoo! Celebrity. Archived from the original on May 22, 2015. Retrieved May 31, 2015.
    ^ Young 2009, p. 24.
    ^ Burton, Charlie (February 7, 2018). "Inside the Jackson machine". GQ. Archived from the original on October 7, 2022. Retrieved April 14, 2019.
    ^ Taraborrelli 2009, pp. 13–14.
    ^ Young 2009, pp. 21–22.
    ^ "Triumph & Tragedy: The Life of Michael Jackson". Rolling Stone India. August 25, 2009. Archived from the original on December 8, 2022. Retrieved May 31, 2015.
    ^ Young 2009, p. 22.
    ^ Aletti, Vince (November 26, 1970). "Jackson Five: The Biggest Thing Since the Stones". Rolling Stone. Archived from the original on November 5, 2021. Retrieved March 27, 2020.
    ^ Young 2009, p. 21.
    ^ Knopper, Steve (July 23, 2017). "Bobby Taylor, Motown Singer Who Discovered Jackson 5, Dead at 83". Rolling Stone. Archived from the original on December 8, 2022. Retrieved July 1, 2019.
    ^ Taraborrelli 2009, pp. 59–69.
    ^ Harper, Phillip Brian (Winter 1989). "Synesthesia, "Crossover," and Blacks in Popular Music". Social Text (23): 110. doi:10.2307/466423. JSTOR 466423.
    ^ Easlea, Daryl (2016). Michael Jackson: Rewind: The Life and Legacy of Pop Music's King. Race Point Publishing. p. 178. ISBN 978-1-63106-253-7.
    ^ Jump up to:a b "Michael Jackson – Biography". Rolling Stone. Archived from the original on April 2, 2008.
    ^ Bronson, Fred (November 15, 2017). "48 Years Ago Today, 'I Want You Back' Kicked It All Off for the Jackson 5". Billboard. Archived from the original on April 10, 2019. Retrieved April 6, 2019.
    ^ Taraborrelli 2009, pp. 81–82.
    ^ Jump up to:a b c d e Young 2009, p. 25.
    ^ Jump up to:a b McNulty, Bernadette (June 26, 2009). "Michael Jackson's music: the solo albums". The Daily Telegraph. Archived from the original on January 10, 2022. Retrieved May 31, 2015.
    ^ Taraborrelli 2009, pp. 98–99.
    ^ Alban, Debra (June 28, 2009). "Michael Jackson broke down racial barriers" (Press release). CNN. Archived from the original on December 21, 2014. Retrieved May 31, 2015.
    ^ Brown, Helen (June 26, 2009). "Michael Jackson and Motown: the boy behind the marketing". The Daily Telegraph. Archived from the original on January 10, 2022. Retrieved April 14, 2019.
    ^ Jump up to:a b Mansour 2005, p. 403: 'The Robot was a mimelike dance, popularized by The Jackson 5 and their Top Ten hit "Dancing Machine"'
    ^ Huey, Steve. "The Jackson 5 – Artist Biography". AllMusic. Archived from the original on June 14, 2020. Retrieved April 8, 2019.
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    Print sources
    Boepple, Leanne (1995). "Scream: Space Odyssey, Jackson-Style. (video production; Michael and Janet Jackson video)". TCI: Theatre Crafts International. 29. Theatre Crafts International. ISSN 1063-9497.
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    Bronson, Fred (2003). Billboard's Hottest Hot 100 Hits (3rd ed.). Billboard Books. ISBN 978-0-8230-7738-0.
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    Palmer, Robert (1995). Rock & Roll: An Unruly History. Harmony Books. ISBN 978-0-517-70050-1.
    Parameswaran, Radhika (2011). "E-Race-ing Color: Gender and Transnational Visual Economies of Beauty in India". In Sarma Hegde, Radha (ed.). Circuits of Visibility: Gender and Transnational Media Cultures. NYU Press. ISBN 978-0-8147-9060-1.
    Ramage, John D.; Bean, John C.; Johnson, June (2001). Writing arguments: a rhetoric with readings. Allyn and Bacon. ISBN 978-0-205-31745-5.
    Rojek, Chris (2007). Cultural Studies. Polity. ISBN 978-0-7456-3683-2.
    Tannenbaum, Rob; Marks, Craig (2011). I Want My MTV: The Uncensored Story of the Music Video Revolution. Penguin Books. ISBN 978-1-101-52641-5.
    Taraborrelli, J. Randy (2009). Michael Jackson: The Magic, The Madness, The Whole Story, 1958–2009. Grand Central Publishing, 2009. ISBN 978-0-446-56474-8.
    Vogel, Joseph (2012). Man in the Music: The Creative Life and Work of Michael Jackson. New York: Sterling. ISBN 978-1-4027-7938-1.
    Young, Julie (Fall 2009). "A Hoosier Thriller: Gary, Indiana's Michael Jackson". Traces of Indiana and Midwestern History. 21 (4). Indianapolis: Indiana Historical Society. Archived from the original on April 15, 2014. Retrieved April 14, 2014.
    Further reading
    Hidalgo, Susan; Weiner, Robert G. (2010). "Wanna Be Startin' Somethin': MJ in the Scholarly Literature: A Selected Bibliographic Guide" (PDF). The Journal of Pan African Studies. 3 (7).
    How Michael Jackson Changed Dance History – biography.com
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    From Wikipedia, the free encyclopedia

    For other events on the same date, see September 11 attacks (disambiguation).
    "9/11" redirects here. For the calendar dates, see September 11 and November 9. For the reverse, see 11/9 (disambiguation).
    September 11 attacks
    Part of terrorism in the United States
     
    United Airlines Flight 175 hits the South Tower
     
    Flight 77 hits The Pentagon
     
    Fuselage of Flight 93 in Stonycreek Township
     
    View of the collapsing North Tower
     
    Collapse of the 7 WTC
     
    World Trade Center site after the attacks
     
    The Pentagon building on fire
    Location
    Lower Manhattan, New York
    Arlington County, Virginia
    Stonycreek Township, Pennsylvania
    [a]
    Date
    September 11, 2001; 22 years ago
    c. 08:13 a.m.[b] – 10:03 a.m.[c] (EDT)
    Target
    North Tower
    (AA 11)
    South Tower
    (UA 175)
    The Pentagon
    (AA 77)
    U.S. Capitol Building or the White House
    (UA 93; unsuccessful due to passenger revolt)
    Attack type
    Islamic terrorism, aircraft hijacking, suicide attack, mass murder
    Deaths
    2,996
    (2,977 victims + 19 Al-Qaeda terrorists)
    Injured
    6,000–25,000+[d]
    Perpetrators
    Al-Qaeda led by Osama bin Laden (see also: responsibility)
    No. of participants
    19
    Motive
    Several; see Motives for the September 11 attacks and Fatawā of Osama bin Laden
    Convicted
    Zacarias Moussaoui
    Imad Yarkas
    Mounir el-Motassadeq (see also: Trials related to the September 11 attacks)
    September 11 attacks
     
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    e
    al-Qaeda attacks
    The September 11 attacks, commonly known as 9/11,[e] were four coordinated Islamist suicide terrorist attacks carried out by Al-Qaeda against the United States on September 11, 2001. That morning, 19 terrorists hijacked four commercial airliners scheduled to travel from the East Coast to California. The hijackers crashed the first two planes into the Twin Towers of the World Trade Center in New York City, two of the world's five tallest buildings at the time, and aimed the next two flights toward targets in or near Washington, D.C., in an attack on the nation's capital. The third team succeeded in striking the Pentagon, the headquarters of the U.S. Department of Defense in Arlington County, Virginia, while the fourth plane crashed in rural Pennsylvania during a passenger revolt. The September 11 attacks killed 2,977 people, making them the deadliest terrorist attack in history, and instigated the multi-decade global war on terror, fought in Afghanistan, Iraq, and elsewhere.

    The first impact was that of American Airlines Flight 11, which ringleader Mohamed Atta flew into the North Tower of the World Trade Center complex in Lower Manhattan at 8:46 a.m.[f] Seventeen minutes later, at 9:03,[g] the World Trade Center's South Tower was hit by United Airlines Flight 175. Both 110-story skyscrapers collapsed within an hour and forty-one minutes,[h] bringing about the destruction of the remaining five structures in the WTC complex and damaging or destroying nearby buildings. A third flight, American Airlines Flight 77, crashed into the Pentagon at 9:37 a.m., causing a partial collapse. The fourth and final flight, United Airlines Flight 93, flew in the direction of the capital. Alerted to the previous attacks, the passengers fought for control, forcing the hijackers to nosedive the plane into a Stonycreek Township field, near Shanksville, at 10:03 a.m. Investigators determined that Flight 93's target was either the United States Capitol or the White House.

    That evening, the Central Intelligence Agency informed President George W. Bush that its Counterterrorism Center had identified the attacks as having been the work of Al-Qaeda under Osama bin Laden's leadership. The United States formally responded by launching the war on terror and invading Afghanistan to depose the Taliban, which rejected the conditions of U.S. terms to expel Al-Qaeda from Afghanistan and extradite its leaders. The U.S.'s invocation of Article 5 of the North Atlantic Treaty—its only usage to date—called upon allies to fight Al-Qaeda. As U.S. and NATO invasion forces swept through Afghanistan, bin Laden eluded them by disappearing into the White Mountains. He denied any involvement until 2004, when excerpts of a taped statement in which he accepted responsibility for the attacks were released. Al-Qaeda's cited motivations included U.S. support of Israel, the presence of U.S. military bases in Saudi Arabia and sanctions against Iraq. The nearly decade-long manhunt for bin Laden concluded on May 2, 2011, when he was killed during a U.S. military raid after being tracked down to his compound in Abbottabad, Pakistan. The war in Afghanistan continued for another eight years until the agreement was made in February 2020 for American and NATO troops to withdraw from the country, and the last members of the U.S. armed forces left the region on August 30, 2021, after which the Taliban returned to power. Ayman al-Zawahiri, another planner of the attacks who succeeded bin Laden as leader of Al-Qaeda, was killed by U.S. drone strikes in Kabul, Afghanistan on July 31, 2022.[14]

    Excluding the hijackers, the attacks killed 2,977 people, injured thousands more and gave rise to substantial long-term health consequences while also causing at least $10 billion in infrastructure and property damage. It remains the deadliest terrorist attack in history as well as the deadliest incident for firefighters and law enforcement personnel in US history, killing 343 and 72 members, respectively. The loss of life stemming from the impact of Flight 11 secured its place as the most lethal plane crash in aviation history followed by the death toll incurred by Flight 175. The destruction of the World Trade Center and its environs seriously harmed the U.S. economy and induced global market shocks. Many other countries strengthened anti-terrorism legislation and expanded their powers of law enforcement and intelligence agencies. Cleanup of the World Trade Center site (colloquially "Ground Zero") took eight months and was completed in May 2002, while the Pentagon was repaired within a year. After delays in the design of a replacement complex, construction of the One World Trade Center began in November 2006; it opened in November 2014. Memorials to the attacks include the National September 11 Memorial & Museum in New York City, The Pentagon Memorial in Arlington County, Virginia, and the Flight 93 National Memorial at the Pennsylvania crash site.

    Background
    Further information: Fatawā of Osama bin Laden and Political views of Osama bin Laden
    Al-Qaeda
    Main article: Al-Qaeda
    Further information: Jihad
    Al-Qaeda's origins can be traced to 1979, when the Soviet Union invaded Afghanistan.[15] Soon after the invasion, Osama bin Laden traveled to Afghanistan and helped organize Arab mujahideen (the "Afghan Arabs") to resist the "Communist invaders" (Soviets) until their exit from the country in 1989.[16][17] In 1984, bin Laden, along with Islamic scholar Abdullah Azzam, formed the Maktab al-Khidamat (MAK), an organization to support Arab mujahideen who came to join the jihad in Afghanistan.[15][18]

    The U.S. Central Intelligence Agency (CIA) funnelled several billion dollars worth of weapons to the indigenous Afghan mujahideen resistance, a portion of which bled to the Arab volunteers.[19] However, no direct evidence of U.S. aid to bin Laden or any of his affiliates was ever uncovered.[20]

    In 1996, bin Laden issued his first fatwā, which declared war against the United States and demanded the expulsion of all American soldiers from the Arabian Peninsula.[21] In a second 1998 fatwā, bin Laden outlined his objections to American foreign policy with respect to the State of Israel, as well as the continued presence of American troops in Saudi Arabia after the Gulf War.[22] Bin Laden maintained that Muslims are obliged to attack American targets until the aggressive policies of the U.S. against Muslims were reversed. According to bin Laden, Islamic jurists had "throughout Islamic history unanimously agreed that the jihad is an individual duty if the enemy destroys the Muslim countries".[22][23]

    The Hamburg cell in Germany included Islamists who eventually came to be key operatives in the 9/11 attacks.[24] Mohamed Atta; Marwan al-Shehhi; Ziad Jarrah; Ramzi bin al-Shibh; and Said Bahaji were all members of Al-Qaeda's Hamburg cell.[25] Bin Laden asserted that all Muslims must wage a defensive war against the United States, and combat American aggression. He further argued that military strikes against American assets would send a message to the American people, attempting to force the U.S. to re-evaluate its support to Israel, and other aggressive policies.[26] In a 1998 interview with American journalist John Miller, bin Laden stated:

    [W]e tell the Americans as people and we tell the mothers of soldiers and American mothers in general that if they value their lives and the lives of their children, to find a nationalistic government that will look after their interests and not the interests of the Jews. The continuation of tyranny will bring the fight to America, as [the 1993 World Trade Center bomber] Ramzi [Yousef] yourself and others did. This is my message to the American people: to look for a serious government that looks out for their interests and does not attack others, their lands, or their honour. My word to American journalists is not to ask why we did that but to ask what their government has done that forced us to defend ourselves.

    — Osama bin Laden, in his interview with John Miller, May 1998, [27]
    Osama bin Laden
    Main article: Osama bin Laden
    Further information: Militant career of Osama bin Laden
     Osama bin Laden in 1997–1998
    Bin Laden orchestrated the September 11 attacks. He initially denied involvement, but later recanted his denial.[28][29][30] Al Jazeera broadcast a statement by him on September 16, 2001: "I stress that I have not carried out this act, which appears to have been carried out by individuals with their own motivation".[31] In November 2001, U.S. forces recovered a videotape from a destroyed house in Jalalabad, Afghanistan. In the video, bin Laden, talking to Khaled al-Harbi, admitted foreknowledge of the attacks.[32] On December 27, 2001, a second video of bin Laden was released in which he, stopping short of admitting responsibility for the attacks, said:[33]

    It has become clear that the West in general and America in particular have an unspeakable hatred for Islam. ... It is the hatred of crusaders. Terrorism against America deserves to be praised because it was a response to injustice, aimed at forcing America to stop its support for Israel, which kills our people. ... We say that the end of the United States is imminent, whether Bin Laden or his followers are alive or dead, for the awakening of the Muslim ummah [nation] has occurred. ... It is important to hit the economy (of the United States), which is the base of its military power...If the economy is hit they will become reoccupied.

    — Osama bin Laden
    Shortly before the 2004 U.S. presidential election, bin Laden used a taped statement to publicly acknowledge Al-Qaeda's involvement in the attacks.[28] He admitted his direct link to the attacks and said they were carried out because:

    The events that affected my soul in a direct way started in 1982 when America permitted the Israelis to invade Lebanon and the American Sixth Fleet helped them in that. This bombardment began and many were killed and injured and others were terrorised and displaced.

    I couldn't forget those moving scenes, blood and severed limbs, women and children sprawled everywhere. Houses were destroyed along with their occupants high rises demolished over their residents, rockets raining down on our home without mercy...As I looked at those demolished towers in Lebanon, it entered my mind that we should punish the oppressor in kind and that we should destroy towers in America so that they taste some of what we tasted and so that they be deterred from killing our women and children.

    And that day, it was confirmed to me that oppression and the intentional killing of innocent women and children is a deliberate American policy. Destruction is freedom and democracy, while resistance is terrorism and intolerance.[34]
    Bin Laden personally directed his followers to attack the World Trade Center and the Pentagon.[35][36] Another video obtained by Al Jazeera in September 2006 showed bin Laden with one of the attacks' chief planners, Ramzi bin al-Shibh, as well as hijackers, Hamza al-Ghamdi and Wail al-Shehri, amidst making preparations for the attacks.[37] Bin Laden had been on the FBI's Most Wanted List since 1998 for the 1998 bombings of the U.S. embassies in Tanzania and Kenya.[38][39]

    Khalid Sheikh Mohammed and other Al-Qaeda members
    Main article: Khalid Sheikh Mohammed
     Khalid Sheikh Mohammed after his 2003 capture in Rawalpindi, Pakistan
    Journalist Yosri Fouda of the Arabic television channel Al Jazeera reported that in April 2002 Al-Qaeda member Khalid Sheikh Mohammed admitted his involvement in the attacks, along with Ramzi bin al-Shibh.[40][41][42] The 2004 9/11 Commission Report determined that Mohammed's animosity towards the United States, the principal architect of the 9/11 attacks, stemmed from his "violent disagreement with U.S. foreign policy favoring Israel".[43] Mohammed was also an adviser and financier of the 1993 World Trade Center bombing and the uncle of Ramzi Yousef, the lead bomber in that attack.[44][45] In late 1994, Mohammed and Yousef moved on to plan a new terrorist attack called the Bojinka plot planned for January 1995. Despite a failure and Yousef's capture by U.S. forces the following month, the Bojinka plot would influence the later 9/11 attacks.[46]

    In "Substitution for Testimony of Khalid Sheikh Mohammed" from the trial of Zacarias Moussaoui, five people are identified as having been completely aware of the operation's details. They are bin Laden; Khalid Sheikh Mohammed; Ramzi bin al-Shibh; Abu Turab al-Urduni; and Mohammed Atef.[47]

    Motives
    Main article: Motives for the September 11 attacks
    Further information: Fatwa of Osama bin Laden
    Osama bin Laden's declaration of a holy war against the United States, and a 1998 fatwā signed by bin Laden and others that called for the killing of Americans,[22][48] are seen by investigators as evidence of his motivation.[49] During his interview with Hamid Mir in November 2001, Bin Laden defended the September 11 attacks as retaliatory strikes against American atrocities against Muslims across the world. He also maintained that the attacks were not directed against women and children, asserting that the targets of the strikes were symbols of America's "economic and military power".[50][51]

    In bin Laden's November 2002 "Letter to the American people", he explicitly stated that al-Qaeda's motives for the attacks included:

    U.S. support of Israel[52][53]
    Bin Laden's strategy to support and globally expand the Al-Aqsa Intifada[54][55][56][57]
    Attacks against Muslims by U.S.-led coalition in Somalia
    U.S. support of the government of Philippines against Muslims in the Moro conflict
    U.S. support for the Israeli occupation of Southern Lebanon
    U.S. support of Russian atrocities against Muslims in Chechnya
    Pro-American governments in the Middle East (who "act as your agents") being against Muslim interests
    U.S. support of Indian oppression against Muslims in Kashmir
    The presence of U.S. troops in Saudi Arabia[58]
    The sanctions against Iraq[52]
    Environmental destruction[59][60][61]
    After the attacks, bin Laden and Ayman al-Zawahiri released additional videotapes and audio recordings, some of which repeated the above reasons for the attacks. Two relevant publications were bin Laden's 2002 "Letter to the American people"[62] and a 2004 videotape by bin Laden.[63]

    [...] those young men, for whom God has cleared the way, didn't set out to kill children, but rather attacked the biggest centre of military power in the world, the Pentagon, which contains more than 64,000 workers, a military base which has a big concentration of army and intelligence ... As for the World Trade Center, the ones who were attacked and who died in it were part of a financial power. It wasn't a children's school! Neither was it a residence. The consensus is that most of the people who were in the towers were men who backed the biggest financial force in the world, which spreads mischief throughout the world.
    — Osama Bin Laden's interview with Tayseer Allouni, 21 October 2001[64]
    As an adherent of Islam, bin Laden believed that non-Muslims are forbidden from having a permanent presence in the Arabian Peninsula.[65] In 1996, bin Laden issued a fatwā calling for American troops to leave Saudi Arabia. In 1998, Al-Qaeda wrote "For over seven years the United States has been occupying the lands of Islam in the holiest of places, the Arabian Peninsula, plundering its riches, dictating to its rulers, humiliating its people, terrorizing its neighbours, and turning its bases in the Peninsula into a spearhead through which to fight the neighbouring Muslim peoples".[66]

    In a December 1999 interview, bin Laden said he felt that Americans were "too near to Mecca", and considered this a provocation to the entire Muslim world.[67] One analysis of suicide terrorism suggested that without U.S. troops in Saudi Arabia, Al-Qaeda likely would not have been able to get people to commit to suicide missions.[68]

    In the 1998 fatwā, Al-Qaeda identified the Iraq sanctions as a reason to kill Americans, condemning the "protracted blockade" among other actions that constitute a declaration of war against "Allah, his messenger, and Muslims".[66] The fatwā declared that "the ruling to kill the Americans and their allies – civilians and military – is an individual duty for every Muslim who can do it in any country in which it is possible to do it, in order to liberate the al-Aqsa Mosque and the holy mosque of Mecca from their grip, and in order for their [the Americans'] armies to move out of all the lands of Islam, defeated and unable to threaten any Muslim".[22][69]

    In 2004, bin Laden claimed that the idea of destroying the towers had first occurred to him in 1982 when he witnessed Israel's bombardment of high-rise apartment buildings during the 1982 Lebanon War.[70][71] Some analysts, including political scientists John Mearsheimer and Stephen Walt, also claimed that U.S. support of Israel was a motive for the attacks.[53][67] In 2004 and 2010, bin Laden again connected the September 11 attacks with U.S. support of Israel, although most of the letters expressed bin Laden's disdain for President Bush and bin Laden's hope to "destroy and bankrupt" the U.S.[72][73]

    Other motives have been suggested in addition to those stated by bin Laden and Al-Qaeda. Some authors suggested the "humiliation" that resulted from the Islamic world falling behind the Western world – this discrepancy was rendered especially visible by globalization[74][75] and a desire to provoke the U.S. into a broader war against the Islamic world in the hope of motivating more allies to support Al-Qaeda. Similarly, others have argued the 9/11 attacks were a strategic move to provoke America into a war that would incite a pan-Islamic revolution.[76][77]

    Documents seized during the 2011 operation that killed bin Laden included a few notes handwritten by bin Laden in September 2002 with the heading "The Birth of the Idea of September 11". In these notes, he describes how he was inspired by the crash of EgyptAir Flight 990 on October 31, 1999, which was deliberately crashed by co-pilot Gameel Al-Batouti. "This is how the idea of 9/11 was conceived and developed in my head, and that is when we began the planning" bin Laden continued, adding that no one but Abu Hafs and Abu al-Khair knew about it at the time. The 9/11 Commission Report identified Khalid Sheikh Mohammed as the architect of 9/11, but he is not mentioned in bin Laden's notes.[78]

    Planning
    Main article: Planning of the September 11 attacks
     Map of the attacks on the World Trade Center
     Diagram of the World Trade Center attacks
    The attacks were conceived by Khalid Sheikh Mohammed, who first presented it to Osama bin Laden in 1996.[79] At that time, bin Laden and Al-Qaeda were in a period of transition, having just relocated back to Afghanistan from Sudan.[80] The 1998 African embassy bombings and bin Laden's February 1998 fatwā marked a turning point of Al-Qaeda's terrorist operation,[81] as bin Laden became intent on attacking the United States.

    In late 1998 or early 1999, bin Laden approved Mohammed to go forward with organizing the plot.[82] Mohammed, bin Laden, and Mohammed Atef, bin Laden's deputy, held a series of meetings in early 1999.[83] Atef provided operational support, including target selections and helping arrange travel for the hijackers.[80] Bin Laden overruled Mohammed, rejecting potential targets such as the U.S. Bank Tower in Los Angeles for lack of time.[84][85]

    Bin Laden provided leadership and financial support and was involved in selecting participants.[86] He initially selected Nawaf al-Hazmi and Khalid al-Mihdhar, both experienced jihadists who had fought in Bosnia. Hazmi and Mihdhar arrived in the United States in mid-January 2000. In early 2000, Hazmi and Mihdhar took flying lessons in San Diego, California. Both spoke little English, performed poorly in flying lessons, and eventually served as secondary "muscle" hijackers.[87][88]

    In late 1999, a group of men from Hamburg, Germany, arrived in Afghanistan. The group included Mohamed Atta, Marwan al-Shehhi, Ziad Jarrah, and Ramzi bin al-Shibh.[89] Bin Laden selected these men because they were educated, could speak English, and had experience living in the West.[90] New recruits were routinely screened for special skills and Al-Qaeda leaders consequently discovered that Hani Hanjour already had a commercial pilot's license.[91] Mohammed later said that he helped the hijackers blend in by teaching them how to order food in restaurants and dress in Western clothing.[92]

    Hanjour arrived in San Diego on December 8, 2000, joining Hazmi.[93]: 6–7  They soon left for Arizona, where Hanjour took refresher training.[93]: 7  Marwan al-Shehhi arrived at the end of May 2000, while Atta arrived on June 3, 2000, and Jarrah arrived on June 27, 2000.[93]: 6  Bin al-Shibh applied several times for a visa to the United States, but as a Yemeni, he was rejected out of concerns he would overstay his visa.[93]: 4, 14  Bin al-Shibh stayed in Hamburg, providing coordination between Atta and Mohammed.[93]: 16  The three Hamburg cell members all took pilot training in South Florida at Huffman Aviation.[93]: 6 

    In the spring of 2001, the secondary hijackers began arriving in the United States.[94] In July 2001, Atta met with bin al-Shibh in Tarragona, Catalonia, Spain, where they coordinated details of the plot, including final target selection. Bin al-Shibh also passed along bin Laden's wish for the attacks to be carried out as soon as possible.[95] Some of the hijackers received passports from corrupt Saudi officials who were family members or used fraudulent passports to gain entry.[96]

    There have been a few theories that 9/11 was selected by the hijackers as the date of the attack because it resembled 9-1-1, the phone number used to report emergencies in the United States. However, Lawrence Wright wrote that the hijackers chose the date when John III Sobieski, the King of Poland and Grand Duke of Lithuania, began the battle that turned back the Ottoman Empire's Muslim armies that were attempting to capture Vienna (present-day capital of Austria) on 11 September 1683. During 1683, Vienna was the seat of the Holy Roman Empire and Habsburg monarchy, both major powers in Europe at the time. For Osama bin Laden, this was a date when the West gained some dominance over Islam, and by attacking on this date, he hoped to make a step in Islam "winning" the war for worldwide power and influence.[97]

    Prior intelligence
    Main article: September 11 intelligence before the attacks
    In late 1999, Al-Qaeda associate Walid bin Attash ("Khallad") contacted Mihdhar and told him to meet in Kuala Lumpur, Malaysia; Hazmi and Abu Bara al Yemeni would also be in attendance. The NSA intercepted a telephone call mentioning the meeting, Mihdhar, and the name "Nawaf" (Hazmi); while the agency feared "Something nefarious might be afoot", it took no further action.

    The CIA had already been alerted by Saudi intelligence about the status of Mihdhar and Hazmi as Al-Qaeda members and a CIA team broke into Mihdhar's Dubai hotel room and discovered that Mihdhar had a U.S. visa. While Alec Station alerted intelligence agencies worldwide about this fact, it did not share this information with the FBI. The Malaysian Special Branch observed the January 5, 2000, meeting of the two Al-Qaeda members and informed the CIA that Mihdhar, Hazmi, and Khallad were flying to Bangkok, but the CIA never notified other agencies of this, nor did it ask the State Department to put Mihdhar on its watchlist. An FBI liaison to Alec Station asked permission to inform the FBI of the meeting but was told: "This is not a matter for the FBI".[98]

    By late June, senior counter-terrorism official Richard Clarke and CIA director George Tenet were "convinced that a major series of attacks was about to come", although the CIA believed the attacks would likely occur in Saudi Arabia or Israel.[99] In early July, Clarke put domestic agencies on "full alert", telling them, "Something spectacular is going to happen here, and it's going to happen soon". He asked the FBI and the State Department to alert the embassies and police departments, and the Defense Department to go to "Threat Condition Delta".[100][101] Clarke later wrote: "Somewhere in CIA there was information that two known al Qaeda terrorists had come into the United States. Somewhere in the FBI, there was information that strange things had been going on at flight schools in the United States ... They had specific information about individual terrorists from which one could have deduced what was about to happen. None of that information got to me or the White House".[102]

    [...] by July [2001], with word spreading of a coming attack, a schism emerged among the senior leadership of al Qaeda. Several senior members reportedly agreed with Mullah Omar. Those who reportedly sided with bin Ladin included Atef, Sulayman Abu Ghayth, and KSM. But those said to have opposed him were weighty figures in the organization-including Abu Hafs the Mauritanian, Sheikh Saeed al Masri, and Sayf al Adl. One senior al Qaeda operative claims to recall Bin Ladin arguing that attacks against the United States needed to be carried out immediately to support insurgency in the Israeli-occupied territories and protest the presence of U.S. forces in Saudi Arabia.
    — 9/11 Commission Report, pp. 251[103]
    On July 13, Tom Wilshire, a CIA agent assigned to the FBI's international terrorism division, emailed his superiors at the CIA's Counterterrorism Center (CTC) requesting permission to inform the FBI that Hazmi was in the country and that Mihdhar had a U.S. visa. The CIA never responded.[104]

    The same day in July, Margarette Gillespie, an FBI analyst working in the CTC, was told to review material about the Malaysia meeting. She was not told of the participant's presence in the U.S. The CIA gave Gillespie surveillance photos of Mihdhar and Hazmi from the meeting to show to FBI counterterrorism but did not tell her their significance. The Intelink database informed her not to share intelligence material at the meeting with criminal investigators. When shown the photos, the FBI refused more details on their significance, and they were not given Mihdhar's date of birth or passport number.[105] In late August 2001, Gillespie told the INS, the State Department, the Customs Service, and the FBI to put Hazmi and Mihdhar on their watchlists, but the FBI was prohibited from using criminal agents in searching for the duo, hindering their efforts.[106]

    Also in July, a Phoenix-based FBI agent sent a message to FBI headquarters, Alec Station, and FBI agents in New York alerting them to "the possibility of a coordinated effort by Osama bin Laden to send students to the United States to attend civil aviation universities and colleges". The agent, Kenneth Williams, suggested the need to interview all flight school managers and identify all Arab students seeking flight training.[107] In July, Jordan alerted the U.S. that Al-Qaeda was planning an attack on the U.S.; "months later", Jordan notified the U.S. that the attack's codename was "The Big Wedding" and that it involved aeroplanes.[108]

    On August 6, 2001, the CIA's Presidential Daily Brief ("PDB"), designated "For the President Only", was entitled Bin Ladin Determined to Strike in US. The memo noted that FBI information "indicates patterns of suspicious activity in this country consistent with preparations for hijackings or other types of attacks".[109]

    In mid-August, one Minnesota flight school alerted the FBI about Zacarias Moussaoui, who had asked "suspicious questions". The FBI found that Moussaoui was a radical who had travelled to Pakistan, and the INS arrested him for overstaying his French visa. Their request to search his laptop was denied by FBI headquarters due to the lack of probable cause.[110]

    The failures in intelligence-sharing were attributed to 1995 Justice Department policies limiting intelligence-sharing, combined with CIA and NSA reluctance to reveal "sensitive sources and methods" such as tapped phones.[111] Testifying before the 9/11 Commission in April 2004, then – Attorney General John Ashcroft recalled that the "single greatest structural cause for the September 11th problem was the wall that segregated or separated criminal investigators and intelligence agents".[112] Clarke also wrote: "[T]here were... failures to get information to the right place at the right time".[113]

    Attacks
    For a chronological guide, see Timeline for the day of the September 11 attacks.
    Early on the morning of Tuesday, September 11, 2001, nineteen hijackers took control of four commercial airliners (two Boeing 757s and two Boeing 767s) en route to California after takeoffs from Logan International Airport in Boston, Massachusetts; Newark Liberty International Airport in Newark, New Jersey; and Washington Dulles International Airport in Loudoun and Fairfax counties in Virginia.[114] Large planes with long coast-to-coast flights were selected for hijacking because they would have more fuel.[115]

    Key info about the four flights
    Operator
    Flight number
    Aircraft type
    Time of departure*
    Time of crash*
    Departed from
    En route to
    Crash site
    Fatalities
    (There were no survivors from the flights)
    Crew
    Passengers†
    Ground§
    Hijackers
    Total‡
    American Airlines
    11
    Boeing 767-223ER
    7:59 a.m.
    8:46 a.m.
    Logan International Airport
    Los Angeles International Airport
    North Tower of the World Trade Center, floors 93 to 99
    11
    76
    2,606
    5
    2,763
    United Airlines
    175
    Boeing 767–222
    8:14 a.m.
    9:03 a.m.[g]
    Logan International Airport
    Los Angeles International Airport
    South Tower of the World Trade Center, floors 77 to 85
    9
    51
    5
    American Airlines
    77
    Boeing 757–223
    8:20 a.m.
    9:37 a.m.
    Washington Dulles International Airport
    Los Angeles International Airport
    West wall of Pentagon
    6
    53
    125
    5
    189
    United Airlines
    93
    Boeing 757–222
    8:42 a.m.
    10:03 a.m.
    Newark Int'l Airport
    San Francisco International Airport
    Field in Stonycreek Township near Shanksville
    7
    33
    0
    4
    44
    Totals
    33
    213
    2,731
    19
    2,996
    * Eastern Daylight Time (UTC−04:00)
    † Excluding hijackers
    § Including emergency workers
    ‡ Including hijackers

    The four crashes
    See also: Media documentation of the September 11 attacks
    Duration: 52 seconds.0:52
    United Airlines Flight 175 crashes into 2 World Trade Center
    At 7:59 a.m., American Airlines Flight 11 took off from Logan International Airport in Boston.[116] Fifteen minutes into the flight, five hijackers armed with boxcutters took over the plane, injuring at least three people (and possibly killing one)[117][118][119] before forcing their way into the cockpit. The terrorists also displayed an apparent explosive and sprayed mace into the cabin, to frighten the hostages into submission and further hinder resistance.[120] Back at Logan, United Airlines Flight 175 took off at 8:14 a.m., approximately the same time as Flight 11's hijacking.[121] Hundreds of miles southwest at Dulles International Airport, American Airlines Flight 77 left the runway at 8:20 a.m.[121] Flight 175's journey proceeded normally for 28 minutes until 8:42 a.m., when a group of five hijacked the plane, murdering both pilots and stabbing several crew members before assuming control of the aircraft. These hijackers also used bomb threats to instil fear into the passengers and crew,[122] also spraying chemical weapons to disable any opposition.[123] Concurrently, United Airlines Flight 93 departed from Newark International Airport in New Jersey;[121] originally scheduled to pull away from the gate at 8:00 a.m., the plane was running 42 minutes late.

    At 8:46 a.m., Flight 11 was deliberately crashed into the north face of the World Trade Center's North Tower (1 WTC),[124] although the initial presumption by many was that this was merely an accident.[125] At 8:51 a.m., American Airlines Flight 77 was also taken over by another group of five who forcibly entered the cockpit 31 minutes after takeoff.[126] Although the hijackers on this flight were equipped with knives,[127] there were no reports of anyone on board being stabbed, nor did the two people who made phone calls mention the use of mace or a bomb threat.

    Seventeen minutes after the first plane crashed into the North Tower, Flight 175 was flown into the South Tower's southern facade (2 WTC)[128] at 9:03 a.m.,[g] demonstrating that the first crash was not an accident, but rather a terrorist attack.[129][130]

    Four men aboard Flight 93 struck suddenly, killing at least one passenger, after having waited 46 minutes to make their move—a holdup that proved disastrous for the terrorists when combined with the delayed takeoff from the runway;[131] they stormed the cockpit and seized control of the plane at 9:28 a.m., turning the plane eastbound and setting course for Washington, D.C.[132] Much like their counterparts on the first two flights, the fourth team also used bomb threats and filled the cabin with mace.[133]

    Nine minutes after Flight 93's hijacking, Flight 77 crashed into the west side of the Pentagon.[134] Because of the two delays,[135] the passengers and crew of Flight 93 had time to be made aware of the previous attacks through phone calls to the ground, and as a result an uprising was hastily organized to take control of the aircraft at 9:57 a.m.[136] Within minutes, passengers had fought their way to the front of the cabin and began breaking down the cockpit door. Fearing their captives would gain the upper hand, the hijackers rolled the plane and pitched it into a nosedive,[137][138] crashing into a field near Shanksville, Pennsylvania, southeast of Pittsburgh, at 10:03 a.m. The plane was about twenty minutes away from reaching D.C. at the time of the crash, and its target is believed to have been either the Capitol Building or the White House.[115][136]

    Some passengers and crew members who called from the aircraft using the cabin air phone service and mobile phones provided details: several hijackers were aboard each plane; they used mace, tear gas, or pepper spray to overcome attendants; and some people aboard had been stabbed.[139] Reports indicated hijackers stabbed and killed pilots, flight attendants, and one or more passengers.[114][140] According to the 9/11 Commission's final report, the hijackers had recently purchased multi-function hand tools and assorted Leatherman-type utility knives with locking blades (which were not forbidden to passengers at the time), but these were not found among the possessions left behind by the hijackers.[141][142] A flight attendant on Flight 11, a passenger on Flight 175, and passengers on Flight 93 said the hijackers had bombs, but one of the passengers said he thought the bombs were fake. The FBI found no traces of explosives at the crash sites, and the 9/11 Commission concluded that the bombs were probably fake.[114] On at least two of the hijacked flights—American 11 and United 93—the terrorists claimed over the PA system that they were taking hostages and were returning to the airport to have a ransom demand met, a clear attempt to prevent passengers from fighting back. Both attempts failed, however, as both hijacker pilots in these instances (Mohamed Atta[143] and Ziad Jarrah,[144] respectively) keyed the wrong switch and mistakenly transmitted their messages to ATC instead of the people on the plane as intended, tipping off the flight controllers that the planes had been hijacked.

     Duration: 3 minutes and 12 seconds.3:12Security camera footage of American Airlines Flight 77 crashing into the Pentagon;[145] the plane collides with The Pentagon approximately 86 seconds after the start of the recording
    Three buildings in the World Trade Center collapsed due to fire-induced structural failure. Although the South Tower was struck 17 minutes after the North Tower, the plane's impact zone was far lower, at a much faster speed, and into a corner, with the unevenly-balanced additional structural weight causing it to collapse first at 9:59 a.m.,[146]: 80 [147]: 322  having burned for 56 minutes[i] in the fire caused by the crash of United Airlines Flight 175 and the explosion of its fuel. The North Tower lasted another 29 minutes before collapsing at 10:28 a.m.,[j] one hour and forty-two minutes[h] after being struck by American Airlines Flight 11. When the North Tower collapsed, debris fell on the nearby 7 World Trade Center building (7 WTC), damaging the building and starting fires. These fires burned for nearly seven hours, compromising the building's structural integrity, and 7 WTC collapsed at 5:21 p.m.[151][152] The west side of the Pentagon sustained significant damage.

    At 9:42 a.m., the Federal Aviation Administration (FAA) grounded all civilian aircraft within the continental U.S., and civilian aircraft already in flight were told to land immediately.[153] All international civilian aircraft were either turned back or redirected to airports in Canada or Mexico, and were banned from landing on United States territory for three days.[154] The attacks created widespread confusion among news organizations and air traffic controllers. Among unconfirmed and often contradictory news reports aired throughout the day, one of the most prevalent claimed a car bomb had been detonated at the U.S. State Department's headquarters in Washington, D.C.[155] Another jet (Delta Air Lines Flight 1989) was suspected of having been hijacked, but the aircraft responded to controllers and landed safely in Cleveland, Ohio.[156]

    In an April 2002 interview, Khalid Sheikh Mohammed and Ramzi bin al-Shibh, who are believed to have organized the attacks, said Flight 93's intended target was the United States Capitol, not the White House.[157] During the planning stage of the attacks, Mohamed Atta (Flight 11's hijacker and pilot) thought the White House might be too tough a target and sought an assessment from Hani Hanjour (who hijacked and piloted Flight 77).[158] Mohammed said Al-Qaeda initially planned to target nuclear installations rather than the World Trade Center and the Pentagon, but decided against it, fearing things could "get out of control".[159] Final decisions on targets, according to Mohammed, were left in the hands of the pilots.[158] If any pilot could not reach his intended target, he was to crash the plane.[115]

    Casualties
    Main articles: Casualties of the September 11 attacks and Lists of victims of the September 11 attacks
     One of three observable falls from the South Tower.[160] A similar photograph of a victim from the North Tower titled The Falling Man gained wide acclamation.
    The attack on the World Trade Center's North Tower single-handedly[k] made 9/11 the deadliest act of terrorism in world history.[162] Taken together, the four crashes caused the deaths of 2,996 people (including the hijackers) and injured thousands more.[163] The death toll included 265 on the four planes (from which there were no survivors); 2,606 in the World Trade Center and in the surrounding area; and 125 at The Pentagon.[164][165] Most who died were civilians, as well as 343 firefighters, 72 law enforcement officers, 55 military personnel, and the 19 terrorists.[166][167] After New York, New Jersey lost the most state citizens.[168] More than 90 countries lost citizens in the attacks.[169]

    In New York City, more than 90% of the workers and visitors who died in the towers had been at or above the points of impact. In the North Tower, between 1,344[170] and 1,402[171] people were at, above or one floor below the point of impact and all died. Hundreds were killed instantly the moment the plane struck.[172] The estimated 800 people[173] who survived the impact were trapped and died in the fires or from smoke inhalation; fell or jumped from the tower to escape the smoke and flames; or were killed in the building's collapse. The destruction of all three staircases in the North Tower when Flight 11 hit made it impossible for anyone from the impact zone upward to escape. 107 people not trapped by the impact died.[174] When the plane struck between floors 93 and 99, the 92nd floor was also rendered inescapable when the crash severed all elevator shafts while debris falling from the impact zone blocked the stairwells, ensuring the deaths of all 69 workers on the floor below the point of impact.

    In the South Tower, around 600 people were on or above the 77th floor when Flight 175 struck and few survived. As with the North Tower, hundreds were killed at the moment of impact. Unlike those in the North Tower, the estimated 300 survivors[173] of the crash were not technically trapped by the damage done by Flight 175's impact, but most were either unaware that a means of escape still existed or were unable to use it. One stairway, Stairwell A, narrowly avoided being destroyed as Flight 175 crashed through the building, allowing 14 people located on the floors of impact (including Stanley Praimnath, a man who saw the plane coming at him) and four more from the floors above to escape. New York City 9-1-1 operators who received calls from people inside the tower were not well informed of the situation as it rapidly unfolded and as a result, told callers not to descend the tower on their own.[175] In total, 630 people died in the South Tower, fewer than half the number killed in the North Tower.[174] Of the 100–200 people witnessed jumping or falling to their deaths that morning,[176] only three recorded sightings were from the South Tower.[177]: 86  Casualties in the South Tower were significantly reduced because some occupants decided to leave the building immediately following the first crash, and because Eric Eisenberg, an executive at AON Insurance, made the decision to evacuate the floors occupied by AON (floors 92 and 98–105) in the moments following the impact of Flight 11. The 17-minute gap allowed over 900 of the 1,100 AON employees present on-site to evacuate from above the 77th floor before the South Tower was struck; Eisenberg was among the nearly 200 who did not escape. Similar pre-impact evacuations were carried out by companies such as Fiduciary Trust, CSC, and Euro Brokers, all of whom had offices on floors above the point of impact. The failure to order a full evacuation of the South Tower after the first plane crash into the North Tower was described by USA Today as "one of the day's great tragedies".[178]

    As exemplified in the photograph The Falling Man, more than 200 people fell to their deaths from the burning towers, most of whom were forced to jump to escape the extreme heat, fire and smoke.[179] Some occupants of each tower above the point of impact made their way toward the roof in the hope of helicopter rescue, but the roof access doors were locked.[180] No plan existed for helicopter rescues, and the combination of roof equipment, thick smoke and intense heat prevented helicopters from approaching.[181]

    At the World Trade Center complex, a total of 414 emergency workers died as they tried to rescue people and fight fires, while another law enforcement officer was separately killed when United 93 crashed. The New York City Fire Department (FDNY) lost 343 firefighters, including a chaplain and two paramedics.[182][183][184] The New York City Police Department (NYPD) lost 23 officers.[185] The Port Authority Police Department (PAPD) lost 37 officers.[186] Eight emergency medical technicians (EMTs) and paramedics from private emergency medical services (EMS) units were killed.[187] Almost all of the emergency personnel who died at the scene that day were killed as a result of the towers collapsing, with the exception of one who was struck by a civilian falling from the upper floors of the South Tower.[188]

    Cantor Fitzgerald L.P. (an investment bank on the North Tower's 101st–105th floors) lost 658 employees, considerably more than any other employer.[189] Marsh Inc., located immediately below Cantor Fitzgerald on floors 93–100, lost 358 employees,[190][191] and 175 employees of Aon Corporation were also killed.[192] The National Institute of Standards and Technology (NIST) estimated that about 17,400 civilians were in the World Trade Center complex at the time of the attacks. Turnstile counts from the Port Authority suggest 14,154 people were typically in the Twin Towers by 8:45 a.m.[193][page needed][194] Most people below the impact zone safely evacuated the buildings.[195]

    In Arlington County, Virginia, 125 Pentagon workers died when Flight 77 crashed into the building's western side. 70 were civilians and 55 were military personnel, many of whom worked for the United States Army or the United States Navy. The Army lost 47 civilian employees; six civilian contractors; and 22 soldiers, while the Navy lost six civilian employees; three civilian contractors; and 33 sailors. Seven Defense Intelligence Agency (DIA) civilian employees died, and one Office of the Secretary of Defense (OSD) contractor.[196][197][198] Lieutenant General Timothy Maude, an Army Deputy Chief of Staff, was the highest-ranking military official killed at the Pentagon.[199]

    Weeks after the attack, the death toll was estimated to be over 6,000, more than twice the number of deaths eventually confirmed.[200] The city was only able to identify remains for about 1,600 of the World Trade Center victims. The medical examiner's office collected "about 10,000 unidentified bone and tissue fragments that cannot be matched to the list of the dead".[201] Bone fragments were still being found in 2006 by workers who were preparing to demolish the damaged Deutsche Bank Building.

    In 2010, a team of anthropologists and archaeologists searched for human remains and personal items at the Fresh Kills Landfill, where 72 more human remains were recovered, bringing the total found to 1,845. DNA profiling continues in an attempt to identify additional victims.[202][203][204] The remains are being held in storage in Memorial Park, outside the New York City Medical Examiner's facilities. It was expected that the remains would be moved in 2013 to a repository behind a wall at the 9/11 museum.[needs update][205]

    In July 2011, a team of scientists at the Office of Chief Medical Examiner continued efforts to identify remains, in the hope that improved technology will allow them to identify other victims.[204] In August 2017, the 1,641st victim was identified as a result of newly available DNA technology,[206] and a 1,642nd during July 2018.[207] Three more victims were identified in October 2019,[208] two in September 2021[209] and an additional two in September 2023.[210] As of September 2023, 1,104 victims remain unidentified,[210] amounting to 40% of the deaths in the World Trade Center attacks.[209] On September 25, 2023, the FDNY reported that with the death of EMT Hilda Vannata and retired firefighter Robert Fulco, marking the 342nd and 343rd deaths from 9/11-related illnesses, the department had now lost the same number of firefighters, EMTs, and civilian members to 9/11-related illnesses as it did on the day of the attacks.[211][212]

    Damage
    Further information: Collapse of the World Trade Center
     The World Trade Center site, called Ground Zero, with an overlay showing the original buildings' locations
    Along with the 110-floor Twin Towers, numerous other buildings at the World Trade Center site were destroyed or badly damaged, including WTC buildings 3 through 7 and St. Nicholas Greek Orthodox Church.[213] The North Tower, South Tower, the Marriott Hotel (3 WTC), and 7 WTC were destroyed. The U.S. Customs House (6 World Trade Center), 4 World Trade Center, 5 World Trade Center, and both pedestrian bridges connecting buildings were severely damaged. The Deutsche Bank Building (still popularly referred to as the Bankers Trust Building) on 130 Liberty Street was partially damaged and demolished some years later, starting in 2007.[214][215] The two buildings of the World Financial Center also suffered damage.[214] The last fires at the World Trade Center site were extinguished on December 20, exactly 100 days after the attacks.[216]

    The Deutsche Bank Building across Liberty Street from the World Trade Center complex was later condemned as uninhabitable because of toxic conditions inside the office tower and was deconstructed.[217][218] The Borough of Manhattan Community College's Fiterman Hall at 30 West Broadway was condemned due to extensive damage from the attacks, and then reopened in 2012.[219]

    Other neighbouring buildings (including 90 West Street and the Verizon Building) suffered major damage but have been restored.[220] World Financial Center buildings, One Liberty Plaza, the Millenium Hilton, and 90 Church Street had moderate damage and have since been restored.[221] Communications equipment on top of the North Tower was also destroyed, with only WCBS-TV maintaining a backup transmitter on the Empire State Building, but media stations were quickly able to reroute the signals and resume their broadcasts.[213][222]

     A September 14 aerial view of the Pentagon during cleanup operations
    The PATH train system's World Trade Center station was located under the complex. As a result, the station was demolished when the towers collapsed, and the tunnels leading to Exchange Place station in Jersey City, New Jersey, were flooded with water.[223] The station was rebuilt as the $4 billion World Trade Center Transportation Hub, which reopened in March 2015.[224][225] The Cortlandt Street station on the New York City Subway's IRT Broadway–Seventh Avenue Line was also in close proximity to the World Trade Center complex, and the entire station, along with the surrounding track, was reduced to rubble.[226] The latter station was rebuilt and reopened to the public on September 8, 2018.[227] The Pentagon was extensively damaged by the impact of American Airlines Flight 77 and the ensuing fires, causing one section of the building to collapse.[228] As the aeroplane approached the Pentagon, its wings knocked down light poles and its right engine hit a power generator before crashing into the western side of the building.[229][230] The plane hit the Pentagon at the first-floor level. The front part of the fuselage disintegrated on impact, while the mid and tail sections kept moving for another fraction of a second.[231] Debris from the tail section penetrated the furthest into the building, breaking through 310 feet (94 m) of the three outermost of the building's five rings.[231][232]

    Rescue efforts
    Main article: Rescue and recovery effort after the September 11 attacks on the World Trade Center
    See also: List of emergency and first responder agencies that responded to the September 11 attacks
     Patrol Boat Hocking of the U.S. Army Corps of Engineers on its way to assist the site on September 11, 2001
    The New York City Fire Department (FDNY) deployed more than 200 units (approximately half of the department) to the World Trade Center.[233] Their efforts were supplemented by numerous off-duty firefighters and emergency medical technicians.[234][233][235] The New York City Police Department (NYPD) sent its Emergency Service Units and other police personnel and deployed its aviation unit.[236] The NYPD aviation unit assessed the situation and decided that helicopter rescues from the towers were not feasible.[237] Numerous police officers of the Port Authority Police Department (PAPD) also participated in rescue efforts.[238] Once on the scene, the FDNY, the NYPD, and the PAPD did not coordinate efforts and performed redundant searches for civilians.[234][239]

    As conditions deteriorated, the NYPD aviation unit relayed information to police commanders, who issued orders for personnel to evacuate the towers; most NYPD officers were able to safely evacuate before the buildings collapsed.[239][240] With separate command posts set up and incompatible radio communications between the agencies, warnings were not passed along to FDNY commanders.[241]

    After the first tower collapsed, FDNY commanders issued evacuation warnings. Due to technical difficulties with malfunctioning radio repeater systems, many firefighters never heard the evacuation orders. 9-1-1 dispatchers also received information from callers that was not passed along to commanders on the scene.[233]

    Reactions
    Main article: Reactions to the September 11 attacks
    See also: Timeline for September following the September 11 attacks
    The 9/11 attacks resulted in immediate responses to the event, including domestic reactions; closings and cancellations; hate crimes; Muslim-American responses to the event; international responses to the attack; and military responses to the events. Shortly after the attacks, a U.S. government fund that was created by an Act of Congress named the September 11th Victim Compensation Fund.[242][243] The purpose of the fund was to compensate the victims of the attacks and their families with the quid pro quo of their agreement not to file lawsuits against the airline corporations involved.[244] Legislation authorizes the fund to disburse a maximum of $7.375 billion, including operational and administrative costs, of U.S. government funds.[245] The fund was set to expire by 2020 but was in 2019 prolonged to allow claims to be filed until October 2090.[246][247]

    Immediate response
    Further information: U.S. military response during the September 11 attacks
    See also: Communication during the September 11 attacks
     President George W. Bush is briefed in Sarasota, Florida, where he learned of the attacks unfolding while visiting Emma E. Booker Elementary School.
     Eight hours after the attacks, U.S. Secretary of Defense Donald Rumsfeld declares "The Pentagon is functioning"
    At 8:32 a.m., FAA officials were notified Flight 11 had been hijacked and they, in turn, notified the North American Aerospace Defense Command (NORAD). NORAD scrambled two F-15s from Otis Air National Guard Base in Massachusetts and they were airborne by 8:53 a.m. Because of slow and confused communication from FAA officials, NORAD had nine minutes' notice, and no notice about any of the other flights before they crashed.

    After both of the Twin Towers had already been hit, more fighters were scrambled from Langley Air Force Base in Virginia at 9:30 a.m.[248] At 10:20 a.m., Vice President Dick Cheney issued orders to shoot down any commercial aircraft that could be positively identified as being hijacked. These instructions were not relayed in time for the fighters to take action.[248][249][250] Some fighters took to the air without live ammunition, knowing that to prevent the hijackers from striking their intended targets, the pilots might have to intercept and crash their fighters into the hijacked planes, possibly ejecting at the last moment.[251]

    For the first time in U.S. history, the emergency preparedness plan called Security Control of Air Traffic and Air Navigation Aids (SCATANA) was invoked,[252] thus stranding tens of thousands of passengers across the world.[253] Ben Sliney, in his first day as the National Operations Manager of the FAA,[254] ordered that American airspace would be closed to all international flights, causing about 500 flights to be turned back or redirected to other countries. Canada received 226 of the diverted flights and launched Operation Yellow Ribbon to deal with the large numbers of grounded planes and stranded passengers.[255]

    The 9/11 attacks had immediate effects on the American people.[256] Police and rescue workers from around the country took a leave of absence from their jobs and travelled to New York City to help recover bodies from the twisted remnants of the Twin Towers.[257] Blood donations across the U.S. surged in the weeks after 9/11.[258][259]

    The deaths of adults in the attacks resulted in over 3,000 children losing a parent.[260] Subsequent studies documented children's reactions to these actual losses and feared losses of life, the protective environment in the attacks' aftermath, and the effects on surviving caregivers.[261][262][263]

    Domestic reactions
    Further information: U.S. government response to the September 11 attacks
     
    President Bush addressing the nation from the White House at 8:30 PM ET
     
    Bush speaking to rescue workers at Ground Zero on September 14
     
    Duration: 34 minutes and 18 seconds.34:18
    During a speech to a joint session of Congress, President George W. Bush pledges "to defend freedom against terrorism". September 20, 2001 (audio only).
    Following the attacks, President George W. Bush's approval rating increased to 90%.[264] On September 20, 2001, he addressed the nation and a joint session of Congress regarding the events of September 11 and the subsequent nine days of rescue and recovery efforts, and described his intended response to the attacks. New York City mayor Rudy Giuliani's highly visible role resulted in praise in New York and nationally.[265]

    Many relief funds were immediately set up to assist the attacks' victims, with the task of providing financial assistance to the survivors of the attacks and the victims' families. By the deadline for victims' compensation on September 11, 2003, 2,833 applications had been received from the families of those who were killed.[266]

    Contingency plans for the continuity of government and the evacuation of leaders were implemented soon after the attacks.[253] Congress was not told that the United States had been under a continuity of government status until February 2002.[267]

    In the largest restructuring of the U.S. government in contemporary history, the United States enacted the Homeland Security Act of 2002, creating the U.S. Department of Homeland Security. Congress also passed the USA PATRIOT Act, saying it would help detect and prosecute terrorism and other crimes.[268] Civil liberties groups have criticized the PATRIOT Act, saying it allows law enforcement to invade citizens' privacy and that it eliminates judicial oversight of law enforcement and domestic intelligence.[269][270][271]

    To effectively combat future acts of terrorism, the National Security Agency (NSA) was given broad powers. NSA commenced warrantless surveillance of telecommunications, which was sometimes criticized as permitting the agency "to eavesdrop on telephone and e-mail communications between the United States and people overseas without a warrant".[272] In response to requests by various intelligence agencies, the United States Foreign Intelligence Surveillance Court permitted an expansion of powers by the U.S. government in seeking, obtaining, and sharing information on U.S. citizens as well as non-U.S. people from around the world.[273]

    Hate crimes
    See also: Islamophobic incidents and Persecution of Muslims
    Six days after the attacks, President Bush made a public appearance at Washington, D.C.'s largest Islamic Center and acknowledged the "incredibly valuable contribution" that millions of American Muslims made to their country and called for them "to be treated with respect".[274] Numerous incidents of harassment and hate crimes against Muslims and South Asians were reported in the days following the attacks.[275][276][277]

    Sikhs were also subject to targeting due to the use of turbans in the Sikh faith, which are stereotypically associated with Muslims. There were reports of attacks on mosques and other religious buildings (including the firebombing of a Hindu temple), and assaults on individuals, including one murder: Balbir Singh Sodhi, a Sikh mistaken for a Muslim, who was fatally shot on September 15, 2001, in Mesa, Arizona.[277] Two dozen members of Osama bin Laden's family were urgently evacuated out of the country on a private charter plane under FBI supervision three days after the attacks.[278]

    According to an academic study, people perceived to be Middle Eastern were as likely to be victims of hate crimes as followers of Islam during this time. The study also found a similar increase in hate crimes against people who may have been perceived as Muslims, Arabs, and others thought to be of Middle Eastern origin.[279] A report by the South Asian American advocacy group known as South Asian Americans Leading Together documented media coverage of 645 bias incidents against Americans of South Asian or Middle Eastern descent between September 11 and 17, 2001. Various crimes such as vandalism, arson, assault, shootings, harassment, and threats in numerous places were documented.[280][281] Women wearing hijab were also targeted.[282]

    Discrimination and racial profiling
    Further information: Detentions following the September 11 attacks, Islamophobia in the United States, and Flying while Muslim
    See also: Airport racial profiling in the United States
    A poll of Arab-Americans, conducted in May 2002, found that 20% had personally experienced discrimination since September 11. A July 2002 poll of Muslim Americans found that 48% believed their lives had changed for the worse since September 11, and 57% had experienced an act of bias or discrimination.[282]

    Following the September 11 attacks, many Pakistani Americans identified themselves as Indians to avoid potential discrimination and obtain jobs (Pakistan was created as a result of the partition of India in 1947).[283]

    By May 2002, there were 488 complaints of employment discrimination reported to the U.S. Equal Employment Opportunity Commission (EEOC). 301 of those were complaints from people fired from their jobs. Similarly, by June 2002, the U.S. Department of Transportation (DOT) had investigated 111 September 11th-related complaints from airline passengers purporting that their religious or ethnic appearance caused them to be singled out at security screenings. DOT investigated an additional 31 complaints from people who alleged they were completely blocked from boarding aeroplanes on the same grounds.[282]

    Muslim American response
    See also: Muslim attitudes towards terrorism and Peace in Islamic philosophy
    Muslim organizations in the United States were swift to condemn the attacks and called "upon Muslim Americans to come forward with their skills and resources to help alleviate the sufferings of the affected people and their families".[284] These organizations included the Islamic Society of North America, American Muslim Alliance, American Muslim Council, Council on American-Islamic Relations, Islamic Circle of North America, and the Shari'a Scholars Association of North America. Along with monetary donations, many Islamic organizations launched blood drives and provided medical assistance, food, and shelter for victims.[285][286][287]

    Interfaith efforts
    Curiosity about Islam increased after the attacks. As a result, many mosques and Islamic centres began holding open houses and participating in outreach efforts to educate non-Muslims about the faith. In the first 10 years after the attacks, interfaith community service increased from 8 to 20 percent and the percentage of U.S. congregations involved in interfaith worship doubled from 7 to 14 percent.[288]

    International reactions
     President of Russia Vladimir Putin (right) with his wife (center) at a commemoration service in New York City on November 16
    The attacks were denounced by mass media and governments worldwide. Across the globe, nations offered pro-American support and solidarity.[289] Leaders in most Middle Eastern countries, as well as Libya and Afghanistan, condemned the attacks. Iraq was a notable exception, with an immediate official statement that "the American cowboys are reaping the fruit of their crimes against humanity".[290] The government of Saudi Arabia officially condemned the attacks, but privately many Saudis favored bin Laden's cause.[291][292]

    Although Palestinian Authority (PA) president Yasser Arafat also condemned the attacks, there were reports of celebrations of disputed size in the West Bank, Gaza Strip, and East Jerusalem.[293][294] Palestinian leaders discredited news broadcasters that justified the attacks or showed celebrations,[295] and the Authority claimed such celebrations do not represent the Palestinians' sentiment, adding that it would not allow "a few kids" to "smear the real face of the Palestinians".[296][297] Footage by CNN[vague] and other news outlets were suggested by a report originating at a Brazilian university to be from 1991; this was later proven to be a false accusation, resulting in a statement being issued by CNN.[298][299] As in the United States, the aftermath of the attacks saw tensions increase in other countries between Muslims and non-Muslims.[300]

    United Nations Security Council Resolution 1368 condemned the attacks and expressed readiness to take all necessary steps to respond and combat all forms of terrorism in accordance with their Charter.[301] Numerous countries introduced anti-terrorism legislation and froze bank accounts they suspected of Al-Qaeda ties.[302][303] Law enforcement and intelligence agencies in a number of countries arrested alleged terrorists.[304][305]

    British Prime Minister Tony Blair said Britain stood "shoulder to shoulder" with the United States.[306] A few days later, Blair flew to Washington, D.C., to affirm British solidarity with the United States. In a speech to Congress nine days after the attacks, which Blair attended as a guest, President Bush declared "America has no truer friend than Great Britain".[307] Subsequently, Prime Minister Blair embarked on two months of diplomacy to rally international support for military action; he held 54 meetings with world leaders and travelled more than 40,000 miles (60,000 km).[308]

    The U.S. set up the Guantanamo Bay detention camp to hold inmates they defined as "illegal enemy combatants". The legitimacy of these detentions has been questioned by the European Union and human rights organizations.[309][310][311]

    On September 25, 2001, Iran's fifth president, Mohammad Khatami, meeting British Foreign Secretary Jack Straw, said: "Iran fully understands the feelings of the Americans about the terrorist attacks in New York and Washington on September 11". He said although the American administrations had been at best indifferent about terrorist operations in Iran (since 1979), the Iranians felt differently and had expressed their sympathetic feelings with bereaved Americans in the tragic incidents in the two cities. He also stated that "Nations should not be punished in place of terrorists".[312]

    According to Radio Farda's website, when the news of the attacks was released, some Iranian citizens gathered in front of the Embassy of Switzerland in Tehran, which serves as the protecting power of the United States in Iran (U.S. interests-protecting office in Iran), to express their sympathy, and some of them lit candles as a symbol of mourning. This piece of news on Radio Farda's website also states that in 2011, on the anniversary of the attacks, the United States Department of State published a post on its blog, in which the Department thanked the Iranian people for their sympathy and stated that it would never forget Iranian people's kindness on those harsh days.[313] After the attacks, both the President[314][315] and the Supreme Leader of Iran, condemned the attacks. The BBC and Time magazine published reports on holding candlelit vigils for the victims of Iranian citizens on their websites.[316][317] According to Politico Magazine, following the attacks, Ali Khamenei, the Supreme Leader of Iran, "suspended the usual 'Death to America' chants at Friday prayers" temporarily.[318]

    In September 2001, shortly after the attacks, some fans of AEK Athens burned an Israeli flag and unsuccessfully tried to burn an American flag. Though the American flag did not catch fire, the fans booed during a moment of silence for victims of the attacks.[319]

    Military operations
    Further information: War on terror and US invasion of Afghanistan
    Events leading up
    to the Iraq War
     
    14 July Revolution 1958
    Iraqi–Kurdish conflict 1961–1991
    17 July Revolution 1968
    Iranian Revolution 1978–1979
    Ba'ath Party Purge 1979
    Iran–Iraq War 1980–1988
    Iraqgate 1982–c.1990
    Iraqi invasion of Kuwait 1990
    Gulf War 1990–1991
    Sanctions against Iraq 1990–2003
    Iraqi uprisings 1991
    Iraqi no-fly zones conflict 1991–2003
    Iraq disarmament crisis 1991–2003
    Arms-to-Iraq affair 1992–1996
    September 11 attacks 2001
    U.S. anthrax attacks 2001
    U.S. invasion of Afghanistan 2001
    Alleged Prague connection 2001
    Iraq Resolution 2002
    Wood Green ricin plot 2003
    Colin Powell's UN presentation 2003
    v
    t
    e
    At 2:40 p.m. on September 11, Secretary of Defense Donald Rumsfeld was issuing rapid orders to his aides to look for evidence of Iraqi involvement. According to notes taken by senior policy official Stephen Cambone, Rumsfeld asked for, "Best info fast. Judge whether they are good enough to hit S.H. [Saddam Hussein] at the same time. Not only UBL" [Osama bin Laden].[320] Cambone's notes quoted Rumsfeld as saying, "Need to move swiftly – Near term target needs – go massive – sweep it all up. Things related and not".[321][322]

    In a meeting at Camp David on September 15 the Bush administration rejected the idea of attacking Iraq in response to the September 11 attacks.[323] Nonetheless, they later invaded the country with allies, citing "Saddam Hussein's support for terrorism".[324] At the time, as many as seven in ten Americans believed the Iraqi president played a role in the 9/11 attacks.[325] Three years later, Bush conceded that he had not.[326]

    The NATO council declared that the terrorist attacks on the United States were an attack on all NATO nations that satisfied Article 5 of the NATO charter. This marked the first invocation of Article 5, which had been written during the Cold War with an attack by the Soviet Union in mind.[327] Australian Prime Minister John Howard, who was in Washington, D.C., during the attacks, invoked Article IV of the ANZUS treaty.[328] The Bush administration announced a war on terror, with the stated goals of bringing bin Laden and Al-Qaeda to justice and preventing the emergence of other terrorist networks.[329] These goals would be accomplished by imposing economic and military sanctions against states harbouring terrorists, and increasing global surveillance and intelligence sharing.[330]

    On September 14, 2001, the U.S. Congress passed the Authorization for the use of Military Force Against Terrorists, which grants the President the authority to use all "necessary and appropriate force" against those whom he determined "planned, authorized, committed or aided" the September 11 attacks or who harboured said persons or groups. It is still in effect to this day.[331]

    On October 7, 2001, the War in Afghanistan began when U.S. and British forces initiated aerial bombing campaigns targeting Taliban and Al-Qaeda camps, then later invaded Afghanistan with ground troops of the Special Forces.[citation needed] This eventually led to the overthrow of the Taliban's rule of Afghanistan with the Fall of Kandahar on December 7, 2001, by U.S.-led coalition forces.[332]

    Al-Qaeda leader Osama bin Laden, who went into hiding in the White Mountains, was targeted by U.S. coalition forces in the Battle of Tora Bora,[333] but he escaped across the Pakistani border and would remain out of sight for almost ten years.[333] In an interview with Tayseer Allouni on 21 October 2001, Bin Laden stated:

    "The events proved the extent of terrorism that America exercises in the world. Bush stated that the world has to be divided in two: Bush and his supporters, and any country that doesn't get into the global crusade is with the terrorists. What terrorism is clearer than this? Many governments were forced to support this "new terrorism.".. America wouldn't live in security until we live it truly in Palestine. This showed the reality of America, which puts Israel's interest above its own people's interest. America won't get out of this crisis until it gets out of the Arabian Peninsula, and until it stops its support of Israel.[334]
    The Philippines and Indonesia, among other nations with their internal conflicts with Islamic terrorism, also increased their military readiness.[335][336] The military forces of the United States of America and the Islamic Republic of Iran cooperated to overthrow the Taliban regime, which had had conflicts with the government of Iran.[318][337][338][339]Iran's Quds Force helped U.S. forces and Afghan rebels in the 2001 uprising in Herat.[340][341][342]

    Aftermath
    Main article: Aftermath of the September 11 attacks
    See also: Post-9/11
    Health issues
    Main article: Health effects arising from the September 11 attacks
     Survivors covered in dust after the collapse of the World Trade towers; a photograph of another dust-covered victim Marcy Borders (1973–2015) subsequently gained much attention[343][344]
    Hundreds of thousands of tons of toxic debris containing more than 2,500 contaminants and known carcinogens were spread across Lower Manhattan when the Twin Towers' collapsed.[345][346] Exposure to the toxins in the debris is alleged to have contributed to fatal or debilitating illnesses among people who were at Ground Zero.[347][348] The Bush administration ordered the Environmental Protection Agency (EPA) to issue reassuring statements regarding air quality in the aftermath of the attacks, citing national security, but the EPA did not determine that air quality had returned to pre-September 11 levels until June 2002.[349]

    Health effects extended to residents, students, and office workers of Lower Manhattan and nearby Chinatown.[350] Several deaths have been linked to the toxic dust, and victims' names were included in the World Trade Center memorial.[351] Approximately 18,000 people have been estimated to have developed illnesses as a result of the toxic dust.[352] There is also scientific speculation that exposure to various toxic products in the air may have negative effects on fetal development.[citation needed] A study of rescue workers released in April 2010 found that all those studied had impaired lung functions and that 30%–40% were reporting little or no improvement in persistent symptoms that started within the first year of the attack.[353]

    Years after the attacks, legal disputes over the costs of illnesses related to the attacks were still in the court system. On October 17, 2006, a federal judge rejected New York City's refusal to pay for health costs for rescue workers, allowing for the possibility of numerous suits against the city.[354] Government officials have been faulted for urging the public to return to lower Manhattan in the weeks shortly after the attacks. Christine Todd Whitman, administrator of the EPA in the attacks' aftermath, was heavily criticized by a U.S. District Judge for incorrectly saying that the area was environmentally safe.[355] Mayor Giuliani was criticized for urging financial industry personnel to return quickly to the greater Wall Street area.[356]

    On December 22, 2010, the United States Congress passed the James L. Zadroga 9/11 Health and Compensation Act, which President Barack Obama signed into law on January 2, 2011. It allocated $4.2 billion to create the World Trade Center Health Program, which provides testing and treatment for people suffering from long-term health problems related to the 9/11 attacks.[357][358] The WTC Health Program replaced preexisting 9/11-related health programs such as the Medical Monitoring and Treatment Program and the WTC Environmental Health Center program.[358]

    In 2020, the NYPD confirmed that 247 NYPD police officers had died due to 9/11-related illnesses. In September 2022, the FDNY confirmed that the total number of firefighters who died due to 9/11-related illnesses was 299. Both agencies believe that the death toll will rise dramatically in the coming years. The Port Authority of New York and New Jersey Police Department (PAPD), the law enforcement agency with jurisdiction over the World Trade Center due to the Port Authority of New York and New Jersey owning the site confirmed that four of its police officers have died of 9/11-related illnesses. The chief of the PAPD at the time, Joseph Morris, made sure that industrial-grade respirators were provided to all PAPD police officers within 48 hours and decided that the same 30 to 40 police officers would be stationed at the World Trade Center pile, drastically lowering the number of total PAPD personnel who would be exposed to the air. The FDNY and NYPD had rotated hundreds, if not thousands, of different personnel from all over New York City to the pile, which exposed many of them to dust that would give them cancer or other diseases years or decades later. Also, they were not given adequate respirators and breathing equipment that could have prevented future diseases.[359][360][361][362]

    Economic
    Main article: Economic effects of the September 11 attacks
     U.S. deficit and debt increases in the seven years following the attacks from 2001 to 2008
    The attacks had a significant economic impact on the United States and world markets.[363][364] The stock exchanges did not open on September 11 and remained closed until September 17. Reopening, the Dow Jones Industrial Average (DJIA) fell 684 points, or 7.1%, to 8921, a record-setting one-day point decline.[365] By the end of the week, the DJIA had fallen 1,369.7 points (14.3%), at the time its largest one-week point drop in history. In 2001 dollars, U.S. stocks lost $1.4 trillion in valuation for the week.[366]

    In New York City, about 430,000 job months and $2.8 billion in wages were lost in the first three months after the attacks. The economic effects were mainly on the economy's export sectors.[367][368][369] The city's GDP was estimated to have declined by $27.3 billion for the last three months of 2001 and all of 2002. The U.S. government provided $11.2 billion in immediate assistance to the Government of New York City in September 2001, and $10.5 billion in early 2002 for economic development and infrastructure needs.[370]

    Also hurt were small businesses in Lower Manhattan near the World Trade Center (18,000 of which were destroyed or displaced), resulting in lost jobs and wages. Assistance was provided by Small Business Administration loans; federal government Community Development Block Grants; and Economic Injury Disaster Loans.[370] Some 31,900,000 square feet (2,960,000 m2) of Lower Manhattan office space was damaged or destroyed.[371] Many wondered whether these jobs would return, and if the damaged tax base would recover.[372] Studies of 9/11's economic effects show the Manhattan office real-estate market and office employment were less affected than first feared, because of the financial services industry's need for face-to-face interaction.[373][374]

    North American air space was closed for several days after the attacks and air travel decreased upon its reopening, leading to a nearly 20% cutback in air travel capacity, and exacerbating financial problems in the struggling U.S. airline industry.[375]

    The September 11 attacks also led to the U.S. wars in Afghanistan and Iraq,[376] as well as additional homeland security spending, totaling at least $5 trillion.[377]

    Effects in Afghanistan
    Further information: War in Afghanistan (2001–2021), Aftermath of the War in Afghanistan (2001–2021), and Killing of Ayman al-Zawahiri
    If Americans are clamouring to bomb Afghanistan back to the Stone Age, they ought to know that this nation does not have so far to go. This is a post-apocalyptic place of felled cities, parched land and downtrodden people.
    — Barry Bearak, The New York Times, September 13, 2001[378]
    Most of the Afghan population was already going hungry at the time of the September 11 attacks.[379] In the aftermath of the attacks, tens of thousands of people attempted to flee Afghanistan due to the possibility of military retaliation by the United States. Pakistan, already home to many Afghan refugees from previous conflicts, closed its border with Afghanistan on September 17, 2001.[380] Thousands of Afghans also fled to the frontier with Tajikistan, although were denied entry.[381] The Taliban leaders in Afghanistan themselves pleaded against military action, saying "We appeal to the United States not to put Afghanistan into more misery because our people have suffered so much", referring to two decades of conflict and the humanitarian crisis attached to it.[378]

    All United Nations expatriates had left Afghanistan after the attacks and no national or international aid workers were at their post. Workers were instead preparing in bordering countries like Pakistan, China and Uzbekistan to prevent a potential "humanitarian catastrophe", amid a critically low food stock for the Afghan population.[382] The World Food Programme stopped importing wheat to Afghanistan on September 12 due to security risks.[383] The Wall Street Journal suggested the creation of a buffer zone in an inevitable war, similarly as in the Bosnian War.[384]

     
     
    From left to right: U.S. soldiers engaged in the War on Terror in Afghanistan in May 2006 • Army Major General Chris Donahue left Afghanistan as the final American soldier on August 30, 2021
    Approximately one month after the attacks, the United States led a broad coalition of international forces to overthrow the Taliban regime from Afghanistan for their harboring of Al-Qaeda.[380] Though Pakistani authorities were initially reluctant to align themselves with the United States against the Taliban, they permitted the coalition access to their military bases, and arrested and handed over to the U.S. over 600 suspected Al-Qaeda members.[385][386]

    In a speech by the Nizari Ismaili Imam at the Nobel Institute in 2005, Aga Khan IV stated that the "9/11 attack on the United States was a direct consequence of the international community ignoring the human tragedy that was Afghanistan at that time".[387]

    In 2011, the U.S. and NATO under President Obama initiated a drawdown of troops in Afghanistan finalized in 2016. During the presidencies of Donald Trump and Joe Biden in 2020 and 2021, the United States alongside its NATO allies withdrew all troops from Afghanistan completing the withdrawal of all regular U.S. troops on August 30, 2021, 12 days before the 20th anniversary of the September 11 attacks,[150][388][389] The withdrawal marked the end of the 2001–2021 War in Afghanistan. Biden said that after nearly 20 years of war, it was clear that the U.S. military could not transform Afghanistan into a modern democracy.[390]

    The second emir of Al-Qaeda, Ayman al-Zawahiri, a close associate of bin Laden, was killed in a U.S. drone strike at his home in Kabul, Afghanistan on July 31, 2022.[391]

    Cultural influence
    Main article: Cultural influence of the September 11 attacks
    Further information: List of cultural references to the September 11 attacks, Entertainment affected by the September 11 attacks, and Osama bin Laden in popular culture
    See also: Osama bin Laden (elephant)
    The impact of 9/11 extends beyond geopolitics and into society and culture in general. Immediate responses to 9/11 included greater focus on home life and time spent with family, higher church attendance, and increased expressions of patriotism such as the flying of American flags.[392] The radio industry responded by removing certain songs from playlists, and the attacks have subsequently been used as background, narrative, or thematic elements in film, music, literature, and humour. Already-running television shows as well as programs developed after 9/11 have reflected post-9/11 cultural concerns.[393]

    9/11 conspiracy theories have become a social phenomenon, despite a lack of support from expert scientists, engineers, and historians.[394] 9/11 has also had a major impact on the religious faith of many individuals; for some it strengthened, to find consolation to cope with the loss of loved ones and overcome their grief; others started to question their faith or lose it entirely because they could not reconcile it with their view of religion.[395][396]

    The culture of America, after the attacks, is noted for heightened security and an increased demand thereof, as well as paranoia and anxiety regarding future terrorist attacks against most of the nation. Psychologists have also confirmed that there has been an increased amount of national anxiety in commercial air travel.[397] Anti-Muslim hate crimes rose nearly ten-fold in 2001 and have subsequently remained "roughly five times higher than the pre-9/11 rate".[398]

    Government policies towards terrorism
    Further information: War on terror, Anti-terrorism legislation, Airport security repercussions due to the September 11 attacks, and Legal issues related to the September 11 attacks
    See also: Senate Intelligence Committee report on CIA torture
     Alleged "extraordinary rendition" illegal flights of the CIA, as reported by Polish newspaper Rzeczpospolita[399]
    As a result of the attacks, many governments across the world passed legislation to combat terrorism.[400] In Germany, where several of the 9/11 terrorists had resided and taken advantage of that country's liberal asylum policies, two major anti-terrorism packages were enacted. The first removed legal loopholes that permitted terrorists to live and raise money in Germany. The second addressed the effectiveness and communication of intelligence and law enforcement.[401] Canada passed the Canadian Anti-Terrorism Act, their first anti-terrorism law.[402] The United Kingdom passed the Anti-terrorism, Crime and Security Act 2001 and the Prevention of Terrorism Act 2005.[403][404] New Zealand enacted the Terrorism Suppression Act 2002.[405]

    In the United States, the Department of Homeland Security was created by the Homeland Security Act of 2002 to coordinate domestic anti-terrorism efforts. The USA Patriot Act gave the federal government greater powers, including the authority to detain foreign terror suspects for a week without charge; to monitor terror suspects' telephone communications, e-mail, and Internet use; and to prosecute suspected terrorists without time restrictions. The FAA ordered that aeroplane cockpits be reinforced to prevent terrorists from gaining control of planes and assigned sky marshals to flights.

    Further, the Aviation and Transportation Security Act made the federal government, rather than airports, responsible for airport security. The law created the Transportation Security Administration to inspect passengers and luggage, causing long delays and concern over passenger privacy.[406] After suspected abuses of the USA Patriot Act were brought to light in June 2013 with articles about the collection of American call records by the NSA and the PRISM program (see Global surveillance disclosures (2013–present)), Representative Jim Sensenbrenner,(R- Wisconsin) who introduced the Patriot Act in 2001, said that the NSA overstepped its bounds.[407][408]

    Criticism of the war on terror has focused on its morality, efficiency, and cost. According to a 2021 study conducted under the auspices of the Watson Institute for International and Public Affairs, the several post-9/11 wars participated in by the United States in its War on Terror have caused the displacement, conservatively calculated, of 38 million people in Afghanistan, Pakistan, Iraq, Libya, Syria, Yemen, Somalia, and the Philippines.[409][410][411] The study estimated these wars caused the deaths of 897,000 to 929,000 people and cost $8 trillion.[411] The U.S. Constitution and U.S. law prohibits the use of torture, yet such human rights violations occurred during the War on Terror under the euphemism "enhanced interrogation".[412][413] In 2005, The Washington Post and Human Rights Watch (HRW) published revelations concerning CIA flights and "black sites", covert prisons operated by the CIA.[414][415] The term "torture by proxy" is used by some critics to describe situations in which the CIA and other U.S. agencies have transferred suspected terrorists to countries known to employ torture.[416][417]

    Legal proceedings
    Main articles: Trials related to the September 11 attacks and United States v. Khalid Sheikh Mohammed
    As all 19 hijackers died in the attacks, they were never prosecuted. Osama bin Laden was never formally indicted but was after a 10-year manhunt killed by U.S. special forces on May 2, 2011 in his compound in Abbottabad, Pakistan.[l][418] The main trial of the attacks against Mohammed and his co-conspirators Walid bin Attash, Ramzi bin al-Shibh, Ammar al-Baluchi, and Mustafa Ahmad al Hawsawi remains unresolved. Khalid Sheikh Mohammed was arrested on March 1, 2003, in Rawalpindi, Pakistan, by Pakistani security officials working with the CIA. He was then held at multiple CIA secret prisons and Guantanamo Bay, where he was interrogated and tortured with methods including waterboarding.[419][420] In 2003, Mustafa al-Hawsawi and Abd al-Aziz Ali were arrested and transferred to US custody. Both would later be accused of providing money and travel assistance to the hijackers.[421] During U.S. hearings at Guantanamo Bay in March 2007, Mohammed again confessed his responsibility for the attacks, stating he "was responsible for the 9/11 operation from A to Z" and that his statement was not made under duress.[42][422] In January 2023, the US government opened up about a potential plea deal,[423] with Biden giving up on the effort in September that year.[424]

    To date, only peripheral persons have thus been convicted for charges in connection with the attacks. These include:

    Zacarias Moussaoui who was indicted in December 2001 and sentenced to life in prison without the possibility of parole in May 2006 by a U.S. federal jury
    Mounir El Motassadeq who was first convicted in February 2003 by a Federal Court of Justice in Germany and was deported to Morocco in October 2018 after serving his sentence[425]
    Abu Dahdah who was arrested in November 2001, sentenced by a Spanish High Court and released from prison in May 2013.[426]
    Investigations
    FBI
    Further information: Hijackers in the September 11 attacks
    Immediately after the attacks, the Federal Bureau of Investigation started PENTTBOM, the largest criminal inquiry in United States history. At its height, more than half of the FBI's agents worked on the investigation and followed a half-million leads.[427] The FBI concluded that there was "clear and irrefutable" evidence linking Al-Qaeda and bin Laden to the attacks.[428]

     Mohamed Atta was one of the main planners of the attacks and the operational leader, responsible for crashing Flight 11 into the North Tower
    The FBI quickly identified the hijackers, including leader Mohamed Atta, when his luggage was discovered at Boston's Logan Airport. Atta had been forced to check two of his three bags due to space limitations on the 19-seat commuter flight he took to Boston. Due to a new policy instituted to prevent flight delays, the luggage failed to make it aboard American Airlines Flight 11 as planned. The luggage contained the hijackers' names, assignments, and Al-Qaeda connections. "It had all these Arab-language [sic] papers that amounted to the Rosetta stone of the investigation", said one FBI agent.[429] Within hours of the attacks, the FBI released the names and in many cases the personal details of the suspected pilots and hijackers.[430][431] Abu Jandal, who served as bin Laden's chief bodyguard for years, confirmed the identity of seven hijackers as Al-Qaeda members during interrogations with the FBI on September 17. He had been jailed in a Yemeni prison since 2000.[432][433] On September 27, 2001, photos of all 19 hijackers were released, along with information about possible nationalities and aliases.[434] Fifteen of the men were from Saudi Arabia, two were from the United Arab Emirates, one was from Egypt, and one was from Lebanon.[435]

    By midday, the U.S. National Security Agency and German intelligence agencies had intercepted communications pointing to Osama bin Laden.[436] Two of the hijackers were known to have traveled with a bin Laden associate to Malaysia in 2000[437] and hijacker Mohamed Atta had previously gone to Afghanistan.[438] He and others were part of a terrorist cell in Hamburg.[439] One of the members of the Hamburg cell in Germany was discovered to have been in communication with Khalid Sheikh Mohammed who was identified as a member of Al-Qaeda.[440]

    Authorities in the United States and the United Kingdom also obtained electronic intercepts, including telephone conversations and electronic bank transfers, which indicated that Mohammed Atef, a bin Laden deputy, was a key figure in the planning of the 9/11 attacks. Intercepts were also obtained that revealed conversations that took place days before September 11 between bin Laden and an associate in Pakistan. In those conversations, the two referred to "an incident that would take place in America on, or around, September 11" and they discussed potential repercussions. In another conversation with an associate in Afghanistan, bin Laden discussed the "scale and effects of a forthcoming operation". These conversations did not specifically mention the World Trade Center, the Pentagon, or other specifics.[441]



    Origins of the 19 hijackers
    Nationality
    Number
    Saudi Arabia
     
    15
    United Arab Emirates
     
    2
    Egypt
     
    1
    Lebanon
     
    1
    In their annual violent crime index for the year 2001, the FBI recorded the deaths from the attacks as murder, in separate tables so as not to mix them with other reported crimes for that year.[442] In a disclaimer, the FBI stated that "the number of deaths is so great that combining it with the traditional crime statistics will have an outlier effect that falsely skews all types of measurements in the program's analyses".[443] New York City also did not include the deaths in their annual crime statistics for 2001.[444]

    CIA
    Further information: September 11 intelligence before the attacks
    In 2004, John L. Helgerson, the Inspector General of the Central Intelligence Agency (CIA), conducted an internal review of the agency's pre-9/11 performance and was harshly critical of senior CIA officials for not doing everything possible to confront terrorism.[445] According to Philip Giraldi in The American Conservative, Helgerson criticized their failure to stop two of the 9/11 hijackers, Nawaf al-Hazmi and Khalid al-Mihdhar, as they entered the United States and their failure to share information on the two men with the FBI.[446]

    In May 2007, senators from both major U.S. political parties (the Republican and Democratic party) drafted legislation to make the review public. One of the backers, Senator Ron Wyden said, "The American people have a right to know what the Central Intelligence Agency was doing in those critical months before 9/11".[447] The report was released in 2009 by President Barack Obama.[445]

    Congressional inquiry
    Main article: Joint Inquiry into Intelligence Community Activities before and after the Terrorist Attacks of September 11, 2001
    In February 2002, the Senate Select Committee on Intelligence and the House Permanent Select Committee on Intelligence formed a joint inquiry into the performance of the U.S. Intelligence Community.[448] Their 832-page report released in December 2002[449] detailed failings of the FBI and CIA to use available information, including about terrorists the CIA knew were in the United States, to disrupt the plots.[450] The joint inquiry developed its information about possible involvement of Saudi Arabian government officials from non-classified sources.[451] Nevertheless, the Bush administration demanded 28 related pages remain classified.[450] In December 2002, the inquiry's chair Bob Graham (D-FL) revealed in an interview that there was "evidence that there were foreign governments involved in facilitating the activities of at least some of the terrorists in the United States".[452] September 11 victim families were frustrated by the unanswered questions and redacted material from the congressional inquiry and demanded an independent commission.[450] September 11 victim families,[453] members of Congress[454] and the Saudi Arabian government are still seeking the release of the documents.[455][456] In June 2016, CIA chief John Brennan said that he believes 28 redacted pages of a congressional inquiry into 9/11 will soon be made public, and that they will prove that the government of Saudi Arabia had no involvement in the September 11 attacks.[457]

    In September 2016, Congress passed the Justice Against Sponsors of Terrorism Act that would allow relatives of victims of the September 11 attacks to sue Saudi Arabia for its government's alleged role in the attacks.[458][459][460]

    9/11 Commission
    Main articles: 9/11 Commission and 9/11 Commission Report
    See also: Criticism of the 9/11 Commission
     The cover of the 9/11 Commission Report, a 585-page report released in 2004, on events leading up to the September 11 attacks and steps recommended to avoid a future terrorist attack
    The National Commission on Terrorist Attacks Upon the United States, popularly known as the 9/11 Commission, chaired by Thomas Kean, governor of New Jersey from 1982 to 1990,[m] was formed in late 2002 to prepare a thorough account of the circumstances surrounding the attacks, including preparedness for and the immediate response to the attacks.[465] On July 22, 2004, the commission issued the 9/11 Commission Report, a 585-page report based on its investigations and interviews. The report detailed the events leading up to the September 11 attacks, concluding that they were carried out by Al-Qaeda. The commission also examined how security and intelligence agencies were inadequately coordinated to prevent the attacks.

    According to the report, "We believe the 9/11 attacks revealed four kinds of failures: in imagination, policy, capabilities, and management".[466] The commission made numerous recommendations on how to prevent future attacks, and in 2011 was dismayed that several of its recommendations had yet to be implemented.[467]

    National Institute of Standards and Technology
    Main article: NIST World Trade Center Disaster Investigation
    See also: 7 World Trade Center § 9/11 and collapse
     The exterior support columns from the lower level of the South Tower remained standing after the building collapsed
    The U.S. National Institute of Standards and Technology (NIST) investigated the collapses of the Twin Towers and 7 WTC. The investigations examined why the buildings collapsed and what fire protection measures were in place, and evaluated how fire protection systems might be improved in future construction.[468] The investigation into the collapse of 1 WTC and 2 WTC was concluded in October 2005 and that of 7 WTC was completed in August 2008.[469]

    NIST found that the fireproofing on the Twin Towers' steel infrastructures was blown off by the initial impact of the planes and that had this not occurred, the towers likely would have remained standing.[470] A 2007 study of the north tower's collapse published by researchers of Purdue University determined that since the plane's impact had stripped off much of the structure's thermal insulation, the heat from a typical office fire would have softened and weakened the exposed girders and columns enough to initiate the collapse regardless of the number of columns cut or damaged by the impact.[471][472]

    The director of the original investigation stated that "the towers did amazingly well. The terrorist aircraft didn't bring the buildings down; it was the fire that followed. It was proven that you could take out two-thirds of the columns in a tower and the building would still stand".[473] The fires weakened the trusses supporting the floors, making the floors sag. The sagging floors pulled on the exterior steel columns causing the exterior columns to bow inward.

    With the damage to the core columns, the buckling exterior columns could no longer support the buildings, causing them to collapse. Additionally, the report found the towers' stairwells were not adequately reinforced to provide adequate emergency escape for people above the impact zones.[474] NIST concluded that uncontrolled fires in 7 WTC caused floor beams and girders to heat and subsequently "caused a critical support column to fail, initiating a fire-induced progressive collapse that brought the building down".[469]

    Alleged Saudi government role
    Main article: Alleged Saudi government role in the September 11 attacks
    See also: Saudi Arabia–United States relations, Saudi Arabia and state-sponsored terrorism, and The 28 pages
    In July 2016, the Obama administration released a document compiled by U.S. investigators Dana Lesemann and Michael Jacobson, known as "File 17",[475] which contains a list naming three dozen people, including the suspected Saudi intelligence officers attached to Saudi Arabia's embassy in Washington, D.C.,[476] which connects Saudi Arabia to the hijackers.[477][478]

    In September 2016, Congress passed the Justice Against Sponsors of Terrorism Act.[479][480] The practical effect of the legislation was to allow the continuation of a longstanding civil lawsuit brought by families of victims of the September 11 attacks against Saudi Arabia for its government's alleged role in the attacks.[481] In March 2018, a U.S. judge formally allowed a suit to move forward against the government of Saudi Arabia brought by 9/11 survivors and victims' families.[479]

    In 2022, the families of some 9/11 victims obtained two videos and a notepad seized from Saudi national Omar al-Bayoumi by the British courts. The first video showed him hosting a party in San Diego for Nawaf al-Hazmi and Khalid al-Mihdhar, the first two hijackers to arrive in the U.S. The other video showed al-Bayoumi greeting the cleric Anwar al-Awlaki, who was blamed for radicalizing Americans and later killed in a CIA drone strike. The notepad depicted a hand-drawn aeroplane and some mathematical equations that, according to a pilot's court statement, might have been used to calculate the rate of descent to get to a target. According to a 2017 FBI memo, from the late 1990s up until the 9/11 attack, al-Bayoumi was a paid cooptee of the Saudi General Intelligence Presidency. As of April 2022 he is believed to be living in Saudi Arabia, which has denied any involvement in 9/11.[482]

    Rebuilding and memorials
    Reconstruction
    Main articles: Rescue and recovery effort after the September 11 attacks on the World Trade Center and Construction of One World Trade Center
    Further information: World Trade Center (2001–present) and World Trade Center site
     The rebuilt World Trade Center, September 2020
    On the day of the attacks, New York City mayor Rudy Giuliani stated: "We will rebuild. We're going to come out of this stronger than before, politically stronger, economically stronger. The skyline will be made whole again".[483]

    Within hours of the attack, a substantial search and rescue operation was launched. After months of around-the-clock operations, the World Trade Center site was cleared by the end of May 2002.[484] The damaged section of the Pentagon was rebuilt and occupied within a year of the attacks.[485] The temporary World Trade Center PATH station opened in late 2003 and construction of the new 7 World Trade Center was completed in 2006. Work on rebuilding the main World Trade Center site was delayed until late 2006 when leaseholder Larry Silverstein and the Port Authority of New York and New Jersey agreed on financing.[486] The construction of One World Trade Center began on April 27, 2006, and reached its full height on May 20, 2013. The spire was installed atop the building at that date, putting One WTC's height at 1,776 feet (541 m) and thus claiming the title of the tallest building in the Western Hemisphere.[487][488] One WTC finished construction and opened on November 3, 2014.[488][489][490]

    On the World Trade Center site, three more office towers were to be built one block east of where the original towers stood.[491] 4 WTC, meanwhile, opened in November 2013, making it the second tower on the site to open behind 7 World Trade Center, as well as the first building on the Port Authority property.[492] 3 WTC opened on June 11, 2018, becoming the fourth skyscraper at the site to be completed.[493] In December 2022, the Nicholas Greek Orthodox Church fully reopened for regular services[494] followed by the opening of the Ronald O. Perelman Performing Arts Center in September 2023.[495] With construction beginning in 2008,[496] 2 World Trade Center remains as of 2023 unfinished.[497] Construction of a 5 World Trade Center is planned to begin in 2024 and be finished by 2029.[498][499]

    Christopher O. Ward, Port Authority of New York and New Jersey Executive Director from 2008 to 2011, is a survivor of the attacks and is credited with getting the construction of the 9/11 site back on track.[500]

    Memorials
    Main article: Memorials and services for the September 11 attacks
     The National September 11 Memorial and Museum in Lower Manhattan, August 2016
    In the days immediately following the attacks, many memorials and vigils were held around the world, and photographs of the dead and missing were posted around Ground Zero. A witness described being unable to "get away from faces of innocent victims who were killed. Their pictures are everywhere, on phone booths, street lights, and walls of subway stations. Everything reminded me of a huge funeral, people were quiet and sad, but also very nice. Before, New York gave me a cold feeling; now people were reaching out to help each other".[501] President Bush proclaimed Friday, September 14, 2001 as Patriot Day.[502]

     Tribute in Light, featuring two columns of light representing the Twin Towers, September 2020
    One of the first memorials was the Tribute in Light, an installation of 88 searchlights at the footprints of the World Trade Center towers.[503] In New York City, the World Trade Center Site Memorial Competition was held to design an appropriate memorial on the site.[504] The winning design, Reflecting Absence, was selected in August 2006, and consists of a pair of reflecting pools in the footprints of the towers, surrounded by a list of the victims' names in an underground memorial space.[505] The memorial was completed on September 11, 2011;[506] a museum also opened on site on May 21, 2014.[507]

    The Sphere by the German sculptor Fritz Koenig is the world's largest bronze sculpture of modern times, and stands between the Twin Towers on the Austin J. Tobin Plaza of the World Trade Center in New York City from 1971 until the terrorist attacks on September 11, 2001. The sculpture, weighing more than 20 tons, was the only remaining work of art to be recovered largely intact from the ruins of the collapsed Twin Towers after the attacks. Since then, the work of art, known in the U.S. as The Sphere, has been transformed into an important symbolic monument of 9/11 commemoration. After being dismantled and stored near a hangar at John F. Kennedy International Airport, the sculpture was the subject of the 2001 documentary The Sphere by filmmaker Percy Adlon. On August 16, 2017, the work was reinstated, installed at the Liberty Park, close to the new World Trade Center aerial and the 9/11 Memorial.[508]

     The National 9/11 Pentagon Memorial in Arlington County, Virginia, September 2008
    In Arlington County, the Pentagon Memorial was completed and opened to the public on the seventh anniversary of the attacks in 2008.[509][510] It consists of a landscaped park with 184 benches facing the Pentagon.[511] When the Pentagon was repaired in 2001–2002, a private chapel and indoor memorial were included, located at the spot where Flight 77 crashed into the building.[512]

    In Shanksville, a concrete-and-glass visitor center was opened on September 10, 2015,[513] situated on a hill overlooking the crash site and the white marble Wall of Names.[514] An observation platform at the visitor centre and the white marble wall are both aligned beneath the path of Flight 93.[514][515] A temporary memorial is located 500 yards (457 m) from the crash site.[516] New York City firefighters donated a cross made of steel from the World Trade Center and mounted on top of a platform shaped like the Pentagon.[517] It was installed outside the firehouse on August 25, 2008.[518] Many other permanent memorials are elsewhere. Scholarships and charities have been established by the victims' families and by many other organizations and private figures.[519]

    On every anniversary in New York City, the names of the victims who died there are read out against a background of sombre music. The President of the United States attends a memorial service at the Pentagon,[520] and asks Americans to observe Patriot Day with a moment of silence. Smaller services are held in Shanksville, Pennsylvania, which are usually attended by the First Lady. In September 2023, President Joe Biden did not attend services in the affected areas, instead marking the day in Anchorage, Alaska, the first US President to do so since the attacks.[521][522][523]

     
    See also
    9/11 Commission
    9/11 Commission Report
    Air France Flight 8969
    Bojinka plot
    Delta 1989 and Korean 085, two other flights that were falsely suspected of being hijacked as part of the September 11 attacks
    List of cultural references to the September 11 attacks
    Khobar Towers bombing
    List of attacks on U.S. territory
    List of aviation incidents involving terrorism
    List of deadliest terrorist attacks in the United States
    List of Islamist terrorist attacks
    List of major terrorist incidents
    List of terrorist incidents in 2001
    List of terrorist incidents in New York CityOutline of the September 11 attacks
    Timeline of al-Qaeda attacks
    Timeline of the September 11 attacks
    USS Cole bombing
    1993 World Trade Center bombing
    1998 United States embassy bombing
    2006 transatlantic aircraft plot
    2007 John F. Kennedy International Airport attack plot
    2009 Bronx terrorism plot
    2010 transatlantic aircraft bomb plot
    2023 Israel–Hamas war
    2004 Madrid train bombings
    References
    Notes
    ^ Other, secondary attack locations include the airspaces of Massachusetts, New Jersey, Ohio, Kentucky and West Virginia.
    ^ The hijackers began their first attack at around 08:13 a.m., when a group of five took control of American Airlines Flight 11, injuring two people and murdering one before forcing their way into the cockpit.
    ^ The fourth and final hijacked plane of the attacks crashed in a Pennsylvania field at 10:03 a.m., which concluded the attacks since all the attackers were now dead and all of the hijacked planes were destroyed. However, the attackers' damage continued as the North Tower kept burning for an additional 25 minutes until it ultimately collapsed by 10:28 a.m.
    ^ Sources vary regarding the number of injuries―some say 6,000[1] while others go as high as 25,000.[2]
    ^ The expression 9/11 is typically pronounced "nine eleven" in English, even including places that use the opposite numerical dating convention; the slash is not pronounced.
    ^ The exact time is disputed. The 9/11 Commission Report states that Flight 11 struck the North Tower at 08:46:40 a.m.,[3] NIST reports 08:46:30 a.m.,[4] and some other sources claim 08:46:26 a.m.[5]
    ^ Jump up to:a b c The exact time is disputed. The 9/11 Commission Report states that Flight 175 struck the South Tower at 09:03:11 a.m.,[6][7] NIST reports 09:02:59 a.m.,[8] and some other sources claim 09:03:02 a.m.[9] In any case, the 16-minute gap between each impact is rounded to 17.[10]
    ^ Jump up to:a b While NIST and the 9/11 Commission give differing accounts of the exact second of the North Tower's collapse initiation, with NIST placing it at 10:28:22 a.m.[11][12] and the commission at 10:28:25 a.m.,[13] it is generally accepted that Flight 11 did not strike the North Tower any sooner than 8:46:26 a.m.,[5] so the time it took for the North Tower to collapse was just shy of 102 minutes either way.
    ^ NIST and the 9/11 Commission both state that the collapse began at 9:58:59 a.m., which is rounded to 9:59[148]: 84 [147]: 322  for simplicity. If the commission's claim that the South Tower was struck at 9:03:11 is to be believed, then the collapse began 55 minutes and 48 seconds after the crash, not 56 minutes.
    ^ The exact time of the North Tower's collapse initiation is disputed, with NIST dubbing the moment it began to collapse as being 10:28:22 a.m.[149] and the 9/11 Commission recording the time as 10:28:25.[150]: 329 
    ^ The massacre at Camp Speicher―often described as the second deadliest act of terrorism in history after 9/11―is said to have killed between 1,095 and 1,700 people.[161] The upper estimate would tie it with the attack on the World Trade Center's North Tower, but until the true death toll of the massacre becomes known, then the hijacking and crash of Flight 11 was the deadliest act of terrorism on record.
    ^ President Barack Obama announced his death on May 1. At the time of the raid, it was early morning of May 2 in Pakistan and late afternoon of May 1 in the U.S.
    ^ Former Secretary of State Henry Kissinger was initially appointed to head the commission[461] but resigned only weeks after being appointed, to avoid conflicts of interest.[462] Former U.S. Senator George Mitchell was originally appointed as the vice chairman, but he stepped down on December 10, 2002, not wanting to sever ties to his law firm.[463] On December 15, 2002, Bush appointed former New Jersey Governor Tom Kean to head the commission.[464]
    Citations
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    ^ National Institute of Standards and Technology (2005). "Final report on the collapse of the World Trade Center" (PDF). NIST: 69. Archived (PDF) from the original on July 7, 2021. Retrieved December 7, 2023.
    ^ Jump up to:a b "102 Minutes: Last Words at the Trade Center; Fighting to Live as the Towers Die". The New York Times. May 26, 2002. Archived from the original on September 12, 2009. Retrieved June 23, 2023.
    ^ Final Report of the 9/11 Commission on Terrorist Attacks Upon the United States (PDF) (Report). National Commission on Terrorist Attacks Upon the United States. July 22, 2004. pp. 7–8. Archived (PDF) from the original on August 16, 2021. Retrieved August 15, 2021.
    ^ Staff Report of the 9/11 Commission on Terrorist Attacks upon the United States (PDF) (Report). National Commission on Terrorist Attacks Upon the United States. September 2005 [August 26, 2004]. p. 24. Archived (PDF) from the original on July 12, 2014. Retrieved August 15, 2021.
    ^ Building and Fire Research Laboratory (September 2005). Visual Evidence, Damage Estimates, and Timeline Analysis (PDF) (Report). National Institute of Standards and Technology, United States Department of Commerce. p. 27. Archived (PDF) from the original on September 11, 2021. Retrieved August 24, 2021.
    ^ "Timeline for United Airlines Flight 175". NPR. June 17, 2004. Archived from the original on August 24, 2021. Retrieved August 24, 2021.
    ^ 9/11 Commission 2004a, p. 302.
    ^ "9/11/01 timeline: How the September 11, 2001 attacks unfolded". WPVI-TV. September 11, 2023. Archived from the original on November 5, 2023. Retrieved November 4, 2023.
    ^ National Institute of Standards and Technology (2005). "Final report on the collapse of the World Trade Center" (PDF). NIST: 229. Archived (PDF) from the original on July 7, 2021. Retrieved December 7, 2023.
    ^ 9/11 Final Report of the National Commission (2004). Collapse of WTC1 (PDF). p. 329. Archived (PDF) from the original on September 12, 2017. Retrieved December 7, 2023.
    ^ Baker, Peter; Cooper, Helene; Barnes, Julian; Schmitt, Eric (August 1, 2022). "U.S. Drone Strike Kills Ayman al-Zawahri, Top Qaeda Leader". The New York Times. Archived from the original on August 1, 2022. Retrieved August 1, 2022.
    ^ Jump up to:a b Gunaratna, Ronan (2002). Inside Al Qaeda. Berkley Books.
    ^ Formichi, Chiara (2020). Islam as Resistance. Cambridge University Press. p. 206.
    ^ Hafez, Mohammed M. (March 2008). "Jihad After Iraq: Lessons from the Arab Afghans Phenomenon". CTC Sentinel. Vol. 1, no. 4. Archived from the original (PDF) on May 8, 2011.
    ^ "Al-Qaeda's origins and links". BBC News. July 20, 2004. Archived from the original on August 2, 2019. Retrieved September 3, 2011.
    ^ Coll, Steve (2004). Ghost Wars: The Secret History of the CIA, Afghanistan, and Bin Laden, from the Soviet Invasion to September 10, 2001. Penguin Group. pp. 144–145, 238. ISBN 9781594200076.
    ^ Bergen (2006), pp. 60–61.
    ^ "Bin Laden's fatwā (1996)". PBS. Archived from the original on October 31, 2001. Retrieved May 29, 2014.
    ^ Jump up to:a b c d "Al Qaeda's Second Fatwa". PBS NewsHour. PBS. Archived from the original on November 28, 2013. Retrieved May 29, 2014.
    ^ Logevall, Fredrik (2002). Terrorism and 9/11: A Reader. New York: Houghton Mifflin Company. ISBN 0-618-25535-4.
    ^ "The Hamburg connection". BBC News. August 19, 2005. Archived from the original on May 30, 2013. Retrieved June 26, 2011.
    ^ "5 Al Qaeda Aims at the American Homeland". 9/11 Commission. Archived August 16, 2009, at the Wayback Machine.
    ^ Miller, John. ""Greetings, America. My name is Osama Bin Laden..."". Frontline. PBS. Archived from the original on November 24, 2023. Retrieved December 7, 2023.
    ^ Miller, John. ""Greetings, America. My name is Osama Bin Laden..."". PBS. Archived from the original on February 11, 2001.
    ^ Jump up to:a b "Bin Laden claims responsibility for 9/11". CBC News. October 29, 2004. Archived from the original on February 18, 2010. Retrieved September 1, 2011. Al-Qaeda leader Osama bin Laden appeared in a new message aired on an Arabic TV station Friday night, for the first time claiming direct responsibility for the 2001 attacks against the United States.
    ^ "Pakistan inquiry orders Bin Laden family to remain". BBC News. July 6, 2011. Archived from the original on November 30, 2019. Retrieved September 3, 2011.
    ^ "Full transcript of bin Laden's speech". Al Jazeera. November 2, 2004. Archived from the original on June 13, 2007. Retrieved September 3, 2011.
    ^ "Pakistan to Demand Taliban Give Up Bin Laden as Iran Seals Afghan Border". Fox News. September 16, 2001. Archived from the original on May 23, 2010. Retrieved September 3, 2011.
    ^ "Bin Laden on tape: Attacks 'benefited Islam greatly'". CNN. December 14, 2001. Archived from the original on December 27, 2007. Retrieved November 24, 2013. Reveling in the details of the fatal attacks, bin Laden brags in Arabic that he knew about them beforehand and said the destruction went beyond his hopes. He says the attacks "benefited Islam greatly".
    ^ "Transcript: Bin Laden video excerpts". BBC News. December 27, 2001. Archived from the original on July 27, 2019. Retrieved September 3, 2011.
    ^ Bin Ladin, Osama (November 1, 2004). "Full transcript of bin Ladin's speech". Al Jazeera. Archived from the original on November 1, 2020. Retrieved June 3, 2023.
    ^ "Bin Laden Dead – Where Are Other 9/11 Planners?". ABC News. May 2, 2011. Archived from the original on May 4, 2011. Retrieved February 2, 2019. While initially denying responsibility for the 9/11 attacks, Bin Laden took responsibility for them in a 2004 taped statement, saying that he had personally directed the hijackers.
    ^ "Bin Laden claims responsibility for 9/11". CBC News. October 29, 2004. Archived from the original on February 18, 2010. Retrieved February 2, 2019.
    ^ "Bin Laden 9/11 planning video aired". CBC News. September 7, 2006. Archived from the original on October 13, 2007. Retrieved September 3, 2011.
    ^ Clewley, Robin (September 27, 2001). "How Osama Cracked FBI's Top 10". Wired. Archived from the original on May 26, 2008. Retrieved May 29, 2014.
    ^ "Usama Bin Laden". Federal Bureau of Investigation. Archived from the original on October 11, 2010. Retrieved September 10, 2011.
    ^ "We left out nuclear targets, for now". The Guardian. London. March 4, 2003. Archived from the original on January 23, 2008. Retrieved September 3, 2011. Yosri Fouda of the Arabic television channel al-Jazeera is the only journalist to have interviewed Khalid Sheikh Mohammed, the al-Qaeda military commander arrested at the weekend.
    ^ Leonard, Tom; Spillius, Alex (October 10, 2008). "Alleged 9/11 mastermind wants to confess to plot". The Daily Telegraph. London. Archived from the original on January 10, 2022. Retrieved September 3, 2011.
    ^ Jump up to:a b "September 11 suspect 'confesses'". Al Jazeera. March 15, 2007. Archived from the original on September 27, 2019. Retrieved September 3, 2011.
    ^ 9/11 Commission Report (2004), p. 147.
    ^ "White House power grabs". The Washington Times. August 26, 2009. Archived from the original on December 5, 2019. Retrieved September 3, 2011.
    ^ Van Voris, Bob; Hurtado, Patricia (April 4, 2011). "Khalid Sheikh Mohammed Terror Indictment Unsealed, Dismissed". Bloomberg BusinessWeek. Archived from the original on April 17, 2011. Retrieved September 3, 2011.
    ^ Wright 2006, p. [page needed].
    ^ "Substitution for Testimony of Khalid Sheikh Mohammed" (PDF). United States District Court for the Eastern District of Virginia. 2006. p. 24. Archived from the original (PDF) on October 26, 2019. Retrieved September 3, 2011.
    ^ "[Text of] Bin Laden's [1996] Fatwa". PBS NewsHour. Archived from the original on April 19, 2014. Retrieved June 14, 2014.
    ^ Gunarathna, pp. 61–62.
    ^ Bin Laden, Osama (2005). "Declaration of Jihad". In Lawrence, Bruce (ed.). Messages to the World: The Statements of Osama bin Laden. 6 Meard Street, London W1F OEG: Verso. pp. 139, 140, 141. ISBN 1-84467-045-7. The targets of September 11 were not women and children. The main targets were the symbol of the United States: their economic and military power.
    ^ "'Muslims have the right to attack America'". The Guardian. November 10, 2001. Archived from the original on August 25, 2013.
    ^ Jump up to:a b *"Full transcript of bin Ladin's speech". Al Jazeera. Archived from the original on January 1, 2016. Retrieved April 10, 2012.bin Laden, Osama (November 24, 2002). "Full text: bin Laden's 'letter to America'". The Observer. London. Archived from the original on July 28, 2013. Retrieved September 3, 2011.
    ^ Jump up to:a bMearsheimer (2007), p. 67.
    Kushner (2003), p. 389.
    Murdico (2003), p. 64.
    Kelley (2006), p. 207.
    Ibrahim (2007), p. 276.
    Berner (2007), p. 80
    ^ "Full text: bin Laden's 'letter to America'". The Guardian. November 24, 2002. Archived from the original on October 8, 2014. Retrieved January 7, 2019. The blood pouring out of Palestine must be equally revenged. You must know that the Palestinians do not cry alone; their women are not widowed alone; their sons are not orphaned alone... American people have chosen, consented to, and affirmed their support for the Israeli oppression of the Palestinians, the occupation and usurpation of their land, and its continuous killing, torture, punishment and expulsion of the Palestinians. The American people have the ability and choice to refuse the policies of their government and even to change them if they want. (b) The American people are the ones who pay the taxes that fund the planes that bomb us in Afghanistan, the tanks that strike and destroy our homes in Palestine, the armies that occupy our lands in the Arabian Gulf, and the fleets that ensure the blockade of Iraq.
    ^ Riedel, Bruce (2008). "1: The Manhattan Raid". The Search for Al Qaeda. Massachusetts Avenue, N.W., Washington, DC, US: Brookings Institution Press. pp. 5, 6. ISBN 978-0-8157-0451-5. The Palestinian intifada, the fierce uprising in the fall of 2000 on the West Bank and Gaza, was a particularly powerful motivating event for.. bin Laden... The intifada's power over bin Laden's thinking about the 9/11 raid is underscored by his repeated attempts to push KSM to advance the timing of the crashes. In September of 2000, he urged KSM to tell Atta to attack immediately to respond to the Sharon visit to the holy sites in Jerusalem; Atta told bin Laden he was not ready yet. When bin Laden learned that Sharon, who had become Israel's prime minister in March 2001, was going to visit the White House early that summer, he again pressed Atta to attack immediately. And again Atta demurred, arguing he needed more time to get the plan and the team ready to go.
    ^ Holbrook, Donald (2014). The Al-Qaeda Doctrine. New York, NY, US: Bloomsbury. p. 145. ISBN 978-1-62356-314-1.
    ^ J. Greenberg, Karen (2005). "October 21, 2001 – Interview with Tayseer Alouni". Al Qaeda Now. New York, US: Cambridge University Press. pp. 192–206. ISBN 978-0-521-85911-0. Last year's blessed intifada helped us to push more for the Palestinian issue. This push helps the other cause. Attacking America helps the cause of Palestine and vice versa. No conflict between the two; on the contrary, one serves the other.
    ^ *Plotz, David (2001) What Does Osama Bin Laden Want? Archived November 15, 2016, at the Wayback Machine, SlateBergen (2001), p. 3
    Yusufzai, Rahimullah (September 26, 2001). "Face to face with Osama". The Guardian. London. Archived from the original on January 19, 2008. Retrieved September 3, 2011.
    "US pulls out of Saudi Arabia". BBC News. April 29, 2003. Archived from the original on December 25, 2018. Retrieved September 3, 2011.
    "Saga of Dr. Zawahri Sheds Light on the Roots of al Qaeda Terror". The Wall Street Journal. July 2, 2002. Archived from the original on December 30, 2018. Retrieved September 3, 2011.
    "Tenth Public Hearing, Testimony of Louis Freeh". 9/11 Commission. April 13, 2004. Archived from the original on December 25, 2018. Retrieved September 3, 2011.
    "Jihad Against Jews and Crusaders: World Islamic Front Statement". Federation of American Scientists. February 23, 1998. Archived from the original on April 21, 2010. Retrieved September 3, 2011.
    ^ "Full text: bin Laden's 'letter to America'". The Guardian. London. November 24, 2002. Archived from the original on April 18, 2010. Retrieved April 26, 2010.
    ^ "Osama bin Laden's aide Ayman al-Zawahiri rants on global warming – Mirror.co.uk". Daily Mirror. Archived from the original on May 11, 2008. Retrieved May 14, 2023.
    ^ Kates, Brian (January 30, 2010). "Al Qaeda leader Osama Bin Laden blasts U.S. in audiotape spewing hate for... global warming". New York Daily News. Archived from the original on February 1, 2010. Retrieved December 7, 2023.
    ^ "Full transcript of bin Laden's 'Letter to America'". The Guardian. London. November 24, 2002. Archived from the original on April 26, 2019. Retrieved September 3, 2011.
    ^ bin Laden, Osama. "Full transcript of bin Ladin's speech". Al Jazeera. Archived from the original on January 1, 2016. Retrieved April 10, 2012. So I shall talk to you about the story behind those events and shall tell you truthfully about the moments in which the decision was taken, for you to consider
    ^ Bruce Lawrence, ed. (2005). Messages to the World: The Statements of Osama bin Laden. 6 Meard Street, London W1F OEG: Verso. p. 119. ISBN 1-84467-045-7.
    ^ Bergen, Peter L. (2005). Holy War, Inc.: Inside the Secret World of Osama Bin Laden. New York: Simon and Schuster. ISBN 978-0-7432-3467-2. Retrieved March 20, 2020.
    ^ Jump up to:a b "1998 Al Qaeda fatwā". Federation of American Scientists (FAS). February 23, 1998. Archived from the original on April 21, 2010. Retrieved September 3, 2011.
    ^ Jump up to:a b Yusufzai, Rahimullah (September 26, 2001). "Face to face with Osama". The Guardian. London. Archived from the original on January 19, 2008. Retrieved September 3, 2011.
    ^ Pape, Robert A. (2005). Dying to Win: The Strategic Logic of Suicide Terrorism. New York: Random House. ISBN 978-0-8129-7338-9. Retrieved March 20, 2020.
    ^ See also the 1998 Al-Qaeda fatwā: "The ruling to kill the Americans and their allies – civilians and military – is an individual duty for every Muslim who can do it in any country in which it is possible to do it, in order to liberate the al-Aqsa Mosque and the holy mosque [Mecca] from their grip, and in order for their armies to move out of all the lands of Islam, defeated and unable to threaten any Muslim." Quoted from "Al Qaeda's Second Fatwa". PBS NewsHour. PBS. Archived from the original on November 28, 2013. Retrieved May 29, 2014.
    ^ Summers and Swan (2011), pp. 211, 506n.
    ^ Lawrence (2005), p. 239.
    ^ "Full transcript of bin Ladin's speech". Al Jazeera. November 4, 2004. Archived from the original on November 14, 2016. Retrieved August 24, 2016.
    ^ In his taped broadcast from January 2010, bin Laden said "Our attacks against you [the United States] will continue as long as U.S. support for Israel continues. ... The message sent to you with the attempt by the hero Nigerian Umar Farouk Abdulmutallab is a confirmation of our previous message conveyed by the heroes of September 11". Quoted from "Bin Laden: Attacks on U.S. to go on as long as it supports Israel" Archived December 16, 2016, at the Wayback Machine, in Haaretz.com
    ^ Bernard Lewis, 2004. In Bernard Lewis's 2004 book The Crisis of Islam: Holy War and Unholy Terror, he argues that animosity toward the West is best understood with the decline of the once powerful Ottoman empire, compounded by the import of western ideas – Arab socialism, Arab liberalism and Arab secularism
    ^ In "The spirit of terrorism", Jean Baudrillard described 9/11 as the first global event that "questions the very process of globalization". Baudrillard. "The spirit of terrorism". Archived from the original on May 28, 2010. Retrieved June 26, 2011.
    ^ In an essay entitled "Somebody Else's Civil War", Michael Scott Doran argues the attacks are best understood as part of a religious conflict within the Muslim world and that bin Laden's followers "consider themselves an island of true believers surrounded by a sea of iniquity". Hoping that U.S. retaliation would unite the faithful against the West, bin Laden sought to spark revolutions in Arab nations and elsewhere. Doran argues the Osama bin Laden videos attempt to provoke a visceral reaction in the Middle East and ensure that Muslim citizens would react as violently as possible to an increase in U.S. involvement in their region. (Doran, Michael Scott. "Somebody Else's Civil War". Foreign Affairs. No. January/February 2002. Archived from the original on April 23, 2015. Retrieved December 5, 2009. Reprinted in Hoge, James F.; Rose, Gideon (2005). Understanding the War on Terror. New York: Norton. pp. 72–75. ISBN 978-0-87609-347-4.)
    ^ In The Osama bin Laden I Know, Peter Bergen argues the attacks were part of a plan to cause the United States to increase its military and cultural presence in the Middle East, thereby forcing Muslims to confront the idea of a non-Muslim government and to eventually establish conservative Islamic governments in the region.(Bergen (2006), p. 229)
    ^ Lahoud, Nelly (2022). The Bin Laden Papers: How the Abbottabad Raid Revealed the Truth about al-Qaeda, Its Leader and His Family. New Haven (CT): Yale University Press. pp. 16–19, 307. ISBN 978-0-300-26063-2.
    "The Birth of the Idea of September 11" (in Arabic). Central Intelligence Agency. September 2002. Archived from the original on April 15, 2022. Retrieved April 15, 2022.
    ^ "Suspect 'reveals 9/11 planning'". BBC News. September 22, 2003. Archived from the original on December 25, 2018. Retrieved September 3, 2011.
    ^ Jump up to:a b 9/11 Commission Report (2004), Chapter 5, pp. ??[page needed]
    ^ 9/11 Commission Report (2004), p. 67.
    ^ 9/11 Commission Report (2004), p. 149.
    ^ 9/11 Commission Report (2004), p. 155.
    ^ Lichtblau, Eric (March 20, 2003). "Bin Laden Chose 9/11 Targets, Al Qaeda Leader Says". The New York Times. Archived from the original on August 30, 2019. Retrieved September 3, 2011.
    ^ Wright (2006), p. 308.
    ^ Bergen (2006), p. 283.
    ^ Wright (2006), pp. 309–15.
    ^ McDermott (2005), pp. 191–92.
    ^ Bernstein, Richard (September 10, 2002). "On Path to the U.S. Skies, Plot Leader Met bin Laden". The New York Times. Archived from the original on May 12, 2011. Retrieved September 3, 2011.
    ^ Wright (2006), pp. 304–07.
    ^ Wright (2006), p. 302.
    ^ Jessee (2006), p. 371.
    ^ Jump up to:a b c d e f "9/11 commission staff statement No. 16" (PDF). 9/11 Commission. June 16, 2004. Archived (PDF) from the original on March 20, 2020. Retrieved September 11, 2012.
    ^ "Staff Monograph on 9/11 and Terrorist Travel" (PDF). 9/11 Commission. 2004. Archived from the original on December 25, 2018. Retrieved September 3, 2011.
    ^ Irujo, Jose María (March 21, 2004). "Atta recibió en Tarragona joyas para que los miembros del 'comando' del 11-S se hiciesen pasar por ricos saudíes". El País (in Spanish). Retrieved April 10, 2012.
    ^ "Entry of the 9/11 Hijackers into the United States Staff Statement No. 1" (PDF). National Commission on Terrorist Attacks Upon The United States. p. 2. Archived (PDF) from the original on April 14, 2020. Retrieved February 7, 2017.
    ^ Hudson, John (May 3, 2013). "How jihadists schedule terrorist attacks". Foreign Policy. Archived from the original on April 4, 2020. Retrieved February 9, 2020.
    ^ Wright (2006), pp. 310–12.
    ^ Clarke (2004), pp. 235–36.
    ^ Wright (2006), p. 344.
    ^ Clarke (2004), pp. 236–37.
    ^ Clarke (2004), pp. 242–43.
    ^ Kean, Thomas; Hamilton, Lee (2004). 9/11 Commission Report (Official Government ed.). Washington D.C, US. p. 251. ISBN 0-16-072304-3.
    ^ Wright (2006), p. 340.
    ^ Wright (2006), pp. 340–43.
    ^ Wright (2006), pp. 352–53.
    ^ Wright (2006), p. 350.
    ^ Yitzhak (2016), p. 218.
    ^ "The Osama bin Laden File: National Security Archive Electronic Briefing Book No. 343". The National Security Archive. Archived from the original on July 13, 2017. Retrieved March 14, 2016.
    ^ Wright (2006), pp. 350–51.
    ^ Wright (2006), pp. 342–43.
    ^ Javorsek II et al. (2015), p. 742.
    ^ Clarke (2004), p. 238.
    ^ Jump up to:a b c The 9/11 Commission Report, pp. 4–14.
    ^ Jump up to:a b c "The Attack Looms". 9/11 Commission Report. National Commission on Terrorist Attacks Upon the United States. 2004. Archived from the original on December 5, 2012. Retrieved September 1, 2011.
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    ^ Woolley, Scott (April 23, 2007). "Video Prophet". Forbes. Archived from the original on December 16, 2008. Retrieved May 23, 2008.
    ^ Sheehy, Gail (February 15, 2004). "'Stewardess ID'd Hijackers Early, Transcripts Show' burden". New York Observer. Archived from the original on December 7, 2007. Retrieved September 30, 2010.
    ^ Jump up to:a b c "WE HAVE SOME PLANES". National Commission on Terrorist Attacks Upon the United States. Archived from the original on December 5, 2004. Retrieved December 7, 2023.
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    ^ Tally, Steve (June 12, 2007). "Purdue creates scientifically based animation of 9/11 attack". Purdue News Service. Archived from the original on December 31, 2018. Retrieved September 4, 2011. The aircraft moved through the building as if it were a hot and fast lava flow", Sozen says. "Consequently, much of the fireproofing insulation was ripped off the structure. Even if all of the columns and girders had survived the impact – an unlikely event – the structure would fail as the result of a buckling of the columns. The heat from an ordinary office fire would suffice to soften and weaken the unprotected steel. Evaluation of the effects of the fire on the core column structure, with the insulation removed by the impact, showed that collapse would follow whatever the number of columns cut at the time of the impact.
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    ^ "Saint Nicholas Greek Orthodox Church officially reopens to public after being destroyed on 9/11". CBS News. December 6, 2022. Retrieved December 7, 2022.
    ^ Pareles, Jon (September 18, 2023). "Perelman Arts Center Opens in New York and Welcomes the World". The New York Times. ISSN 0362-4331. Retrieved September 27, 2023.
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    ^ Sigmund, Pete. "Crews Assist Rescuers in Massive WTC Search". Construction Equipment Guide. Retrieved September 4, 2011.
    ^ National Day of Prayer and Remembrance for the Victims Of the Terrorist Attacks on September 11, 2001 Archived September 6, 2017, at the Wayback Machine A Proclamation by the President of the United States of America
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    ^ "About the World Trade Center Site Memorial Competition". World Trade Center Site Memorial Competition. Archived from the original on December 15, 2018. Retrieved September 4, 2011.
    ^ "WTC Memorial Construction Begins". CBS News. Associated Press. March 6, 2006. Retrieved September 4, 2011.
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    ^ Otterman, Sharon (November 29, 2017). "Battered and Scarred, 'Sphere' Returns to 9/11 Site". The New York Times. Retrieved August 23, 2021.
    ^ Miroff, Nick (September 11, 2008). "Creating a Place Like No Other". The Washington Post. Retrieved September 4, 2011.
    ^ Miroff, Nick (September 12, 2008). "A Long-Awaited Opening, Bringing Closure to Many". The Washington Post. Retrieved September 4, 2011.
    ^ Dwyer, Timothy (May 26, 2007). "Pentagon Memorial Progress Is Step Forward for Families". The Washington Post. Retrieved September 4, 2011.
    ^ "DefenseLINK News Photos – Pentagon's America's Heroes Memorial". Department of Defense. Archived from the original on November 30, 2009. Retrieved September 4, 2011.
    ^ "Flight 93 National Memorial – Sources and Detailed Information". National Park Service. n.d. Retrieved January 31, 2017. 13. When will the Memorial be finished?
    ^ Jump up to:a b "Flight 93 National Memorial – Frequently Asked Questions (FAQs)" (PDF). National Park Service. May 2013. pp. 22–23. Retrieved January 31, 2017.
    ^ "A Long Road to a Place of Peace for Flight 93 Families". The New York Times. September 9, 2015. Retrieved September 9, 2015.
    ^ "Flight 93 Memorial Project". Flight 93 Memorial Project / National Park Service. Archived from the original on April 11, 2008. Retrieved September 4, 2011.
    ^ Nephin, Dan (August 24, 2008). "Steel cross goes up near flight's 9/11 Pa. crash site". Associated Press. Archived from the original on October 21, 2011. Retrieved September 5, 2011.
    ^ Gaskell, Stephanie (August 25, 2008). "Pa. site of 9/11 crash gets WTC beam". New York Daily News. Retrieved September 4, 2011.
    ^ Fessenden, Ford (November 18, 2002). "9/11; After the World Gave: Where $2 Billion in Kindness Ended Up". The New York Times. Retrieved September 4, 2011.
    ^ Newman, Andy (September 11, 2010). "At a Memorial Ceremony, Loss and Tension". The New York Times.
    ^ "Biden will observe 9/11 in Alaska instead of the traditional NYC, Virginia or Pennsylvania events". AP News. August 28, 2023. Retrieved September 23, 2023.
    ^ Judd, Donald (September 11, 2023). "Biden marks 9/11 in Alaska, calls on Americans 'to protect our democracy' | CNN Politics". CNN. Retrieved September 23, 2023.
    ^ Hutzler, Alexandra (September 11, 2023). "Biden criticized for marking 9/11 anniversary in Alaska". ABC News. Retrieved September 23, 2023.
    Bibliography
    "Chapter 1.1: 'We Have Some Planes': Inside the Four Flights" (PDF). 9/11 Commission Report (Report). National Commission on Terrorist Attacks Upon the United States. 2004. Retrieved March 18, 2016.
    Alavosius, Mark P.; Rodriquez, Nischal J. (2005). "Unity of Purpose/Unity of effort: Private-Sector Preparedness in Times of Terror". Disaster Prevention & Management. 14 (5): 666. Bibcode:2005DisPM..14..666A. doi:10.1108/09653560510634098.
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    Averill, Jason D. (2005). Final Reports of the Federal Building and Fire Investigation of the World Trade Center Disaster (PDF) (Report). National Institute of Standards and Technology (NIST). Archived from the original (PDF) on May 9, 2009. Retrieved September 2, 2011.
    Bergen, Peter L. (2001). Holy War, Inc.: Inside the Secret World of Osama Bin Laden. Simon and Schuster. ISBN 978-0-7432-3467-2. Retrieved March 18, 2016.
    Bergen, Peter (2006). The Osama Bin Laden I Know: An Oral History of Al Qaeda's Leader. Simon and Schuster. ISBN 978-0-7432-9592-5. Retrieved March 18, 2016.
    Berner, Brad (2007). The World According to Al Qaeda. Peacock Books. ISBN 978-81-248-0114-7. Retrieved March 18, 2016.
    Bodnar, John.. Divided by Terror: American Patriotism after 9/11 (University of North Carolina Press, 2021) how memory of the event stimulated and reshaped patriotism.
    Clarke, Richard (2004). Against All Enemies: Inside America's War on Terror. New York: Free Press. ISBN 978-0-7432-6024-4.
    Dwyer, Jim; Flynn, Kevin (2005). 102 Minutes. Times Books. ISBN 978-0-8050-7682-0. Retrieved March 18, 2016.
    Final Report on the Collapse of World Trade Center Building 7 (PDF) (Report). National Institute of Standards and Technology. November 2008. Retrieved April 11, 2012.
    "Flight Path Study – American Airlines Flight 77" (PDF). National Transportation Safety Board. February 19, 2002. Retrieved September 3, 2011.
    Fouda, Yosri; Fielding, Nick (2004). Masterminds of Terror: The Truth Behind the Most Devastating Terrorist Attack the World Has Ever Seen. Arcade Publishing. ISBN 978-1-55970-717-6. Retrieved March 18, 2016.
    Goldberg, Alfred; et al. (2007). Pentagon 9/11. Washington, D.C.: Government Printing Office. ISBN 978-0-16-078328-9. Retrieved March 18, 2016.
    Graff, Garrett M. (2019). The Only Plane in the Sky: An Oral History of 9/11. New York: Avid Reader Press. ISBN 978-1-5011-8220-4.
    Gunaratna, Ronan (2002). Inside Al Qaeda: global network of terror. Columbia University Press. ISBN 978-0-231-12692-2.
    Holmes, Stephen (2006). "Al Qaeda, September 11, 2001". In Diego Gambetta (ed.). Making sense of suicide missions. Oxford University Press. ISBN 978-0-19-929797-9. Retrieved March 18, 2016.
    Ibrahim, Raymond; bin Laden, Osama (2007). The Al Qaeda reader. Random House Digital, Inc. ISBN 978-0-385-51655-6. Retrieved March 18, 2016.
    Javorsek II, Daniel; Rose, John; Marshall, Christopher; Leitner, Peter (August 5, 2015). "A Formal Risk-Effectiveness Analysis Proposal for the Compartmentalized Intelligence Security Structure". International Journal of Intelligence and CounterIntelligence. 28 (4): 734–61. doi:10.1080/08850607.2015.1051830. S2CID 152911592.
    Jessee, Devin (2006). "Tactical Means, Strategic Ends: Al Qaeda's Use of Denial and Deception" (PDF). International Journal of Intelligence and CounterIntelligence. 18 (3): 367–88. doi:10.1080/09546550600751941. S2CID 144349098. Archived from the original (PDF) on November 21, 2021. Retrieved March 23, 2016.
    Kelley, Christopher (2006). Executing the Constitution: putting the president back into the Constitution. SUNY Press. ISBN 978-0-7914-6727-5. Retrieved March 18, 2016.
    Keppel, Gilles; Milelli, Jean-Pierre; Ghazaleh, Pascale (2008). Al Qaeda in its own words. Harvard University Press. ISBN 978-0-674-02804-3. Retrieved March 18, 2016.
    Lawrence, Bruce (2005). Messages to the world: the statements of Osama Bin Laden. Verso. ISBN 978-1-84467-045-1. Retrieved May 29, 2014.
    Martin, Gus (2011). The SAGE Encyclopedia of Terrorism, Second Edition. Sage. ISBN 978-1-4129-8017-3. Retrieved March 18, 2016.
    McDermott, Terry (2005). Perfect Soldiers: The 9/11 Hijackers. HarperCollins. pp. 191–92. ISBN 978-0-06-058470-2.
    "McKinsey Report". FDNY / McKinsey & Company. August 9, 2002. Archived from the original on June 3, 2010. Retrieved September 25, 2011.
    Mearsheimer, John J. (2007). The Israel Lobby and U.S. Foreign Policy. Macmillan. ISBN 978-0-374-17772-0.
    Murdico, Suzanne (2003). Osama Bin Laden. Rosen Publishing Group. ISBN 978-0-8239-4467-5.
    "The Pentagon Building Performance Report" (PDF). American Society of Civil Engineers (ASCE). January 2003. Archived from the original (PDF) on July 21, 2011. Retrieved September 3, 2011.
    Summers, Anthony; Swan, Robbyn (2011). The Eleventh Day: The Full Story of 9/11 and Osama Bin Laden. New York: Ballantine Books. ISBN 978-1-4000-6659-9. Retrieved March 18, 2016.
    Sunder, Shyam S. (2005). Final Report on the Collapse of the World Trade Center Towers. National Institute of Standards and Technology (NIST). Retrieved September 2, 2011.
    "World Trade Center Building Performance Study – Bankers Trust Building" (PDF). Federal Emergency Management Agency. May 2002. Retrieved July 12, 2007.
    "World Trade Center Building Performance Study – Peripheral Buildings" (PDF). Federal Emergency Management Agency. May 2002. Retrieved September 3, 2011.
    "World Trade Center Building Performance Study" (PDF). Federal Emergency Management Agency. 2002. Retrieved September 2, 2011.
    Wright, Lawrence (2006). The Looming Tower: Al-Qaeda and the Road to 9/11. New York: Alfred A. Knopf. ISBN 978-0-375-41486-2. OCLC 64592193.
    Yitzhak, Ronen (Summer 2016). "The War Against Terrorism and For Stability of the Hashemite Regime: Jordanian Intelligence Challenges in the 21st Century". International Journal of Intelligence and CounterIntelligence. 29 (2): 213–35. doi:10.1080/08850607.2016.1121038. S2CID 155138286.
    Further reading
    The 9/11 Commission Report: Final Report of the National Commission on Terrorist Attacks Upon the United States. National Commission on Terrorist Attacks. July 30, 2010. ISBN 978-1-61640-219-8.
    Atkins, Stephen E (2011). The 9/11 Encyclopedia. ABC-CLIO. ISBN 978-1-59884-921-9.
    Bolton, M. Kent (2006). U.S. National Security and Foreign Policymaking After 9/11: Present at the Re-creation. Rowman & Littlefield. ISBN 978-0-7425-5900-4.
    Caraley, Demetrios (2002). September 11, terrorist attacks, and U.S. foreign policy. Academy of Political Science. ISBN 978-1-884853-01-2.
    Chernick, Howard (2005). Resilient city: the economic impact of 9/11. Russell Sage Foundation. ISBN 978-0-87154-170-3.
    Damico, Amy M; Quay, Sara E. (2010). September 11 in Popular Culture: A Guide. Greenwood. ISBN 978-0-313-35505-9.
    Hampton, Wilborn (2003). September 11, 2001: attack on New York City. Candlewick Press. ISBN 978-0-7636-1949-7.
    Langley, Andrew (2006). September 11: Attack on America. Compass Point Books. ISBN 978-0-7565-1620-8.
    Neria, Yuval; Gross, Raz; Marshall, Randall D.; Susser, Ezra S. (2006). 9/11: mental health in the wake of terrorist attacks. Cambridge University Press. ISBN 978-0-521-83191-8.
    Ryan, Allan A. (2015). The 9/11 Terror Cases: Constitutional Challenges in the War against Al Qaeda. University Press of Kansas. ISBN 978-0-7006-2132-3.
    Strasser, Steven; Whitney, Craig R; United States. Congress. Senate. Select Committee on Intelligence, National Commission on Terrorist Attacks upon the United States (2004). The 9/11 investigations: staff reports of the 9/11 Commission: excerpts from the House-Senate joint inquiry report on 9/11: testimony from fourteen key witnesses, including Richard Clarke, George Tenet, and Condoleezza Rice. PublicAffairs. ISBN 978-1-58648-279-4.
    External links
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    National Commission on Terrorist Attacks Upon the United States official commission website
    List of victims
    September 11, 2001, Documentary Project from the U.S. Library of Congress, Memory.loc.gov
    September 11, 2001, Web Archive from the U.S. Library of Congress, Minerva
    National Security Archive
    September 11 Digital Archive: Saving the Histories of September 11, 2001, from the Center for History and New Media and the American Social History Project/Center for Media and Learning
    DoD: Khalid Sheikh Mohammed Verbatim Transcript of Combatant Status Review Tribunal Hearing for ISN 10024, from Wikisource
    The 9/11 Legacies Project, Oriental Institute, Czech Academy of Sciences, Prague
    9/11 at 20: A Week of Reflection, Responsible Statecraft, The Quincy Institute
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    From Wikipedia, the free encyclopedia

    For other events on the same date, see September 11 attacks (disambiguation).
    "9/11" redirects here. For the calendar dates, see September 11 and November 9. For the reverse, see 11/9 (disambiguation).
    September 11 attacks
    Part of terrorism in the United States
     
    United Airlines Flight 175 hits the South Tower
     
    Flight 77 hits The Pentagon
     
    Fuselage of Flight 93 in Stonycreek Township
     
    View of the collapsing North Tower
     
    Collapse of the 7 WTC
     
    World Trade Center site after the attacks
     
    The Pentagon building on fire
    Location
    Lower Manhattan, New York
    Arlington County, Virginia
    Stonycreek Township, Pennsylvania
    [a]
    Date
    September 11, 2001; 22 years ago
    c. 08:13 a.m.[b] – 10:03 a.m.[c] (EDT)
    Target
    North Tower
    (AA 11)
    South Tower
    (UA 175)
    The Pentagon
    (AA 77)
    U.S. Capitol Building or the White House
    (UA 93; unsuccessful due to passenger revolt)
    Attack type
    Islamic terrorism, aircraft hijacking, suicide attack, mass murder
    Deaths
    2,996
    (2,977 victims + 19 Al-Qaeda terrorists)
    Injured
    6,000–25,000+[d]
    Perpetrators
    Al-Qaeda led by Osama bin Laden (see also: responsibility)
    No. of participants
    19
    Motive
    Several; see Motives for the September 11 attacks and Fatawā of Osama bin Laden
    Convicted
    Zacarias Moussaoui
    Imad Yarkas
    Mounir el-Motassadeq (see also: Trials related to the September 11 attacks)
    September 11 attacks
     
    showTimeline
    showVictims
    showHijacked airliners
    showCrash sites
    showAftermath
    showResponse
    showPerpetrators
    showInquiries
    showCultural effects
    showMiscellaneous
    v
    t
    e
     
    showv
    t
    e
    al-Qaeda attacks
    The September 11 attacks, commonly known as 9/11,[e] were four coordinated Islamist suicide terrorist attacks carried out by Al-Qaeda against the United States on September 11, 2001. That morning, 19 terrorists hijacked four commercial airliners scheduled to travel from the East Coast to California. The hijackers crashed the first two planes into the Twin Towers of the World Trade Center in New York City, two of the world's five tallest buildings at the time, and aimed the next two flights toward targets in or near Washington, D.C., in an attack on the nation's capital. The third team succeeded in striking the Pentagon, the headquarters of the U.S. Department of Defense in Arlington County, Virginia, while the fourth plane crashed in rural Pennsylvania during a passenger revolt. The September 11 attacks killed 2,977 people, making them the deadliest terrorist attack in history, and instigated the multi-decade global war on terror, fought in Afghanistan, Iraq, and elsewhere.

    The first impact was that of American Airlines Flight 11, which ringleader Mohamed Atta flew into the North Tower of the World Trade Center complex in Lower Manhattan at 8:46 a.m.[f] Seventeen minutes later, at 9:03,[g] the World Trade Center's South Tower was hit by United Airlines Flight 175. Both 110-story skyscrapers collapsed within an hour and forty-one minutes,[h] bringing about the destruction of the remaining five structures in the WTC complex and damaging or destroying nearby buildings. A third flight, American Airlines Flight 77, crashed into the Pentagon at 9:37 a.m., causing a partial collapse. The fourth and final flight, United Airlines Flight 93, flew in the direction of the capital. Alerted to the previous attacks, the passengers fought for control, forcing the hijackers to nosedive the plane into a Stonycreek Township field, near Shanksville, at 10:03 a.m. Investigators determined that Flight 93's target was either the United States Capitol or the White House.

    That evening, the Central Intelligence Agency informed President George W. Bush that its Counterterrorism Center had identified the attacks as having been the work of Al-Qaeda under Osama bin Laden's leadership. The United States formally responded by launching the war on terror and invading Afghanistan to depose the Taliban, which rejected the conditions of U.S. terms to expel Al-Qaeda from Afghanistan and extradite its leaders. The U.S.'s invocation of Article 5 of the North Atlantic Treaty—its only usage to date—called upon allies to fight Al-Qaeda. As U.S. and NATO invasion forces swept through Afghanistan, bin Laden eluded them by disappearing into the White Mountains. He denied any involvement until 2004, when excerpts of a taped statement in which he accepted responsibility for the attacks were released. Al-Qaeda's cited motivations included U.S. support of Israel, the presence of U.S. military bases in Saudi Arabia and sanctions against Iraq. The nearly decade-long manhunt for bin Laden concluded on May 2, 2011, when he was killed during a U.S. military raid after being tracked down to his compound in Abbottabad, Pakistan. The war in Afghanistan continued for another eight years until the agreement was made in February 2020 for American and NATO troops to withdraw from the country, and the last members of the U.S. armed forces left the region on August 30, 2021, after which the Taliban returned to power. Ayman al-Zawahiri, another planner of the attacks who succeeded bin Laden as leader of Al-Qaeda, was killed by U.S. drone strikes in Kabul, Afghanistan on July 31, 2022.[14]

    Excluding the hijackers, the attacks killed 2,977 people, injured thousands more and gave rise to substantial long-term health consequences while also causing at least $10 billion in infrastructure and property damage. It remains the deadliest terrorist attack in history as well as the deadliest incident for firefighters and law enforcement personnel in US history, killing 343 and 72 members, respectively. The loss of life stemming from the impact of Flight 11 secured its place as the most lethal plane crash in aviation history followed by the death toll incurred by Flight 175. The destruction of the World Trade Center and its environs seriously harmed the U.S. economy and induced global market shocks. Many other countries strengthened anti-terrorism legislation and expanded their powers of law enforcement and intelligence agencies. Cleanup of the World Trade Center site (colloquially "Ground Zero") took eight months and was completed in May 2002, while the Pentagon was repaired within a year. After delays in the design of a replacement complex, construction of the One World Trade Center began in November 2006; it opened in November 2014. Memorials to the attacks include the National September 11 Memorial & Museum in New York City, The Pentagon Memorial in Arlington County, Virginia, and the Flight 93 National Memorial at the Pennsylvania crash site.

    Background
    Further information: Fatawā of Osama bin Laden and Political views of Osama bin Laden
    Al-Qaeda
    Main article: Al-Qaeda
    Further information: Jihad
    Al-Qaeda's origins can be traced to 1979, when the Soviet Union invaded Afghanistan.[15] Soon after the invasion, Osama bin Laden traveled to Afghanistan and helped organize Arab mujahideen (the "Afghan Arabs") to resist the "Communist invaders" (Soviets) until their exit from the country in 1989.[16][17] In 1984, bin Laden, along with Islamic scholar Abdullah Azzam, formed the Maktab al-Khidamat (MAK), an organization to support Arab mujahideen who came to join the jihad in Afghanistan.[15][18]

    The U.S. Central Intelligence Agency (CIA) funnelled several billion dollars worth of weapons to the indigenous Afghan mujahideen resistance, a portion of which bled to the Arab volunteers.[19] However, no direct evidence of U.S. aid to bin Laden or any of his affiliates was ever uncovered.[20]

    In 1996, bin Laden issued his first fatwā, which declared war against the United States and demanded the expulsion of all American soldiers from the Arabian Peninsula.[21] In a second 1998 fatwā, bin Laden outlined his objections to American foreign policy with respect to the State of Israel, as well as the continued presence of American troops in Saudi Arabia after the Gulf War.[22] Bin Laden maintained that Muslims are obliged to attack American targets until the aggressive policies of the U.S. against Muslims were reversed. According to bin Laden, Islamic jurists had "throughout Islamic history unanimously agreed that the jihad is an individual duty if the enemy destroys the Muslim countries".[22][23]

    The Hamburg cell in Germany included Islamists who eventually came to be key operatives in the 9/11 attacks.[24] Mohamed Atta; Marwan al-Shehhi; Ziad Jarrah; Ramzi bin al-Shibh; and Said Bahaji were all members of Al-Qaeda's Hamburg cell.[25] Bin Laden asserted that all Muslims must wage a defensive war against the United States, and combat American aggression. He further argued that military strikes against American assets would send a message to the American people, attempting to force the U.S. to re-evaluate its support to Israel, and other aggressive policies.[26] In a 1998 interview with American journalist John Miller, bin Laden stated:

    [W]e tell the Americans as people and we tell the mothers of soldiers and American mothers in general that if they value their lives and the lives of their children, to find a nationalistic government that will look after their interests and not the interests of the Jews. The continuation of tyranny will bring the fight to America, as [the 1993 World Trade Center bomber] Ramzi [Yousef] yourself and others did. This is my message to the American people: to look for a serious government that looks out for their interests and does not attack others, their lands, or their honour. My word to American journalists is not to ask why we did that but to ask what their government has done that forced us to defend ourselves.

    — Osama bin Laden, in his interview with John Miller, May 1998, [27]
    Osama bin Laden
    Main article: Osama bin Laden
    Further information: Militant career of Osama bin Laden
     Osama bin Laden in 1997–1998
    Bin Laden orchestrated the September 11 attacks. He initially denied involvement, but later recanted his denial.[28][29][30] Al Jazeera broadcast a statement by him on September 16, 2001: "I stress that I have not carried out this act, which appears to have been carried out by individuals with their own motivation".[31] In November 2001, U.S. forces recovered a videotape from a destroyed house in Jalalabad, Afghanistan. In the video, bin Laden, talking to Khaled al-Harbi, admitted foreknowledge of the attacks.[32] On December 27, 2001, a second video of bin Laden was released in which he, stopping short of admitting responsibility for the attacks, said:[33]

    It has become clear that the West in general and America in particular have an unspeakable hatred for Islam. ... It is the hatred of crusaders. Terrorism against America deserves to be praised because it was a response to injustice, aimed at forcing America to stop its support for Israel, which kills our people. ... We say that the end of the United States is imminent, whether Bin Laden or his followers are alive or dead, for the awakening of the Muslim ummah [nation] has occurred. ... It is important to hit the economy (of the United States), which is the base of its military power...If the economy is hit they will become reoccupied.

    — Osama bin Laden
    Shortly before the 2004 U.S. presidential election, bin Laden used a taped statement to publicly acknowledge Al-Qaeda's involvement in the attacks.[28] He admitted his direct link to the attacks and said they were carried out because:

    The events that affected my soul in a direct way started in 1982 when America permitted the Israelis to invade Lebanon and the American Sixth Fleet helped them in that. This bombardment began and many were killed and injured and others were terrorised and displaced.

    I couldn't forget those moving scenes, blood and severed limbs, women and children sprawled everywhere. Houses were destroyed along with their occupants high rises demolished over their residents, rockets raining down on our home without mercy...As I looked at those demolished towers in Lebanon, it entered my mind that we should punish the oppressor in kind and that we should destroy towers in America so that they taste some of what we tasted and so that they be deterred from killing our women and children.

    And that day, it was confirmed to me that oppression and the intentional killing of innocent women and children is a deliberate American policy. Destruction is freedom and democracy, while resistance is terrorism and intolerance.[34]
    Bin Laden personally directed his followers to attack the World Trade Center and the Pentagon.[35][36] Another video obtained by Al Jazeera in September 2006 showed bin Laden with one of the attacks' chief planners, Ramzi bin al-Shibh, as well as hijackers, Hamza al-Ghamdi and Wail al-Shehri, amidst making preparations for the attacks.[37] Bin Laden had been on the FBI's Most Wanted List since 1998 for the 1998 bombings of the U.S. embassies in Tanzania and Kenya.[38][39]

    Khalid Sheikh Mohammed and other Al-Qaeda members
    Main article: Khalid Sheikh Mohammed
     Khalid Sheikh Mohammed after his 2003 capture in Rawalpindi, Pakistan
    Journalist Yosri Fouda of the Arabic television channel Al Jazeera reported that in April 2002 Al-Qaeda member Khalid Sheikh Mohammed admitted his involvement in the attacks, along with Ramzi bin al-Shibh.[40][41][42] The 2004 9/11 Commission Report determined that Mohammed's animosity towards the United States, the principal architect of the 9/11 attacks, stemmed from his "violent disagreement with U.S. foreign policy favoring Israel".[43] Mohammed was also an adviser and financier of the 1993 World Trade Center bombing and the uncle of Ramzi Yousef, the lead bomber in that attack.[44][45] In late 1994, Mohammed and Yousef moved on to plan a new terrorist attack called the Bojinka plot planned for January 1995. Despite a failure and Yousef's capture by U.S. forces the following month, the Bojinka plot would influence the later 9/11 attacks.[46]

    In "Substitution for Testimony of Khalid Sheikh Mohammed" from the trial of Zacarias Moussaoui, five people are identified as having been completely aware of the operation's details. They are bin Laden; Khalid Sheikh Mohammed; Ramzi bin al-Shibh; Abu Turab al-Urduni; and Mohammed Atef.[47]

    Motives
    Main article: Motives for the September 11 attacks
    Further information: Fatwa of Osama bin Laden
    Osama bin Laden's declaration of a holy war against the United States, and a 1998 fatwā signed by bin Laden and others that called for the killing of Americans,[22][48] are seen by investigators as evidence of his motivation.[49] During his interview with Hamid Mir in November 2001, Bin Laden defended the September 11 attacks as retaliatory strikes against American atrocities against Muslims across the world. He also maintained that the attacks were not directed against women and children, asserting that the targets of the strikes were symbols of America's "economic and military power".[50][51]

    In bin Laden's November 2002 "Letter to the American people", he explicitly stated that al-Qaeda's motives for the attacks included:

    U.S. support of Israel[52][53]
    Bin Laden's strategy to support and globally expand the Al-Aqsa Intifada[54][55][56][57]
    Attacks against Muslims by U.S.-led coalition in Somalia
    U.S. support of the government of Philippines against Muslims in the Moro conflict
    U.S. support for the Israeli occupation of Southern Lebanon
    U.S. support of Russian atrocities against Muslims in Chechnya
    Pro-American governments in the Middle East (who "act as your agents") being against Muslim interests
    U.S. support of Indian oppression against Muslims in Kashmir
    The presence of U.S. troops in Saudi Arabia[58]
    The sanctions against Iraq[52]
    Environmental destruction[59][60][61]
    After the attacks, bin Laden and Ayman al-Zawahiri released additional videotapes and audio recordings, some of which repeated the above reasons for the attacks. Two relevant publications were bin Laden's 2002 "Letter to the American people"[62] and a 2004 videotape by bin Laden.[63]

    [...] those young men, for whom God has cleared the way, didn't set out to kill children, but rather attacked the biggest centre of military power in the world, the Pentagon, which contains more than 64,000 workers, a military base which has a big concentration of army and intelligence ... As for the World Trade Center, the ones who were attacked and who died in it were part of a financial power. It wasn't a children's school! Neither was it a residence. The consensus is that most of the people who were in the towers were men who backed the biggest financial force in the world, which spreads mischief throughout the world.
    — Osama Bin Laden's interview with Tayseer Allouni, 21 October 2001[64]
    As an adherent of Islam, bin Laden believed that non-Muslims are forbidden from having a permanent presence in the Arabian Peninsula.[65] In 1996, bin Laden issued a fatwā calling for American troops to leave Saudi Arabia. In 1998, Al-Qaeda wrote "For over seven years the United States has been occupying the lands of Islam in the holiest of places, the Arabian Peninsula, plundering its riches, dictating to its rulers, humiliating its people, terrorizing its neighbours, and turning its bases in the Peninsula into a spearhead through which to fight the neighbouring Muslim peoples".[66]

    In a December 1999 interview, bin Laden said he felt that Americans were "too near to Mecca", and considered this a provocation to the entire Muslim world.[67] One analysis of suicide terrorism suggested that without U.S. troops in Saudi Arabia, Al-Qaeda likely would not have been able to get people to commit to suicide missions.[68]

    In the 1998 fatwā, Al-Qaeda identified the Iraq sanctions as a reason to kill Americans, condemning the "protracted blockade" among other actions that constitute a declaration of war against "Allah, his messenger, and Muslims".[66] The fatwā declared that "the ruling to kill the Americans and their allies – civilians and military – is an individual duty for every Muslim who can do it in any country in which it is possible to do it, in order to liberate the al-Aqsa Mosque and the holy mosque of Mecca from their grip, and in order for their [the Americans'] armies to move out of all the lands of Islam, defeated and unable to threaten any Muslim".[22][69]

    In 2004, bin Laden claimed that the idea of destroying the towers had first occurred to him in 1982 when he witnessed Israel's bombardment of high-rise apartment buildings during the 1982 Lebanon War.[70][71] Some analysts, including political scientists John Mearsheimer and Stephen Walt, also claimed that U.S. support of Israel was a motive for the attacks.[53][67] In 2004 and 2010, bin Laden again connected the September 11 attacks with U.S. support of Israel, although most of the letters expressed bin Laden's disdain for President Bush and bin Laden's hope to "destroy and bankrupt" the U.S.[72][73]

    Other motives have been suggested in addition to those stated by bin Laden and Al-Qaeda. Some authors suggested the "humiliation" that resulted from the Islamic world falling behind the Western world – this discrepancy was rendered especially visible by globalization[74][75] and a desire to provoke the U.S. into a broader war against the Islamic world in the hope of motivating more allies to support Al-Qaeda. Similarly, others have argued the 9/11 attacks were a strategic move to provoke America into a war that would incite a pan-Islamic revolution.[76][77]

    Documents seized during the 2011 operation that killed bin Laden included a few notes handwritten by bin Laden in September 2002 with the heading "The Birth of the Idea of September 11". In these notes, he describes how he was inspired by the crash of EgyptAir Flight 990 on October 31, 1999, which was deliberately crashed by co-pilot Gameel Al-Batouti. "This is how the idea of 9/11 was conceived and developed in my head, and that is when we began the planning" bin Laden continued, adding that no one but Abu Hafs and Abu al-Khair knew about it at the time. The 9/11 Commission Report identified Khalid Sheikh Mohammed as the architect of 9/11, but he is not mentioned in bin Laden's notes.[78]

    Planning
    Main article: Planning of the September 11 attacks
     Map of the attacks on the World Trade Center
     Diagram of the World Trade Center attacks
    The attacks were conceived by Khalid Sheikh Mohammed, who first presented it to Osama bin Laden in 1996.[79] At that time, bin Laden and Al-Qaeda were in a period of transition, having just relocated back to Afghanistan from Sudan.[80] The 1998 African embassy bombings and bin Laden's February 1998 fatwā marked a turning point of Al-Qaeda's terrorist operation,[81] as bin Laden became intent on attacking the United States.

    In late 1998 or early 1999, bin Laden approved Mohammed to go forward with organizing the plot.[82] Mohammed, bin Laden, and Mohammed Atef, bin Laden's deputy, held a series of meetings in early 1999.[83] Atef provided operational support, including target selections and helping arrange travel for the hijackers.[80] Bin Laden overruled Mohammed, rejecting potential targets such as the U.S. Bank Tower in Los Angeles for lack of time.[84][85]

    Bin Laden provided leadership and financial support and was involved in selecting participants.[86] He initially selected Nawaf al-Hazmi and Khalid al-Mihdhar, both experienced jihadists who had fought in Bosnia. Hazmi and Mihdhar arrived in the United States in mid-January 2000. In early 2000, Hazmi and Mihdhar took flying lessons in San Diego, California. Both spoke little English, performed poorly in flying lessons, and eventually served as secondary "muscle" hijackers.[87][88]

    In late 1999, a group of men from Hamburg, Germany, arrived in Afghanistan. The group included Mohamed Atta, Marwan al-Shehhi, Ziad Jarrah, and Ramzi bin al-Shibh.[89] Bin Laden selected these men because they were educated, could speak English, and had experience living in the West.[90] New recruits were routinely screened for special skills and Al-Qaeda leaders consequently discovered that Hani Hanjour already had a commercial pilot's license.[91] Mohammed later said that he helped the hijackers blend in by teaching them how to order food in restaurants and dress in Western clothing.[92]

    Hanjour arrived in San Diego on December 8, 2000, joining Hazmi.[93]: 6–7  They soon left for Arizona, where Hanjour took refresher training.[93]: 7  Marwan al-Shehhi arrived at the end of May 2000, while Atta arrived on June 3, 2000, and Jarrah arrived on June 27, 2000.[93]: 6  Bin al-Shibh applied several times for a visa to the United States, but as a Yemeni, he was rejected out of concerns he would overstay his visa.[93]: 4, 14  Bin al-Shibh stayed in Hamburg, providing coordination between Atta and Mohammed.[93]: 16  The three Hamburg cell members all took pilot training in South Florida at Huffman Aviation.[93]: 6 

    In the spring of 2001, the secondary hijackers began arriving in the United States.[94] In July 2001, Atta met with bin al-Shibh in Tarragona, Catalonia, Spain, where they coordinated details of the plot, including final target selection. Bin al-Shibh also passed along bin Laden's wish for the attacks to be carried out as soon as possible.[95] Some of the hijackers received passports from corrupt Saudi officials who were family members or used fraudulent passports to gain entry.[96]

    There have been a few theories that 9/11 was selected by the hijackers as the date of the attack because it resembled 9-1-1, the phone number used to report emergencies in the United States. However, Lawrence Wright wrote that the hijackers chose the date when John III Sobieski, the King of Poland and Grand Duke of Lithuania, began the battle that turned back the Ottoman Empire's Muslim armies that were attempting to capture Vienna (present-day capital of Austria) on 11 September 1683. During 1683, Vienna was the seat of the Holy Roman Empire and Habsburg monarchy, both major powers in Europe at the time. For Osama bin Laden, this was a date when the West gained some dominance over Islam, and by attacking on this date, he hoped to make a step in Islam "winning" the war for worldwide power and influence.[97]

    Prior intelligence
    Main article: September 11 intelligence before the attacks
    In late 1999, Al-Qaeda associate Walid bin Attash ("Khallad") contacted Mihdhar and told him to meet in Kuala Lumpur, Malaysia; Hazmi and Abu Bara al Yemeni would also be in attendance. The NSA intercepted a telephone call mentioning the meeting, Mihdhar, and the name "Nawaf" (Hazmi); while the agency feared "Something nefarious might be afoot", it took no further action.

    The CIA had already been alerted by Saudi intelligence about the status of Mihdhar and Hazmi as Al-Qaeda members and a CIA team broke into Mihdhar's Dubai hotel room and discovered that Mihdhar had a U.S. visa. While Alec Station alerted intelligence agencies worldwide about this fact, it did not share this information with the FBI. The Malaysian Special Branch observed the January 5, 2000, meeting of the two Al-Qaeda members and informed the CIA that Mihdhar, Hazmi, and Khallad were flying to Bangkok, but the CIA never notified other agencies of this, nor did it ask the State Department to put Mihdhar on its watchlist. An FBI liaison to Alec Station asked permission to inform the FBI of the meeting but was told: "This is not a matter for the FBI".[98]

    By late June, senior counter-terrorism official Richard Clarke and CIA director George Tenet were "convinced that a major series of attacks was about to come", although the CIA believed the attacks would likely occur in Saudi Arabia or Israel.[99] In early July, Clarke put domestic agencies on "full alert", telling them, "Something spectacular is going to happen here, and it's going to happen soon". He asked the FBI and the State Department to alert the embassies and police departments, and the Defense Department to go to "Threat Condition Delta".[100][101] Clarke later wrote: "Somewhere in CIA there was information that two known al Qaeda terrorists had come into the United States. Somewhere in the FBI, there was information that strange things had been going on at flight schools in the United States ... They had specific information about individual terrorists from which one could have deduced what was about to happen. None of that information got to me or the White House".[102]

    [...] by July [2001], with word spreading of a coming attack, a schism emerged among the senior leadership of al Qaeda. Several senior members reportedly agreed with Mullah Omar. Those who reportedly sided with bin Ladin included Atef, Sulayman Abu Ghayth, and KSM. But those said to have opposed him were weighty figures in the organization-including Abu Hafs the Mauritanian, Sheikh Saeed al Masri, and Sayf al Adl. One senior al Qaeda operative claims to recall Bin Ladin arguing that attacks against the United States needed to be carried out immediately to support insurgency in the Israeli-occupied territories and protest the presence of U.S. forces in Saudi Arabia.
    — 9/11 Commission Report, pp. 251[103]
    On July 13, Tom Wilshire, a CIA agent assigned to the FBI's international terrorism division, emailed his superiors at the CIA's Counterterrorism Center (CTC) requesting permission to inform the FBI that Hazmi was in the country and that Mihdhar had a U.S. visa. The CIA never responded.[104]

    The same day in July, Margarette Gillespie, an FBI analyst working in the CTC, was told to review material about the Malaysia meeting. She was not told of the participant's presence in the U.S. The CIA gave Gillespie surveillance photos of Mihdhar and Hazmi from the meeting to show to FBI counterterrorism but did not tell her their significance. The Intelink database informed her not to share intelligence material at the meeting with criminal investigators. When shown the photos, the FBI refused more details on their significance, and they were not given Mihdhar's date of birth or passport number.[105] In late August 2001, Gillespie told the INS, the State Department, the Customs Service, and the FBI to put Hazmi and Mihdhar on their watchlists, but the FBI was prohibited from using criminal agents in searching for the duo, hindering their efforts.[106]

    Also in July, a Phoenix-based FBI agent sent a message to FBI headquarters, Alec Station, and FBI agents in New York alerting them to "the possibility of a coordinated effort by Osama bin Laden to send students to the United States to attend civil aviation universities and colleges". The agent, Kenneth Williams, suggested the need to interview all flight school managers and identify all Arab students seeking flight training.[107] In July, Jordan alerted the U.S. that Al-Qaeda was planning an attack on the U.S.; "months later", Jordan notified the U.S. that the attack's codename was "The Big Wedding" and that it involved aeroplanes.[108]

    On August 6, 2001, the CIA's Presidential Daily Brief ("PDB"), designated "For the President Only", was entitled Bin Ladin Determined to Strike in US. The memo noted that FBI information "indicates patterns of suspicious activity in this country consistent with preparations for hijackings or other types of attacks".[109]

    In mid-August, one Minnesota flight school alerted the FBI about Zacarias Moussaoui, who had asked "suspicious questions". The FBI found that Moussaoui was a radical who had travelled to Pakistan, and the INS arrested him for overstaying his French visa. Their request to search his laptop was denied by FBI headquarters due to the lack of probable cause.[110]

    The failures in intelligence-sharing were attributed to 1995 Justice Department policies limiting intelligence-sharing, combined with CIA and NSA reluctance to reveal "sensitive sources and methods" such as tapped phones.[111] Testifying before the 9/11 Commission in April 2004, then – Attorney General John Ashcroft recalled that the "single greatest structural cause for the September 11th problem was the wall that segregated or separated criminal investigators and intelligence agents".[112] Clarke also wrote: "[T]here were... failures to get information to the right place at the right time".[113]

    Attacks
    For a chronological guide, see Timeline for the day of the September 11 attacks.
    Early on the morning of Tuesday, September 11, 2001, nineteen hijackers took control of four commercial airliners (two Boeing 757s and two Boeing 767s) en route to California after takeoffs from Logan International Airport in Boston, Massachusetts; Newark Liberty International Airport in Newark, New Jersey; and Washington Dulles International Airport in Loudoun and Fairfax counties in Virginia.[114] Large planes with long coast-to-coast flights were selected for hijacking because they would have more fuel.[115]

    Key info about the four flights
    Operator
    Flight number
    Aircraft type
    Time of departure*
    Time of crash*
    Departed from
    En route to
    Crash site
    Fatalities
    (There were no survivors from the flights)
    Crew
    Passengers†
    Ground§
    Hijackers
    Total‡
    American Airlines
    11
    Boeing 767-223ER
    7:59 a.m.
    8:46 a.m.
    Logan International Airport
    Los Angeles International Airport
    North Tower of the World Trade Center, floors 93 to 99
    11
    76
    2,606
    5
    2,763
    United Airlines
    175
    Boeing 767–222
    8:14 a.m.
    9:03 a.m.[g]
    Logan International Airport
    Los Angeles International Airport
    South Tower of the World Trade Center, floors 77 to 85
    9
    51
    5
    American Airlines
    77
    Boeing 757–223
    8:20 a.m.
    9:37 a.m.
    Washington Dulles International Airport
    Los Angeles International Airport
    West wall of Pentagon
    6
    53
    125
    5
    189
    United Airlines
    93
    Boeing 757–222
    8:42 a.m.
    10:03 a.m.
    Newark Int'l Airport
    San Francisco International Airport
    Field in Stonycreek Township near Shanksville
    7
    33
    0
    4
    44
    Totals
    33
    213
    2,731
    19
    2,996
    * Eastern Daylight Time (UTC−04:00)
    † Excluding hijackers
    § Including emergency workers
    ‡ Including hijackers

    The four crashes
    See also: Media documentation of the September 11 attacks
    Duration: 52 seconds.0:52
    United Airlines Flight 175 crashes into 2 World Trade Center
    At 7:59 a.m., American Airlines Flight 11 took off from Logan International Airport in Boston.[116] Fifteen minutes into the flight, five hijackers armed with boxcutters took over the plane, injuring at least three people (and possibly killing one)[117][118][119] before forcing their way into the cockpit. The terrorists also displayed an apparent explosive and sprayed mace into the cabin, to frighten the hostages into submission and further hinder resistance.[120] Back at Logan, United Airlines Flight 175 took off at 8:14 a.m., approximately the same time as Flight 11's hijacking.[121] Hundreds of miles southwest at Dulles International Airport, American Airlines Flight 77 left the runway at 8:20 a.m.[121] Flight 175's journey proceeded normally for 28 minutes until 8:42 a.m., when a group of five hijacked the plane, murdering both pilots and stabbing several crew members before assuming control of the aircraft. These hijackers also used bomb threats to instil fear into the passengers and crew,[122] also spraying chemical weapons to disable any opposition.[123] Concurrently, United Airlines Flight 93 departed from Newark International Airport in New Jersey;[121] originally scheduled to pull away from the gate at 8:00 a.m., the plane was running 42 minutes late.

    At 8:46 a.m., Flight 11 was deliberately crashed into the north face of the World Trade Center's North Tower (1 WTC),[124] although the initial presumption by many was that this was merely an accident.[125] At 8:51 a.m., American Airlines Flight 77 was also taken over by another group of five who forcibly entered the cockpit 31 minutes after takeoff.[126] Although the hijackers on this flight were equipped with knives,[127] there were no reports of anyone on board being stabbed, nor did the two people who made phone calls mention the use of mace or a bomb threat.

    Seventeen minutes after the first plane crashed into the North Tower, Flight 175 was flown into the South Tower's southern facade (2 WTC)[128] at 9:03 a.m.,[g] demonstrating that the first crash was not an accident, but rather a terrorist attack.[129][130]

    Four men aboard Flight 93 struck suddenly, killing at least one passenger, after having waited 46 minutes to make their move—a holdup that proved disastrous for the terrorists when combined with the delayed takeoff from the runway;[131] they stormed the cockpit and seized control of the plane at 9:28 a.m., turning the plane eastbound and setting course for Washington, D.C.[132] Much like their counterparts on the first two flights, the fourth team also used bomb threats and filled the cabin with mace.[133]

    Nine minutes after Flight 93's hijacking, Flight 77 crashed into the west side of the Pentagon.[134] Because of the two delays,[135] the passengers and crew of Flight 93 had time to be made aware of the previous attacks through phone calls to the ground, and as a result an uprising was hastily organized to take control of the aircraft at 9:57 a.m.[136] Within minutes, passengers had fought their way to the front of the cabin and began breaking down the cockpit door. Fearing their captives would gain the upper hand, the hijackers rolled the plane and pitched it into a nosedive,[137][138] crashing into a field near Shanksville, Pennsylvania, southeast of Pittsburgh, at 10:03 a.m. The plane was about twenty minutes away from reaching D.C. at the time of the crash, and its target is believed to have been either the Capitol Building or the White House.[115][136]

    Some passengers and crew members who called from the aircraft using the cabin air phone service and mobile phones provided details: several hijackers were aboard each plane; they used mace, tear gas, or pepper spray to overcome attendants; and some people aboard had been stabbed.[139] Reports indicated hijackers stabbed and killed pilots, flight attendants, and one or more passengers.[114][140] According to the 9/11 Commission's final report, the hijackers had recently purchased multi-function hand tools and assorted Leatherman-type utility knives with locking blades (which were not forbidden to passengers at the time), but these were not found among the possessions left behind by the hijackers.[141][142] A flight attendant on Flight 11, a passenger on Flight 175, and passengers on Flight 93 said the hijackers had bombs, but one of the passengers said he thought the bombs were fake. The FBI found no traces of explosives at the crash sites, and the 9/11 Commission concluded that the bombs were probably fake.[114] On at least two of the hijacked flights—American 11 and United 93—the terrorists claimed over the PA system that they were taking hostages and were returning to the airport to have a ransom demand met, a clear attempt to prevent passengers from fighting back. Both attempts failed, however, as both hijacker pilots in these instances (Mohamed Atta[143] and Ziad Jarrah,[144] respectively) keyed the wrong switch and mistakenly transmitted their messages to ATC instead of the people on the plane as intended, tipping off the flight controllers that the planes had been hijacked.

     Duration: 3 minutes and 12 seconds.3:12Security camera footage of American Airlines Flight 77 crashing into the Pentagon;[145] the plane collides with The Pentagon approximately 86 seconds after the start of the recording
    Three buildings in the World Trade Center collapsed due to fire-induced structural failure. Although the South Tower was struck 17 minutes after the North Tower, the plane's impact zone was far lower, at a much faster speed, and into a corner, with the unevenly-balanced additional structural weight causing it to collapse first at 9:59 a.m.,[146]: 80 [147]: 322  having burned for 56 minutes[i] in the fire caused by the crash of United Airlines Flight 175 and the explosion of its fuel. The North Tower lasted another 29 minutes before collapsing at 10:28 a.m.,[j] one hour and forty-two minutes[h] after being struck by American Airlines Flight 11. When the North Tower collapsed, debris fell on the nearby 7 World Trade Center building (7 WTC), damaging the building and starting fires. These fires burned for nearly seven hours, compromising the building's structural integrity, and 7 WTC collapsed at 5:21 p.m.[151][152] The west side of the Pentagon sustained significant damage.

    At 9:42 a.m., the Federal Aviation Administration (FAA) grounded all civilian aircraft within the continental U.S., and civilian aircraft already in flight were told to land immediately.[153] All international civilian aircraft were either turned back or redirected to airports in Canada or Mexico, and were banned from landing on United States territory for three days.[154] The attacks created widespread confusion among news organizations and air traffic controllers. Among unconfirmed and often contradictory news reports aired throughout the day, one of the most prevalent claimed a car bomb had been detonated at the U.S. State Department's headquarters in Washington, D.C.[155] Another jet (Delta Air Lines Flight 1989) was suspected of having been hijacked, but the aircraft responded to controllers and landed safely in Cleveland, Ohio.[156]

    In an April 2002 interview, Khalid Sheikh Mohammed and Ramzi bin al-Shibh, who are believed to have organized the attacks, said Flight 93's intended target was the United States Capitol, not the White House.[157] During the planning stage of the attacks, Mohamed Atta (Flight 11's hijacker and pilot) thought the White House might be too tough a target and sought an assessment from Hani Hanjour (who hijacked and piloted Flight 77).[158] Mohammed said Al-Qaeda initially planned to target nuclear installations rather than the World Trade Center and the Pentagon, but decided against it, fearing things could "get out of control".[159] Final decisions on targets, according to Mohammed, were left in the hands of the pilots.[158] If any pilot could not reach his intended target, he was to crash the plane.[115]

    Casualties
    Main articles: Casualties of the September 11 attacks and Lists of victims of the September 11 attacks
     One of three observable falls from the South Tower.[160] A similar photograph of a victim from the North Tower titled The Falling Man gained wide acclamation.
    The attack on the World Trade Center's North Tower single-handedly[k] made 9/11 the deadliest act of terrorism in world history.[162] Taken together, the four crashes caused the deaths of 2,996 people (including the hijackers) and injured thousands more.[163] The death toll included 265 on the four planes (from which there were no survivors); 2,606 in the World Trade Center and in the surrounding area; and 125 at The Pentagon.[164][165] Most who died were civilians, as well as 343 firefighters, 72 law enforcement officers, 55 military personnel, and the 19 terrorists.[166][167] After New York, New Jersey lost the most state citizens.[168] More than 90 countries lost citizens in the attacks.[169]

    In New York City, more than 90% of the workers and visitors who died in the towers had been at or above the points of impact. In the North Tower, between 1,344[170] and 1,402[171] people were at, above or one floor below the point of impact and all died. Hundreds were killed instantly the moment the plane struck.[172] The estimated 800 people[173] who survived the impact were trapped and died in the fires or from smoke inhalation; fell or jumped from the tower to escape the smoke and flames; or were killed in the building's collapse. The destruction of all three staircases in the North Tower when Flight 11 hit made it impossible for anyone from the impact zone upward to escape. 107 people not trapped by the impact died.[174] When the plane struck between floors 93 and 99, the 92nd floor was also rendered inescapable when the crash severed all elevator shafts while debris falling from the impact zone blocked the stairwells, ensuring the deaths of all 69 workers on the floor below the point of impact.

    In the South Tower, around 600 people were on or above the 77th floor when Flight 175 struck and few survived. As with the North Tower, hundreds were killed at the moment of impact. Unlike those in the North Tower, the estimated 300 survivors[173] of the crash were not technically trapped by the damage done by Flight 175's impact, but most were either unaware that a means of escape still existed or were unable to use it. One stairway, Stairwell A, narrowly avoided being destroyed as Flight 175 crashed through the building, allowing 14 people located on the floors of impact (including Stanley Praimnath, a man who saw the plane coming at him) and four more from the floors above to escape. New York City 9-1-1 operators who received calls from people inside the tower were not well informed of the situation as it rapidly unfolded and as a result, told callers not to descend the tower on their own.[175] In total, 630 people died in the South Tower, fewer than half the number killed in the North Tower.[174] Of the 100–200 people witnessed jumping or falling to their deaths that morning,[176] only three recorded sightings were from the South Tower.[177]: 86  Casualties in the South Tower were significantly reduced because some occupants decided to leave the building immediately following the first crash, and because Eric Eisenberg, an executive at AON Insurance, made the decision to evacuate the floors occupied by AON (floors 92 and 98–105) in the moments following the impact of Flight 11. The 17-minute gap allowed over 900 of the 1,100 AON employees present on-site to evacuate from above the 77th floor before the South Tower was struck; Eisenberg was among the nearly 200 who did not escape. Similar pre-impact evacuations were carried out by companies such as Fiduciary Trust, CSC, and Euro Brokers, all of whom had offices on floors above the point of impact. The failure to order a full evacuation of the South Tower after the first plane crash into the North Tower was described by USA Today as "one of the day's great tragedies".[178]

    As exemplified in the photograph The Falling Man, more than 200 people fell to their deaths from the burning towers, most of whom were forced to jump to escape the extreme heat, fire and smoke.[179] Some occupants of each tower above the point of impact made their way toward the roof in the hope of helicopter rescue, but the roof access doors were locked.[180] No plan existed for helicopter rescues, and the combination of roof equipment, thick smoke and intense heat prevented helicopters from approaching.[181]

    At the World Trade Center complex, a total of 414 emergency workers died as they tried to rescue people and fight fires, while another law enforcement officer was separately killed when United 93 crashed. The New York City Fire Department (FDNY) lost 343 firefighters, including a chaplain and two paramedics.[182][183][184] The New York City Police Department (NYPD) lost 23 officers.[185] The Port Authority Police Department (PAPD) lost 37 officers.[186] Eight emergency medical technicians (EMTs) and paramedics from private emergency medical services (EMS) units were killed.[187] Almost all of the emergency personnel who died at the scene that day were killed as a result of the towers collapsing, with the exception of one who was struck by a civilian falling from the upper floors of the South Tower.[188]

    Cantor Fitzgerald L.P. (an investment bank on the North Tower's 101st–105th floors) lost 658 employees, considerably more than any other employer.[189] Marsh Inc., located immediately below Cantor Fitzgerald on floors 93–100, lost 358 employees,[190][191] and 175 employees of Aon Corporation were also killed.[192] The National Institute of Standards and Technology (NIST) estimated that about 17,400 civilians were in the World Trade Center complex at the time of the attacks. Turnstile counts from the Port Authority suggest 14,154 people were typically in the Twin Towers by 8:45 a.m.[193][page needed][194] Most people below the impact zone safely evacuated the buildings.[195]

    In Arlington County, Virginia, 125 Pentagon workers died when Flight 77 crashed into the building's western side. 70 were civilians and 55 were military personnel, many of whom worked for the United States Army or the United States Navy. The Army lost 47 civilian employees; six civilian contractors; and 22 soldiers, while the Navy lost six civilian employees; three civilian contractors; and 33 sailors. Seven Defense Intelligence Agency (DIA) civilian employees died, and one Office of the Secretary of Defense (OSD) contractor.[196][197][198] Lieutenant General Timothy Maude, an Army Deputy Chief of Staff, was the highest-ranking military official killed at the Pentagon.[199]

    Weeks after the attack, the death toll was estimated to be over 6,000, more than twice the number of deaths eventually confirmed.[200] The city was only able to identify remains for about 1,600 of the World Trade Center victims. The medical examiner's office collected "about 10,000 unidentified bone and tissue fragments that cannot be matched to the list of the dead".[201] Bone fragments were still being found in 2006 by workers who were preparing to demolish the damaged Deutsche Bank Building.

    In 2010, a team of anthropologists and archaeologists searched for human remains and personal items at the Fresh Kills Landfill, where 72 more human remains were recovered, bringing the total found to 1,845. DNA profiling continues in an attempt to identify additional victims.[202][203][204] The remains are being held in storage in Memorial Park, outside the New York City Medical Examiner's facilities. It was expected that the remains would be moved in 2013 to a repository behind a wall at the 9/11 museum.[needs update][205]

    In July 2011, a team of scientists at the Office of Chief Medical Examiner continued efforts to identify remains, in the hope that improved technology will allow them to identify other victims.[204] In August 2017, the 1,641st victim was identified as a result of newly available DNA technology,[206] and a 1,642nd during July 2018.[207] Three more victims were identified in October 2019,[208] two in September 2021[209] and an additional two in September 2023.[210] As of September 2023, 1,104 victims remain unidentified,[210] amounting to 40% of the deaths in the World Trade Center attacks.[209] On September 25, 2023, the FDNY reported that with the death of EMT Hilda Vannata and retired firefighter Robert Fulco, marking the 342nd and 343rd deaths from 9/11-related illnesses, the department had now lost the same number of firefighters, EMTs, and civilian members to 9/11-related illnesses as it did on the day of the attacks.[211][212]

    Damage
    Further information: Collapse of the World Trade Center
     The World Trade Center site, called Ground Zero, with an overlay showing the original buildings' locations
    Along with the 110-floor Twin Towers, numerous other buildings at the World Trade Center site were destroyed or badly damaged, including WTC buildings 3 through 7 and St. Nicholas Greek Orthodox Church.[213] The North Tower, South Tower, the Marriott Hotel (3 WTC), and 7 WTC were destroyed. The U.S. Customs House (6 World Trade Center), 4 World Trade Center, 5 World Trade Center, and both pedestrian bridges connecting buildings were severely damaged. The Deutsche Bank Building (still popularly referred to as the Bankers Trust Building) on 130 Liberty Street was partially damaged and demolished some years later, starting in 2007.[214][215] The two buildings of the World Financial Center also suffered damage.[214] The last fires at the World Trade Center site were extinguished on December 20, exactly 100 days after the attacks.[216]

    The Deutsche Bank Building across Liberty Street from the World Trade Center complex was later condemned as uninhabitable because of toxic conditions inside the office tower and was deconstructed.[217][218] The Borough of Manhattan Community College's Fiterman Hall at 30 West Broadway was condemned due to extensive damage from the attacks, and then reopened in 2012.[219]

    Other neighbouring buildings (including 90 West Street and the Verizon Building) suffered major damage but have been restored.[220] World Financial Center buildings, One Liberty Plaza, the Millenium Hilton, and 90 Church Street had moderate damage and have since been restored.[221] Communications equipment on top of the North Tower was also destroyed, with only WCBS-TV maintaining a backup transmitter on the Empire State Building, but media stations were quickly able to reroute the signals and resume their broadcasts.[213][222]

     A September 14 aerial view of the Pentagon during cleanup operations
    The PATH train system's World Trade Center station was located under the complex. As a result, the station was demolished when the towers collapsed, and the tunnels leading to Exchange Place station in Jersey City, New Jersey, were flooded with water.[223] The station was rebuilt as the $4 billion World Trade Center Transportation Hub, which reopened in March 2015.[224][225] The Cortlandt Street station on the New York City Subway's IRT Broadway–Seventh Avenue Line was also in close proximity to the World Trade Center complex, and the entire station, along with the surrounding track, was reduced to rubble.[226] The latter station was rebuilt and reopened to the public on September 8, 2018.[227] The Pentagon was extensively damaged by the impact of American Airlines Flight 77 and the ensuing fires, causing one section of the building to collapse.[228] As the aeroplane approached the Pentagon, its wings knocked down light poles and its right engine hit a power generator before crashing into the western side of the building.[229][230] The plane hit the Pentagon at the first-floor level. The front part of the fuselage disintegrated on impact, while the mid and tail sections kept moving for another fraction of a second.[231] Debris from the tail section penetrated the furthest into the building, breaking through 310 feet (94 m) of the three outermost of the building's five rings.[231][232]

    Rescue efforts
    Main article: Rescue and recovery effort after the September 11 attacks on the World Trade Center
    See also: List of emergency and first responder agencies that responded to the September 11 attacks
     Patrol Boat Hocking of the U.S. Army Corps of Engineers on its way to assist the site on September 11, 2001
    The New York City Fire Department (FDNY) deployed more than 200 units (approximately half of the department) to the World Trade Center.[233] Their efforts were supplemented by numerous off-duty firefighters and emergency medical technicians.[234][233][235] The New York City Police Department (NYPD) sent its Emergency Service Units and other police personnel and deployed its aviation unit.[236] The NYPD aviation unit assessed the situation and decided that helicopter rescues from the towers were not feasible.[237] Numerous police officers of the Port Authority Police Department (PAPD) also participated in rescue efforts.[238] Once on the scene, the FDNY, the NYPD, and the PAPD did not coordinate efforts and performed redundant searches for civilians.[234][239]

    As conditions deteriorated, the NYPD aviation unit relayed information to police commanders, who issued orders for personnel to evacuate the towers; most NYPD officers were able to safely evacuate before the buildings collapsed.[239][240] With separate command posts set up and incompatible radio communications between the agencies, warnings were not passed along to FDNY commanders.[241]

    After the first tower collapsed, FDNY commanders issued evacuation warnings. Due to technical difficulties with malfunctioning radio repeater systems, many firefighters never heard the evacuation orders. 9-1-1 dispatchers also received information from callers that was not passed along to commanders on the scene.[233]

    Reactions
    Main article: Reactions to the September 11 attacks
    See also: Timeline for September following the September 11 attacks
    The 9/11 attacks resulted in immediate responses to the event, including domestic reactions; closings and cancellations; hate crimes; Muslim-American responses to the event; international responses to the attack; and military responses to the events. Shortly after the attacks, a U.S. government fund that was created by an Act of Congress named the September 11th Victim Compensation Fund.[242][243] The purpose of the fund was to compensate the victims of the attacks and their families with the quid pro quo of their agreement not to file lawsuits against the airline corporations involved.[244] Legislation authorizes the fund to disburse a maximum of $7.375 billion, including operational and administrative costs, of U.S. government funds.[245] The fund was set to expire by 2020 but was in 2019 prolonged to allow claims to be filed until October 2090.[246][247]

    Immediate response
    Further information: U.S. military response during the September 11 attacks
    See also: Communication during the September 11 attacks
     President George W. Bush is briefed in Sarasota, Florida, where he learned of the attacks unfolding while visiting Emma E. Booker Elementary School.
     Eight hours after the attacks, U.S. Secretary of Defense Donald Rumsfeld declares "The Pentagon is functioning"
    At 8:32 a.m., FAA officials were notified Flight 11 had been hijacked and they, in turn, notified the North American Aerospace Defense Command (NORAD). NORAD scrambled two F-15s from Otis Air National Guard Base in Massachusetts and they were airborne by 8:53 a.m. Because of slow and confused communication from FAA officials, NORAD had nine minutes' notice, and no notice about any of the other flights before they crashed.

    After both of the Twin Towers had already been hit, more fighters were scrambled from Langley Air Force Base in Virginia at 9:30 a.m.[248] At 10:20 a.m., Vice President Dick Cheney issued orders to shoot down any commercial aircraft that could be positively identified as being hijacked. These instructions were not relayed in time for the fighters to take action.[248][249][250] Some fighters took to the air without live ammunition, knowing that to prevent the hijackers from striking their intended targets, the pilots might have to intercept and crash their fighters into the hijacked planes, possibly ejecting at the last moment.[251]

    For the first time in U.S. history, the emergency preparedness plan called Security Control of Air Traffic and Air Navigation Aids (SCATANA) was invoked,[252] thus stranding tens of thousands of passengers across the world.[253] Ben Sliney, in his first day as the National Operations Manager of the FAA,[254] ordered that American airspace would be closed to all international flights, causing about 500 flights to be turned back or redirected to other countries. Canada received 226 of the diverted flights and launched Operation Yellow Ribbon to deal with the large numbers of grounded planes and stranded passengers.[255]

    The 9/11 attacks had immediate effects on the American people.[256] Police and rescue workers from around the country took a leave of absence from their jobs and travelled to New York City to help recover bodies from the twisted remnants of the Twin Towers.[257] Blood donations across the U.S. surged in the weeks after 9/11.[258][259]

    The deaths of adults in the attacks resulted in over 3,000 children losing a parent.[260] Subsequent studies documented children's reactions to these actual losses and feared losses of life, the protective environment in the attacks' aftermath, and the effects on surviving caregivers.[261][262][263]

    Domestic reactions
    Further information: U.S. government response to the September 11 attacks
     
    President Bush addressing the nation from the White House at 8:30 PM ET
     
    Bush speaking to rescue workers at Ground Zero on September 14
     
    Duration: 34 minutes and 18 seconds.34:18
    During a speech to a joint session of Congress, President George W. Bush pledges "to defend freedom against terrorism". September 20, 2001 (audio only).
    Following the attacks, President George W. Bush's approval rating increased to 90%.[264] On September 20, 2001, he addressed the nation and a joint session of Congress regarding the events of September 11 and the subsequent nine days of rescue and recovery efforts, and described his intended response to the attacks. New York City mayor Rudy Giuliani's highly visible role resulted in praise in New York and nationally.[265]

    Many relief funds were immediately set up to assist the attacks' victims, with the task of providing financial assistance to the survivors of the attacks and the victims' families. By the deadline for victims' compensation on September 11, 2003, 2,833 applications had been received from the families of those who were killed.[266]

    Contingency plans for the continuity of government and the evacuation of leaders were implemented soon after the attacks.[253] Congress was not told that the United States had been under a continuity of government status until February 2002.[267]

    In the largest restructuring of the U.S. government in contemporary history, the United States enacted the Homeland Security Act of 2002, creating the U.S. Department of Homeland Security. Congress also passed the USA PATRIOT Act, saying it would help detect and prosecute terrorism and other crimes.[268] Civil liberties groups have criticized the PATRIOT Act, saying it allows law enforcement to invade citizens' privacy and that it eliminates judicial oversight of law enforcement and domestic intelligence.[269][270][271]

    To effectively combat future acts of terrorism, the National Security Agency (NSA) was given broad powers. NSA commenced warrantless surveillance of telecommunications, which was sometimes criticized as permitting the agency "to eavesdrop on telephone and e-mail communications between the United States and people overseas without a warrant".[272] In response to requests by various intelligence agencies, the United States Foreign Intelligence Surveillance Court permitted an expansion of powers by the U.S. government in seeking, obtaining, and sharing information on U.S. citizens as well as non-U.S. people from around the world.[273]

    Hate crimes
    See also: Islamophobic incidents and Persecution of Muslims
    Six days after the attacks, President Bush made a public appearance at Washington, D.C.'s largest Islamic Center and acknowledged the "incredibly valuable contribution" that millions of American Muslims made to their country and called for them "to be treated with respect".[274] Numerous incidents of harassment and hate crimes against Muslims and South Asians were reported in the days following the attacks.[275][276][277]

    Sikhs were also subject to targeting due to the use of turbans in the Sikh faith, which are stereotypically associated with Muslims. There were reports of attacks on mosques and other religious buildings (including the firebombing of a Hindu temple), and assaults on individuals, including one murder: Balbir Singh Sodhi, a Sikh mistaken for a Muslim, who was fatally shot on September 15, 2001, in Mesa, Arizona.[277] Two dozen members of Osama bin Laden's family were urgently evacuated out of the country on a private charter plane under FBI supervision three days after the attacks.[278]

    According to an academic study, people perceived to be Middle Eastern were as likely to be victims of hate crimes as followers of Islam during this time. The study also found a similar increase in hate crimes against people who may have been perceived as Muslims, Arabs, and others thought to be of Middle Eastern origin.[279] A report by the South Asian American advocacy group known as South Asian Americans Leading Together documented media coverage of 645 bias incidents against Americans of South Asian or Middle Eastern descent between September 11 and 17, 2001. Various crimes such as vandalism, arson, assault, shootings, harassment, and threats in numerous places were documented.[280][281] Women wearing hijab were also targeted.[282]

    Discrimination and racial profiling
    Further information: Detentions following the September 11 attacks, Islamophobia in the United States, and Flying while Muslim
    See also: Airport racial profiling in the United States
    A poll of Arab-Americans, conducted in May 2002, found that 20% had personally experienced discrimination since September 11. A July 2002 poll of Muslim Americans found that 48% believed their lives had changed for the worse since September 11, and 57% had experienced an act of bias or discrimination.[282]

    Following the September 11 attacks, many Pakistani Americans identified themselves as Indians to avoid potential discrimination and obtain jobs (Pakistan was created as a result of the partition of India in 1947).[283]

    By May 2002, there were 488 complaints of employment discrimination reported to the U.S. Equal Employment Opportunity Commission (EEOC). 301 of those were complaints from people fired from their jobs. Similarly, by June 2002, the U.S. Department of Transportation (DOT) had investigated 111 September 11th-related complaints from airline passengers purporting that their religious or ethnic appearance caused them to be singled out at security screenings. DOT investigated an additional 31 complaints from people who alleged they were completely blocked from boarding aeroplanes on the same grounds.[282]

    Muslim American response
    See also: Muslim attitudes towards terrorism and Peace in Islamic philosophy
    Muslim organizations in the United States were swift to condemn the attacks and called "upon Muslim Americans to come forward with their skills and resources to help alleviate the sufferings of the affected people and their families".[284] These organizations included the Islamic Society of North America, American Muslim Alliance, American Muslim Council, Council on American-Islamic Relations, Islamic Circle of North America, and the Shari'a Scholars Association of North America. Along with monetary donations, many Islamic organizations launched blood drives and provided medical assistance, food, and shelter for victims.[285][286][287]

    Interfaith efforts
    Curiosity about Islam increased after the attacks. As a result, many mosques and Islamic centres began holding open houses and participating in outreach efforts to educate non-Muslims about the faith. In the first 10 years after the attacks, interfaith community service increased from 8 to 20 percent and the percentage of U.S. congregations involved in interfaith worship doubled from 7 to 14 percent.[288]

    International reactions
     President of Russia Vladimir Putin (right) with his wife (center) at a commemoration service in New York City on November 16
    The attacks were denounced by mass media and governments worldwide. Across the globe, nations offered pro-American support and solidarity.[289] Leaders in most Middle Eastern countries, as well as Libya and Afghanistan, condemned the attacks. Iraq was a notable exception, with an immediate official statement that "the American cowboys are reaping the fruit of their crimes against humanity".[290] The government of Saudi Arabia officially condemned the attacks, but privately many Saudis favored bin Laden's cause.[291][292]

    Although Palestinian Authority (PA) president Yasser Arafat also condemned the attacks, there were reports of celebrations of disputed size in the West Bank, Gaza Strip, and East Jerusalem.[293][294] Palestinian leaders discredited news broadcasters that justified the attacks or showed celebrations,[295] and the Authority claimed such celebrations do not represent the Palestinians' sentiment, adding that it would not allow "a few kids" to "smear the real face of the Palestinians".[296][297] Footage by CNN[vague] and other news outlets were suggested by a report originating at a Brazilian university to be from 1991; this was later proven to be a false accusation, resulting in a statement being issued by CNN.[298][299] As in the United States, the aftermath of the attacks saw tensions increase in other countries between Muslims and non-Muslims.[300]

    United Nations Security Council Resolution 1368 condemned the attacks and expressed readiness to take all necessary steps to respond and combat all forms of terrorism in accordance with their Charter.[301] Numerous countries introduced anti-terrorism legislation and froze bank accounts they suspected of Al-Qaeda ties.[302][303] Law enforcement and intelligence agencies in a number of countries arrested alleged terrorists.[304][305]

    British Prime Minister Tony Blair said Britain stood "shoulder to shoulder" with the United States.[306] A few days later, Blair flew to Washington, D.C., to affirm British solidarity with the United States. In a speech to Congress nine days after the attacks, which Blair attended as a guest, President Bush declared "America has no truer friend than Great Britain".[307] Subsequently, Prime Minister Blair embarked on two months of diplomacy to rally international support for military action; he held 54 meetings with world leaders and travelled more than 40,000 miles (60,000 km).[308]

    The U.S. set up the Guantanamo Bay detention camp to hold inmates they defined as "illegal enemy combatants". The legitimacy of these detentions has been questioned by the European Union and human rights organizations.[309][310][311]

    On September 25, 2001, Iran's fifth president, Mohammad Khatami, meeting British Foreign Secretary Jack Straw, said: "Iran fully understands the feelings of the Americans about the terrorist attacks in New York and Washington on September 11". He said although the American administrations had been at best indifferent about terrorist operations in Iran (since 1979), the Iranians felt differently and had expressed their sympathetic feelings with bereaved Americans in the tragic incidents in the two cities. He also stated that "Nations should not be punished in place of terrorists".[312]

    According to Radio Farda's website, when the news of the attacks was released, some Iranian citizens gathered in front of the Embassy of Switzerland in Tehran, which serves as the protecting power of the United States in Iran (U.S. interests-protecting office in Iran), to express their sympathy, and some of them lit candles as a symbol of mourning. This piece of news on Radio Farda's website also states that in 2011, on the anniversary of the attacks, the United States Department of State published a post on its blog, in which the Department thanked the Iranian people for their sympathy and stated that it would never forget Iranian people's kindness on those harsh days.[313] After the attacks, both the President[314][315] and the Supreme Leader of Iran, condemned the attacks. The BBC and Time magazine published reports on holding candlelit vigils for the victims of Iranian citizens on their websites.[316][317] According to Politico Magazine, following the attacks, Ali Khamenei, the Supreme Leader of Iran, "suspended the usual 'Death to America' chants at Friday prayers" temporarily.[318]

    In September 2001, shortly after the attacks, some fans of AEK Athens burned an Israeli flag and unsuccessfully tried to burn an American flag. Though the American flag did not catch fire, the fans booed during a moment of silence for victims of the attacks.[319]

    Military operations
    Further information: War on terror and US invasion of Afghanistan
    Events leading up
    to the Iraq War
     
    14 July Revolution 1958
    Iraqi–Kurdish conflict 1961–1991
    17 July Revolution 1968
    Iranian Revolution 1978–1979
    Ba'ath Party Purge 1979
    Iran–Iraq War 1980–1988
    Iraqgate 1982–c.1990
    Iraqi invasion of Kuwait 1990
    Gulf War 1990–1991
    Sanctions against Iraq 1990–2003
    Iraqi uprisings 1991
    Iraqi no-fly zones conflict 1991–2003
    Iraq disarmament crisis 1991–2003
    Arms-to-Iraq affair 1992–1996
    September 11 attacks 2001
    U.S. anthrax attacks 2001
    U.S. invasion of Afghanistan 2001
    Alleged Prague connection 2001
    Iraq Resolution 2002
    Wood Green ricin plot 2003
    Colin Powell's UN presentation 2003
    v
    t
    e
    At 2:40 p.m. on September 11, Secretary of Defense Donald Rumsfeld was issuing rapid orders to his aides to look for evidence of Iraqi involvement. According to notes taken by senior policy official Stephen Cambone, Rumsfeld asked for, "Best info fast. Judge whether they are good enough to hit S.H. [Saddam Hussein] at the same time. Not only UBL" [Osama bin Laden].[320] Cambone's notes quoted Rumsfeld as saying, "Need to move swiftly – Near term target needs – go massive – sweep it all up. Things related and not".[321][322]

    In a meeting at Camp David on September 15 the Bush administration rejected the idea of attacking Iraq in response to the September 11 attacks.[323] Nonetheless, they later invaded the country with allies, citing "Saddam Hussein's support for terrorism".[324] At the time, as many as seven in ten Americans believed the Iraqi president played a role in the 9/11 attacks.[325] Three years later, Bush conceded that he had not.[326]

    The NATO council declared that the terrorist attacks on the United States were an attack on all NATO nations that satisfied Article 5 of the NATO charter. This marked the first invocation of Article 5, which had been written during the Cold War with an attack by the Soviet Union in mind.[327] Australian Prime Minister John Howard, who was in Washington, D.C., during the attacks, invoked Article IV of the ANZUS treaty.[328] The Bush administration announced a war on terror, with the stated goals of bringing bin Laden and Al-Qaeda to justice and preventing the emergence of other terrorist networks.[329] These goals would be accomplished by imposing economic and military sanctions against states harbouring terrorists, and increasing global surveillance and intelligence sharing.[330]

    On September 14, 2001, the U.S. Congress passed the Authorization for the use of Military Force Against Terrorists, which grants the President the authority to use all "necessary and appropriate force" against those whom he determined "planned, authorized, committed or aided" the September 11 attacks or who harboured said persons or groups. It is still in effect to this day.[331]

    On October 7, 2001, the War in Afghanistan began when U.S. and British forces initiated aerial bombing campaigns targeting Taliban and Al-Qaeda camps, then later invaded Afghanistan with ground troops of the Special Forces.[citation needed] This eventually led to the overthrow of the Taliban's rule of Afghanistan with the Fall of Kandahar on December 7, 2001, by U.S.-led coalition forces.[332]

    Al-Qaeda leader Osama bin Laden, who went into hiding in the White Mountains, was targeted by U.S. coalition forces in the Battle of Tora Bora,[333] but he escaped across the Pakistani border and would remain out of sight for almost ten years.[333] In an interview with Tayseer Allouni on 21 October 2001, Bin Laden stated:

    "The events proved the extent of terrorism that America exercises in the world. Bush stated that the world has to be divided in two: Bush and his supporters, and any country that doesn't get into the global crusade is with the terrorists. What terrorism is clearer than this? Many governments were forced to support this "new terrorism.".. America wouldn't live in security until we live it truly in Palestine. This showed the reality of America, which puts Israel's interest above its own people's interest. America won't get out of this crisis until it gets out of the Arabian Peninsula, and until it stops its support of Israel.[334]
    The Philippines and Indonesia, among other nations with their internal conflicts with Islamic terrorism, also increased their military readiness.[335][336] The military forces of the United States of America and the Islamic Republic of Iran cooperated to overthrow the Taliban regime, which had had conflicts with the government of Iran.[318][337][338][339]Iran's Quds Force helped U.S. forces and Afghan rebels in the 2001 uprising in Herat.[340][341][342]

    Aftermath
    Main article: Aftermath of the September 11 attacks
    See also: Post-9/11
    Health issues
    Main article: Health effects arising from the September 11 attacks
     Survivors covered in dust after the collapse of the World Trade towers; a photograph of another dust-covered victim Marcy Borders (1973–2015) subsequently gained much attention[343][344]
    Hundreds of thousands of tons of toxic debris containing more than 2,500 contaminants and known carcinogens were spread across Lower Manhattan when the Twin Towers' collapsed.[345][346] Exposure to the toxins in the debris is alleged to have contributed to fatal or debilitating illnesses among people who were at Ground Zero.[347][348] The Bush administration ordered the Environmental Protection Agency (EPA) to issue reassuring statements regarding air quality in the aftermath of the attacks, citing national security, but the EPA did not determine that air quality had returned to pre-September 11 levels until June 2002.[349]

    Health effects extended to residents, students, and office workers of Lower Manhattan and nearby Chinatown.[350] Several deaths have been linked to the toxic dust, and victims' names were included in the World Trade Center memorial.[351] Approximately 18,000 people have been estimated to have developed illnesses as a result of the toxic dust.[352] There is also scientific speculation that exposure to various toxic products in the air may have negative effects on fetal development.[citation needed] A study of rescue workers released in April 2010 found that all those studied had impaired lung functions and that 30%–40% were reporting little or no improvement in persistent symptoms that started within the first year of the attack.[353]

    Years after the attacks, legal disputes over the costs of illnesses related to the attacks were still in the court system. On October 17, 2006, a federal judge rejected New York City's refusal to pay for health costs for rescue workers, allowing for the possibility of numerous suits against the city.[354] Government officials have been faulted for urging the public to return to lower Manhattan in the weeks shortly after the attacks. Christine Todd Whitman, administrator of the EPA in the attacks' aftermath, was heavily criticized by a U.S. District Judge for incorrectly saying that the area was environmentally safe.[355] Mayor Giuliani was criticized for urging financial industry personnel to return quickly to the greater Wall Street area.[356]

    On December 22, 2010, the United States Congress passed the James L. Zadroga 9/11 Health and Compensation Act, which President Barack Obama signed into law on January 2, 2011. It allocated $4.2 billion to create the World Trade Center Health Program, which provides testing and treatment for people suffering from long-term health problems related to the 9/11 attacks.[357][358] The WTC Health Program replaced preexisting 9/11-related health programs such as the Medical Monitoring and Treatment Program and the WTC Environmental Health Center program.[358]

    In 2020, the NYPD confirmed that 247 NYPD police officers had died due to 9/11-related illnesses. In September 2022, the FDNY confirmed that the total number of firefighters who died due to 9/11-related illnesses was 299. Both agencies believe that the death toll will rise dramatically in the coming years. The Port Authority of New York and New Jersey Police Department (PAPD), the law enforcement agency with jurisdiction over the World Trade Center due to the Port Authority of New York and New Jersey owning the site confirmed that four of its police officers have died of 9/11-related illnesses. The chief of the PAPD at the time, Joseph Morris, made sure that industrial-grade respirators were provided to all PAPD police officers within 48 hours and decided that the same 30 to 40 police officers would be stationed at the World Trade Center pile, drastically lowering the number of total PAPD personnel who would be exposed to the air. The FDNY and NYPD had rotated hundreds, if not thousands, of different personnel from all over New York City to the pile, which exposed many of them to dust that would give them cancer or other diseases years or decades later. Also, they were not given adequate respirators and breathing equipment that could have prevented future diseases.[359][360][361][362]

    Economic
    Main article: Economic effects of the September 11 attacks
     U.S. deficit and debt increases in the seven years following the attacks from 2001 to 2008
    The attacks had a significant economic impact on the United States and world markets.[363][364] The stock exchanges did not open on September 11 and remained closed until September 17. Reopening, the Dow Jones Industrial Average (DJIA) fell 684 points, or 7.1%, to 8921, a record-setting one-day point decline.[365] By the end of the week, the DJIA had fallen 1,369.7 points (14.3%), at the time its largest one-week point drop in history. In 2001 dollars, U.S. stocks lost $1.4 trillion in valuation for the week.[366]

    In New York City, about 430,000 job months and $2.8 billion in wages were lost in the first three months after the attacks. The economic effects were mainly on the economy's export sectors.[367][368][369] The city's GDP was estimated to have declined by $27.3 billion for the last three months of 2001 and all of 2002. The U.S. government provided $11.2 billion in immediate assistance to the Government of New York City in September 2001, and $10.5 billion in early 2002 for economic development and infrastructure needs.[370]

    Also hurt were small businesses in Lower Manhattan near the World Trade Center (18,000 of which were destroyed or displaced), resulting in lost jobs and wages. Assistance was provided by Small Business Administration loans; federal government Community Development Block Grants; and Economic Injury Disaster Loans.[370] Some 31,900,000 square feet (2,960,000 m2) of Lower Manhattan office space was damaged or destroyed.[371] Many wondered whether these jobs would return, and if the damaged tax base would recover.[372] Studies of 9/11's economic effects show the Manhattan office real-estate market and office employment were less affected than first feared, because of the financial services industry's need for face-to-face interaction.[373][374]

    North American air space was closed for several days after the attacks and air travel decreased upon its reopening, leading to a nearly 20% cutback in air travel capacity, and exacerbating financial problems in the struggling U.S. airline industry.[375]

    The September 11 attacks also led to the U.S. wars in Afghanistan and Iraq,[376] as well as additional homeland security spending, totaling at least $5 trillion.[377]

    Effects in Afghanistan
    Further information: War in Afghanistan (2001–2021), Aftermath of the War in Afghanistan (2001–2021), and Killing of Ayman al-Zawahiri
    If Americans are clamouring to bomb Afghanistan back to the Stone Age, they ought to know that this nation does not have so far to go. This is a post-apocalyptic place of felled cities, parched land and downtrodden people.
    — Barry Bearak, The New York Times, September 13, 2001[378]
    Most of the Afghan population was already going hungry at the time of the September 11 attacks.[379] In the aftermath of the attacks, tens of thousands of people attempted to flee Afghanistan due to the possibility of military retaliation by the United States. Pakistan, already home to many Afghan refugees from previous conflicts, closed its border with Afghanistan on September 17, 2001.[380] Thousands of Afghans also fled to the frontier with Tajikistan, although were denied entry.[381] The Taliban leaders in Afghanistan themselves pleaded against military action, saying "We appeal to the United States not to put Afghanistan into more misery because our people have suffered so much", referring to two decades of conflict and the humanitarian crisis attached to it.[378]

    All United Nations expatriates had left Afghanistan after the attacks and no national or international aid workers were at their post. Workers were instead preparing in bordering countries like Pakistan, China and Uzbekistan to prevent a potential "humanitarian catastrophe", amid a critically low food stock for the Afghan population.[382] The World Food Programme stopped importing wheat to Afghanistan on September 12 due to security risks.[383] The Wall Street Journal suggested the creation of a buffer zone in an inevitable war, similarly as in the Bosnian War.[384]

     
     
    From left to right: U.S. soldiers engaged in the War on Terror in Afghanistan in May 2006 • Army Major General Chris Donahue left Afghanistan as the final American soldier on August 30, 2021
    Approximately one month after the attacks, the United States led a broad coalition of international forces to overthrow the Taliban regime from Afghanistan for their harboring of Al-Qaeda.[380] Though Pakistani authorities were initially reluctant to align themselves with the United States against the Taliban, they permitted the coalition access to their military bases, and arrested and handed over to the U.S. over 600 suspected Al-Qaeda members.[385][386]

    In a speech by the Nizari Ismaili Imam at the Nobel Institute in 2005, Aga Khan IV stated that the "9/11 attack on the United States was a direct consequence of the international community ignoring the human tragedy that was Afghanistan at that time".[387]

    In 2011, the U.S. and NATO under President Obama initiated a drawdown of troops in Afghanistan finalized in 2016. During the presidencies of Donald Trump and Joe Biden in 2020 and 2021, the United States alongside its NATO allies withdrew all troops from Afghanistan completing the withdrawal of all regular U.S. troops on August 30, 2021, 12 days before the 20th anniversary of the September 11 attacks,[150][388][389] The withdrawal marked the end of the 2001–2021 War in Afghanistan. Biden said that after nearly 20 years of war, it was clear that the U.S. military could not transform Afghanistan into a modern democracy.[390]

    The second emir of Al-Qaeda, Ayman al-Zawahiri, a close associate of bin Laden, was killed in a U.S. drone strike at his home in Kabul, Afghanistan on July 31, 2022.[391]

    Cultural influence
    Main article: Cultural influence of the September 11 attacks
    Further information: List of cultural references to the September 11 attacks, Entertainment affected by the September 11 attacks, and Osama bin Laden in popular culture
    See also: Osama bin Laden (elephant)
    The impact of 9/11 extends beyond geopolitics and into society and culture in general. Immediate responses to 9/11 included greater focus on home life and time spent with family, higher church attendance, and increased expressions of patriotism such as the flying of American flags.[392] The radio industry responded by removing certain songs from playlists, and the attacks have subsequently been used as background, narrative, or thematic elements in film, music, literature, and humour. Already-running television shows as well as programs developed after 9/11 have reflected post-9/11 cultural concerns.[393]

    9/11 conspiracy theories have become a social phenomenon, despite a lack of support from expert scientists, engineers, and historians.[394] 9/11 has also had a major impact on the religious faith of many individuals; for some it strengthened, to find consolation to cope with the loss of loved ones and overcome their grief; others started to question their faith or lose it entirely because they could not reconcile it with their view of religion.[395][396]

    The culture of America, after the attacks, is noted for heightened security and an increased demand thereof, as well as paranoia and anxiety regarding future terrorist attacks against most of the nation. Psychologists have also confirmed that there has been an increased amount of national anxiety in commercial air travel.[397] Anti-Muslim hate crimes rose nearly ten-fold in 2001 and have subsequently remained "roughly five times higher than the pre-9/11 rate".[398]

    Government policies towards terrorism
    Further information: War on terror, Anti-terrorism legislation, Airport security repercussions due to the September 11 attacks, and Legal issues related to the September 11 attacks
    See also: Senate Intelligence Committee report on CIA torture
     Alleged "extraordinary rendition" illegal flights of the CIA, as reported by Polish newspaper Rzeczpospolita[399]
    As a result of the attacks, many governments across the world passed legislation to combat terrorism.[400] In Germany, where several of the 9/11 terrorists had resided and taken advantage of that country's liberal asylum policies, two major anti-terrorism packages were enacted. The first removed legal loopholes that permitted terrorists to live and raise money in Germany. The second addressed the effectiveness and communication of intelligence and law enforcement.[401] Canada passed the Canadian Anti-Terrorism Act, their first anti-terrorism law.[402] The United Kingdom passed the Anti-terrorism, Crime and Security Act 2001 and the Prevention of Terrorism Act 2005.[403][404] New Zealand enacted the Terrorism Suppression Act 2002.[405]

    In the United States, the Department of Homeland Security was created by the Homeland Security Act of 2002 to coordinate domestic anti-terrorism efforts. The USA Patriot Act gave the federal government greater powers, including the authority to detain foreign terror suspects for a week without charge; to monitor terror suspects' telephone communications, e-mail, and Internet use; and to prosecute suspected terrorists without time restrictions. The FAA ordered that aeroplane cockpits be reinforced to prevent terrorists from gaining control of planes and assigned sky marshals to flights.

    Further, the Aviation and Transportation Security Act made the federal government, rather than airports, responsible for airport security. The law created the Transportation Security Administration to inspect passengers and luggage, causing long delays and concern over passenger privacy.[406] After suspected abuses of the USA Patriot Act were brought to light in June 2013 with articles about the collection of American call records by the NSA and the PRISM program (see Global surveillance disclosures (2013–present)), Representative Jim Sensenbrenner,(R- Wisconsin) who introduced the Patriot Act in 2001, said that the NSA overstepped its bounds.[407][408]

    Criticism of the war on terror has focused on its morality, efficiency, and cost. According to a 2021 study conducted under the auspices of the Watson Institute for International and Public Affairs, the several post-9/11 wars participated in by the United States in its War on Terror have caused the displacement, conservatively calculated, of 38 million people in Afghanistan, Pakistan, Iraq, Libya, Syria, Yemen, Somalia, and the Philippines.[409][410][411] The study estimated these wars caused the deaths of 897,000 to 929,000 people and cost $8 trillion.[411] The U.S. Constitution and U.S. law prohibits the use of torture, yet such human rights violations occurred during the War on Terror under the euphemism "enhanced interrogation".[412][413] In 2005, The Washington Post and Human Rights Watch (HRW) published revelations concerning CIA flights and "black sites", covert prisons operated by the CIA.[414][415] The term "torture by proxy" is used by some critics to describe situations in which the CIA and other U.S. agencies have transferred suspected terrorists to countries known to employ torture.[416][417]

    Legal proceedings
    Main articles: Trials related to the September 11 attacks and United States v. Khalid Sheikh Mohammed
    As all 19 hijackers died in the attacks, they were never prosecuted. Osama bin Laden was never formally indicted but was after a 10-year manhunt killed by U.S. special forces on May 2, 2011 in his compound in Abbottabad, Pakistan.[l][418] The main trial of the attacks against Mohammed and his co-conspirators Walid bin Attash, Ramzi bin al-Shibh, Ammar al-Baluchi, and Mustafa Ahmad al Hawsawi remains unresolved. Khalid Sheikh Mohammed was arrested on March 1, 2003, in Rawalpindi, Pakistan, by Pakistani security officials working with the CIA. He was then held at multiple CIA secret prisons and Guantanamo Bay, where he was interrogated and tortured with methods including waterboarding.[419][420] In 2003, Mustafa al-Hawsawi and Abd al-Aziz Ali were arrested and transferred to US custody. Both would later be accused of providing money and travel assistance to the hijackers.[421] During U.S. hearings at Guantanamo Bay in March 2007, Mohammed again confessed his responsibility for the attacks, stating he "was responsible for the 9/11 operation from A to Z" and that his statement was not made under duress.[42][422] In January 2023, the US government opened up about a potential plea deal,[423] with Biden giving up on the effort in September that year.[424]

    To date, only peripheral persons have thus been convicted for charges in connection with the attacks. These include:

    Zacarias Moussaoui who was indicted in December 2001 and sentenced to life in prison without the possibility of parole in May 2006 by a U.S. federal jury
    Mounir El Motassadeq who was first convicted in February 2003 by a Federal Court of Justice in Germany and was deported to Morocco in October 2018 after serving his sentence[425]
    Abu Dahdah who was arrested in November 2001, sentenced by a Spanish High Court and released from prison in May 2013.[426]
    Investigations
    FBI
    Further information: Hijackers in the September 11 attacks
    Immediately after the attacks, the Federal Bureau of Investigation started PENTTBOM, the largest criminal inquiry in United States history. At its height, more than half of the FBI's agents worked on the investigation and followed a half-million leads.[427] The FBI concluded that there was "clear and irrefutable" evidence linking Al-Qaeda and bin Laden to the attacks.[428]

     Mohamed Atta was one of the main planners of the attacks and the operational leader, responsible for crashing Flight 11 into the North Tower
    The FBI quickly identified the hijackers, including leader Mohamed Atta, when his luggage was discovered at Boston's Logan Airport. Atta had been forced to check two of his three bags due to space limitations on the 19-seat commuter flight he took to Boston. Due to a new policy instituted to prevent flight delays, the luggage failed to make it aboard American Airlines Flight 11 as planned. The luggage contained the hijackers' names, assignments, and Al-Qaeda connections. "It had all these Arab-language [sic] papers that amounted to the Rosetta stone of the investigation", said one FBI agent.[429] Within hours of the attacks, the FBI released the names and in many cases the personal details of the suspected pilots and hijackers.[430][431] Abu Jandal, who served as bin Laden's chief bodyguard for years, confirmed the identity of seven hijackers as Al-Qaeda members during interrogations with the FBI on September 17. He had been jailed in a Yemeni prison since 2000.[432][433] On September 27, 2001, photos of all 19 hijackers were released, along with information about possible nationalities and aliases.[434] Fifteen of the men were from Saudi Arabia, two were from the United Arab Emirates, one was from Egypt, and one was from Lebanon.[435]

    By midday, the U.S. National Security Agency and German intelligence agencies had intercepted communications pointing to Osama bin Laden.[436] Two of the hijackers were known to have traveled with a bin Laden associate to Malaysia in 2000[437] and hijacker Mohamed Atta had previously gone to Afghanistan.[438] He and others were part of a terrorist cell in Hamburg.[439] One of the members of the Hamburg cell in Germany was discovered to have been in communication with Khalid Sheikh Mohammed who was identified as a member of Al-Qaeda.[440]

    Authorities in the United States and the United Kingdom also obtained electronic intercepts, including telephone conversations and electronic bank transfers, which indicated that Mohammed Atef, a bin Laden deputy, was a key figure in the planning of the 9/11 attacks. Intercepts were also obtained that revealed conversations that took place days before September 11 between bin Laden and an associate in Pakistan. In those conversations, the two referred to "an incident that would take place in America on, or around, September 11" and they discussed potential repercussions. In another conversation with an associate in Afghanistan, bin Laden discussed the "scale and effects of a forthcoming operation". These conversations did not specifically mention the World Trade Center, the Pentagon, or other specifics.[441]



    Origins of the 19 hijackers
    Nationality
    Number
    Saudi Arabia
     
    15
    United Arab Emirates
     
    2
    Egypt
     
    1
    Lebanon
     
    1
    In their annual violent crime index for the year 2001, the FBI recorded the deaths from the attacks as murder, in separate tables so as not to mix them with other reported crimes for that year.[442] In a disclaimer, the FBI stated that "the number of deaths is so great that combining it with the traditional crime statistics will have an outlier effect that falsely skews all types of measurements in the program's analyses".[443] New York City also did not include the deaths in their annual crime statistics for 2001.[444]

    CIA
    Further information: September 11 intelligence before the attacks
    In 2004, John L. Helgerson, the Inspector General of the Central Intelligence Agency (CIA), conducted an internal review of the agency's pre-9/11 performance and was harshly critical of senior CIA officials for not doing everything possible to confront terrorism.[445] According to Philip Giraldi in The American Conservative, Helgerson criticized their failure to stop two of the 9/11 hijackers, Nawaf al-Hazmi and Khalid al-Mihdhar, as they entered the United States and their failure to share information on the two men with the FBI.[446]

    In May 2007, senators from both major U.S. political parties (the Republican and Democratic party) drafted legislation to make the review public. One of the backers, Senator Ron Wyden said, "The American people have a right to know what the Central Intelligence Agency was doing in those critical months before 9/11".[447] The report was released in 2009 by President Barack Obama.[445]

    Congressional inquiry
    Main article: Joint Inquiry into Intelligence Community Activities before and after the Terrorist Attacks of September 11, 2001
    In February 2002, the Senate Select Committee on Intelligence and the House Permanent Select Committee on Intelligence formed a joint inquiry into the performance of the U.S. Intelligence Community.[448] Their 832-page report released in December 2002[449] detailed failings of the FBI and CIA to use available information, including about terrorists the CIA knew were in the United States, to disrupt the plots.[450] The joint inquiry developed its information about possible involvement of Saudi Arabian government officials from non-classified sources.[451] Nevertheless, the Bush administration demanded 28 related pages remain classified.[450] In December 2002, the inquiry's chair Bob Graham (D-FL) revealed in an interview that there was "evidence that there were foreign governments involved in facilitating the activities of at least some of the terrorists in the United States".[452] September 11 victim families were frustrated by the unanswered questions and redacted material from the congressional inquiry and demanded an independent commission.[450] September 11 victim families,[453] members of Congress[454] and the Saudi Arabian government are still seeking the release of the documents.[455][456] In June 2016, CIA chief John Brennan said that he believes 28 redacted pages of a congressional inquiry into 9/11 will soon be made public, and that they will prove that the government of Saudi Arabia had no involvement in the September 11 attacks.[457]

    In September 2016, Congress passed the Justice Against Sponsors of Terrorism Act that would allow relatives of victims of the September 11 attacks to sue Saudi Arabia for its government's alleged role in the attacks.[458][459][460]

    9/11 Commission
    Main articles: 9/11 Commission and 9/11 Commission Report
    See also: Criticism of the 9/11 Commission
     The cover of the 9/11 Commission Report, a 585-page report released in 2004, on events leading up to the September 11 attacks and steps recommended to avoid a future terrorist attack
    The National Commission on Terrorist Attacks Upon the United States, popularly known as the 9/11 Commission, chaired by Thomas Kean, governor of New Jersey from 1982 to 1990,[m] was formed in late 2002 to prepare a thorough account of the circumstances surrounding the attacks, including preparedness for and the immediate response to the attacks.[465] On July 22, 2004, the commission issued the 9/11 Commission Report, a 585-page report based on its investigations and interviews. The report detailed the events leading up to the September 11 attacks, concluding that they were carried out by Al-Qaeda. The commission also examined how security and intelligence agencies were inadequately coordinated to prevent the attacks.

    According to the report, "We believe the 9/11 attacks revealed four kinds of failures: in imagination, policy, capabilities, and management".[466] The commission made numerous recommendations on how to prevent future attacks, and in 2011 was dismayed that several of its recommendations had yet to be implemented.[467]

    National Institute of Standards and Technology
    Main article: NIST World Trade Center Disaster Investigation
    See also: 7 World Trade Center § 9/11 and collapse
     The exterior support columns from the lower level of the South Tower remained standing after the building collapsed
    The U.S. National Institute of Standards and Technology (NIST) investigated the collapses of the Twin Towers and 7 WTC. The investigations examined why the buildings collapsed and what fire protection measures were in place, and evaluated how fire protection systems might be improved in future construction.[468] The investigation into the collapse of 1 WTC and 2 WTC was concluded in October 2005 and that of 7 WTC was completed in August 2008.[469]

    NIST found that the fireproofing on the Twin Towers' steel infrastructures was blown off by the initial impact of the planes and that had this not occurred, the towers likely would have remained standing.[470] A 2007 study of the north tower's collapse published by researchers of Purdue University determined that since the plane's impact had stripped off much of the structure's thermal insulation, the heat from a typical office fire would have softened and weakened the exposed girders and columns enough to initiate the collapse regardless of the number of columns cut or damaged by the impact.[471][472]

    The director of the original investigation stated that "the towers did amazingly well. The terrorist aircraft didn't bring the buildings down; it was the fire that followed. It was proven that you could take out two-thirds of the columns in a tower and the building would still stand".[473] The fires weakened the trusses supporting the floors, making the floors sag. The sagging floors pulled on the exterior steel columns causing the exterior columns to bow inward.

    With the damage to the core columns, the buckling exterior columns could no longer support the buildings, causing them to collapse. Additionally, the report found the towers' stairwells were not adequately reinforced to provide adequate emergency escape for people above the impact zones.[474] NIST concluded that uncontrolled fires in 7 WTC caused floor beams and girders to heat and subsequently "caused a critical support column to fail, initiating a fire-induced progressive collapse that brought the building down".[469]

    Alleged Saudi government role
    Main article: Alleged Saudi government role in the September 11 attacks
    See also: Saudi Arabia–United States relations, Saudi Arabia and state-sponsored terrorism, and The 28 pages
    In July 2016, the Obama administration released a document compiled by U.S. investigators Dana Lesemann and Michael Jacobson, known as "File 17",[475] which contains a list naming three dozen people, including the suspected Saudi intelligence officers attached to Saudi Arabia's embassy in Washington, D.C.,[476] which connects Saudi Arabia to the hijackers.[477][478]

    In September 2016, Congress passed the Justice Against Sponsors of Terrorism Act.[479][480] The practical effect of the legislation was to allow the continuation of a longstanding civil lawsuit brought by families of victims of the September 11 attacks against Saudi Arabia for its government's alleged role in the attacks.[481] In March 2018, a U.S. judge formally allowed a suit to move forward against the government of Saudi Arabia brought by 9/11 survivors and victims' families.[479]

    In 2022, the families of some 9/11 victims obtained two videos and a notepad seized from Saudi national Omar al-Bayoumi by the British courts. The first video showed him hosting a party in San Diego for Nawaf al-Hazmi and Khalid al-Mihdhar, the first two hijackers to arrive in the U.S. The other video showed al-Bayoumi greeting the cleric Anwar al-Awlaki, who was blamed for radicalizing Americans and later killed in a CIA drone strike. The notepad depicted a hand-drawn aeroplane and some mathematical equations that, according to a pilot's court statement, might have been used to calculate the rate of descent to get to a target. According to a 2017 FBI memo, from the late 1990s up until the 9/11 attack, al-Bayoumi was a paid cooptee of the Saudi General Intelligence Presidency. As of April 2022 he is believed to be living in Saudi Arabia, which has denied any involvement in 9/11.[482]

    Rebuilding and memorials
    Reconstruction
    Main articles: Rescue and recovery effort after the September 11 attacks on the World Trade Center and Construction of One World Trade Center
    Further information: World Trade Center (2001–present) and World Trade Center site
     The rebuilt World Trade Center, September 2020
    On the day of the attacks, New York City mayor Rudy Giuliani stated: "We will rebuild. We're going to come out of this stronger than before, politically stronger, economically stronger. The skyline will be made whole again".[483]

    Within hours of the attack, a substantial search and rescue operation was launched. After months of around-the-clock operations, the World Trade Center site was cleared by the end of May 2002.[484] The damaged section of the Pentagon was rebuilt and occupied within a year of the attacks.[485] The temporary World Trade Center PATH station opened in late 2003 and construction of the new 7 World Trade Center was completed in 2006. Work on rebuilding the main World Trade Center site was delayed until late 2006 when leaseholder Larry Silverstein and the Port Authority of New York and New Jersey agreed on financing.[486] The construction of One World Trade Center began on April 27, 2006, and reached its full height on May 20, 2013. The spire was installed atop the building at that date, putting One WTC's height at 1,776 feet (541 m) and thus claiming the title of the tallest building in the Western Hemisphere.[487][488] One WTC finished construction and opened on November 3, 2014.[488][489][490]

    On the World Trade Center site, three more office towers were to be built one block east of where the original towers stood.[491] 4 WTC, meanwhile, opened in November 2013, making it the second tower on the site to open behind 7 World Trade Center, as well as the first building on the Port Authority property.[492] 3 WTC opened on June 11, 2018, becoming the fourth skyscraper at the site to be completed.[493] In December 2022, the Nicholas Greek Orthodox Church fully reopened for regular services[494] followed by the opening of the Ronald O. Perelman Performing Arts Center in September 2023.[495] With construction beginning in 2008,[496] 2 World Trade Center remains as of 2023 unfinished.[497] Construction of a 5 World Trade Center is planned to begin in 2024 and be finished by 2029.[498][499]

    Christopher O. Ward, Port Authority of New York and New Jersey Executive Director from 2008 to 2011, is a survivor of the attacks and is credited with getting the construction of the 9/11 site back on track.[500]

    Memorials
    Main article: Memorials and services for the September 11 attacks
     The National September 11 Memorial and Museum in Lower Manhattan, August 2016
    In the days immediately following the attacks, many memorials and vigils were held around the world, and photographs of the dead and missing were posted around Ground Zero. A witness described being unable to "get away from faces of innocent victims who were killed. Their pictures are everywhere, on phone booths, street lights, and walls of subway stations. Everything reminded me of a huge funeral, people were quiet and sad, but also very nice. Before, New York gave me a cold feeling; now people were reaching out to help each other".[501] President Bush proclaimed Friday, September 14, 2001 as Patriot Day.[502]

     Tribute in Light, featuring two columns of light representing the Twin Towers, September 2020
    One of the first memorials was the Tribute in Light, an installation of 88 searchlights at the footprints of the World Trade Center towers.[503] In New York City, the World Trade Center Site Memorial Competition was held to design an appropriate memorial on the site.[504] The winning design, Reflecting Absence, was selected in August 2006, and consists of a pair of reflecting pools in the footprints of the towers, surrounded by a list of the victims' names in an underground memorial space.[505] The memorial was completed on September 11, 2011;[506] a museum also opened on site on May 21, 2014.[507]

    The Sphere by the German sculptor Fritz Koenig is the world's largest bronze sculpture of modern times, and stands between the Twin Towers on the Austin J. Tobin Plaza of the World Trade Center in New York City from 1971 until the terrorist attacks on September 11, 2001. The sculpture, weighing more than 20 tons, was the only remaining work of art to be recovered largely intact from the ruins of the collapsed Twin Towers after the attacks. Since then, the work of art, known in the U.S. as The Sphere, has been transformed into an important symbolic monument of 9/11 commemoration. After being dismantled and stored near a hangar at John F. Kennedy International Airport, the sculpture was the subject of the 2001 documentary The Sphere by filmmaker Percy Adlon. On August 16, 2017, the work was reinstated, installed at the Liberty Park, close to the new World Trade Center aerial and the 9/11 Memorial.[508]

     The National 9/11 Pentagon Memorial in Arlington County, Virginia, September 2008
    In Arlington County, the Pentagon Memorial was completed and opened to the public on the seventh anniversary of the attacks in 2008.[509][510] It consists of a landscaped park with 184 benches facing the Pentagon.[511] When the Pentagon was repaired in 2001–2002, a private chapel and indoor memorial were included, located at the spot where Flight 77 crashed into the building.[512]

    In Shanksville, a concrete-and-glass visitor center was opened on September 10, 2015,[513] situated on a hill overlooking the crash site and the white marble Wall of Names.[514] An observation platform at the visitor centre and the white marble wall are both aligned beneath the path of Flight 93.[514][515] A temporary memorial is located 500 yards (457 m) from the crash site.[516] New York City firefighters donated a cross made of steel from the World Trade Center and mounted on top of a platform shaped like the Pentagon.[517] It was installed outside the firehouse on August 25, 2008.[518] Many other permanent memorials are elsewhere. Scholarships and charities have been established by the victims' families and by many other organizations and private figures.[519]

    On every anniversary in New York City, the names of the victims who died there are read out against a background of sombre music. The President of the United States attends a memorial service at the Pentagon,[520] and asks Americans to observe Patriot Day with a moment of silence. Smaller services are held in Shanksville, Pennsylvania, which are usually attended by the First Lady. In September 2023, President Joe Biden did not attend services in the affected areas, instead marking the day in Anchorage, Alaska, the first US President to do so since the attacks.[521][522][523]

     
    See also
    9/11 Commission
    9/11 Commission Report
    Air France Flight 8969
    Bojinka plot
    Delta 1989 and Korean 085, two other flights that were falsely suspected of being hijacked as part of the September 11 attacks
    List of cultural references to the September 11 attacks
    Khobar Towers bombing
    List of attacks on U.S. territory
    List of aviation incidents involving terrorism
    List of deadliest terrorist attacks in the United States
    List of Islamist terrorist attacks
    List of major terrorist incidents
    List of terrorist incidents in 2001
    List of terrorist incidents in New York CityOutline of the September 11 attacks
    Timeline of al-Qaeda attacks
    Timeline of the September 11 attacks
    USS Cole bombing
    1993 World Trade Center bombing
    1998 United States embassy bombing
    2006 transatlantic aircraft plot
    2007 John F. Kennedy International Airport attack plot
    2009 Bronx terrorism plot
    2010 transatlantic aircraft bomb plot
    2023 Israel–Hamas war
    2004 Madrid train bombings
    References
    Notes
    ^ Other, secondary attack locations include the airspaces of Massachusetts, New Jersey, Ohio, Kentucky and West Virginia.
    ^ The hijackers began their first attack at around 08:13 a.m., when a group of five took control of American Airlines Flight 11, injuring two people and murdering one before forcing their way into the cockpit.
    ^ The fourth and final hijacked plane of the attacks crashed in a Pennsylvania field at 10:03 a.m., which concluded the attacks since all the attackers were now dead and all of the hijacked planes were destroyed. However, the attackers' damage continued as the North Tower kept burning for an additional 25 minutes until it ultimately collapsed by 10:28 a.m.
    ^ Sources vary regarding the number of injuries―some say 6,000[1] while others go as high as 25,000.[2]
    ^ The expression 9/11 is typically pronounced "nine eleven" in English, even including places that use the opposite numerical dating convention; the slash is not pronounced.
    ^ The exact time is disputed. The 9/11 Commission Report states that Flight 11 struck the North Tower at 08:46:40 a.m.,[3] NIST reports 08:46:30 a.m.,[4] and some other sources claim 08:46:26 a.m.[5]
    ^ Jump up to:a b c The exact time is disputed. The 9/11 Commission Report states that Flight 175 struck the South Tower at 09:03:11 a.m.,[6][7] NIST reports 09:02:59 a.m.,[8] and some other sources claim 09:03:02 a.m.[9] In any case, the 16-minute gap between each impact is rounded to 17.[10]
    ^ Jump up to:a b While NIST and the 9/11 Commission give differing accounts of the exact second of the North Tower's collapse initiation, with NIST placing it at 10:28:22 a.m.[11][12] and the commission at 10:28:25 a.m.,[13] it is generally accepted that Flight 11 did not strike the North Tower any sooner than 8:46:26 a.m.,[5] so the time it took for the North Tower to collapse was just shy of 102 minutes either way.
    ^ NIST and the 9/11 Commission both state that the collapse began at 9:58:59 a.m., which is rounded to 9:59[148]: 84 [147]: 322  for simplicity. If the commission's claim that the South Tower was struck at 9:03:11 is to be believed, then the collapse began 55 minutes and 48 seconds after the crash, not 56 minutes.
    ^ The exact time of the North Tower's collapse initiation is disputed, with NIST dubbing the moment it began to collapse as being 10:28:22 a.m.[149] and the 9/11 Commission recording the time as 10:28:25.[150]: 329 
    ^ The massacre at Camp Speicher―often described as the second deadliest act of terrorism in history after 9/11―is said to have killed between 1,095 and 1,700 people.[161] The upper estimate would tie it with the attack on the World Trade Center's North Tower, but until the true death toll of the massacre becomes known, then the hijacking and crash of Flight 11 was the deadliest act of terrorism on record.
    ^ President Barack Obama announced his death on May 1. At the time of the raid, it was early morning of May 2 in Pakistan and late afternoon of May 1 in the U.S.
    ^ Former Secretary of State Henry Kissinger was initially appointed to head the commission[461] but resigned only weeks after being appointed, to avoid conflicts of interest.[462] Former U.S. Senator George Mitchell was originally appointed as the vice chairman, but he stepped down on December 10, 2002, not wanting to sever ties to his law firm.[463] On December 15, 2002, Bush appointed former New Jersey Governor Tom Kean to head the commission.[464]
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    ^ National Institute of Standards and Technology (2005). "Final report on the collapse of the World Trade Center" (PDF). NIST: 69. Archived (PDF) from the original on July 7, 2021. Retrieved December 7, 2023.
    ^ Jump up to:a b "102 Minutes: Last Words at the Trade Center; Fighting to Live as the Towers Die". The New York Times. May 26, 2002. Archived from the original on September 12, 2009. Retrieved June 23, 2023.
    ^ Final Report of the 9/11 Commission on Terrorist Attacks Upon the United States (PDF) (Report). National Commission on Terrorist Attacks Upon the United States. July 22, 2004. pp. 7–8. Archived (PDF) from the original on August 16, 2021. Retrieved August 15, 2021.
    ^ Staff Report of the 9/11 Commission on Terrorist Attacks upon the United States (PDF) (Report). National Commission on Terrorist Attacks Upon the United States. September 2005 [August 26, 2004]. p. 24. Archived (PDF) from the original on July 12, 2014. Retrieved August 15, 2021.
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    ^ Jump up to:a b c d "Al Qaeda's Second Fatwa". PBS NewsHour. PBS. Archived from the original on November 28, 2013. Retrieved May 29, 2014.
    ^ Logevall, Fredrik (2002). Terrorism and 9/11: A Reader. New York: Houghton Mifflin Company. ISBN 0-618-25535-4.
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    ^ Miller, John. ""Greetings, America. My name is Osama Bin Laden..."". PBS. Archived from the original on February 11, 2001.
    ^ Jump up to:a b "Bin Laden claims responsibility for 9/11". CBC News. October 29, 2004. Archived from the original on February 18, 2010. Retrieved September 1, 2011. Al-Qaeda leader Osama bin Laden appeared in a new message aired on an Arabic TV station Friday night, for the first time claiming direct responsibility for the 2001 attacks against the United States.
    ^ "Pakistan inquiry orders Bin Laden family to remain". BBC News. July 6, 2011. Archived from the original on November 30, 2019. Retrieved September 3, 2011.
    ^ "Full transcript of bin Laden's speech". Al Jazeera. November 2, 2004. Archived from the original on June 13, 2007. Retrieved September 3, 2011.
    ^ "Pakistan to Demand Taliban Give Up Bin Laden as Iran Seals Afghan Border". Fox News. September 16, 2001. Archived from the original on May 23, 2010. Retrieved September 3, 2011.
    ^ "Bin Laden on tape: Attacks 'benefited Islam greatly'". CNN. December 14, 2001. Archived from the original on December 27, 2007. Retrieved November 24, 2013. Reveling in the details of the fatal attacks, bin Laden brags in Arabic that he knew about them beforehand and said the destruction went beyond his hopes. He says the attacks "benefited Islam greatly".
    ^ "Transcript: Bin Laden video excerpts". BBC News. December 27, 2001. Archived from the original on July 27, 2019. Retrieved September 3, 2011.
    ^ Bin Ladin, Osama (November 1, 2004). "Full transcript of bin Ladin's speech". Al Jazeera. Archived from the original on November 1, 2020. Retrieved June 3, 2023.
    ^ "Bin Laden Dead – Where Are Other 9/11 Planners?". ABC News. May 2, 2011. Archived from the original on May 4, 2011. Retrieved February 2, 2019. While initially denying responsibility for the 9/11 attacks, Bin Laden took responsibility for them in a 2004 taped statement, saying that he had personally directed the hijackers.
    ^ "Bin Laden claims responsibility for 9/11". CBC News. October 29, 2004. Archived from the original on February 18, 2010. Retrieved February 2, 2019.
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    ^ "We left out nuclear targets, for now". The Guardian. London. March 4, 2003. Archived from the original on January 23, 2008. Retrieved September 3, 2011. Yosri Fouda of the Arabic television channel al-Jazeera is the only journalist to have interviewed Khalid Sheikh Mohammed, the al-Qaeda military commander arrested at the weekend.
    ^ Leonard, Tom; Spillius, Alex (October 10, 2008). "Alleged 9/11 mastermind wants to confess to plot". The Daily Telegraph. London. Archived from the original on January 10, 2022. Retrieved September 3, 2011.
    ^ Jump up to:a b "September 11 suspect 'confesses'". Al Jazeera. March 15, 2007. Archived from the original on September 27, 2019. Retrieved September 3, 2011.
    ^ 9/11 Commission Report (2004), p. 147.
    ^ "White House power grabs". The Washington Times. August 26, 2009. Archived from the original on December 5, 2019. Retrieved September 3, 2011.
    ^ Van Voris, Bob; Hurtado, Patricia (April 4, 2011). "Khalid Sheikh Mohammed Terror Indictment Unsealed, Dismissed". Bloomberg BusinessWeek. Archived from the original on April 17, 2011. Retrieved September 3, 2011.
    ^ Wright 2006, p. [page needed].
    ^ "Substitution for Testimony of Khalid Sheikh Mohammed" (PDF). United States District Court for the Eastern District of Virginia. 2006. p. 24. Archived from the original (PDF) on October 26, 2019. Retrieved September 3, 2011.
    ^ "[Text of] Bin Laden's [1996] Fatwa". PBS NewsHour. Archived from the original on April 19, 2014. Retrieved June 14, 2014.
    ^ Gunarathna, pp. 61–62.
    ^ Bin Laden, Osama (2005). "Declaration of Jihad". In Lawrence, Bruce (ed.). Messages to the World: The Statements of Osama bin Laden. 6 Meard Street, London W1F OEG: Verso. pp. 139, 140, 141. ISBN 1-84467-045-7. The targets of September 11 were not women and children. The main targets were the symbol of the United States: their economic and military power.
    ^ "'Muslims have the right to attack America'". The Guardian. November 10, 2001. Archived from the original on August 25, 2013.
    ^ Jump up to:a b *"Full transcript of bin Ladin's speech". Al Jazeera. Archived from the original on January 1, 2016. Retrieved April 10, 2012.bin Laden, Osama (November 24, 2002). "Full text: bin Laden's 'letter to America'". The Observer. London. Archived from the original on July 28, 2013. Retrieved September 3, 2011.
    ^ Jump up to:a bMearsheimer (2007), p. 67.
    Kushner (2003), p. 389.
    Murdico (2003), p. 64.
    Kelley (2006), p. 207.
    Ibrahim (2007), p. 276.
    Berner (2007), p. 80
    ^ "Full text: bin Laden's 'letter to America'". The Guardian. November 24, 2002. Archived from the original on October 8, 2014. Retrieved January 7, 2019. The blood pouring out of Palestine must be equally revenged. You must know that the Palestinians do not cry alone; their women are not widowed alone; their sons are not orphaned alone... American people have chosen, consented to, and affirmed their support for the Israeli oppression of the Palestinians, the occupation and usurpation of their land, and its continuous killing, torture, punishment and expulsion of the Palestinians. The American people have the ability and choice to refuse the policies of their government and even to change them if they want. (b) The American people are the ones who pay the taxes that fund the planes that bomb us in Afghanistan, the tanks that strike and destroy our homes in Palestine, the armies that occupy our lands in the Arabian Gulf, and the fleets that ensure the blockade of Iraq.
    ^ Riedel, Bruce (2008). "1: The Manhattan Raid". The Search for Al Qaeda. Massachusetts Avenue, N.W., Washington, DC, US: Brookings Institution Press. pp. 5, 6. ISBN 978-0-8157-0451-5. The Palestinian intifada, the fierce uprising in the fall of 2000 on the West Bank and Gaza, was a particularly powerful motivating event for.. bin Laden... The intifada's power over bin Laden's thinking about the 9/11 raid is underscored by his repeated attempts to push KSM to advance the timing of the crashes. In September of 2000, he urged KSM to tell Atta to attack immediately to respond to the Sharon visit to the holy sites in Jerusalem; Atta told bin Laden he was not ready yet. When bin Laden learned that Sharon, who had become Israel's prime minister in March 2001, was going to visit the White House early that summer, he again pressed Atta to attack immediately. And again Atta demurred, arguing he needed more time to get the plan and the team ready to go.
    ^ Holbrook, Donald (2014). The Al-Qaeda Doctrine. New York, NY, US: Bloomsbury. p. 145. ISBN 978-1-62356-314-1.
    ^ J. Greenberg, Karen (2005). "October 21, 2001 – Interview with Tayseer Alouni". Al Qaeda Now. New York, US: Cambridge University Press. pp. 192–206. ISBN 978-0-521-85911-0. Last year's blessed intifada helped us to push more for the Palestinian issue. This push helps the other cause. Attacking America helps the cause of Palestine and vice versa. No conflict between the two; on the contrary, one serves the other.
    ^ *Plotz, David (2001) What Does Osama Bin Laden Want? Archived November 15, 2016, at the Wayback Machine, SlateBergen (2001), p. 3
    Yusufzai, Rahimullah (September 26, 2001). "Face to face with Osama". The Guardian. London. Archived from the original on January 19, 2008. Retrieved September 3, 2011.
    "US pulls out of Saudi Arabia". BBC News. April 29, 2003. Archived from the original on December 25, 2018. Retrieved September 3, 2011.
    "Saga of Dr. Zawahri Sheds Light on the Roots of al Qaeda Terror". The Wall Street Journal. July 2, 2002. Archived from the original on December 30, 2018. Retrieved September 3, 2011.
    "Tenth Public Hearing, Testimony of Louis Freeh". 9/11 Commission. April 13, 2004. Archived from the original on December 25, 2018. Retrieved September 3, 2011.
    "Jihad Against Jews and Crusaders: World Islamic Front Statement". Federation of American Scientists. February 23, 1998. Archived from the original on April 21, 2010. Retrieved September 3, 2011.
    ^ "Full text: bin Laden's 'letter to America'". The Guardian. London. November 24, 2002. Archived from the original on April 18, 2010. Retrieved April 26, 2010.
    ^ "Osama bin Laden's aide Ayman al-Zawahiri rants on global warming – Mirror.co.uk". Daily Mirror. Archived from the original on May 11, 2008. Retrieved May 14, 2023.
    ^ Kates, Brian (January 30, 2010). "Al Qaeda leader Osama Bin Laden blasts U.S. in audiotape spewing hate for... global warming". New York Daily News. Archived from the original on February 1, 2010. Retrieved December 7, 2023.
    ^ "Full transcript of bin Laden's 'Letter to America'". The Guardian. London. November 24, 2002. Archived from the original on April 26, 2019. Retrieved September 3, 2011.
    ^ bin Laden, Osama. "Full transcript of bin Ladin's speech". Al Jazeera. Archived from the original on January 1, 2016. Retrieved April 10, 2012. So I shall talk to you about the story behind those events and shall tell you truthfully about the moments in which the decision was taken, for you to consider
    ^ Bruce Lawrence, ed. (2005). Messages to the World: The Statements of Osama bin Laden. 6 Meard Street, London W1F OEG: Verso. p. 119. ISBN 1-84467-045-7.
    ^ Bergen, Peter L. (2005). Holy War, Inc.: Inside the Secret World of Osama Bin Laden. New York: Simon and Schuster. ISBN 978-0-7432-3467-2. Retrieved March 20, 2020.
    ^ Jump up to:a b "1998 Al Qaeda fatwā". Federation of American Scientists (FAS). February 23, 1998. Archived from the original on April 21, 2010. Retrieved September 3, 2011.
    ^ Jump up to:a b Yusufzai, Rahimullah (September 26, 2001). "Face to face with Osama". The Guardian. London. Archived from the original on January 19, 2008. Retrieved September 3, 2011.
    ^ Pape, Robert A. (2005). Dying to Win: The Strategic Logic of Suicide Terrorism. New York: Random House. ISBN 978-0-8129-7338-9. Retrieved March 20, 2020.
    ^ See also the 1998 Al-Qaeda fatwā: "The ruling to kill the Americans and their allies – civilians and military – is an individual duty for every Muslim who can do it in any country in which it is possible to do it, in order to liberate the al-Aqsa Mosque and the holy mosque [Mecca] from their grip, and in order for their armies to move out of all the lands of Islam, defeated and unable to threaten any Muslim." Quoted from "Al Qaeda's Second Fatwa". PBS NewsHour. PBS. Archived from the original on November 28, 2013. Retrieved May 29, 2014.
    ^ Summers and Swan (2011), pp. 211, 506n.
    ^ Lawrence (2005), p. 239.
    ^ "Full transcript of bin Ladin's speech". Al Jazeera. November 4, 2004. Archived from the original on November 14, 2016. Retrieved August 24, 2016.
    ^ In his taped broadcast from January 2010, bin Laden said "Our attacks against you [the United States] will continue as long as U.S. support for Israel continues. ... The message sent to you with the attempt by the hero Nigerian Umar Farouk Abdulmutallab is a confirmation of our previous message conveyed by the heroes of September 11". Quoted from "Bin Laden: Attacks on U.S. to go on as long as it supports Israel" Archived December 16, 2016, at the Wayback Machine, in Haaretz.com
    ^ Bernard Lewis, 2004. In Bernard Lewis's 2004 book The Crisis of Islam: Holy War and Unholy Terror, he argues that animosity toward the West is best understood with the decline of the once powerful Ottoman empire, compounded by the import of western ideas – Arab socialism, Arab liberalism and Arab secularism
    ^ In "The spirit of terrorism", Jean Baudrillard described 9/11 as the first global event that "questions the very process of globalization". Baudrillard. "The spirit of terrorism". Archived from the original on May 28, 2010. Retrieved June 26, 2011.
    ^ In an essay entitled "Somebody Else's Civil War", Michael Scott Doran argues the attacks are best understood as part of a religious conflict within the Muslim world and that bin Laden's followers "consider themselves an island of true believers surrounded by a sea of iniquity". Hoping that U.S. retaliation would unite the faithful against the West, bin Laden sought to spark revolutions in Arab nations and elsewhere. Doran argues the Osama bin Laden videos attempt to provoke a visceral reaction in the Middle East and ensure that Muslim citizens would react as violently as possible to an increase in U.S. involvement in their region. (Doran, Michael Scott. "Somebody Else's Civil War". Foreign Affairs. No. January/February 2002. Archived from the original on April 23, 2015. Retrieved December 5, 2009. Reprinted in Hoge, James F.; Rose, Gideon (2005). Understanding the War on Terror. New York: Norton. pp. 72–75. ISBN 978-0-87609-347-4.)
    ^ In The Osama bin Laden I Know, Peter Bergen argues the attacks were part of a plan to cause the United States to increase its military and cultural presence in the Middle East, thereby forcing Muslims to confront the idea of a non-Muslim government and to eventually establish conservative Islamic governments in the region.(Bergen (2006), p. 229)
    ^ Lahoud, Nelly (2022). The Bin Laden Papers: How the Abbottabad Raid Revealed the Truth about al-Qaeda, Its Leader and His Family. New Haven (CT): Yale University Press. pp. 16–19, 307. ISBN 978-0-300-26063-2.
    "The Birth of the Idea of September 11" (in Arabic). Central Intelligence Agency. September 2002. Archived from the original on April 15, 2022. Retrieved April 15, 2022.
    ^ "Suspect 'reveals 9/11 planning'". BBC News. September 22, 2003. Archived from the original on December 25, 2018. Retrieved September 3, 2011.
    ^ Jump up to:a b 9/11 Commission Report (2004), Chapter 5, pp. ??[page needed]
    ^ 9/11 Commission Report (2004), p. 67.
    ^ 9/11 Commission Report (2004), p. 149.
    ^ 9/11 Commission Report (2004), p. 155.
    ^ Lichtblau, Eric (March 20, 2003). "Bin Laden Chose 9/11 Targets, Al Qaeda Leader Says". The New York Times. Archived from the original on August 30, 2019. Retrieved September 3, 2011.
    ^ Wright (2006), p. 308.
    ^ Bergen (2006), p. 283.
    ^ Wright (2006), pp. 309–15.
    ^ McDermott (2005), pp. 191–92.
    ^ Bernstein, Richard (September 10, 2002). "On Path to the U.S. Skies, Plot Leader Met bin Laden". The New York Times. Archived from the original on May 12, 2011. Retrieved September 3, 2011.
    ^ Wright (2006), pp. 304–07.
    ^ Wright (2006), p. 302.
    ^ Jessee (2006), p. 371.
    ^ Jump up to:a b c d e f "9/11 commission staff statement No. 16" (PDF). 9/11 Commission. June 16, 2004. Archived (PDF) from the original on March 20, 2020. Retrieved September 11, 2012.
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    ^ Irujo, Jose María (March 21, 2004). "Atta recibió en Tarragona joyas para que los miembros del 'comando' del 11-S se hiciesen pasar por ricos saudíes". El País (in Spanish). Retrieved April 10, 2012.
    ^ "Entry of the 9/11 Hijackers into the United States Staff Statement No. 1" (PDF). National Commission on Terrorist Attacks Upon The United States. p. 2. Archived (PDF) from the original on April 14, 2020. Retrieved February 7, 2017.
    ^ Hudson, John (May 3, 2013). "How jihadists schedule terrorist attacks". Foreign Policy. Archived from the original on April 4, 2020. Retrieved February 9, 2020.
    ^ Wright (2006), pp. 310–12.
    ^ Clarke (2004), pp. 235–36.
    ^ Wright (2006), p. 344.
    ^ Clarke (2004), pp. 236–37.
    ^ Clarke (2004), pp. 242–43.
    ^ Kean, Thomas; Hamilton, Lee (2004). 9/11 Commission Report (Official Government ed.). Washington D.C, US. p. 251. ISBN 0-16-072304-3.
    ^ Wright (2006), p. 340.
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    ^ Wright (2006), pp. 352–53.
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    ^ Wright (2006), pp. 342–43.
    ^ Javorsek II et al. (2015), p. 742.
    ^ Clarke (2004), p. 238.
    ^ Jump up to:a b c The 9/11 Commission Report, pp. 4–14.
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    ^ 9/11 Commission 2004a, pp. 7–8.
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    ^ Sayej, Nadja (October 27, 2022). "The Latest Developments on 2 World Trade". Lev. Retrieved September 27, 2023.
    ^ Rizzi, Nicholas (February 11, 2021). "Silverstein, Brookfield Win Bid to Build Tower at 5 World Trade Center". Commercial Observer. Archived from the original on February 13, 2021. Retrieved February 14, 2021.
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    ^ Sigmund, Pete. "Crews Assist Rescuers in Massive WTC Search". Construction Equipment Guide. Retrieved September 4, 2011.
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    ^ Miroff, Nick (September 11, 2008). "Creating a Place Like No Other". The Washington Post. Retrieved September 4, 2011.
    ^ Miroff, Nick (September 12, 2008). "A Long-Awaited Opening, Bringing Closure to Many". The Washington Post. Retrieved September 4, 2011.
    ^ Dwyer, Timothy (May 26, 2007). "Pentagon Memorial Progress Is Step Forward for Families". The Washington Post. Retrieved September 4, 2011.
    ^ "DefenseLINK News Photos – Pentagon's America's Heroes Memorial". Department of Defense. Archived from the original on November 30, 2009. Retrieved September 4, 2011.
    ^ "Flight 93 National Memorial – Sources and Detailed Information". National Park Service. n.d. Retrieved January 31, 2017. 13. When will the Memorial be finished?
    ^ Jump up to:a b "Flight 93 National Memorial – Frequently Asked Questions (FAQs)" (PDF). National Park Service. May 2013. pp. 22–23. Retrieved January 31, 2017.
    ^ "A Long Road to a Place of Peace for Flight 93 Families". The New York Times. September 9, 2015. Retrieved September 9, 2015.
    ^ "Flight 93 Memorial Project". Flight 93 Memorial Project / National Park Service. Archived from the original on April 11, 2008. Retrieved September 4, 2011.
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    ^ Gaskell, Stephanie (August 25, 2008). "Pa. site of 9/11 crash gets WTC beam". New York Daily News. Retrieved September 4, 2011.
    ^ Fessenden, Ford (November 18, 2002). "9/11; After the World Gave: Where $2 Billion in Kindness Ended Up". The New York Times. Retrieved September 4, 2011.
    ^ Newman, Andy (September 11, 2010). "At a Memorial Ceremony, Loss and Tension". The New York Times.
    ^ "Biden will observe 9/11 in Alaska instead of the traditional NYC, Virginia or Pennsylvania events". AP News. August 28, 2023. Retrieved September 23, 2023.
    ^ Judd, Donald (September 11, 2023). "Biden marks 9/11 in Alaska, calls on Americans 'to protect our democracy' | CNN Politics". CNN. Retrieved September 23, 2023.
    ^ Hutzler, Alexandra (September 11, 2023). "Biden criticized for marking 9/11 anniversary in Alaska". ABC News. Retrieved September 23, 2023.
    Bibliography
    "Chapter 1.1: 'We Have Some Planes': Inside the Four Flights" (PDF). 9/11 Commission Report (Report). National Commission on Terrorist Attacks Upon the United States. 2004. Retrieved March 18, 2016.
    Alavosius, Mark P.; Rodriquez, Nischal J. (2005). "Unity of Purpose/Unity of effort: Private-Sector Preparedness in Times of Terror". Disaster Prevention & Management. 14 (5): 666. Bibcode:2005DisPM..14..666A. doi:10.1108/09653560510634098.
    "American Airlines Flight 77 FDR Report" (PDF). National Transportation Safety Board. January 31, 2002. Retrieved September 3, 2011.
    Averill, Jason D. (2005). Final Reports of the Federal Building and Fire Investigation of the World Trade Center Disaster (PDF) (Report). National Institute of Standards and Technology (NIST). Archived from the original (PDF) on May 9, 2009. Retrieved September 2, 2011.
    Bergen, Peter L. (2001). Holy War, Inc.: Inside the Secret World of Osama Bin Laden. Simon and Schuster. ISBN 978-0-7432-3467-2. Retrieved March 18, 2016.
    Bergen, Peter (2006). The Osama Bin Laden I Know: An Oral History of Al Qaeda's Leader. Simon and Schuster. ISBN 978-0-7432-9592-5. Retrieved March 18, 2016.
    Berner, Brad (2007). The World According to Al Qaeda. Peacock Books. ISBN 978-81-248-0114-7. Retrieved March 18, 2016.
    Bodnar, John.. Divided by Terror: American Patriotism after 9/11 (University of North Carolina Press, 2021) how memory of the event stimulated and reshaped patriotism.
    Clarke, Richard (2004). Against All Enemies: Inside America's War on Terror. New York: Free Press. ISBN 978-0-7432-6024-4.
    Dwyer, Jim; Flynn, Kevin (2005). 102 Minutes. Times Books. ISBN 978-0-8050-7682-0. Retrieved March 18, 2016.
    Final Report on the Collapse of World Trade Center Building 7 (PDF) (Report). National Institute of Standards and Technology. November 2008. Retrieved April 11, 2012.
    "Flight Path Study – American Airlines Flight 77" (PDF). National Transportation Safety Board. February 19, 2002. Retrieved September 3, 2011.
    Fouda, Yosri; Fielding, Nick (2004). Masterminds of Terror: The Truth Behind the Most Devastating Terrorist Attack the World Has Ever Seen. Arcade Publishing. ISBN 978-1-55970-717-6. Retrieved March 18, 2016.
    Goldberg, Alfred; et al. (2007). Pentagon 9/11. Washington, D.C.: Government Printing Office. ISBN 978-0-16-078328-9. Retrieved March 18, 2016.
    Graff, Garrett M. (2019). The Only Plane in the Sky: An Oral History of 9/11. New York: Avid Reader Press. ISBN 978-1-5011-8220-4.
    Gunaratna, Ronan (2002). Inside Al Qaeda: global network of terror. Columbia University Press. ISBN 978-0-231-12692-2.
    Holmes, Stephen (2006). "Al Qaeda, September 11, 2001". In Diego Gambetta (ed.). Making sense of suicide missions. Oxford University Press. ISBN 978-0-19-929797-9. Retrieved March 18, 2016.
    Ibrahim, Raymond; bin Laden, Osama (2007). The Al Qaeda reader. Random House Digital, Inc. ISBN 978-0-385-51655-6. Retrieved March 18, 2016.
    Javorsek II, Daniel; Rose, John; Marshall, Christopher; Leitner, Peter (August 5, 2015). "A Formal Risk-Effectiveness Analysis Proposal for the Compartmentalized Intelligence Security Structure". International Journal of Intelligence and CounterIntelligence. 28 (4): 734–61. doi:10.1080/08850607.2015.1051830. S2CID 152911592.
    Jessee, Devin (2006). "Tactical Means, Strategic Ends: Al Qaeda's Use of Denial and Deception" (PDF). International Journal of Intelligence and CounterIntelligence. 18 (3): 367–88. doi:10.1080/09546550600751941. S2CID 144349098. Archived from the original (PDF) on November 21, 2021. Retrieved March 23, 2016.
    Kelley, Christopher (2006). Executing the Constitution: putting the president back into the Constitution. SUNY Press. ISBN 978-0-7914-6727-5. Retrieved March 18, 2016.
    Keppel, Gilles; Milelli, Jean-Pierre; Ghazaleh, Pascale (2008). Al Qaeda in its own words. Harvard University Press. ISBN 978-0-674-02804-3. Retrieved March 18, 2016.
    Lawrence, Bruce (2005). Messages to the world: the statements of Osama Bin Laden. Verso. ISBN 978-1-84467-045-1. Retrieved May 29, 2014.
    Martin, Gus (2011). The SAGE Encyclopedia of Terrorism, Second Edition. Sage. ISBN 978-1-4129-8017-3. Retrieved March 18, 2016.
    McDermott, Terry (2005). Perfect Soldiers: The 9/11 Hijackers. HarperCollins. pp. 191–92. ISBN 978-0-06-058470-2.
    "McKinsey Report". FDNY / McKinsey & Company. August 9, 2002. Archived from the original on June 3, 2010. Retrieved September 25, 2011.
    Mearsheimer, John J. (2007). The Israel Lobby and U.S. Foreign Policy. Macmillan. ISBN 978-0-374-17772-0.
    Murdico, Suzanne (2003). Osama Bin Laden. Rosen Publishing Group. ISBN 978-0-8239-4467-5.
    "The Pentagon Building Performance Report" (PDF). American Society of Civil Engineers (ASCE). January 2003. Archived from the original (PDF) on July 21, 2011. Retrieved September 3, 2011.
    Summers, Anthony; Swan, Robbyn (2011). The Eleventh Day: The Full Story of 9/11 and Osama Bin Laden. New York: Ballantine Books. ISBN 978-1-4000-6659-9. Retrieved March 18, 2016.
    Sunder, Shyam S. (2005). Final Report on the Collapse of the World Trade Center Towers. National Institute of Standards and Technology (NIST). Retrieved September 2, 2011.
    "World Trade Center Building Performance Study – Bankers Trust Building" (PDF). Federal Emergency Management Agency. May 2002. Retrieved July 12, 2007.
    "World Trade Center Building Performance Study – Peripheral Buildings" (PDF). Federal Emergency Management Agency. May 2002. Retrieved September 3, 2011.
    "World Trade Center Building Performance Study" (PDF). Federal Emergency Management Agency. 2002. Retrieved September 2, 2011.
    Wright, Lawrence (2006). The Looming Tower: Al-Qaeda and the Road to 9/11. New York: Alfred A. Knopf. ISBN 978-0-375-41486-2. OCLC 64592193.
    Yitzhak, Ronen (Summer 2016). "The War Against Terrorism and For Stability of the Hashemite Regime: Jordanian Intelligence Challenges in the 21st Century". International Journal of Intelligence and CounterIntelligence. 29 (2): 213–35. doi:10.1080/08850607.2016.1121038. S2CID 155138286.
    Further reading
    The 9/11 Commission Report: Final Report of the National Commission on Terrorist Attacks Upon the United States. National Commission on Terrorist Attacks. July 30, 2010. ISBN 978-1-61640-219-8.
    Atkins, Stephen E (2011). The 9/11 Encyclopedia. ABC-CLIO. ISBN 978-1-59884-921-9.
    Bolton, M. Kent (2006). U.S. National Security and Foreign Policymaking After 9/11: Present at the Re-creation. Rowman & Littlefield. ISBN 978-0-7425-5900-4.
    Caraley, Demetrios (2002). September 11, terrorist attacks, and U.S. foreign policy. Academy of Political Science. ISBN 978-1-884853-01-2.
    Chernick, Howard (2005). Resilient city: the economic impact of 9/11. Russell Sage Foundation. ISBN 978-0-87154-170-3.
    Damico, Amy M; Quay, Sara E. (2010). September 11 in Popular Culture: A Guide. Greenwood. ISBN 978-0-313-35505-9.
    Hampton, Wilborn (2003). September 11, 2001: attack on New York City. Candlewick Press. ISBN 978-0-7636-1949-7.
    Langley, Andrew (2006). September 11: Attack on America. Compass Point Books. ISBN 978-0-7565-1620-8.
    Neria, Yuval; Gross, Raz; Marshall, Randall D.; Susser, Ezra S. (2006). 9/11: mental health in the wake of terrorist attacks. Cambridge University Press. ISBN 978-0-521-83191-8.
    Ryan, Allan A. (2015). The 9/11 Terror Cases: Constitutional Challenges in the War against Al Qaeda. University Press of Kansas. ISBN 978-0-7006-2132-3.
    Strasser, Steven; Whitney, Craig R; United States. Congress. Senate. Select Committee on Intelligence, National Commission on Terrorist Attacks upon the United States (2004). The 9/11 investigations: staff reports of the 9/11 Commission: excerpts from the House-Senate joint inquiry report on 9/11: testimony from fourteen key witnesses, including Richard Clarke, George Tenet, and Condoleezza Rice. PublicAffairs. ISBN 978-1-58648-279-4.
    External links
    September 11 attacksat Wikipedia's sister projects
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    National Commission on Terrorist Attacks Upon the United States official commission website
    List of victims
    September 11, 2001, Documentary Project from the U.S. Library of Congress, Memory.loc.gov
    September 11, 2001, Web Archive from the U.S. Library of Congress, Minerva
    National Security Archive
    September 11 Digital Archive: Saving the Histories of September 11, 2001, from the Center for History and New Media and the American Social History Project/Center for Media and Learning
    DoD: Khalid Sheikh Mohammed Verbatim Transcript of Combatant Status Review Tribunal Hearing for ISN 10024, from Wikisource
    The 9/11 Legacies Project, Oriental Institute, Czech Academy of Sciences, Prague
    9/11 at 20: A Week of Reflection, Responsible Statecraft, The Quincy Institute
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    From Wikipedia, the free encyclopedia

    For other events on the same date, see September 11 attacks (disambiguation).
    "9/11" redirects here. For the calendar dates, see September 11 and November 9. For the reverse, see 11/9 (disambiguation).
    September 11 attacks
    Part of terrorism in the United States
     
    United Airlines Flight 175 hits the South Tower
     
    Flight 77 hits The Pentagon
     
    Fuselage of Flight 93 in Stonycreek Township
     
    View of the collapsing North Tower
     
    Collapse of the 7 WTC
     
    World Trade Center site after the attacks
     
    The Pentagon building on fire
    Location
    Lower Manhattan, New York
    Arlington County, Virginia
    Stonycreek Township, Pennsylvania
    [a]
    Date
    September 11, 2001; 22 years ago
    c. 08:13 a.m.[b] – 10:03 a.m.[c] (EDT)
    Target
    North Tower
    (AA 11)
    South Tower
    (UA 175)
    The Pentagon
    (AA 77)
    U.S. Capitol Building or the White House
    (UA 93; unsuccessful due to passenger revolt)
    Attack type
    Islamic terrorism, aircraft hijacking, suicide attack, mass murder
    Deaths
    2,996
    (2,977 victims + 19 Al-Qaeda terrorists)
    Injured
    6,000–25,000+[d]
    Perpetrators
    Al-Qaeda led by Osama bin Laden (see also: responsibility)
    No. of participants
    19
    Motive
    Several; see Motives for the September 11 attacks and Fatawā of Osama bin Laden
    Convicted
    Zacarias Moussaoui
    Imad Yarkas
    Mounir el-Motassadeq (see also: Trials related to the September 11 attacks)
    September 11 attacks
     
    showTimeline
    showVictims
    showHijacked airliners
    showCrash sites
    showAftermath
    showResponse
    showPerpetrators
    showInquiries
    showCultural effects
    showMiscellaneous
    v
    t
    e
     
    showv
    t
    e
    al-Qaeda attacks
    The September 11 attacks, commonly known as 9/11,[e] were four coordinated Islamist suicide terrorist attacks carried out by Al-Qaeda against the United States on September 11, 2001. That morning, 19 terrorists hijacked four commercial airliners scheduled to travel from the East Coast to California. The hijackers crashed the first two planes into the Twin Towers of the World Trade Center in New York City, two of the world's five tallest buildings at the time, and aimed the next two flights toward targets in or near Washington, D.C., in an attack on the nation's capital. The third team succeeded in striking the Pentagon, the headquarters of the U.S. Department of Defense in Arlington County, Virginia, while the fourth plane crashed in rural Pennsylvania during a passenger revolt. The September 11 attacks killed 2,977 people, making them the deadliest terrorist attack in history, and instigated the multi-decade global war on terror, fought in Afghanistan, Iraq, and elsewhere.

    The first impact was that of American Airlines Flight 11, which ringleader Mohamed Atta flew into the North Tower of the World Trade Center complex in Lower Manhattan at 8:46 a.m.[f] Seventeen minutes later, at 9:03,[g] the World Trade Center's South Tower was hit by United Airlines Flight 175. Both 110-story skyscrapers collapsed within an hour and forty-one minutes,[h] bringing about the destruction of the remaining five structures in the WTC complex and damaging or destroying nearby buildings. A third flight, American Airlines Flight 77, crashed into the Pentagon at 9:37 a.m., causing a partial collapse. The fourth and final flight, United Airlines Flight 93, flew in the direction of the capital. Alerted to the previous attacks, the passengers fought for control, forcing the hijackers to nosedive the plane into a Stonycreek Township field, near Shanksville, at 10:03 a.m. Investigators determined that Flight 93's target was either the United States Capitol or the White House.

    That evening, the Central Intelligence Agency informed President George W. Bush that its Counterterrorism Center had identified the attacks as having been the work of Al-Qaeda under Osama bin Laden's leadership. The United States formally responded by launching the war on terror and invading Afghanistan to depose the Taliban, which rejected the conditions of U.S. terms to expel Al-Qaeda from Afghanistan and extradite its leaders. The U.S.'s invocation of Article 5 of the North Atlantic Treaty—its only usage to date—called upon allies to fight Al-Qaeda. As U.S. and NATO invasion forces swept through Afghanistan, bin Laden eluded them by disappearing into the White Mountains. He denied any involvement until 2004, when excerpts of a taped statement in which he accepted responsibility for the attacks were released. Al-Qaeda's cited motivations included U.S. support of Israel, the presence of U.S. military bases in Saudi Arabia and sanctions against Iraq. The nearly decade-long manhunt for bin Laden concluded on May 2, 2011, when he was killed during a U.S. military raid after being tracked down to his compound in Abbottabad, Pakistan. The war in Afghanistan continued for another eight years until the agreement was made in February 2020 for American and NATO troops to withdraw from the country, and the last members of the U.S. armed forces left the region on August 30, 2021, after which the Taliban returned to power. Ayman al-Zawahiri, another planner of the attacks who succeeded bin Laden as leader of Al-Qaeda, was killed by U.S. drone strikes in Kabul, Afghanistan on July 31, 2022.[14]

    Excluding the hijackers, the attacks killed 2,977 people, injured thousands more and gave rise to substantial long-term health consequences while also causing at least $10 billion in infrastructure and property damage. It remains the deadliest terrorist attack in history as well as the deadliest incident for firefighters and law enforcement personnel in US history, killing 343 and 72 members, respectively. The loss of life stemming from the impact of Flight 11 secured its place as the most lethal plane crash in aviation history followed by the death toll incurred by Flight 175. The destruction of the World Trade Center and its environs seriously harmed the U.S. economy and induced global market shocks. Many other countries strengthened anti-terrorism legislation and expanded their powers of law enforcement and intelligence agencies. Cleanup of the World Trade Center site (colloquially "Ground Zero") took eight months and was completed in May 2002, while the Pentagon was repaired within a year. After delays in the design of a replacement complex, construction of the One World Trade Center began in November 2006; it opened in November 2014. Memorials to the attacks include the National September 11 Memorial & Museum in New York City, The Pentagon Memorial in Arlington County, Virginia, and the Flight 93 National Memorial at the Pennsylvania crash site.

    Background
    Further information: Fatawā of Osama bin Laden and Political views of Osama bin Laden
    Al-Qaeda
    Main article: Al-Qaeda
    Further information: Jihad
    Al-Qaeda's origins can be traced to 1979, when the Soviet Union invaded Afghanistan.[15] Soon after the invasion, Osama bin Laden traveled to Afghanistan and helped organize Arab mujahideen (the "Afghan Arabs") to resist the "Communist invaders" (Soviets) until their exit from the country in 1989.[16][17] In 1984, bin Laden, along with Islamic scholar Abdullah Azzam, formed the Maktab al-Khidamat (MAK), an organization to support Arab mujahideen who came to join the jihad in Afghanistan.[15][18]

    The U.S. Central Intelligence Agency (CIA) funnelled several billion dollars worth of weapons to the indigenous Afghan mujahideen resistance, a portion of which bled to the Arab volunteers.[19] However, no direct evidence of U.S. aid to bin Laden or any of his affiliates was ever uncovered.[20]

    In 1996, bin Laden issued his first fatwā, which declared war against the United States and demanded the expulsion of all American soldiers from the Arabian Peninsula.[21] In a second 1998 fatwā, bin Laden outlined his objections to American foreign policy with respect to the State of Israel, as well as the continued presence of American troops in Saudi Arabia after the Gulf War.[22] Bin Laden maintained that Muslims are obliged to attack American targets until the aggressive policies of the U.S. against Muslims were reversed. According to bin Laden, Islamic jurists had "throughout Islamic history unanimously agreed that the jihad is an individual duty if the enemy destroys the Muslim countries".[22][23]

    The Hamburg cell in Germany included Islamists who eventually came to be key operatives in the 9/11 attacks.[24] Mohamed Atta; Marwan al-Shehhi; Ziad Jarrah; Ramzi bin al-Shibh; and Said Bahaji were all members of Al-Qaeda's Hamburg cell.[25] Bin Laden asserted that all Muslims must wage a defensive war against the United States, and combat American aggression. He further argued that military strikes against American assets would send a message to the American people, attempting to force the U.S. to re-evaluate its support to Israel, and other aggressive policies.[26] In a 1998 interview with American journalist John Miller, bin Laden stated:

    [W]e tell the Americans as people and we tell the mothers of soldiers and American mothers in general that if they value their lives and the lives of their children, to find a nationalistic government that will look after their interests and not the interests of the Jews. The continuation of tyranny will bring the fight to America, as [the 1993 World Trade Center bomber] Ramzi [Yousef] yourself and others did. This is my message to the American people: to look for a serious government that looks out for their interests and does not attack others, their lands, or their honour. My word to American journalists is not to ask why we did that but to ask what their government has done that forced us to defend ourselves.

    — Osama bin Laden, in his interview with John Miller, May 1998, [27]
    Osama bin Laden
    Main article: Osama bin Laden
    Further information: Militant career of Osama bin Laden
     Osama bin Laden in 1997–1998
    Bin Laden orchestrated the September 11 attacks. He initially denied involvement, but later recanted his denial.[28][29][30] Al Jazeera broadcast a statement by him on September 16, 2001: "I stress that I have not carried out this act, which appears to have been carried out by individuals with their own motivation".[31] In November 2001, U.S. forces recovered a videotape from a destroyed house in Jalalabad, Afghanistan. In the video, bin Laden, talking to Khaled al-Harbi, admitted foreknowledge of the attacks.[32] On December 27, 2001, a second video of bin Laden was released in which he, stopping short of admitting responsibility for the attacks, said:[33]

    It has become clear that the West in general and America in particular have an unspeakable hatred for Islam. ... It is the hatred of crusaders. Terrorism against America deserves to be praised because it was a response to injustice, aimed at forcing America to stop its support for Israel, which kills our people. ... We say that the end of the United States is imminent, whether Bin Laden or his followers are alive or dead, for the awakening of the Muslim ummah [nation] has occurred. ... It is important to hit the economy (of the United States), which is the base of its military power...If the economy is hit they will become reoccupied.

    — Osama bin Laden
    Shortly before the 2004 U.S. presidential election, bin Laden used a taped statement to publicly acknowledge Al-Qaeda's involvement in the attacks.[28] He admitted his direct link to the attacks and said they were carried out because:

    The events that affected my soul in a direct way started in 1982 when America permitted the Israelis to invade Lebanon and the American Sixth Fleet helped them in that. This bombardment began and many were killed and injured and others were terrorised and displaced.

    I couldn't forget those moving scenes, blood and severed limbs, women and children sprawled everywhere. Houses were destroyed along with their occupants high rises demolished over their residents, rockets raining down on our home without mercy...As I looked at those demolished towers in Lebanon, it entered my mind that we should punish the oppressor in kind and that we should destroy towers in America so that they taste some of what we tasted and so that they be deterred from killing our women and children.

    And that day, it was confirmed to me that oppression and the intentional killing of innocent women and children is a deliberate American policy. Destruction is freedom and democracy, while resistance is terrorism and intolerance.[34]
    Bin Laden personally directed his followers to attack the World Trade Center and the Pentagon.[35][36] Another video obtained by Al Jazeera in September 2006 showed bin Laden with one of the attacks' chief planners, Ramzi bin al-Shibh, as well as hijackers, Hamza al-Ghamdi and Wail al-Shehri, amidst making preparations for the attacks.[37] Bin Laden had been on the FBI's Most Wanted List since 1998 for the 1998 bombings of the U.S. embassies in Tanzania and Kenya.[38][39]

    Khalid Sheikh Mohammed and other Al-Qaeda members
    Main article: Khalid Sheikh Mohammed
     Khalid Sheikh Mohammed after his 2003 capture in Rawalpindi, Pakistan
    Journalist Yosri Fouda of the Arabic television channel Al Jazeera reported that in April 2002 Al-Qaeda member Khalid Sheikh Mohammed admitted his involvement in the attacks, along with Ramzi bin al-Shibh.[40][41][42] The 2004 9/11 Commission Report determined that Mohammed's animosity towards the United States, the principal architect of the 9/11 attacks, stemmed from his "violent disagreement with U.S. foreign policy favoring Israel".[43] Mohammed was also an adviser and financier of the 1993 World Trade Center bombing and the uncle of Ramzi Yousef, the lead bomber in that attack.[44][45] In late 1994, Mohammed and Yousef moved on to plan a new terrorist attack called the Bojinka plot planned for January 1995. Despite a failure and Yousef's capture by U.S. forces the following month, the Bojinka plot would influence the later 9/11 attacks.[46]

    In "Substitution for Testimony of Khalid Sheikh Mohammed" from the trial of Zacarias Moussaoui, five people are identified as having been completely aware of the operation's details. They are bin Laden; Khalid Sheikh Mohammed; Ramzi bin al-Shibh; Abu Turab al-Urduni; and Mohammed Atef.[47]

    Motives
    Main article: Motives for the September 11 attacks
    Further information: Fatwa of Osama bin Laden
    Osama bin Laden's declaration of a holy war against the United States, and a 1998 fatwā signed by bin Laden and others that called for the killing of Americans,[22][48] are seen by investigators as evidence of his motivation.[49] During his interview with Hamid Mir in November 2001, Bin Laden defended the September 11 attacks as retaliatory strikes against American atrocities against Muslims across the world. He also maintained that the attacks were not directed against women and children, asserting that the targets of the strikes were symbols of America's "economic and military power".[50][51]

    In bin Laden's November 2002 "Letter to the American people", he explicitly stated that al-Qaeda's motives for the attacks included:

    U.S. support of Israel[52][53]
    Bin Laden's strategy to support and globally expand the Al-Aqsa Intifada[54][55][56][57]
    Attacks against Muslims by U.S.-led coalition in Somalia
    U.S. support of the government of Philippines against Muslims in the Moro conflict
    U.S. support for the Israeli occupation of Southern Lebanon
    U.S. support of Russian atrocities against Muslims in Chechnya
    Pro-American governments in the Middle East (who "act as your agents") being against Muslim interests
    U.S. support of Indian oppression against Muslims in Kashmir
    The presence of U.S. troops in Saudi Arabia[58]
    The sanctions against Iraq[52]
    Environmental destruction[59][60][61]
    After the attacks, bin Laden and Ayman al-Zawahiri released additional videotapes and audio recordings, some of which repeated the above reasons for the attacks. Two relevant publications were bin Laden's 2002 "Letter to the American people"[62] and a 2004 videotape by bin Laden.[63]

    [...] those young men, for whom God has cleared the way, didn't set out to kill children, but rather attacked the biggest centre of military power in the world, the Pentagon, which contains more than 64,000 workers, a military base which has a big concentration of army and intelligence ... As for the World Trade Center, the ones who were attacked and who died in it were part of a financial power. It wasn't a children's school! Neither was it a residence. The consensus is that most of the people who were in the towers were men who backed the biggest financial force in the world, which spreads mischief throughout the world.
    — Osama Bin Laden's interview with Tayseer Allouni, 21 October 2001[64]
    As an adherent of Islam, bin Laden believed that non-Muslims are forbidden from having a permanent presence in the Arabian Peninsula.[65] In 1996, bin Laden issued a fatwā calling for American troops to leave Saudi Arabia. In 1998, Al-Qaeda wrote "For over seven years the United States has been occupying the lands of Islam in the holiest of places, the Arabian Peninsula, plundering its riches, dictating to its rulers, humiliating its people, terrorizing its neighbours, and turning its bases in the Peninsula into a spearhead through which to fight the neighbouring Muslim peoples".[66]

    In a December 1999 interview, bin Laden said he felt that Americans were "too near to Mecca", and considered this a provocation to the entire Muslim world.[67] One analysis of suicide terrorism suggested that without U.S. troops in Saudi Arabia, Al-Qaeda likely would not have been able to get people to commit to suicide missions.[68]

    In the 1998 fatwā, Al-Qaeda identified the Iraq sanctions as a reason to kill Americans, condemning the "protracted blockade" among other actions that constitute a declaration of war against "Allah, his messenger, and Muslims".[66] The fatwā declared that "the ruling to kill the Americans and their allies – civilians and military – is an individual duty for every Muslim who can do it in any country in which it is possible to do it, in order to liberate the al-Aqsa Mosque and the holy mosque of Mecca from their grip, and in order for their [the Americans'] armies to move out of all the lands of Islam, defeated and unable to threaten any Muslim".[22][69]

    In 2004, bin Laden claimed that the idea of destroying the towers had first occurred to him in 1982 when he witnessed Israel's bombardment of high-rise apartment buildings during the 1982 Lebanon War.[70][71] Some analysts, including political scientists John Mearsheimer and Stephen Walt, also claimed that U.S. support of Israel was a motive for the attacks.[53][67] In 2004 and 2010, bin Laden again connected the September 11 attacks with U.S. support of Israel, although most of the letters expressed bin Laden's disdain for President Bush and bin Laden's hope to "destroy and bankrupt" the U.S.[72][73]

    Other motives have been suggested in addition to those stated by bin Laden and Al-Qaeda. Some authors suggested the "humiliation" that resulted from the Islamic world falling behind the Western world – this discrepancy was rendered especially visible by globalization[74][75] and a desire to provoke the U.S. into a broader war against the Islamic world in the hope of motivating more allies to support Al-Qaeda. Similarly, others have argued the 9/11 attacks were a strategic move to provoke America into a war that would incite a pan-Islamic revolution.[76][77]

    Documents seized during the 2011 operation that killed bin Laden included a few notes handwritten by bin Laden in September 2002 with the heading "The Birth of the Idea of September 11". In these notes, he describes how he was inspired by the crash of EgyptAir Flight 990 on October 31, 1999, which was deliberately crashed by co-pilot Gameel Al-Batouti. "This is how the idea of 9/11 was conceived and developed in my head, and that is when we began the planning" bin Laden continued, adding that no one but Abu Hafs and Abu al-Khair knew about it at the time. The 9/11 Commission Report identified Khalid Sheikh Mohammed as the architect of 9/11, but he is not mentioned in bin Laden's notes.[78]

    Planning
    Main article: Planning of the September 11 attacks
     Map of the attacks on the World Trade Center
     Diagram of the World Trade Center attacks
    The attacks were conceived by Khalid Sheikh Mohammed, who first presented it to Osama bin Laden in 1996.[79] At that time, bin Laden and Al-Qaeda were in a period of transition, having just relocated back to Afghanistan from Sudan.[80] The 1998 African embassy bombings and bin Laden's February 1998 fatwā marked a turning point of Al-Qaeda's terrorist operation,[81] as bin Laden became intent on attacking the United States.

    In late 1998 or early 1999, bin Laden approved Mohammed to go forward with organizing the plot.[82] Mohammed, bin Laden, and Mohammed Atef, bin Laden's deputy, held a series of meetings in early 1999.[83] Atef provided operational support, including target selections and helping arrange travel for the hijackers.[80] Bin Laden overruled Mohammed, rejecting potential targets such as the U.S. Bank Tower in Los Angeles for lack of time.[84][85]

    Bin Laden provided leadership and financial support and was involved in selecting participants.[86] He initially selected Nawaf al-Hazmi and Khalid al-Mihdhar, both experienced jihadists who had fought in Bosnia. Hazmi and Mihdhar arrived in the United States in mid-January 2000. In early 2000, Hazmi and Mihdhar took flying lessons in San Diego, California. Both spoke little English, performed poorly in flying lessons, and eventually served as secondary "muscle" hijackers.[87][88]

    In late 1999, a group of men from Hamburg, Germany, arrived in Afghanistan. The group included Mohamed Atta, Marwan al-Shehhi, Ziad Jarrah, and Ramzi bin al-Shibh.[89] Bin Laden selected these men because they were educated, could speak English, and had experience living in the West.[90] New recruits were routinely screened for special skills and Al-Qaeda leaders consequently discovered that Hani Hanjour already had a commercial pilot's license.[91] Mohammed later said that he helped the hijackers blend in by teaching them how to order food in restaurants and dress in Western clothing.[92]

    Hanjour arrived in San Diego on December 8, 2000, joining Hazmi.[93]: 6–7  They soon left for Arizona, where Hanjour took refresher training.[93]: 7  Marwan al-Shehhi arrived at the end of May 2000, while Atta arrived on June 3, 2000, and Jarrah arrived on June 27, 2000.[93]: 6  Bin al-Shibh applied several times for a visa to the United States, but as a Yemeni, he was rejected out of concerns he would overstay his visa.[93]: 4, 14  Bin al-Shibh stayed in Hamburg, providing coordination between Atta and Mohammed.[93]: 16  The three Hamburg cell members all took pilot training in South Florida at Huffman Aviation.[93]: 6 

    In the spring of 2001, the secondary hijackers began arriving in the United States.[94] In July 2001, Atta met with bin al-Shibh in Tarragona, Catalonia, Spain, where they coordinated details of the plot, including final target selection. Bin al-Shibh also passed along bin Laden's wish for the attacks to be carried out as soon as possible.[95] Some of the hijackers received passports from corrupt Saudi officials who were family members or used fraudulent passports to gain entry.[96]

    There have been a few theories that 9/11 was selected by the hijackers as the date of the attack because it resembled 9-1-1, the phone number used to report emergencies in the United States. However, Lawrence Wright wrote that the hijackers chose the date when John III Sobieski, the King of Poland and Grand Duke of Lithuania, began the battle that turned back the Ottoman Empire's Muslim armies that were attempting to capture Vienna (present-day capital of Austria) on 11 September 1683. During 1683, Vienna was the seat of the Holy Roman Empire and Habsburg monarchy, both major powers in Europe at the time. For Osama bin Laden, this was a date when the West gained some dominance over Islam, and by attacking on this date, he hoped to make a step in Islam "winning" the war for worldwide power and influence.[97]

    Prior intelligence
    Main article: September 11 intelligence before the attacks
    In late 1999, Al-Qaeda associate Walid bin Attash ("Khallad") contacted Mihdhar and told him to meet in Kuala Lumpur, Malaysia; Hazmi and Abu Bara al Yemeni would also be in attendance. The NSA intercepted a telephone call mentioning the meeting, Mihdhar, and the name "Nawaf" (Hazmi); while the agency feared "Something nefarious might be afoot", it took no further action.

    The CIA had already been alerted by Saudi intelligence about the status of Mihdhar and Hazmi as Al-Qaeda members and a CIA team broke into Mihdhar's Dubai hotel room and discovered that Mihdhar had a U.S. visa. While Alec Station alerted intelligence agencies worldwide about this fact, it did not share this information with the FBI. The Malaysian Special Branch observed the January 5, 2000, meeting of the two Al-Qaeda members and informed the CIA that Mihdhar, Hazmi, and Khallad were flying to Bangkok, but the CIA never notified other agencies of this, nor did it ask the State Department to put Mihdhar on its watchlist. An FBI liaison to Alec Station asked permission to inform the FBI of the meeting but was told: "This is not a matter for the FBI".[98]

    By late June, senior counter-terrorism official Richard Clarke and CIA director George Tenet were "convinced that a major series of attacks was about to come", although the CIA believed the attacks would likely occur in Saudi Arabia or Israel.[99] In early July, Clarke put domestic agencies on "full alert", telling them, "Something spectacular is going to happen here, and it's going to happen soon". He asked the FBI and the State Department to alert the embassies and police departments, and the Defense Department to go to "Threat Condition Delta".[100][101] Clarke later wrote: "Somewhere in CIA there was information that two known al Qaeda terrorists had come into the United States. Somewhere in the FBI, there was information that strange things had been going on at flight schools in the United States ... They had specific information about individual terrorists from which one could have deduced what was about to happen. None of that information got to me or the White House".[102]

    [...] by July [2001], with word spreading of a coming attack, a schism emerged among the senior leadership of al Qaeda. Several senior members reportedly agreed with Mullah Omar. Those who reportedly sided with bin Ladin included Atef, Sulayman Abu Ghayth, and KSM. But those said to have opposed him were weighty figures in the organization-including Abu Hafs the Mauritanian, Sheikh Saeed al Masri, and Sayf al Adl. One senior al Qaeda operative claims to recall Bin Ladin arguing that attacks against the United States needed to be carried out immediately to support insurgency in the Israeli-occupied territories and protest the presence of U.S. forces in Saudi Arabia.
    — 9/11 Commission Report, pp. 251[103]
    On July 13, Tom Wilshire, a CIA agent assigned to the FBI's international terrorism division, emailed his superiors at the CIA's Counterterrorism Center (CTC) requesting permission to inform the FBI that Hazmi was in the country and that Mihdhar had a U.S. visa. The CIA never responded.[104]

    The same day in July, Margarette Gillespie, an FBI analyst working in the CTC, was told to review material about the Malaysia meeting. She was not told of the participant's presence in the U.S. The CIA gave Gillespie surveillance photos of Mihdhar and Hazmi from the meeting to show to FBI counterterrorism but did not tell her their significance. The Intelink database informed her not to share intelligence material at the meeting with criminal investigators. When shown the photos, the FBI refused more details on their significance, and they were not given Mihdhar's date of birth or passport number.[105] In late August 2001, Gillespie told the INS, the State Department, the Customs Service, and the FBI to put Hazmi and Mihdhar on their watchlists, but the FBI was prohibited from using criminal agents in searching for the duo, hindering their efforts.[106]

    Also in July, a Phoenix-based FBI agent sent a message to FBI headquarters, Alec Station, and FBI agents in New York alerting them to "the possibility of a coordinated effort by Osama bin Laden to send students to the United States to attend civil aviation universities and colleges". The agent, Kenneth Williams, suggested the need to interview all flight school managers and identify all Arab students seeking flight training.[107] In July, Jordan alerted the U.S. that Al-Qaeda was planning an attack on the U.S.; "months later", Jordan notified the U.S. that the attack's codename was "The Big Wedding" and that it involved aeroplanes.[108]

    On August 6, 2001, the CIA's Presidential Daily Brief ("PDB"), designated "For the President Only", was entitled Bin Ladin Determined to Strike in US. The memo noted that FBI information "indicates patterns of suspicious activity in this country consistent with preparations for hijackings or other types of attacks".[109]

    In mid-August, one Minnesota flight school alerted the FBI about Zacarias Moussaoui, who had asked "suspicious questions". The FBI found that Moussaoui was a radical who had travelled to Pakistan, and the INS arrested him for overstaying his French visa. Their request to search his laptop was denied by FBI headquarters due to the lack of probable cause.[110]

    The failures in intelligence-sharing were attributed to 1995 Justice Department policies limiting intelligence-sharing, combined with CIA and NSA reluctance to reveal "sensitive sources and methods" such as tapped phones.[111] Testifying before the 9/11 Commission in April 2004, then – Attorney General John Ashcroft recalled that the "single greatest structural cause for the September 11th problem was the wall that segregated or separated criminal investigators and intelligence agents".[112] Clarke also wrote: "[T]here were... failures to get information to the right place at the right time".[113]

    Attacks
    For a chronological guide, see Timeline for the day of the September 11 attacks.
    Early on the morning of Tuesday, September 11, 2001, nineteen hijackers took control of four commercial airliners (two Boeing 757s and two Boeing 767s) en route to California after takeoffs from Logan International Airport in Boston, Massachusetts; Newark Liberty International Airport in Newark, New Jersey; and Washington Dulles International Airport in Loudoun and Fairfax counties in Virginia.[114] Large planes with long coast-to-coast flights were selected for hijacking because they would have more fuel.[115]

    Key info about the four flights
    Operator
    Flight number
    Aircraft type
    Time of departure*
    Time of crash*
    Departed from
    En route to
    Crash site
    Fatalities
    (There were no survivors from the flights)
    Crew
    Passengers†
    Ground§
    Hijackers
    Total‡
    American Airlines
    11
    Boeing 767-223ER
    7:59 a.m.
    8:46 a.m.
    Logan International Airport
    Los Angeles International Airport
    North Tower of the World Trade Center, floors 93 to 99
    11
    76
    2,606
    5
    2,763
    United Airlines
    175
    Boeing 767–222
    8:14 a.m.
    9:03 a.m.[g]
    Logan International Airport
    Los Angeles International Airport
    South Tower of the World Trade Center, floors 77 to 85
    9
    51
    5
    American Airlines
    77
    Boeing 757–223
    8:20 a.m.
    9:37 a.m.
    Washington Dulles International Airport
    Los Angeles International Airport
    West wall of Pentagon
    6
    53
    125
    5
    189
    United Airlines
    93
    Boeing 757–222
    8:42 a.m.
    10:03 a.m.
    Newark Int'l Airport
    San Francisco International Airport
    Field in Stonycreek Township near Shanksville
    7
    33
    0
    4
    44
    Totals
    33
    213
    2,731
    19
    2,996
    * Eastern Daylight Time (UTC−04:00)
    † Excluding hijackers
    § Including emergency workers
    ‡ Including hijackers

    The four crashes
    See also: Media documentation of the September 11 attacks
    Duration: 52 seconds.0:52
    United Airlines Flight 175 crashes into 2 World Trade Center
    At 7:59 a.m., American Airlines Flight 11 took off from Logan International Airport in Boston.[116] Fifteen minutes into the flight, five hijackers armed with boxcutters took over the plane, injuring at least three people (and possibly killing one)[117][118][119] before forcing their way into the cockpit. The terrorists also displayed an apparent explosive and sprayed mace into the cabin, to frighten the hostages into submission and further hinder resistance.[120] Back at Logan, United Airlines Flight 175 took off at 8:14 a.m., approximately the same time as Flight 11's hijacking.[121] Hundreds of miles southwest at Dulles International Airport, American Airlines Flight 77 left the runway at 8:20 a.m.[121] Flight 175's journey proceeded normally for 28 minutes until 8:42 a.m., when a group of five hijacked the plane, murdering both pilots and stabbing several crew members before assuming control of the aircraft. These hijackers also used bomb threats to instil fear into the passengers and crew,[122] also spraying chemical weapons to disable any opposition.[123] Concurrently, United Airlines Flight 93 departed from Newark International Airport in New Jersey;[121] originally scheduled to pull away from the gate at 8:00 a.m., the plane was running 42 minutes late.

    At 8:46 a.m., Flight 11 was deliberately crashed into the north face of the World Trade Center's North Tower (1 WTC),[124] although the initial presumption by many was that this was merely an accident.[125] At 8:51 a.m., American Airlines Flight 77 was also taken over by another group of five who forcibly entered the cockpit 31 minutes after takeoff.[126] Although the hijackers on this flight were equipped with knives,[127] there were no reports of anyone on board being stabbed, nor did the two people who made phone calls mention the use of mace or a bomb threat.

    Seventeen minutes after the first plane crashed into the North Tower, Flight 175 was flown into the South Tower's southern facade (2 WTC)[128] at 9:03 a.m.,[g] demonstrating that the first crash was not an accident, but rather a terrorist attack.[129][130]

    Four men aboard Flight 93 struck suddenly, killing at least one passenger, after having waited 46 minutes to make their move—a holdup that proved disastrous for the terrorists when combined with the delayed takeoff from the runway;[131] they stormed the cockpit and seized control of the plane at 9:28 a.m., turning the plane eastbound and setting course for Washington, D.C.[132] Much like their counterparts on the first two flights, the fourth team also used bomb threats and filled the cabin with mace.[133]

    Nine minutes after Flight 93's hijacking, Flight 77 crashed into the west side of the Pentagon.[134] Because of the two delays,[135] the passengers and crew of Flight 93 had time to be made aware of the previous attacks through phone calls to the ground, and as a result an uprising was hastily organized to take control of the aircraft at 9:57 a.m.[136] Within minutes, passengers had fought their way to the front of the cabin and began breaking down the cockpit door. Fearing their captives would gain the upper hand, the hijackers rolled the plane and pitched it into a nosedive,[137][138] crashing into a field near Shanksville, Pennsylvania, southeast of Pittsburgh, at 10:03 a.m. The plane was about twenty minutes away from reaching D.C. at the time of the crash, and its target is believed to have been either the Capitol Building or the White House.[115][136]

    Some passengers and crew members who called from the aircraft using the cabin air phone service and mobile phones provided details: several hijackers were aboard each plane; they used mace, tear gas, or pepper spray to overcome attendants; and some people aboard had been stabbed.[139] Reports indicated hijackers stabbed and killed pilots, flight attendants, and one or more passengers.[114][140] According to the 9/11 Commission's final report, the hijackers had recently purchased multi-function hand tools and assorted Leatherman-type utility knives with locking blades (which were not forbidden to passengers at the time), but these were not found among the possessions left behind by the hijackers.[141][142] A flight attendant on Flight 11, a passenger on Flight 175, and passengers on Flight 93 said the hijackers had bombs, but one of the passengers said he thought the bombs were fake. The FBI found no traces of explosives at the crash sites, and the 9/11 Commission concluded that the bombs were probably fake.[114] On at least two of the hijacked flights—American 11 and United 93—the terrorists claimed over the PA system that they were taking hostages and were returning to the airport to have a ransom demand met, a clear attempt to prevent passengers from fighting back. Both attempts failed, however, as both hijacker pilots in these instances (Mohamed Atta[143] and Ziad Jarrah,[144] respectively) keyed the wrong switch and mistakenly transmitted their messages to ATC instead of the people on the plane as intended, tipping off the flight controllers that the planes had been hijacked.

     Duration: 3 minutes and 12 seconds.3:12Security camera footage of American Airlines Flight 77 crashing into the Pentagon;[145] the plane collides with The Pentagon approximately 86 seconds after the start of the recording
    Three buildings in the World Trade Center collapsed due to fire-induced structural failure. Although the South Tower was struck 17 minutes after the North Tower, the plane's impact zone was far lower, at a much faster speed, and into a corner, with the unevenly-balanced additional structural weight causing it to collapse first at 9:59 a.m.,[146]: 80 [147]: 322  having burned for 56 minutes[i] in the fire caused by the crash of United Airlines Flight 175 and the explosion of its fuel. The North Tower lasted another 29 minutes before collapsing at 10:28 a.m.,[j] one hour and forty-two minutes[h] after being struck by American Airlines Flight 11. When the North Tower collapsed, debris fell on the nearby 7 World Trade Center building (7 WTC), damaging the building and starting fires. These fires burned for nearly seven hours, compromising the building's structural integrity, and 7 WTC collapsed at 5:21 p.m.[151][152] The west side of the Pentagon sustained significant damage.

    At 9:42 a.m., the Federal Aviation Administration (FAA) grounded all civilian aircraft within the continental U.S., and civilian aircraft already in flight were told to land immediately.[153] All international civilian aircraft were either turned back or redirected to airports in Canada or Mexico, and were banned from landing on United States territory for three days.[154] The attacks created widespread confusion among news organizations and air traffic controllers. Among unconfirmed and often contradictory news reports aired throughout the day, one of the most prevalent claimed a car bomb had been detonated at the U.S. State Department's headquarters in Washington, D.C.[155] Another jet (Delta Air Lines Flight 1989) was suspected of having been hijacked, but the aircraft responded to controllers and landed safely in Cleveland, Ohio.[156]

    In an April 2002 interview, Khalid Sheikh Mohammed and Ramzi bin al-Shibh, who are believed to have organized the attacks, said Flight 93's intended target was the United States Capitol, not the White House.[157] During the planning stage of the attacks, Mohamed Atta (Flight 11's hijacker and pilot) thought the White House might be too tough a target and sought an assessment from Hani Hanjour (who hijacked and piloted Flight 77).[158] Mohammed said Al-Qaeda initially planned to target nuclear installations rather than the World Trade Center and the Pentagon, but decided against it, fearing things could "get out of control".[159] Final decisions on targets, according to Mohammed, were left in the hands of the pilots.[158] If any pilot could not reach his intended target, he was to crash the plane.[115]

    Casualties
    Main articles: Casualties of the September 11 attacks and Lists of victims of the September 11 attacks
     One of three observable falls from the South Tower.[160] A similar photograph of a victim from the North Tower titled The Falling Man gained wide acclamation.
    The attack on the World Trade Center's North Tower single-handedly[k] made 9/11 the deadliest act of terrorism in world history.[162] Taken together, the four crashes caused the deaths of 2,996 people (including the hijackers) and injured thousands more.[163] The death toll included 265 on the four planes (from which there were no survivors); 2,606 in the World Trade Center and in the surrounding area; and 125 at The Pentagon.[164][165] Most who died were civilians, as well as 343 firefighters, 72 law enforcement officers, 55 military personnel, and the 19 terrorists.[166][167] After New York, New Jersey lost the most state citizens.[168] More than 90 countries lost citizens in the attacks.[169]

    In New York City, more than 90% of the workers and visitors who died in the towers had been at or above the points of impact. In the North Tower, between 1,344[170] and 1,402[171] people were at, above or one floor below the point of impact and all died. Hundreds were killed instantly the moment the plane struck.[172] The estimated 800 people[173] who survived the impact were trapped and died in the fires or from smoke inhalation; fell or jumped from the tower to escape the smoke and flames; or were killed in the building's collapse. The destruction of all three staircases in the North Tower when Flight 11 hit made it impossible for anyone from the impact zone upward to escape. 107 people not trapped by the impact died.[174] When the plane struck between floors 93 and 99, the 92nd floor was also rendered inescapable when the crash severed all elevator shafts while debris falling from the impact zone blocked the stairwells, ensuring the deaths of all 69 workers on the floor below the point of impact.

    In the South Tower, around 600 people were on or above the 77th floor when Flight 175 struck and few survived. As with the North Tower, hundreds were killed at the moment of impact. Unlike those in the North Tower, the estimated 300 survivors[173] of the crash were not technically trapped by the damage done by Flight 175's impact, but most were either unaware that a means of escape still existed or were unable to use it. One stairway, Stairwell A, narrowly avoided being destroyed as Flight 175 crashed through the building, allowing 14 people located on the floors of impact (including Stanley Praimnath, a man who saw the plane coming at him) and four more from the floors above to escape. New York City 9-1-1 operators who received calls from people inside the tower were not well informed of the situation as it rapidly unfolded and as a result, told callers not to descend the tower on their own.[175] In total, 630 people died in the South Tower, fewer than half the number killed in the North Tower.[174] Of the 100–200 people witnessed jumping or falling to their deaths that morning,[176] only three recorded sightings were from the South Tower.[177]: 86  Casualties in the South Tower were significantly reduced because some occupants decided to leave the building immediately following the first crash, and because Eric Eisenberg, an executive at AON Insurance, made the decision to evacuate the floors occupied by AON (floors 92 and 98–105) in the moments following the impact of Flight 11. The 17-minute gap allowed over 900 of the 1,100 AON employees present on-site to evacuate from above the 77th floor before the South Tower was struck; Eisenberg was among the nearly 200 who did not escape. Similar pre-impact evacuations were carried out by companies such as Fiduciary Trust, CSC, and Euro Brokers, all of whom had offices on floors above the point of impact. The failure to order a full evacuation of the South Tower after the first plane crash into the North Tower was described by USA Today as "one of the day's great tragedies".[178]

    As exemplified in the photograph The Falling Man, more than 200 people fell to their deaths from the burning towers, most of whom were forced to jump to escape the extreme heat, fire and smoke.[179] Some occupants of each tower above the point of impact made their way toward the roof in the hope of helicopter rescue, but the roof access doors were locked.[180] No plan existed for helicopter rescues, and the combination of roof equipment, thick smoke and intense heat prevented helicopters from approaching.[181]

    At the World Trade Center complex, a total of 414 emergency workers died as they tried to rescue people and fight fires, while another law enforcement officer was separately killed when United 93 crashed. The New York City Fire Department (FDNY) lost 343 firefighters, including a chaplain and two paramedics.[182][183][184] The New York City Police Department (NYPD) lost 23 officers.[185] The Port Authority Police Department (PAPD) lost 37 officers.[186] Eight emergency medical technicians (EMTs) and paramedics from private emergency medical services (EMS) units were killed.[187] Almost all of the emergency personnel who died at the scene that day were killed as a result of the towers collapsing, with the exception of one who was struck by a civilian falling from the upper floors of the South Tower.[188]

    Cantor Fitzgerald L.P. (an investment bank on the North Tower's 101st–105th floors) lost 658 employees, considerably more than any other employer.[189] Marsh Inc., located immediately below Cantor Fitzgerald on floors 93–100, lost 358 employees,[190][191] and 175 employees of Aon Corporation were also killed.[192] The National Institute of Standards and Technology (NIST) estimated that about 17,400 civilians were in the World Trade Center complex at the time of the attacks. Turnstile counts from the Port Authority suggest 14,154 people were typically in the Twin Towers by 8:45 a.m.[193][page needed][194] Most people below the impact zone safely evacuated the buildings.[195]

    In Arlington County, Virginia, 125 Pentagon workers died when Flight 77 crashed into the building's western side. 70 were civilians and 55 were military personnel, many of whom worked for the United States Army or the United States Navy. The Army lost 47 civilian employees; six civilian contractors; and 22 soldiers, while the Navy lost six civilian employees; three civilian contractors; and 33 sailors. Seven Defense Intelligence Agency (DIA) civilian employees died, and one Office of the Secretary of Defense (OSD) contractor.[196][197][198] Lieutenant General Timothy Maude, an Army Deputy Chief of Staff, was the highest-ranking military official killed at the Pentagon.[199]

    Weeks after the attack, the death toll was estimated to be over 6,000, more than twice the number of deaths eventually confirmed.[200] The city was only able to identify remains for about 1,600 of the World Trade Center victims. The medical examiner's office collected "about 10,000 unidentified bone and tissue fragments that cannot be matched to the list of the dead".[201] Bone fragments were still being found in 2006 by workers who were preparing to demolish the damaged Deutsche Bank Building.

    In 2010, a team of anthropologists and archaeologists searched for human remains and personal items at the Fresh Kills Landfill, where 72 more human remains were recovered, bringing the total found to 1,845. DNA profiling continues in an attempt to identify additional victims.[202][203][204] The remains are being held in storage in Memorial Park, outside the New York City Medical Examiner's facilities. It was expected that the remains would be moved in 2013 to a repository behind a wall at the 9/11 museum.[needs update][205]

    In July 2011, a team of scientists at the Office of Chief Medical Examiner continued efforts to identify remains, in the hope that improved technology will allow them to identify other victims.[204] In August 2017, the 1,641st victim was identified as a result of newly available DNA technology,[206] and a 1,642nd during July 2018.[207] Three more victims were identified in October 2019,[208] two in September 2021[209] and an additional two in September 2023.[210] As of September 2023, 1,104 victims remain unidentified,[210] amounting to 40% of the deaths in the World Trade Center attacks.[209] On September 25, 2023, the FDNY reported that with the death of EMT Hilda Vannata and retired firefighter Robert Fulco, marking the 342nd and 343rd deaths from 9/11-related illnesses, the department had now lost the same number of firefighters, EMTs, and civilian members to 9/11-related illnesses as it did on the day of the attacks.[211][212]

    Damage
    Further information: Collapse of the World Trade Center
     The World Trade Center site, called Ground Zero, with an overlay showing the original buildings' locations
    Along with the 110-floor Twin Towers, numerous other buildings at the World Trade Center site were destroyed or badly damaged, including WTC buildings 3 through 7 and St. Nicholas Greek Orthodox Church.[213] The North Tower, South Tower, the Marriott Hotel (3 WTC), and 7 WTC were destroyed. The U.S. Customs House (6 World Trade Center), 4 World Trade Center, 5 World Trade Center, and both pedestrian bridges connecting buildings were severely damaged. The Deutsche Bank Building (still popularly referred to as the Bankers Trust Building) on 130 Liberty Street was partially damaged and demolished some years later, starting in 2007.[214][215] The two buildings of the World Financial Center also suffered damage.[214] The last fires at the World Trade Center site were extinguished on December 20, exactly 100 days after the attacks.[216]

    The Deutsche Bank Building across Liberty Street from the World Trade Center complex was later condemned as uninhabitable because of toxic conditions inside the office tower and was deconstructed.[217][218] The Borough of Manhattan Community College's Fiterman Hall at 30 West Broadway was condemned due to extensive damage from the attacks, and then reopened in 2012.[219]

    Other neighbouring buildings (including 90 West Street and the Verizon Building) suffered major damage but have been restored.[220] World Financial Center buildings, One Liberty Plaza, the Millenium Hilton, and 90 Church Street had moderate damage and have since been restored.[221] Communications equipment on top of the North Tower was also destroyed, with only WCBS-TV maintaining a backup transmitter on the Empire State Building, but media stations were quickly able to reroute the signals and resume their broadcasts.[213][222]

     A September 14 aerial view of the Pentagon during cleanup operations
    The PATH train system's World Trade Center station was located under the complex. As a result, the station was demolished when the towers collapsed, and the tunnels leading to Exchange Place station in Jersey City, New Jersey, were flooded with water.[223] The station was rebuilt as the $4 billion World Trade Center Transportation Hub, which reopened in March 2015.[224][225] The Cortlandt Street station on the New York City Subway's IRT Broadway–Seventh Avenue Line was also in close proximity to the World Trade Center complex, and the entire station, along with the surrounding track, was reduced to rubble.[226] The latter station was rebuilt and reopened to the public on September 8, 2018.[227] The Pentagon was extensively damaged by the impact of American Airlines Flight 77 and the ensuing fires, causing one section of the building to collapse.[228] As the aeroplane approached the Pentagon, its wings knocked down light poles and its right engine hit a power generator before crashing into the western side of the building.[229][230] The plane hit the Pentagon at the first-floor level. The front part of the fuselage disintegrated on impact, while the mid and tail sections kept moving for another fraction of a second.[231] Debris from the tail section penetrated the furthest into the building, breaking through 310 feet (94 m) of the three outermost of the building's five rings.[231][232]

    Rescue efforts
    Main article: Rescue and recovery effort after the September 11 attacks on the World Trade Center
    See also: List of emergency and first responder agencies that responded to the September 11 attacks
     Patrol Boat Hocking of the U.S. Army Corps of Engineers on its way to assist the site on September 11, 2001
    The New York City Fire Department (FDNY) deployed more than 200 units (approximately half of the department) to the World Trade Center.[233] Their efforts were supplemented by numerous off-duty firefighters and emergency medical technicians.[234][233][235] The New York City Police Department (NYPD) sent its Emergency Service Units and other police personnel and deployed its aviation unit.[236] The NYPD aviation unit assessed the situation and decided that helicopter rescues from the towers were not feasible.[237] Numerous police officers of the Port Authority Police Department (PAPD) also participated in rescue efforts.[238] Once on the scene, the FDNY, the NYPD, and the PAPD did not coordinate efforts and performed redundant searches for civilians.[234][239]

    As conditions deteriorated, the NYPD aviation unit relayed information to police commanders, who issued orders for personnel to evacuate the towers; most NYPD officers were able to safely evacuate before the buildings collapsed.[239][240] With separate command posts set up and incompatible radio communications between the agencies, warnings were not passed along to FDNY commanders.[241]

    After the first tower collapsed, FDNY commanders issued evacuation warnings. Due to technical difficulties with malfunctioning radio repeater systems, many firefighters never heard the evacuation orders. 9-1-1 dispatchers also received information from callers that was not passed along to commanders on the scene.[233]

    Reactions
    Main article: Reactions to the September 11 attacks
    See also: Timeline for September following the September 11 attacks
    The 9/11 attacks resulted in immediate responses to the event, including domestic reactions; closings and cancellations; hate crimes; Muslim-American responses to the event; international responses to the attack; and military responses to the events. Shortly after the attacks, a U.S. government fund that was created by an Act of Congress named the September 11th Victim Compensation Fund.[242][243] The purpose of the fund was to compensate the victims of the attacks and their families with the quid pro quo of their agreement not to file lawsuits against the airline corporations involved.[244] Legislation authorizes the fund to disburse a maximum of $7.375 billion, including operational and administrative costs, of U.S. government funds.[245] The fund was set to expire by 2020 but was in 2019 prolonged to allow claims to be filed until October 2090.[246][247]

    Immediate response
    Further information: U.S. military response during the September 11 attacks
    See also: Communication during the September 11 attacks
     President George W. Bush is briefed in Sarasota, Florida, where he learned of the attacks unfolding while visiting Emma E. Booker Elementary School.
     Eight hours after the attacks, U.S. Secretary of Defense Donald Rumsfeld declares "The Pentagon is functioning"
    At 8:32 a.m., FAA officials were notified Flight 11 had been hijacked and they, in turn, notified the North American Aerospace Defense Command (NORAD). NORAD scrambled two F-15s from Otis Air National Guard Base in Massachusetts and they were airborne by 8:53 a.m. Because of slow and confused communication from FAA officials, NORAD had nine minutes' notice, and no notice about any of the other flights before they crashed.

    After both of the Twin Towers had already been hit, more fighters were scrambled from Langley Air Force Base in Virginia at 9:30 a.m.[248] At 10:20 a.m., Vice President Dick Cheney issued orders to shoot down any commercial aircraft that could be positively identified as being hijacked. These instructions were not relayed in time for the fighters to take action.[248][249][250] Some fighters took to the air without live ammunition, knowing that to prevent the hijackers from striking their intended targets, the pilots might have to intercept and crash their fighters into the hijacked planes, possibly ejecting at the last moment.[251]

    For the first time in U.S. history, the emergency preparedness plan called Security Control of Air Traffic and Air Navigation Aids (SCATANA) was invoked,[252] thus stranding tens of thousands of passengers across the world.[253] Ben Sliney, in his first day as the National Operations Manager of the FAA,[254] ordered that American airspace would be closed to all international flights, causing about 500 flights to be turned back or redirected to other countries. Canada received 226 of the diverted flights and launched Operation Yellow Ribbon to deal with the large numbers of grounded planes and stranded passengers.[255]

    The 9/11 attacks had immediate effects on the American people.[256] Police and rescue workers from around the country took a leave of absence from their jobs and travelled to New York City to help recover bodies from the twisted remnants of the Twin Towers.[257] Blood donations across the U.S. surged in the weeks after 9/11.[258][259]

    The deaths of adults in the attacks resulted in over 3,000 children losing a parent.[260] Subsequent studies documented children's reactions to these actual losses and feared losses of life, the protective environment in the attacks' aftermath, and the effects on surviving caregivers.[261][262][263]

    Domestic reactions
    Further information: U.S. government response to the September 11 attacks
     
    President Bush addressing the nation from the White House at 8:30 PM ET
     
    Bush speaking to rescue workers at Ground Zero on September 14
     
    Duration: 34 minutes and 18 seconds.34:18
    During a speech to a joint session of Congress, President George W. Bush pledges "to defend freedom against terrorism". September 20, 2001 (audio only).
    Following the attacks, President George W. Bush's approval rating increased to 90%.[264] On September 20, 2001, he addressed the nation and a joint session of Congress regarding the events of September 11 and the subsequent nine days of rescue and recovery efforts, and described his intended response to the attacks. New York City mayor Rudy Giuliani's highly visible role resulted in praise in New York and nationally.[265]

    Many relief funds were immediately set up to assist the attacks' victims, with the task of providing financial assistance to the survivors of the attacks and the victims' families. By the deadline for victims' compensation on September 11, 2003, 2,833 applications had been received from the families of those who were killed.[266]

    Contingency plans for the continuity of government and the evacuation of leaders were implemented soon after the attacks.[253] Congress was not told that the United States had been under a continuity of government status until February 2002.[267]

    In the largest restructuring of the U.S. government in contemporary history, the United States enacted the Homeland Security Act of 2002, creating the U.S. Department of Homeland Security. Congress also passed the USA PATRIOT Act, saying it would help detect and prosecute terrorism and other crimes.[268] Civil liberties groups have criticized the PATRIOT Act, saying it allows law enforcement to invade citizens' privacy and that it eliminates judicial oversight of law enforcement and domestic intelligence.[269][270][271]

    To effectively combat future acts of terrorism, the National Security Agency (NSA) was given broad powers. NSA commenced warrantless surveillance of telecommunications, which was sometimes criticized as permitting the agency "to eavesdrop on telephone and e-mail communications between the United States and people overseas without a warrant".[272] In response to requests by various intelligence agencies, the United States Foreign Intelligence Surveillance Court permitted an expansion of powers by the U.S. government in seeking, obtaining, and sharing information on U.S. citizens as well as non-U.S. people from around the world.[273]

    Hate crimes
    See also: Islamophobic incidents and Persecution of Muslims
    Six days after the attacks, President Bush made a public appearance at Washington, D.C.'s largest Islamic Center and acknowledged the "incredibly valuable contribution" that millions of American Muslims made to their country and called for them "to be treated with respect".[274] Numerous incidents of harassment and hate crimes against Muslims and South Asians were reported in the days following the attacks.[275][276][277]

    Sikhs were also subject to targeting due to the use of turbans in the Sikh faith, which are stereotypically associated with Muslims. There were reports of attacks on mosques and other religious buildings (including the firebombing of a Hindu temple), and assaults on individuals, including one murder: Balbir Singh Sodhi, a Sikh mistaken for a Muslim, who was fatally shot on September 15, 2001, in Mesa, Arizona.[277] Two dozen members of Osama bin Laden's family were urgently evacuated out of the country on a private charter plane under FBI supervision three days after the attacks.[278]

    According to an academic study, people perceived to be Middle Eastern were as likely to be victims of hate crimes as followers of Islam during this time. The study also found a similar increase in hate crimes against people who may have been perceived as Muslims, Arabs, and others thought to be of Middle Eastern origin.[279] A report by the South Asian American advocacy group known as South Asian Americans Leading Together documented media coverage of 645 bias incidents against Americans of South Asian or Middle Eastern descent between September 11 and 17, 2001. Various crimes such as vandalism, arson, assault, shootings, harassment, and threats in numerous places were documented.[280][281] Women wearing hijab were also targeted.[282]

    Discrimination and racial profiling
    Further information: Detentions following the September 11 attacks, Islamophobia in the United States, and Flying while Muslim
    See also: Airport racial profiling in the United States
    A poll of Arab-Americans, conducted in May 2002, found that 20% had personally experienced discrimination since September 11. A July 2002 poll of Muslim Americans found that 48% believed their lives had changed for the worse since September 11, and 57% had experienced an act of bias or discrimination.[282]

    Following the September 11 attacks, many Pakistani Americans identified themselves as Indians to avoid potential discrimination and obtain jobs (Pakistan was created as a result of the partition of India in 1947).[283]

    By May 2002, there were 488 complaints of employment discrimination reported to the U.S. Equal Employment Opportunity Commission (EEOC). 301 of those were complaints from people fired from their jobs. Similarly, by June 2002, the U.S. Department of Transportation (DOT) had investigated 111 September 11th-related complaints from airline passengers purporting that their religious or ethnic appearance caused them to be singled out at security screenings. DOT investigated an additional 31 complaints from people who alleged they were completely blocked from boarding aeroplanes on the same grounds.[282]

    Muslim American response
    See also: Muslim attitudes towards terrorism and Peace in Islamic philosophy
    Muslim organizations in the United States were swift to condemn the attacks and called "upon Muslim Americans to come forward with their skills and resources to help alleviate the sufferings of the affected people and their families".[284] These organizations included the Islamic Society of North America, American Muslim Alliance, American Muslim Council, Council on American-Islamic Relations, Islamic Circle of North America, and the Shari'a Scholars Association of North America. Along with monetary donations, many Islamic organizations launched blood drives and provided medical assistance, food, and shelter for victims.[285][286][287]

    Interfaith efforts
    Curiosity about Islam increased after the attacks. As a result, many mosques and Islamic centres began holding open houses and participating in outreach efforts to educate non-Muslims about the faith. In the first 10 years after the attacks, interfaith community service increased from 8 to 20 percent and the percentage of U.S. congregations involved in interfaith worship doubled from 7 to 14 percent.[288]

    International reactions
     President of Russia Vladimir Putin (right) with his wife (center) at a commemoration service in New York City on November 16
    The attacks were denounced by mass media and governments worldwide. Across the globe, nations offered pro-American support and solidarity.[289] Leaders in most Middle Eastern countries, as well as Libya and Afghanistan, condemned the attacks. Iraq was a notable exception, with an immediate official statement that "the American cowboys are reaping the fruit of their crimes against humanity".[290] The government of Saudi Arabia officially condemned the attacks, but privately many Saudis favored bin Laden's cause.[291][292]

    Although Palestinian Authority (PA) president Yasser Arafat also condemned the attacks, there were reports of celebrations of disputed size in the West Bank, Gaza Strip, and East Jerusalem.[293][294] Palestinian leaders discredited news broadcasters that justified the attacks or showed celebrations,[295] and the Authority claimed such celebrations do not represent the Palestinians' sentiment, adding that it would not allow "a few kids" to "smear the real face of the Palestinians".[296][297] Footage by CNN[vague] and other news outlets were suggested by a report originating at a Brazilian university to be from 1991; this was later proven to be a false accusation, resulting in a statement being issued by CNN.[298][299] As in the United States, the aftermath of the attacks saw tensions increase in other countries between Muslims and non-Muslims.[300]

    United Nations Security Council Resolution 1368 condemned the attacks and expressed readiness to take all necessary steps to respond and combat all forms of terrorism in accordance with their Charter.[301] Numerous countries introduced anti-terrorism legislation and froze bank accounts they suspected of Al-Qaeda ties.[302][303] Law enforcement and intelligence agencies in a number of countries arrested alleged terrorists.[304][305]

    British Prime Minister Tony Blair said Britain stood "shoulder to shoulder" with the United States.[306] A few days later, Blair flew to Washington, D.C., to affirm British solidarity with the United States. In a speech to Congress nine days after the attacks, which Blair attended as a guest, President Bush declared "America has no truer friend than Great Britain".[307] Subsequently, Prime Minister Blair embarked on two months of diplomacy to rally international support for military action; he held 54 meetings with world leaders and travelled more than 40,000 miles (60,000 km).[308]

    The U.S. set up the Guantanamo Bay detention camp to hold inmates they defined as "illegal enemy combatants". The legitimacy of these detentions has been questioned by the European Union and human rights organizations.[309][310][311]

    On September 25, 2001, Iran's fifth president, Mohammad Khatami, meeting British Foreign Secretary Jack Straw, said: "Iran fully understands the feelings of the Americans about the terrorist attacks in New York and Washington on September 11". He said although the American administrations had been at best indifferent about terrorist operations in Iran (since 1979), the Iranians felt differently and had expressed their sympathetic feelings with bereaved Americans in the tragic incidents in the two cities. He also stated that "Nations should not be punished in place of terrorists".[312]

    According to Radio Farda's website, when the news of the attacks was released, some Iranian citizens gathered in front of the Embassy of Switzerland in Tehran, which serves as the protecting power of the United States in Iran (U.S. interests-protecting office in Iran), to express their sympathy, and some of them lit candles as a symbol of mourning. This piece of news on Radio Farda's website also states that in 2011, on the anniversary of the attacks, the United States Department of State published a post on its blog, in which the Department thanked the Iranian people for their sympathy and stated that it would never forget Iranian people's kindness on those harsh days.[313] After the attacks, both the President[314][315] and the Supreme Leader of Iran, condemned the attacks. The BBC and Time magazine published reports on holding candlelit vigils for the victims of Iranian citizens on their websites.[316][317] According to Politico Magazine, following the attacks, Ali Khamenei, the Supreme Leader of Iran, "suspended the usual 'Death to America' chants at Friday prayers" temporarily.[318]

    In September 2001, shortly after the attacks, some fans of AEK Athens burned an Israeli flag and unsuccessfully tried to burn an American flag. Though the American flag did not catch fire, the fans booed during a moment of silence for victims of the attacks.[319]

    Military operations
    Further information: War on terror and US invasion of Afghanistan
    Events leading up
    to the Iraq War
     
    14 July Revolution 1958
    Iraqi–Kurdish conflict 1961–1991
    17 July Revolution 1968
    Iranian Revolution 1978–1979
    Ba'ath Party Purge 1979
    Iran–Iraq War 1980–1988
    Iraqgate 1982–c.1990
    Iraqi invasion of Kuwait 1990
    Gulf War 1990–1991
    Sanctions against Iraq 1990–2003
    Iraqi uprisings 1991
    Iraqi no-fly zones conflict 1991–2003
    Iraq disarmament crisis 1991–2003
    Arms-to-Iraq affair 1992–1996
    September 11 attacks 2001
    U.S. anthrax attacks 2001
    U.S. invasion of Afghanistan 2001
    Alleged Prague connection 2001
    Iraq Resolution 2002
    Wood Green ricin plot 2003
    Colin Powell's UN presentation 2003
    v
    t
    e
    At 2:40 p.m. on September 11, Secretary of Defense Donald Rumsfeld was issuing rapid orders to his aides to look for evidence of Iraqi involvement. According to notes taken by senior policy official Stephen Cambone, Rumsfeld asked for, "Best info fast. Judge whether they are good enough to hit S.H. [Saddam Hussein] at the same time. Not only UBL" [Osama bin Laden].[320] Cambone's notes quoted Rumsfeld as saying, "Need to move swiftly – Near term target needs – go massive – sweep it all up. Things related and not".[321][322]

    In a meeting at Camp David on September 15 the Bush administration rejected the idea of attacking Iraq in response to the September 11 attacks.[323] Nonetheless, they later invaded the country with allies, citing "Saddam Hussein's support for terrorism".[324] At the time, as many as seven in ten Americans believed the Iraqi president played a role in the 9/11 attacks.[325] Three years later, Bush conceded that he had not.[326]

    The NATO council declared that the terrorist attacks on the United States were an attack on all NATO nations that satisfied Article 5 of the NATO charter. This marked the first invocation of Article 5, which had been written during the Cold War with an attack by the Soviet Union in mind.[327] Australian Prime Minister John Howard, who was in Washington, D.C., during the attacks, invoked Article IV of the ANZUS treaty.[328] The Bush administration announced a war on terror, with the stated goals of bringing bin Laden and Al-Qaeda to justice and preventing the emergence of other terrorist networks.[329] These goals would be accomplished by imposing economic and military sanctions against states harbouring terrorists, and increasing global surveillance and intelligence sharing.[330]

    On September 14, 2001, the U.S. Congress passed the Authorization for the use of Military Force Against Terrorists, which grants the President the authority to use all "necessary and appropriate force" against those whom he determined "planned, authorized, committed or aided" the September 11 attacks or who harboured said persons or groups. It is still in effect to this day.[331]

    On October 7, 2001, the War in Afghanistan began when U.S. and British forces initiated aerial bombing campaigns targeting Taliban and Al-Qaeda camps, then later invaded Afghanistan with ground troops of the Special Forces.[citation needed] This eventually led to the overthrow of the Taliban's rule of Afghanistan with the Fall of Kandahar on December 7, 2001, by U.S.-led coalition forces.[332]

    Al-Qaeda leader Osama bin Laden, who went into hiding in the White Mountains, was targeted by U.S. coalition forces in the Battle of Tora Bora,[333] but he escaped across the Pakistani border and would remain out of sight for almost ten years.[333] In an interview with Tayseer Allouni on 21 October 2001, Bin Laden stated:

    "The events proved the extent of terrorism that America exercises in the world. Bush stated that the world has to be divided in two: Bush and his supporters, and any country that doesn't get into the global crusade is with the terrorists. What terrorism is clearer than this? Many governments were forced to support this "new terrorism.".. America wouldn't live in security until we live it truly in Palestine. This showed the reality of America, which puts Israel's interest above its own people's interest. America won't get out of this crisis until it gets out of the Arabian Peninsula, and until it stops its support of Israel.[334]
    The Philippines and Indonesia, among other nations with their internal conflicts with Islamic terrorism, also increased their military readiness.[335][336] The military forces of the United States of America and the Islamic Republic of Iran cooperated to overthrow the Taliban regime, which had had conflicts with the government of Iran.[318][337][338][339]Iran's Quds Force helped U.S. forces and Afghan rebels in the 2001 uprising in Herat.[340][341][342]

    Aftermath
    Main article: Aftermath of the September 11 attacks
    See also: Post-9/11
    Health issues
    Main article: Health effects arising from the September 11 attacks
     Survivors covered in dust after the collapse of the World Trade towers; a photograph of another dust-covered victim Marcy Borders (1973–2015) subsequently gained much attention[343][344]
    Hundreds of thousands of tons of toxic debris containing more than 2,500 contaminants and known carcinogens were spread across Lower Manhattan when the Twin Towers' collapsed.[345][346] Exposure to the toxins in the debris is alleged to have contributed to fatal or debilitating illnesses among people who were at Ground Zero.[347][348] The Bush administration ordered the Environmental Protection Agency (EPA) to issue reassuring statements regarding air quality in the aftermath of the attacks, citing national security, but the EPA did not determine that air quality had returned to pre-September 11 levels until June 2002.[349]

    Health effects extended to residents, students, and office workers of Lower Manhattan and nearby Chinatown.[350] Several deaths have been linked to the toxic dust, and victims' names were included in the World Trade Center memorial.[351] Approximately 18,000 people have been estimated to have developed illnesses as a result of the toxic dust.[352] There is also scientific speculation that exposure to various toxic products in the air may have negative effects on fetal development.[citation needed] A study of rescue workers released in April 2010 found that all those studied had impaired lung functions and that 30%–40% were reporting little or no improvement in persistent symptoms that started within the first year of the attack.[353]

    Years after the attacks, legal disputes over the costs of illnesses related to the attacks were still in the court system. On October 17, 2006, a federal judge rejected New York City's refusal to pay for health costs for rescue workers, allowing for the possibility of numerous suits against the city.[354] Government officials have been faulted for urging the public to return to lower Manhattan in the weeks shortly after the attacks. Christine Todd Whitman, administrator of the EPA in the attacks' aftermath, was heavily criticized by a U.S. District Judge for incorrectly saying that the area was environmentally safe.[355] Mayor Giuliani was criticized for urging financial industry personnel to return quickly to the greater Wall Street area.[356]

    On December 22, 2010, the United States Congress passed the James L. Zadroga 9/11 Health and Compensation Act, which President Barack Obama signed into law on January 2, 2011. It allocated $4.2 billion to create the World Trade Center Health Program, which provides testing and treatment for people suffering from long-term health problems related to the 9/11 attacks.[357][358] The WTC Health Program replaced preexisting 9/11-related health programs such as the Medical Monitoring and Treatment Program and the WTC Environmental Health Center program.[358]

    In 2020, the NYPD confirmed that 247 NYPD police officers had died due to 9/11-related illnesses. In September 2022, the FDNY confirmed that the total number of firefighters who died due to 9/11-related illnesses was 299. Both agencies believe that the death toll will rise dramatically in the coming years. The Port Authority of New York and New Jersey Police Department (PAPD), the law enforcement agency with jurisdiction over the World Trade Center due to the Port Authority of New York and New Jersey owning the site confirmed that four of its police officers have died of 9/11-related illnesses. The chief of the PAPD at the time, Joseph Morris, made sure that industrial-grade respirators were provided to all PAPD police officers within 48 hours and decided that the same 30 to 40 police officers would be stationed at the World Trade Center pile, drastically lowering the number of total PAPD personnel who would be exposed to the air. The FDNY and NYPD had rotated hundreds, if not thousands, of different personnel from all over New York City to the pile, which exposed many of them to dust that would give them cancer or other diseases years or decades later. Also, they were not given adequate respirators and breathing equipment that could have prevented future diseases.[359][360][361][362]

    Economic
    Main article: Economic effects of the September 11 attacks
     U.S. deficit and debt increases in the seven years following the attacks from 2001 to 2008
    The attacks had a significant economic impact on the United States and world markets.[363][364] The stock exchanges did not open on September 11 and remained closed until September 17. Reopening, the Dow Jones Industrial Average (DJIA) fell 684 points, or 7.1%, to 8921, a record-setting one-day point decline.[365] By the end of the week, the DJIA had fallen 1,369.7 points (14.3%), at the time its largest one-week point drop in history. In 2001 dollars, U.S. stocks lost $1.4 trillion in valuation for the week.[366]

    In New York City, about 430,000 job months and $2.8 billion in wages were lost in the first three months after the attacks. The economic effects were mainly on the economy's export sectors.[367][368][369] The city's GDP was estimated to have declined by $27.3 billion for the last three months of 2001 and all of 2002. The U.S. government provided $11.2 billion in immediate assistance to the Government of New York City in September 2001, and $10.5 billion in early 2002 for economic development and infrastructure needs.[370]

    Also hurt were small businesses in Lower Manhattan near the World Trade Center (18,000 of which were destroyed or displaced), resulting in lost jobs and wages. Assistance was provided by Small Business Administration loans; federal government Community Development Block Grants; and Economic Injury Disaster Loans.[370] Some 31,900,000 square feet (2,960,000 m2) of Lower Manhattan office space was damaged or destroyed.[371] Many wondered whether these jobs would return, and if the damaged tax base would recover.[372] Studies of 9/11's economic effects show the Manhattan office real-estate market and office employment were less affected than first feared, because of the financial services industry's need for face-to-face interaction.[373][374]

    North American air space was closed for several days after the attacks and air travel decreased upon its reopening, leading to a nearly 20% cutback in air travel capacity, and exacerbating financial problems in the struggling U.S. airline industry.[375]

    The September 11 attacks also led to the U.S. wars in Afghanistan and Iraq,[376] as well as additional homeland security spending, totaling at least $5 trillion.[377]

    Effects in Afghanistan
    Further information: War in Afghanistan (2001–2021), Aftermath of the War in Afghanistan (2001–2021), and Killing of Ayman al-Zawahiri
    If Americans are clamouring to bomb Afghanistan back to the Stone Age, they ought to know that this nation does not have so far to go. This is a post-apocalyptic place of felled cities, parched land and downtrodden people.
    — Barry Bearak, The New York Times, September 13, 2001[378]
    Most of the Afghan population was already going hungry at the time of the September 11 attacks.[379] In the aftermath of the attacks, tens of thousands of people attempted to flee Afghanistan due to the possibility of military retaliation by the United States. Pakistan, already home to many Afghan refugees from previous conflicts, closed its border with Afghanistan on September 17, 2001.[380] Thousands of Afghans also fled to the frontier with Tajikistan, although were denied entry.[381] The Taliban leaders in Afghanistan themselves pleaded against military action, saying "We appeal to the United States not to put Afghanistan into more misery because our people have suffered so much", referring to two decades of conflict and the humanitarian crisis attached to it.[378]

    All United Nations expatriates had left Afghanistan after the attacks and no national or international aid workers were at their post. Workers were instead preparing in bordering countries like Pakistan, China and Uzbekistan to prevent a potential "humanitarian catastrophe", amid a critically low food stock for the Afghan population.[382] The World Food Programme stopped importing wheat to Afghanistan on September 12 due to security risks.[383] The Wall Street Journal suggested the creation of a buffer zone in an inevitable war, similarly as in the Bosnian War.[384]

     
     
    From left to right: U.S. soldiers engaged in the War on Terror in Afghanistan in May 2006 • Army Major General Chris Donahue left Afghanistan as the final American soldier on August 30, 2021
    Approximately one month after the attacks, the United States led a broad coalition of international forces to overthrow the Taliban regime from Afghanistan for their harboring of Al-Qaeda.[380] Though Pakistani authorities were initially reluctant to align themselves with the United States against the Taliban, they permitted the coalition access to their military bases, and arrested and handed over to the U.S. over 600 suspected Al-Qaeda members.[385][386]

    In a speech by the Nizari Ismaili Imam at the Nobel Institute in 2005, Aga Khan IV stated that the "9/11 attack on the United States was a direct consequence of the international community ignoring the human tragedy that was Afghanistan at that time".[387]

    In 2011, the U.S. and NATO under President Obama initiated a drawdown of troops in Afghanistan finalized in 2016. During the presidencies of Donald Trump and Joe Biden in 2020 and 2021, the United States alongside its NATO allies withdrew all troops from Afghanistan completing the withdrawal of all regular U.S. troops on August 30, 2021, 12 days before the 20th anniversary of the September 11 attacks,[150][388][389] The withdrawal marked the end of the 2001–2021 War in Afghanistan. Biden said that after nearly 20 years of war, it was clear that the U.S. military could not transform Afghanistan into a modern democracy.[390]

    The second emir of Al-Qaeda, Ayman al-Zawahiri, a close associate of bin Laden, was killed in a U.S. drone strike at his home in Kabul, Afghanistan on July 31, 2022.[391]

    Cultural influence
    Main article: Cultural influence of the September 11 attacks
    Further information: List of cultural references to the September 11 attacks, Entertainment affected by the September 11 attacks, and Osama bin Laden in popular culture
    See also: Osama bin Laden (elephant)
    The impact of 9/11 extends beyond geopolitics and into society and culture in general. Immediate responses to 9/11 included greater focus on home life and time spent with family, higher church attendance, and increased expressions of patriotism such as the flying of American flags.[392] The radio industry responded by removing certain songs from playlists, and the attacks have subsequently been used as background, narrative, or thematic elements in film, music, literature, and humour. Already-running television shows as well as programs developed after 9/11 have reflected post-9/11 cultural concerns.[393]

    9/11 conspiracy theories have become a social phenomenon, despite a lack of support from expert scientists, engineers, and historians.[394] 9/11 has also had a major impact on the religious faith of many individuals; for some it strengthened, to find consolation to cope with the loss of loved ones and overcome their grief; others started to question their faith or lose it entirely because they could not reconcile it with their view of religion.[395][396]

    The culture of America, after the attacks, is noted for heightened security and an increased demand thereof, as well as paranoia and anxiety regarding future terrorist attacks against most of the nation. Psychologists have also confirmed that there has been an increased amount of national anxiety in commercial air travel.[397] Anti-Muslim hate crimes rose nearly ten-fold in 2001 and have subsequently remained "roughly five times higher than the pre-9/11 rate".[398]

    Government policies towards terrorism
    Further information: War on terror, Anti-terrorism legislation, Airport security repercussions due to the September 11 attacks, and Legal issues related to the September 11 attacks
    See also: Senate Intelligence Committee report on CIA torture
     Alleged "extraordinary rendition" illegal flights of the CIA, as reported by Polish newspaper Rzeczpospolita[399]
    As a result of the attacks, many governments across the world passed legislation to combat terrorism.[400] In Germany, where several of the 9/11 terrorists had resided and taken advantage of that country's liberal asylum policies, two major anti-terrorism packages were enacted. The first removed legal loopholes that permitted terrorists to live and raise money in Germany. The second addressed the effectiveness and communication of intelligence and law enforcement.[401] Canada passed the Canadian Anti-Terrorism Act, their first anti-terrorism law.[402] The United Kingdom passed the Anti-terrorism, Crime and Security Act 2001 and the Prevention of Terrorism Act 2005.[403][404] New Zealand enacted the Terrorism Suppression Act 2002.[405]

    In the United States, the Department of Homeland Security was created by the Homeland Security Act of 2002 to coordinate domestic anti-terrorism efforts. The USA Patriot Act gave the federal government greater powers, including the authority to detain foreign terror suspects for a week without charge; to monitor terror suspects' telephone communications, e-mail, and Internet use; and to prosecute suspected terrorists without time restrictions. The FAA ordered that aeroplane cockpits be reinforced to prevent terrorists from gaining control of planes and assigned sky marshals to flights.

    Further, the Aviation and Transportation Security Act made the federal government, rather than airports, responsible for airport security. The law created the Transportation Security Administration to inspect passengers and luggage, causing long delays and concern over passenger privacy.[406] After suspected abuses of the USA Patriot Act were brought to light in June 2013 with articles about the collection of American call records by the NSA and the PRISM program (see Global surveillance disclosures (2013–present)), Representative Jim Sensenbrenner,(R- Wisconsin) who introduced the Patriot Act in 2001, said that the NSA overstepped its bounds.[407][408]

    Criticism of the war on terror has focused on its morality, efficiency, and cost. According to a 2021 study conducted under the auspices of the Watson Institute for International and Public Affairs, the several post-9/11 wars participated in by the United States in its War on Terror have caused the displacement, conservatively calculated, of 38 million people in Afghanistan, Pakistan, Iraq, Libya, Syria, Yemen, Somalia, and the Philippines.[409][410][411] The study estimated these wars caused the deaths of 897,000 to 929,000 people and cost $8 trillion.[411] The U.S. Constitution and U.S. law prohibits the use of torture, yet such human rights violations occurred during the War on Terror under the euphemism "enhanced interrogation".[412][413] In 2005, The Washington Post and Human Rights Watch (HRW) published revelations concerning CIA flights and "black sites", covert prisons operated by the CIA.[414][415] The term "torture by proxy" is used by some critics to describe situations in which the CIA and other U.S. agencies have transferred suspected terrorists to countries known to employ torture.[416][417]

    Legal proceedings
    Main articles: Trials related to the September 11 attacks and United States v. Khalid Sheikh Mohammed
    As all 19 hijackers died in the attacks, they were never prosecuted. Osama bin Laden was never formally indicted but was after a 10-year manhunt killed by U.S. special forces on May 2, 2011 in his compound in Abbottabad, Pakistan.[l][418] The main trial of the attacks against Mohammed and his co-conspirators Walid bin Attash, Ramzi bin al-Shibh, Ammar al-Baluchi, and Mustafa Ahmad al Hawsawi remains unresolved. Khalid Sheikh Mohammed was arrested on March 1, 2003, in Rawalpindi, Pakistan, by Pakistani security officials working with the CIA. He was then held at multiple CIA secret prisons and Guantanamo Bay, where he was interrogated and tortured with methods including waterboarding.[419][420] In 2003, Mustafa al-Hawsawi and Abd al-Aziz Ali were arrested and transferred to US custody. Both would later be accused of providing money and travel assistance to the hijackers.[421] During U.S. hearings at Guantanamo Bay in March 2007, Mohammed again confessed his responsibility for the attacks, stating he "was responsible for the 9/11 operation from A to Z" and that his statement was not made under duress.[42][422] In January 2023, the US government opened up about a potential plea deal,[423] with Biden giving up on the effort in September that year.[424]

    To date, only peripheral persons have thus been convicted for charges in connection with the attacks. These include:

    Zacarias Moussaoui who was indicted in December 2001 and sentenced to life in prison without the possibility of parole in May 2006 by a U.S. federal jury
    Mounir El Motassadeq who was first convicted in February 2003 by a Federal Court of Justice in Germany and was deported to Morocco in October 2018 after serving his sentence[425]
    Abu Dahdah who was arrested in November 2001, sentenced by a Spanish High Court and released from prison in May 2013.[426]
    Investigations
    FBI
    Further information: Hijackers in the September 11 attacks
    Immediately after the attacks, the Federal Bureau of Investigation started PENTTBOM, the largest criminal inquiry in United States history. At its height, more than half of the FBI's agents worked on the investigation and followed a half-million leads.[427] The FBI concluded that there was "clear and irrefutable" evidence linking Al-Qaeda and bin Laden to the attacks.[428]

     Mohamed Atta was one of the main planners of the attacks and the operational leader, responsible for crashing Flight 11 into the North Tower
    The FBI quickly identified the hijackers, including leader Mohamed Atta, when his luggage was discovered at Boston's Logan Airport. Atta had been forced to check two of his three bags due to space limitations on the 19-seat commuter flight he took to Boston. Due to a new policy instituted to prevent flight delays, the luggage failed to make it aboard American Airlines Flight 11 as planned. The luggage contained the hijackers' names, assignments, and Al-Qaeda connections. "It had all these Arab-language [sic] papers that amounted to the Rosetta stone of the investigation", said one FBI agent.[429] Within hours of the attacks, the FBI released the names and in many cases the personal details of the suspected pilots and hijackers.[430][431] Abu Jandal, who served as bin Laden's chief bodyguard for years, confirmed the identity of seven hijackers as Al-Qaeda members during interrogations with the FBI on September 17. He had been jailed in a Yemeni prison since 2000.[432][433] On September 27, 2001, photos of all 19 hijackers were released, along with information about possible nationalities and aliases.[434] Fifteen of the men were from Saudi Arabia, two were from the United Arab Emirates, one was from Egypt, and one was from Lebanon.[435]

    By midday, the U.S. National Security Agency and German intelligence agencies had intercepted communications pointing to Osama bin Laden.[436] Two of the hijackers were known to have traveled with a bin Laden associate to Malaysia in 2000[437] and hijacker Mohamed Atta had previously gone to Afghanistan.[438] He and others were part of a terrorist cell in Hamburg.[439] One of the members of the Hamburg cell in Germany was discovered to have been in communication with Khalid Sheikh Mohammed who was identified as a member of Al-Qaeda.[440]

    Authorities in the United States and the United Kingdom also obtained electronic intercepts, including telephone conversations and electronic bank transfers, which indicated that Mohammed Atef, a bin Laden deputy, was a key figure in the planning of the 9/11 attacks. Intercepts were also obtained that revealed conversations that took place days before September 11 between bin Laden and an associate in Pakistan. In those conversations, the two referred to "an incident that would take place in America on, or around, September 11" and they discussed potential repercussions. In another conversation with an associate in Afghanistan, bin Laden discussed the "scale and effects of a forthcoming operation". These conversations did not specifically mention the World Trade Center, the Pentagon, or other specifics.[441]



    Origins of the 19 hijackers
    Nationality
    Number
    Saudi Arabia
     
    15
    United Arab Emirates
     
    2
    Egypt
     
    1
    Lebanon
     
    1
    In their annual violent crime index for the year 2001, the FBI recorded the deaths from the attacks as murder, in separate tables so as not to mix them with other reported crimes for that year.[442] In a disclaimer, the FBI stated that "the number of deaths is so great that combining it with the traditional crime statistics will have an outlier effect that falsely skews all types of measurements in the program's analyses".[443] New York City also did not include the deaths in their annual crime statistics for 2001.[444]

    CIA
    Further information: September 11 intelligence before the attacks
    In 2004, John L. Helgerson, the Inspector General of the Central Intelligence Agency (CIA), conducted an internal review of the agency's pre-9/11 performance and was harshly critical of senior CIA officials for not doing everything possible to confront terrorism.[445] According to Philip Giraldi in The American Conservative, Helgerson criticized their failure to stop two of the 9/11 hijackers, Nawaf al-Hazmi and Khalid al-Mihdhar, as they entered the United States and their failure to share information on the two men with the FBI.[446]

    In May 2007, senators from both major U.S. political parties (the Republican and Democratic party) drafted legislation to make the review public. One of the backers, Senator Ron Wyden said, "The American people have a right to know what the Central Intelligence Agency was doing in those critical months before 9/11".[447] The report was released in 2009 by President Barack Obama.[445]

    Congressional inquiry
    Main article: Joint Inquiry into Intelligence Community Activities before and after the Terrorist Attacks of September 11, 2001
    In February 2002, the Senate Select Committee on Intelligence and the House Permanent Select Committee on Intelligence formed a joint inquiry into the performance of the U.S. Intelligence Community.[448] Their 832-page report released in December 2002[449] detailed failings of the FBI and CIA to use available information, including about terrorists the CIA knew were in the United States, to disrupt the plots.[450] The joint inquiry developed its information about possible involvement of Saudi Arabian government officials from non-classified sources.[451] Nevertheless, the Bush administration demanded 28 related pages remain classified.[450] In December 2002, the inquiry's chair Bob Graham (D-FL) revealed in an interview that there was "evidence that there were foreign governments involved in facilitating the activities of at least some of the terrorists in the United States".[452] September 11 victim families were frustrated by the unanswered questions and redacted material from the congressional inquiry and demanded an independent commission.[450] September 11 victim families,[453] members of Congress[454] and the Saudi Arabian government are still seeking the release of the documents.[455][456] In June 2016, CIA chief John Brennan said that he believes 28 redacted pages of a congressional inquiry into 9/11 will soon be made public, and that they will prove that the government of Saudi Arabia had no involvement in the September 11 attacks.[457]

    In September 2016, Congress passed the Justice Against Sponsors of Terrorism Act that would allow relatives of victims of the September 11 attacks to sue Saudi Arabia for its government's alleged role in the attacks.[458][459][460]

    9/11 Commission
    Main articles: 9/11 Commission and 9/11 Commission Report
    See also: Criticism of the 9/11 Commission
     The cover of the 9/11 Commission Report, a 585-page report released in 2004, on events leading up to the September 11 attacks and steps recommended to avoid a future terrorist attack
    The National Commission on Terrorist Attacks Upon the United States, popularly known as the 9/11 Commission, chaired by Thomas Kean, governor of New Jersey from 1982 to 1990,[m] was formed in late 2002 to prepare a thorough account of the circumstances surrounding the attacks, including preparedness for and the immediate response to the attacks.[465] On July 22, 2004, the commission issued the 9/11 Commission Report, a 585-page report based on its investigations and interviews. The report detailed the events leading up to the September 11 attacks, concluding that they were carried out by Al-Qaeda. The commission also examined how security and intelligence agencies were inadequately coordinated to prevent the attacks.

    According to the report, "We believe the 9/11 attacks revealed four kinds of failures: in imagination, policy, capabilities, and management".[466] The commission made numerous recommendations on how to prevent future attacks, and in 2011 was dismayed that several of its recommendations had yet to be implemented.[467]

    National Institute of Standards and Technology
    Main article: NIST World Trade Center Disaster Investigation
    See also: 7 World Trade Center § 9/11 and collapse
     The exterior support columns from the lower level of the South Tower remained standing after the building collapsed
    The U.S. National Institute of Standards and Technology (NIST) investigated the collapses of the Twin Towers and 7 WTC. The investigations examined why the buildings collapsed and what fire protection measures were in place, and evaluated how fire protection systems might be improved in future construction.[468] The investigation into the collapse of 1 WTC and 2 WTC was concluded in October 2005 and that of 7 WTC was completed in August 2008.[469]

    NIST found that the fireproofing on the Twin Towers' steel infrastructures was blown off by the initial impact of the planes and that had this not occurred, the towers likely would have remained standing.[470] A 2007 study of the north tower's collapse published by researchers of Purdue University determined that since the plane's impact had stripped off much of the structure's thermal insulation, the heat from a typical office fire would have softened and weakened the exposed girders and columns enough to initiate the collapse regardless of the number of columns cut or damaged by the impact.[471][472]

    The director of the original investigation stated that "the towers did amazingly well. The terrorist aircraft didn't bring the buildings down; it was the fire that followed. It was proven that you could take out two-thirds of the columns in a tower and the building would still stand".[473] The fires weakened the trusses supporting the floors, making the floors sag. The sagging floors pulled on the exterior steel columns causing the exterior columns to bow inward.

    With the damage to the core columns, the buckling exterior columns could no longer support the buildings, causing them to collapse. Additionally, the report found the towers' stairwells were not adequately reinforced to provide adequate emergency escape for people above the impact zones.[474] NIST concluded that uncontrolled fires in 7 WTC caused floor beams and girders to heat and subsequently "caused a critical support column to fail, initiating a fire-induced progressive collapse that brought the building down".[469]

    Alleged Saudi government role
    Main article: Alleged Saudi government role in the September 11 attacks
    See also: Saudi Arabia–United States relations, Saudi Arabia and state-sponsored terrorism, and The 28 pages
    In July 2016, the Obama administration released a document compiled by U.S. investigators Dana Lesemann and Michael Jacobson, known as "File 17",[475] which contains a list naming three dozen people, including the suspected Saudi intelligence officers attached to Saudi Arabia's embassy in Washington, D.C.,[476] which connects Saudi Arabia to the hijackers.[477][478]

    In September 2016, Congress passed the Justice Against Sponsors of Terrorism Act.[479][480] The practical effect of the legislation was to allow the continuation of a longstanding civil lawsuit brought by families of victims of the September 11 attacks against Saudi Arabia for its government's alleged role in the attacks.[481] In March 2018, a U.S. judge formally allowed a suit to move forward against the government of Saudi Arabia brought by 9/11 survivors and victims' families.[479]

    In 2022, the families of some 9/11 victims obtained two videos and a notepad seized from Saudi national Omar al-Bayoumi by the British courts. The first video showed him hosting a party in San Diego for Nawaf al-Hazmi and Khalid al-Mihdhar, the first two hijackers to arrive in the U.S. The other video showed al-Bayoumi greeting the cleric Anwar al-Awlaki, who was blamed for radicalizing Americans and later killed in a CIA drone strike. The notepad depicted a hand-drawn aeroplane and some mathematical equations that, according to a pilot's court statement, might have been used to calculate the rate of descent to get to a target. According to a 2017 FBI memo, from the late 1990s up until the 9/11 attack, al-Bayoumi was a paid cooptee of the Saudi General Intelligence Presidency. As of April 2022 he is believed to be living in Saudi Arabia, which has denied any involvement in 9/11.[482]

    Rebuilding and memorials
    Reconstruction
    Main articles: Rescue and recovery effort after the September 11 attacks on the World Trade Center and Construction of One World Trade Center
    Further information: World Trade Center (2001–present) and World Trade Center site
     The rebuilt World Trade Center, September 2020
    On the day of the attacks, New York City mayor Rudy Giuliani stated: "We will rebuild. We're going to come out of this stronger than before, politically stronger, economically stronger. The skyline will be made whole again".[483]

    Within hours of the attack, a substantial search and rescue operation was launched. After months of around-the-clock operations, the World Trade Center site was cleared by the end of May 2002.[484] The damaged section of the Pentagon was rebuilt and occupied within a year of the attacks.[485] The temporary World Trade Center PATH station opened in late 2003 and construction of the new 7 World Trade Center was completed in 2006. Work on rebuilding the main World Trade Center site was delayed until late 2006 when leaseholder Larry Silverstein and the Port Authority of New York and New Jersey agreed on financing.[486] The construction of One World Trade Center began on April 27, 2006, and reached its full height on May 20, 2013. The spire was installed atop the building at that date, putting One WTC's height at 1,776 feet (541 m) and thus claiming the title of the tallest building in the Western Hemisphere.[487][488] One WTC finished construction and opened on November 3, 2014.[488][489][490]

    On the World Trade Center site, three more office towers were to be built one block east of where the original towers stood.[491] 4 WTC, meanwhile, opened in November 2013, making it the second tower on the site to open behind 7 World Trade Center, as well as the first building on the Port Authority property.[492] 3 WTC opened on June 11, 2018, becoming the fourth skyscraper at the site to be completed.[493] In December 2022, the Nicholas Greek Orthodox Church fully reopened for regular services[494] followed by the opening of the Ronald O. Perelman Performing Arts Center in September 2023.[495] With construction beginning in 2008,[496] 2 World Trade Center remains as of 2023 unfinished.[497] Construction of a 5 World Trade Center is planned to begin in 2024 and be finished by 2029.[498][499]

    Christopher O. Ward, Port Authority of New York and New Jersey Executive Director from 2008 to 2011, is a survivor of the attacks and is credited with getting the construction of the 9/11 site back on track.[500]

    Memorials
    Main article: Memorials and services for the September 11 attacks
     The National September 11 Memorial and Museum in Lower Manhattan, August 2016
    In the days immediately following the attacks, many memorials and vigils were held around the world, and photographs of the dead and missing were posted around Ground Zero. A witness described being unable to "get away from faces of innocent victims who were killed. Their pictures are everywhere, on phone booths, street lights, and walls of subway stations. Everything reminded me of a huge funeral, people were quiet and sad, but also very nice. Before, New York gave me a cold feeling; now people were reaching out to help each other".[501] President Bush proclaimed Friday, September 14, 2001 as Patriot Day.[502]

     Tribute in Light, featuring two columns of light representing the Twin Towers, September 2020
    One of the first memorials was the Tribute in Light, an installation of 88 searchlights at the footprints of the World Trade Center towers.[503] In New York City, the World Trade Center Site Memorial Competition was held to design an appropriate memorial on the site.[504] The winning design, Reflecting Absence, was selected in August 2006, and consists of a pair of reflecting pools in the footprints of the towers, surrounded by a list of the victims' names in an underground memorial space.[505] The memorial was completed on September 11, 2011;[506] a museum also opened on site on May 21, 2014.[507]

    The Sphere by the German sculptor Fritz Koenig is the world's largest bronze sculpture of modern times, and stands between the Twin Towers on the Austin J. Tobin Plaza of the World Trade Center in New York City from 1971 until the terrorist attacks on September 11, 2001. The sculpture, weighing more than 20 tons, was the only remaining work of art to be recovered largely intact from the ruins of the collapsed Twin Towers after the attacks. Since then, the work of art, known in the U.S. as The Sphere, has been transformed into an important symbolic monument of 9/11 commemoration. After being dismantled and stored near a hangar at John F. Kennedy International Airport, the sculpture was the subject of the 2001 documentary The Sphere by filmmaker Percy Adlon. On August 16, 2017, the work was reinstated, installed at the Liberty Park, close to the new World Trade Center aerial and the 9/11 Memorial.[508]

     The National 9/11 Pentagon Memorial in Arlington County, Virginia, September 2008
    In Arlington County, the Pentagon Memorial was completed and opened to the public on the seventh anniversary of the attacks in 2008.[509][510] It consists of a landscaped park with 184 benches facing the Pentagon.[511] When the Pentagon was repaired in 2001–2002, a private chapel and indoor memorial were included, located at the spot where Flight 77 crashed into the building.[512]

    In Shanksville, a concrete-and-glass visitor center was opened on September 10, 2015,[513] situated on a hill overlooking the crash site and the white marble Wall of Names.[514] An observation platform at the visitor centre and the white marble wall are both aligned beneath the path of Flight 93.[514][515] A temporary memorial is located 500 yards (457 m) from the crash site.[516] New York City firefighters donated a cross made of steel from the World Trade Center and mounted on top of a platform shaped like the Pentagon.[517] It was installed outside the firehouse on August 25, 2008.[518] Many other permanent memorials are elsewhere. Scholarships and charities have been established by the victims' families and by many other organizations and private figures.[519]

    On every anniversary in New York City, the names of the victims who died there are read out against a background of sombre music. The President of the United States attends a memorial service at the Pentagon,[520] and asks Americans to observe Patriot Day with a moment of silence. Smaller services are held in Shanksville, Pennsylvania, which are usually attended by the First Lady. In September 2023, President Joe Biden did not attend services in the affected areas, instead marking the day in Anchorage, Alaska, the first US President to do so since the attacks.[521][522][523]

     
    See also
    9/11 Commission
    9/11 Commission Report
    Air France Flight 8969
    Bojinka plot
    Delta 1989 and Korean 085, two other flights that were falsely suspected of being hijacked as part of the September 11 attacks
    List of cultural references to the September 11 attacks
    Khobar Towers bombing
    List of attacks on U.S. territory
    List of aviation incidents involving terrorism
    List of deadliest terrorist attacks in the United States
    List of Islamist terrorist attacks
    List of major terrorist incidents
    List of terrorist incidents in 2001
    List of terrorist incidents in New York CityOutline of the September 11 attacks
    Timeline of al-Qaeda attacks
    Timeline of the September 11 attacks
    USS Cole bombing
    1993 World Trade Center bombing
    1998 United States embassy bombing
    2006 transatlantic aircraft plot
    2007 John F. Kennedy International Airport attack plot
    2009 Bronx terrorism plot
    2010 transatlantic aircraft bomb plot
    2023 Israel–Hamas war
    2004 Madrid train bombings
    References
    Notes
    ^ Other, secondary attack locations include the airspaces of Massachusetts, New Jersey, Ohio, Kentucky and West Virginia.
    ^ The hijackers began their first attack at around 08:13 a.m., when a group of five took control of American Airlines Flight 11, injuring two people and murdering one before forcing their way into the cockpit.
    ^ The fourth and final hijacked plane of the attacks crashed in a Pennsylvania field at 10:03 a.m., which concluded the attacks since all the attackers were now dead and all of the hijacked planes were destroyed. However, the attackers' damage continued as the North Tower kept burning for an additional 25 minutes until it ultimately collapsed by 10:28 a.m.
    ^ Sources vary regarding the number of injuries―some say 6,000[1] while others go as high as 25,000.[2]
    ^ The expression 9/11 is typically pronounced "nine eleven" in English, even including places that use the opposite numerical dating convention; the slash is not pronounced.
    ^ The exact time is disputed. The 9/11 Commission Report states that Flight 11 struck the North Tower at 08:46:40 a.m.,[3] NIST reports 08:46:30 a.m.,[4] and some other sources claim 08:46:26 a.m.[5]
    ^ Jump up to:a b c The exact time is disputed. The 9/11 Commission Report states that Flight 175 struck the South Tower at 09:03:11 a.m.,[6][7] NIST reports 09:02:59 a.m.,[8] and some other sources claim 09:03:02 a.m.[9] In any case, the 16-minute gap between each impact is rounded to 17.[10]
    ^ Jump up to:a b While NIST and the 9/11 Commission give differing accounts of the exact second of the North Tower's collapse initiation, with NIST placing it at 10:28:22 a.m.[11][12] and the commission at 10:28:25 a.m.,[13] it is generally accepted that Flight 11 did not strike the North Tower any sooner than 8:46:26 a.m.,[5] so the time it took for the North Tower to collapse was just shy of 102 minutes either way.
    ^ NIST and the 9/11 Commission both state that the collapse began at 9:58:59 a.m., which is rounded to 9:59[148]: 84 [147]: 322  for simplicity. If the commission's claim that the South Tower was struck at 9:03:11 is to be believed, then the collapse began 55 minutes and 48 seconds after the crash, not 56 minutes.
    ^ The exact time of the North Tower's collapse initiation is disputed, with NIST dubbing the moment it began to collapse as being 10:28:22 a.m.[149] and the 9/11 Commission recording the time as 10:28:25.[150]: 329 
    ^ The massacre at Camp Speicher―often described as the second deadliest act of terrorism in history after 9/11―is said to have killed between 1,095 and 1,700 people.[161] The upper estimate would tie it with the attack on the World Trade Center's North Tower, but until the true death toll of the massacre becomes known, then the hijacking and crash of Flight 11 was the deadliest act of terrorism on record.
    ^ President Barack Obama announced his death on May 1. At the time of the raid, it was early morning of May 2 in Pakistan and late afternoon of May 1 in the U.S.
    ^ Former Secretary of State Henry Kissinger was initially appointed to head the commission[461] but resigned only weeks after being appointed, to avoid conflicts of interest.[462] Former U.S. Senator George Mitchell was originally appointed as the vice chairman, but he stepped down on December 10, 2002, not wanting to sever ties to his law firm.[463] On December 15, 2002, Bush appointed former New Jersey Governor Tom Kean to head the commission.[464]
    Citations
    ^ "A Day of Remembrance". U.S. Embassy in Georgia. September 11, 2022. Archived from the original on October 24, 2023. Retrieved October 27, 2022.
    ^ Stempel, Jonathan (July 29, 2019). "Accused 9/11 mastermind open to role in victims' lawsuit if not executed". Reuters. Archived from the original on April 5, 2020. Retrieved October 27, 2022.
    ^ 9/11 Final Report of the National Commission (2004). Collapse of WTC1 (PDF). p. 24. Archived (PDF) from the original on September 12, 2017. Retrieved December 7, 2023.
    ^ National Institute of Standards and Technology (2005). "Final report on the collapse of the World Trade Center" (PDF). NIST: 69. Archived (PDF) from the original on July 7, 2021. Retrieved December 7, 2023.
    ^ Jump up to:a b "102 Minutes: Last Words at the Trade Center; Fighting to Live as the Towers Die". The New York Times. May 26, 2002. Archived from the original on September 12, 2009. Retrieved June 23, 2023.
    ^ Final Report of the 9/11 Commission on Terrorist Attacks Upon the United States (PDF) (Report). National Commission on Terrorist Attacks Upon the United States. July 22, 2004. pp. 7–8. Archived (PDF) from the original on August 16, 2021. Retrieved August 15, 2021.
    ^ Staff Report of the 9/11 Commission on Terrorist Attacks upon the United States (PDF) (Report). National Commission on Terrorist Attacks Upon the United States. September 2005 [August 26, 2004]. p. 24. Archived (PDF) from the original on July 12, 2014. Retrieved August 15, 2021.
    ^ Building and Fire Research Laboratory (September 2005). Visual Evidence, Damage Estimates, and Timeline Analysis (PDF) (Report). National Institute of Standards and Technology, United States Department of Commerce. p. 27. Archived (PDF) from the original on September 11, 2021. Retrieved August 24, 2021.
    ^ "Timeline for United Airlines Flight 175". NPR. June 17, 2004. Archived from the original on August 24, 2021. Retrieved August 24, 2021.
    ^ 9/11 Commission 2004a, p. 302.
    ^ "9/11/01 timeline: How the September 11, 2001 attacks unfolded". WPVI-TV. September 11, 2023. Archived from the original on November 5, 2023. Retrieved November 4, 2023.
    ^ National Institute of Standards and Technology (2005). "Final report on the collapse of the World Trade Center" (PDF). NIST: 229. Archived (PDF) from the original on July 7, 2021. Retrieved December 7, 2023.
    ^ 9/11 Final Report of the National Commission (2004). Collapse of WTC1 (PDF). p. 329. Archived (PDF) from the original on September 12, 2017. Retrieved December 7, 2023.
    ^ Baker, Peter; Cooper, Helene; Barnes, Julian; Schmitt, Eric (August 1, 2022). "U.S. Drone Strike Kills Ayman al-Zawahri, Top Qaeda Leader". The New York Times. Archived from the original on August 1, 2022. Retrieved August 1, 2022.
    ^ Jump up to:a b Gunaratna, Ronan (2002). Inside Al Qaeda. Berkley Books.
    ^ Formichi, Chiara (2020). Islam as Resistance. Cambridge University Press. p. 206.
    ^ Hafez, Mohammed M. (March 2008). "Jihad After Iraq: Lessons from the Arab Afghans Phenomenon". CTC Sentinel. Vol. 1, no. 4. Archived from the original (PDF) on May 8, 2011.
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    ^ Jump up to:a bMearsheimer (2007), p. 67.
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    ^ "Full text: bin Laden's 'letter to America'". The Guardian. November 24, 2002. Archived from the original on October 8, 2014. Retrieved January 7, 2019. The blood pouring out of Palestine must be equally revenged. You must know that the Palestinians do not cry alone; their women are not widowed alone; their sons are not orphaned alone... American people have chosen, consented to, and affirmed their support for the Israeli oppression of the Palestinians, the occupation and usurpation of their land, and its continuous killing, torture, punishment and expulsion of the Palestinians. The American people have the ability and choice to refuse the policies of their government and even to change them if they want. (b) The American people are the ones who pay the taxes that fund the planes that bomb us in Afghanistan, the tanks that strike and destroy our homes in Palestine, the armies that occupy our lands in the Arabian Gulf, and the fleets that ensure the blockade of Iraq.
    ^ Riedel, Bruce (2008). "1: The Manhattan Raid". The Search for Al Qaeda. Massachusetts Avenue, N.W., Washington, DC, US: Brookings Institution Press. pp. 5, 6. ISBN 978-0-8157-0451-5. The Palestinian intifada, the fierce uprising in the fall of 2000 on the West Bank and Gaza, was a particularly powerful motivating event for.. bin Laden... The intifada's power over bin Laden's thinking about the 9/11 raid is underscored by his repeated attempts to push KSM to advance the timing of the crashes. In September of 2000, he urged KSM to tell Atta to attack immediately to respond to the Sharon visit to the holy sites in Jerusalem; Atta told bin Laden he was not ready yet. When bin Laden learned that Sharon, who had become Israel's prime minister in March 2001, was going to visit the White House early that summer, he again pressed Atta to attack immediately. And again Atta demurred, arguing he needed more time to get the plan and the team ready to go.
    ^ Holbrook, Donald (2014). The Al-Qaeda Doctrine. New York, NY, US: Bloomsbury. p. 145. ISBN 978-1-62356-314-1.
    ^ J. Greenberg, Karen (2005). "October 21, 2001 – Interview with Tayseer Alouni". Al Qaeda Now. New York, US: Cambridge University Press. pp. 192–206. ISBN 978-0-521-85911-0. Last year's blessed intifada helped us to push more for the Palestinian issue. This push helps the other cause. Attacking America helps the cause of Palestine and vice versa. No conflict between the two; on the contrary, one serves the other.
    ^ *Plotz, David (2001) What Does Osama Bin Laden Want? Archived November 15, 2016, at the Wayback Machine, SlateBergen (2001), p. 3
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    ^ "Full transcript of bin Laden's 'Letter to America'". The Guardian. London. November 24, 2002. Archived from the original on April 26, 2019. Retrieved September 3, 2011.
    ^ bin Laden, Osama. "Full transcript of bin Ladin's speech". Al Jazeera. Archived from the original on January 1, 2016. Retrieved April 10, 2012. So I shall talk to you about the story behind those events and shall tell you truthfully about the moments in which the decision was taken, for you to consider
    ^ Bruce Lawrence, ed. (2005). Messages to the World: The Statements of Osama bin Laden. 6 Meard Street, London W1F OEG: Verso. p. 119. ISBN 1-84467-045-7.
    ^ Bergen, Peter L. (2005). Holy War, Inc.: Inside the Secret World of Osama Bin Laden. New York: Simon and Schuster. ISBN 978-0-7432-3467-2. Retrieved March 20, 2020.
    ^ Jump up to:a b "1998 Al Qaeda fatwā". Federation of American Scientists (FAS). February 23, 1998. Archived from the original on April 21, 2010. Retrieved September 3, 2011.
    ^ Jump up to:a b Yusufzai, Rahimullah (September 26, 2001). "Face to face with Osama". The Guardian. London. Archived from the original on January 19, 2008. Retrieved September 3, 2011.
    ^ Pape, Robert A. (2005). Dying to Win: The Strategic Logic of Suicide Terrorism. New York: Random House. ISBN 978-0-8129-7338-9. Retrieved March 20, 2020.
    ^ See also the 1998 Al-Qaeda fatwā: "The ruling to kill the Americans and their allies – civilians and military – is an individual duty for every Muslim who can do it in any country in which it is possible to do it, in order to liberate the al-Aqsa Mosque and the holy mosque [Mecca] from their grip, and in order for their armies to move out of all the lands of Islam, defeated and unable to threaten any Muslim." Quoted from "Al Qaeda's Second Fatwa". PBS NewsHour. PBS. Archived from the original on November 28, 2013. Retrieved May 29, 2014.
    ^ Summers and Swan (2011), pp. 211, 506n.
    ^ Lawrence (2005), p. 239.
    ^ "Full transcript of bin Ladin's speech". Al Jazeera. November 4, 2004. Archived from the original on November 14, 2016. Retrieved August 24, 2016.
    ^ In his taped broadcast from January 2010, bin Laden said "Our attacks against you [the United States] will continue as long as U.S. support for Israel continues. ... The message sent to you with the attempt by the hero Nigerian Umar Farouk Abdulmutallab is a confirmation of our previous message conveyed by the heroes of September 11". Quoted from "Bin Laden: Attacks on U.S. to go on as long as it supports Israel" Archived December 16, 2016, at the Wayback Machine, in Haaretz.com
    ^ Bernard Lewis, 2004. In Bernard Lewis's 2004 book The Crisis of Islam: Holy War and Unholy Terror, he argues that animosity toward the West is best understood with the decline of the once powerful Ottoman empire, compounded by the import of western ideas – Arab socialism, Arab liberalism and Arab secularism
    ^ In "The spirit of terrorism", Jean Baudrillard described 9/11 as the first global event that "questions the very process of globalization". Baudrillard. "The spirit of terrorism". Archived from the original on May 28, 2010. Retrieved June 26, 2011.
    ^ In an essay entitled "Somebody Else's Civil War", Michael Scott Doran argues the attacks are best understood as part of a religious conflict within the Muslim world and that bin Laden's followers "consider themselves an island of true believers surrounded by a sea of iniquity". Hoping that U.S. retaliation would unite the faithful against the West, bin Laden sought to spark revolutions in Arab nations and elsewhere. Doran argues the Osama bin Laden videos attempt to provoke a visceral reaction in the Middle East and ensure that Muslim citizens would react as violently as possible to an increase in U.S. involvement in their region. (Doran, Michael Scott. "Somebody Else's Civil War". Foreign Affairs. No. January/February 2002. Archived from the original on April 23, 2015. Retrieved December 5, 2009. Reprinted in Hoge, James F.; Rose, Gideon (2005). Understanding the War on Terror. New York: Norton. pp. 72–75. ISBN 978-0-87609-347-4.)
    ^ In The Osama bin Laden I Know, Peter Bergen argues the attacks were part of a plan to cause the United States to increase its military and cultural presence in the Middle East, thereby forcing Muslims to confront the idea of a non-Muslim government and to eventually establish conservative Islamic governments in the region.(Bergen (2006), p. 229)
    ^ Lahoud, Nelly (2022). The Bin Laden Papers: How the Abbottabad Raid Revealed the Truth about al-Qaeda, Its Leader and His Family. New Haven (CT): Yale University Press. pp. 16–19, 307. ISBN 978-0-300-26063-2.
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    Bergen, Peter L. (2001). Holy War, Inc.: Inside the Secret World of Osama Bin Laden. Simon and Schuster. ISBN 978-0-7432-3467-2. Retrieved March 18, 2016.
    Bergen, Peter (2006). The Osama Bin Laden I Know: An Oral History of Al Qaeda's Leader. Simon and Schuster. ISBN 978-0-7432-9592-5. Retrieved March 18, 2016.
    Berner, Brad (2007). The World According to Al Qaeda. Peacock Books. ISBN 978-81-248-0114-7. Retrieved March 18, 2016.
    Bodnar, John.. Divided by Terror: American Patriotism after 9/11 (University of North Carolina Press, 2021) how memory of the event stimulated and reshaped patriotism.
    Clarke, Richard (2004). Against All Enemies: Inside America's War on Terror. New York: Free Press. ISBN 978-0-7432-6024-4.
    Dwyer, Jim; Flynn, Kevin (2005). 102 Minutes. Times Books. ISBN 978-0-8050-7682-0. Retrieved March 18, 2016.
    Final Report on the Collapse of World Trade Center Building 7 (PDF) (Report). National Institute of Standards and Technology. November 2008. Retrieved April 11, 2012.
    "Flight Path Study – American Airlines Flight 77" (PDF). National Transportation Safety Board. February 19, 2002. Retrieved September 3, 2011.
    Fouda, Yosri; Fielding, Nick (2004). Masterminds of Terror: The Truth Behind the Most Devastating Terrorist Attack the World Has Ever Seen. Arcade Publishing. ISBN 978-1-55970-717-6. Retrieved March 18, 2016.
    Goldberg, Alfred; et al. (2007). Pentagon 9/11. Washington, D.C.: Government Printing Office. ISBN 978-0-16-078328-9. Retrieved March 18, 2016.
    Graff, Garrett M. (2019). The Only Plane in the Sky: An Oral History of 9/11. New York: Avid Reader Press. ISBN 978-1-5011-8220-4.
    Gunaratna, Ronan (2002). Inside Al Qaeda: global network of terror. Columbia University Press. ISBN 978-0-231-12692-2.
    Holmes, Stephen (2006). "Al Qaeda, September 11, 2001". In Diego Gambetta (ed.). Making sense of suicide missions. Oxford University Press. ISBN 978-0-19-929797-9. Retrieved March 18, 2016.
    Ibrahim, Raymond; bin Laden, Osama (2007). The Al Qaeda reader. Random House Digital, Inc. ISBN 978-0-385-51655-6. Retrieved March 18, 2016.
    Javorsek II, Daniel; Rose, John; Marshall, Christopher; Leitner, Peter (August 5, 2015). "A Formal Risk-Effectiveness Analysis Proposal for the Compartmentalized Intelligence Security Structure". International Journal of Intelligence and CounterIntelligence. 28 (4): 734–61. doi:10.1080/08850607.2015.1051830. S2CID 152911592.
    Jessee, Devin (2006). "Tactical Means, Strategic Ends: Al Qaeda's Use of Denial and Deception" (PDF). International Journal of Intelligence and CounterIntelligence. 18 (3): 367–88. doi:10.1080/09546550600751941. S2CID 144349098. Archived from the original (PDF) on November 21, 2021. Retrieved March 23, 2016.
    Kelley, Christopher (2006). Executing the Constitution: putting the president back into the Constitution. SUNY Press. ISBN 978-0-7914-6727-5. Retrieved March 18, 2016.
    Keppel, Gilles; Milelli, Jean-Pierre; Ghazaleh, Pascale (2008). Al Qaeda in its own words. Harvard University Press. ISBN 978-0-674-02804-3. Retrieved March 18, 2016.
    Lawrence, Bruce (2005). Messages to the world: the statements of Osama Bin Laden. Verso. ISBN 978-1-84467-045-1. Retrieved May 29, 2014.
    Martin, Gus (2011). The SAGE Encyclopedia of Terrorism, Second Edition. Sage. ISBN 978-1-4129-8017-3. Retrieved March 18, 2016.
    McDermott, Terry (2005). Perfect Soldiers: The 9/11 Hijackers. HarperCollins. pp. 191–92. ISBN 978-0-06-058470-2.
    "McKinsey Report". FDNY / McKinsey & Company. August 9, 2002. Archived from the original on June 3, 2010. Retrieved September 25, 2011.
    Mearsheimer, John J. (2007). The Israel Lobby and U.S. Foreign Policy. Macmillan. ISBN 978-0-374-17772-0.
    Murdico, Suzanne (2003). Osama Bin Laden. Rosen Publishing Group. ISBN 978-0-8239-4467-5.
    "The Pentagon Building Performance Report" (PDF). American Society of Civil Engineers (ASCE). January 2003. Archived from the original (PDF) on July 21, 2011. Retrieved September 3, 2011.
    Summers, Anthony; Swan, Robbyn (2011). The Eleventh Day: The Full Story of 9/11 and Osama Bin Laden. New York: Ballantine Books. ISBN 978-1-4000-6659-9. Retrieved March 18, 2016.
    Sunder, Shyam S. (2005). Final Report on the Collapse of the World Trade Center Towers. National Institute of Standards and Technology (NIST). Retrieved September 2, 2011.
    "World Trade Center Building Performance Study – Bankers Trust Building" (PDF). Federal Emergency Management Agency. May 2002. Retrieved July 12, 2007.
    "World Trade Center Building Performance Study – Peripheral Buildings" (PDF). Federal Emergency Management Agency. May 2002. Retrieved September 3, 2011.
    "World Trade Center Building Performance Study" (PDF). Federal Emergency Management Agency. 2002. Retrieved September 2, 2011.
    Wright, Lawrence (2006). The Looming Tower: Al-Qaeda and the Road to 9/11. New York: Alfred A. Knopf. ISBN 978-0-375-41486-2. OCLC 64592193.
    Yitzhak, Ronen (Summer 2016). "The War Against Terrorism and For Stability of the Hashemite Regime: Jordanian Intelligence Challenges in the 21st Century". International Journal of Intelligence and CounterIntelligence. 29 (2): 213–35. doi:10.1080/08850607.2016.1121038. S2CID 155138286.
    Further reading
    The 9/11 Commission Report: Final Report of the National Commission on Terrorist Attacks Upon the United States. National Commission on Terrorist Attacks. July 30, 2010. ISBN 978-1-61640-219-8.
    Atkins, Stephen E (2011). The 9/11 Encyclopedia. ABC-CLIO. ISBN 978-1-59884-921-9.
    Bolton, M. Kent (2006). U.S. National Security and Foreign Policymaking After 9/11: Present at the Re-creation. Rowman & Littlefield. ISBN 978-0-7425-5900-4.
    Caraley, Demetrios (2002). September 11, terrorist attacks, and U.S. foreign policy. Academy of Political Science. ISBN 978-1-884853-01-2.
    Chernick, Howard (2005). Resilient city: the economic impact of 9/11. Russell Sage Foundation. ISBN 978-0-87154-170-3.
    Damico, Amy M; Quay, Sara E. (2010). September 11 in Popular Culture: A Guide. Greenwood. ISBN 978-0-313-35505-9.
    Hampton, Wilborn (2003). September 11, 2001: attack on New York City. Candlewick Press. ISBN 978-0-7636-1949-7.
    Langley, Andrew (2006). September 11: Attack on America. Compass Point Books. ISBN 978-0-7565-1620-8.
    Neria, Yuval; Gross, Raz; Marshall, Randall D.; Susser, Ezra S. (2006). 9/11: mental health in the wake of terrorist attacks. Cambridge University Press. ISBN 978-0-521-83191-8.
    Ryan, Allan A. (2015). The 9/11 Terror Cases: Constitutional Challenges in the War against Al Qaeda. University Press of Kansas. ISBN 978-0-7006-2132-3.
    Strasser, Steven; Whitney, Craig R; United States. Congress. Senate. Select Committee on Intelligence, National Commission on Terrorist Attacks upon the United States (2004). The 9/11 investigations: staff reports of the 9/11 Commission: excerpts from the House-Senate joint inquiry report on 9/11: testimony from fourteen key witnesses, including Richard Clarke, George Tenet, and Condoleezza Rice. PublicAffairs. ISBN 978-1-58648-279-4.
    External links
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    National Commission on Terrorist Attacks Upon the United States official commission website
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    September 11, 2001, Documentary Project from the U.S. Library of Congress, Memory.loc.gov
    September 11, 2001, Web Archive from the U.S. Library of Congress, Minerva
    National Security Archive
    September 11 Digital Archive: Saving the Histories of September 11, 2001, from the Center for History and New Media and the American Social History Project/Center for Media and Learning
    DoD: Khalid Sheikh Mohammed Verbatim Transcript of Combatant Status Review Tribunal Hearing for ISN 10024, from Wikisource
    The 9/11 Legacies Project, Oriental Institute, Czech Academy of Sciences, Prague
    9/11 at 20: A Week of Reflection, Responsible Statecraft, The Quincy Institute
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    From Wikipedia, the free encyclopedia

    For other events on the same date, see September 11 attacks (disambiguation).
    "9/11" redirects here. For the calendar dates, see September 11 and November 9. For the reverse, see 11/9 (disambiguation).
    September 11 attacks
    Part of terrorism in the United States
     
    United Airlines Flight 175 hits the South Tower
     
    Flight 77 hits The Pentagon
     
    Fuselage of Flight 93 in Stonycreek Township
     
    View of the collapsing North Tower
     
    Collapse of the 7 WTC
     
    World Trade Center site after the attacks
     
    The Pentagon building on fire
    Location
    Lower Manhattan, New York
    Arlington County, Virginia
    Stonycreek Township, Pennsylvania
    [a]
    Date
    September 11, 2001; 22 years ago
    c. 08:13 a.m.[b] – 10:03 a.m.[c] (EDT)
    Target
    North Tower
    (AA 11)
    South Tower
    (UA 175)
    The Pentagon
    (AA 77)
    U.S. Capitol Building or the White House
    (UA 93; unsuccessful due to passenger revolt)
    Attack type
    Islamic terrorism, aircraft hijacking, suicide attack, mass murder
    Deaths
    2,996
    (2,977 victims + 19 Al-Qaeda terrorists)
    Injured
    6,000–25,000+[d]
    Perpetrators
    Al-Qaeda led by Osama bin Laden (see also: responsibility)
    No. of participants
    19
    Motive
    Several; see Motives for the September 11 attacks and Fatawā of Osama bin Laden
    Convicted
    Zacarias Moussaoui
    Imad Yarkas
    Mounir el-Motassadeq (see also: Trials related to the September 11 attacks)
    September 11 attacks
     
    showTimeline
    showVictims
    showHijacked airliners
    showCrash sites
    showAftermath
    showResponse
    showPerpetrators
    showInquiries
    showCultural effects
    showMiscellaneous
    v
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    showv
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    al-Qaeda attacks
    The September 11 attacks, commonly known as 9/11,[e] were four coordinated Islamist suicide terrorist attacks carried out by Al-Qaeda against the United States on September 11, 2001. That morning, 19 terrorists hijacked four commercial airliners scheduled to travel from the East Coast to California. The hijackers crashed the first two planes into the Twin Towers of the World Trade Center in New York City, two of the world's five tallest buildings at the time, and aimed the next two flights toward targets in or near Washington, D.C., in an attack on the nation's capital. The third team succeeded in striking the Pentagon, the headquarters of the U.S. Department of Defense in Arlington County, Virginia, while the fourth plane crashed in rural Pennsylvania during a passenger revolt. The September 11 attacks killed 2,977 people, making them the deadliest terrorist attack in history, and instigated the multi-decade global war on terror, fought in Afghanistan, Iraq, and elsewhere.

    The first impact was that of American Airlines Flight 11, which ringleader Mohamed Atta flew into the North Tower of the World Trade Center complex in Lower Manhattan at 8:46 a.m.[f] Seventeen minutes later, at 9:03,[g] the World Trade Center's South Tower was hit by United Airlines Flight 175. Both 110-story skyscrapers collapsed within an hour and forty-one minutes,[h] bringing about the destruction of the remaining five structures in the WTC complex and damaging or destroying nearby buildings. A third flight, American Airlines Flight 77, crashed into the Pentagon at 9:37 a.m., causing a partial collapse. The fourth and final flight, United Airlines Flight 93, flew in the direction of the capital. Alerted to the previous attacks, the passengers fought for control, forcing the hijackers to nosedive the plane into a Stonycreek Township field, near Shanksville, at 10:03 a.m. Investigators determined that Flight 93's target was either the United States Capitol or the White House.

    That evening, the Central Intelligence Agency informed President George W. Bush that its Counterterrorism Center had identified the attacks as having been the work of Al-Qaeda under Osama bin Laden's leadership. The United States formally responded by launching the war on terror and invading Afghanistan to depose the Taliban, which rejected the conditions of U.S. terms to expel Al-Qaeda from Afghanistan and extradite its leaders. The U.S.'s invocation of Article 5 of the North Atlantic Treaty—its only usage to date—called upon allies to fight Al-Qaeda. As U.S. and NATO invasion forces swept through Afghanistan, bin Laden eluded them by disappearing into the White Mountains. He denied any involvement until 2004, when excerpts of a taped statement in which he accepted responsibility for the attacks were released. Al-Qaeda's cited motivations included U.S. support of Israel, the presence of U.S. military bases in Saudi Arabia and sanctions against Iraq. The nearly decade-long manhunt for bin Laden concluded on May 2, 2011, when he was killed during a U.S. military raid after being tracked down to his compound in Abbottabad, Pakistan. The war in Afghanistan continued for another eight years until the agreement was made in February 2020 for American and NATO troops to withdraw from the country, and the last members of the U.S. armed forces left the region on August 30, 2021, after which the Taliban returned to power. Ayman al-Zawahiri, another planner of the attacks who succeeded bin Laden as leader of Al-Qaeda, was killed by U.S. drone strikes in Kabul, Afghanistan on July 31, 2022.[14]

    Excluding the hijackers, the attacks killed 2,977 people, injured thousands more and gave rise to substantial long-term health consequences while also causing at least $10 billion in infrastructure and property damage. It remains the deadliest terrorist attack in history as well as the deadliest incident for firefighters and law enforcement personnel in US history, killing 343 and 72 members, respectively. The loss of life stemming from the impact of Flight 11 secured its place as the most lethal plane crash in aviation history followed by the death toll incurred by Flight 175. The destruction of the World Trade Center and its environs seriously harmed the U.S. economy and induced global market shocks. Many other countries strengthened anti-terrorism legislation and expanded their powers of law enforcement and intelligence agencies. Cleanup of the World Trade Center site (colloquially "Ground Zero") took eight months and was completed in May 2002, while the Pentagon was repaired within a year. After delays in the design of a replacement complex, construction of the One World Trade Center began in November 2006; it opened in November 2014. Memorials to the attacks include the National September 11 Memorial & Museum in New York City, The Pentagon Memorial in Arlington County, Virginia, and the Flight 93 National Memorial at the Pennsylvania crash site.

    Background
    Further information: Fatawā of Osama bin Laden and Political views of Osama bin Laden
    Al-Qaeda
    Main article: Al-Qaeda
    Further information: Jihad
    Al-Qaeda's origins can be traced to 1979, when the Soviet Union invaded Afghanistan.[15] Soon after the invasion, Osama bin Laden traveled to Afghanistan and helped organize Arab mujahideen (the "Afghan Arabs") to resist the "Communist invaders" (Soviets) until their exit from the country in 1989.[16][17] In 1984, bin Laden, along with Islamic scholar Abdullah Azzam, formed the Maktab al-Khidamat (MAK), an organization to support Arab mujahideen who came to join the jihad in Afghanistan.[15][18]

    The U.S. Central Intelligence Agency (CIA) funnelled several billion dollars worth of weapons to the indigenous Afghan mujahideen resistance, a portion of which bled to the Arab volunteers.[19] However, no direct evidence of U.S. aid to bin Laden or any of his affiliates was ever uncovered.[20]

    In 1996, bin Laden issued his first fatwā, which declared war against the United States and demanded the expulsion of all American soldiers from the Arabian Peninsula.[21] In a second 1998 fatwā, bin Laden outlined his objections to American foreign policy with respect to the State of Israel, as well as the continued presence of American troops in Saudi Arabia after the Gulf War.[22] Bin Laden maintained that Muslims are obliged to attack American targets until the aggressive policies of the U.S. against Muslims were reversed. According to bin Laden, Islamic jurists had "throughout Islamic history unanimously agreed that the jihad is an individual duty if the enemy destroys the Muslim countries".[22][23]

    The Hamburg cell in Germany included Islamists who eventually came to be key operatives in the 9/11 attacks.[24] Mohamed Atta; Marwan al-Shehhi; Ziad Jarrah; Ramzi bin al-Shibh; and Said Bahaji were all members of Al-Qaeda's Hamburg cell.[25] Bin Laden asserted that all Muslims must wage a defensive war against the United States, and combat American aggression. He further argued that military strikes against American assets would send a message to the American people, attempting to force the U.S. to re-evaluate its support to Israel, and other aggressive policies.[26] In a 1998 interview with American journalist John Miller, bin Laden stated:

    [W]e tell the Americans as people and we tell the mothers of soldiers and American mothers in general that if they value their lives and the lives of their children, to find a nationalistic government that will look after their interests and not the interests of the Jews. The continuation of tyranny will bring the fight to America, as [the 1993 World Trade Center bomber] Ramzi [Yousef] yourself and others did. This is my message to the American people: to look for a serious government that looks out for their interests and does not attack others, their lands, or their honour. My word to American journalists is not to ask why we did that but to ask what their government has done that forced us to defend ourselves.

    — Osama bin Laden, in his interview with John Miller, May 1998, [27]
    Osama bin Laden
    Main article: Osama bin Laden
    Further information: Militant career of Osama bin Laden
     Osama bin Laden in 1997–1998
    Bin Laden orchestrated the September 11 attacks. He initially denied involvement, but later recanted his denial.[28][29][30] Al Jazeera broadcast a statement by him on September 16, 2001: "I stress that I have not carried out this act, which appears to have been carried out by individuals with their own motivation".[31] In November 2001, U.S. forces recovered a videotape from a destroyed house in Jalalabad, Afghanistan. In the video, bin Laden, talking to Khaled al-Harbi, admitted foreknowledge of the attacks.[32] On December 27, 2001, a second video of bin Laden was released in which he, stopping short of admitting responsibility for the attacks, said:[33]

    It has become clear that the West in general and America in particular have an unspeakable hatred for Islam. ... It is the hatred of crusaders. Terrorism against America deserves to be praised because it was a response to injustice, aimed at forcing America to stop its support for Israel, which kills our people. ... We say that the end of the United States is imminent, whether Bin Laden or his followers are alive or dead, for the awakening of the Muslim ummah [nation] has occurred. ... It is important to hit the economy (of the United States), which is the base of its military power...If the economy is hit they will become reoccupied.

    — Osama bin Laden
    Shortly before the 2004 U.S. presidential election, bin Laden used a taped statement to publicly acknowledge Al-Qaeda's involvement in the attacks.[28] He admitted his direct link to the attacks and said they were carried out because:

    The events that affected my soul in a direct way started in 1982 when America permitted the Israelis to invade Lebanon and the American Sixth Fleet helped them in that. This bombardment began and many were killed and injured and others were terrorised and displaced.

    I couldn't forget those moving scenes, blood and severed limbs, women and children sprawled everywhere. Houses were destroyed along with their occupants high rises demolished over their residents, rockets raining down on our home without mercy...As I looked at those demolished towers in Lebanon, it entered my mind that we should punish the oppressor in kind and that we should destroy towers in America so that they taste some of what we tasted and so that they be deterred from killing our women and children.

    And that day, it was confirmed to me that oppression and the intentional killing of innocent women and children is a deliberate American policy. Destruction is freedom and democracy, while resistance is terrorism and intolerance.[34]
    Bin Laden personally directed his followers to attack the World Trade Center and the Pentagon.[35][36] Another video obtained by Al Jazeera in September 2006 showed bin Laden with one of the attacks' chief planners, Ramzi bin al-Shibh, as well as hijackers, Hamza al-Ghamdi and Wail al-Shehri, amidst making preparations for the attacks.[37] Bin Laden had been on the FBI's Most Wanted List since 1998 for the 1998 bombings of the U.S. embassies in Tanzania and Kenya.[38][39]

    Khalid Sheikh Mohammed and other Al-Qaeda members
    Main article: Khalid Sheikh Mohammed
     Khalid Sheikh Mohammed after his 2003 capture in Rawalpindi, Pakistan
    Journalist Yosri Fouda of the Arabic television channel Al Jazeera reported that in April 2002 Al-Qaeda member Khalid Sheikh Mohammed admitted his involvement in the attacks, along with Ramzi bin al-Shibh.[40][41][42] The 2004 9/11 Commission Report determined that Mohammed's animosity towards the United States, the principal architect of the 9/11 attacks, stemmed from his "violent disagreement with U.S. foreign policy favoring Israel".[43] Mohammed was also an adviser and financier of the 1993 World Trade Center bombing and the uncle of Ramzi Yousef, the lead bomber in that attack.[44][45] In late 1994, Mohammed and Yousef moved on to plan a new terrorist attack called the Bojinka plot planned for January 1995. Despite a failure and Yousef's capture by U.S. forces the following month, the Bojinka plot would influence the later 9/11 attacks.[46]

    In "Substitution for Testimony of Khalid Sheikh Mohammed" from the trial of Zacarias Moussaoui, five people are identified as having been completely aware of the operation's details. They are bin Laden; Khalid Sheikh Mohammed; Ramzi bin al-Shibh; Abu Turab al-Urduni; and Mohammed Atef.[47]

    Motives
    Main article: Motives for the September 11 attacks
    Further information: Fatwa of Osama bin Laden
    Osama bin Laden's declaration of a holy war against the United States, and a 1998 fatwā signed by bin Laden and others that called for the killing of Americans,[22][48] are seen by investigators as evidence of his motivation.[49] During his interview with Hamid Mir in November 2001, Bin Laden defended the September 11 attacks as retaliatory strikes against American atrocities against Muslims across the world. He also maintained that the attacks were not directed against women and children, asserting that the targets of the strikes were symbols of America's "economic and military power".[50][51]

    In bin Laden's November 2002 "Letter to the American people", he explicitly stated that al-Qaeda's motives for the attacks included:

    U.S. support of Israel[52][53]
    Bin Laden's strategy to support and globally expand the Al-Aqsa Intifada[54][55][56][57]
    Attacks against Muslims by U.S.-led coalition in Somalia
    U.S. support of the government of Philippines against Muslims in the Moro conflict
    U.S. support for the Israeli occupation of Southern Lebanon
    U.S. support of Russian atrocities against Muslims in Chechnya
    Pro-American governments in the Middle East (who "act as your agents") being against Muslim interests
    U.S. support of Indian oppression against Muslims in Kashmir
    The presence of U.S. troops in Saudi Arabia[58]
    The sanctions against Iraq[52]
    Environmental destruction[59][60][61]
    After the attacks, bin Laden and Ayman al-Zawahiri released additional videotapes and audio recordings, some of which repeated the above reasons for the attacks. Two relevant publications were bin Laden's 2002 "Letter to the American people"[62] and a 2004 videotape by bin Laden.[63]

    [...] those young men, for whom God has cleared the way, didn't set out to kill children, but rather attacked the biggest centre of military power in the world, the Pentagon, which contains more than 64,000 workers, a military base which has a big concentration of army and intelligence ... As for the World Trade Center, the ones who were attacked and who died in it were part of a financial power. It wasn't a children's school! Neither was it a residence. The consensus is that most of the people who were in the towers were men who backed the biggest financial force in the world, which spreads mischief throughout the world.
    — Osama Bin Laden's interview with Tayseer Allouni, 21 October 2001[64]
    As an adherent of Islam, bin Laden believed that non-Muslims are forbidden from having a permanent presence in the Arabian Peninsula.[65] In 1996, bin Laden issued a fatwā calling for American troops to leave Saudi Arabia. In 1998, Al-Qaeda wrote "For over seven years the United States has been occupying the lands of Islam in the holiest of places, the Arabian Peninsula, plundering its riches, dictating to its rulers, humiliating its people, terrorizing its neighbours, and turning its bases in the Peninsula into a spearhead through which to fight the neighbouring Muslim peoples".[66]

    In a December 1999 interview, bin Laden said he felt that Americans were "too near to Mecca", and considered this a provocation to the entire Muslim world.[67] One analysis of suicide terrorism suggested that without U.S. troops in Saudi Arabia, Al-Qaeda likely would not have been able to get people to commit to suicide missions.[68]

    In the 1998 fatwā, Al-Qaeda identified the Iraq sanctions as a reason to kill Americans, condemning the "protracted blockade" among other actions that constitute a declaration of war against "Allah, his messenger, and Muslims".[66] The fatwā declared that "the ruling to kill the Americans and their allies – civilians and military – is an individual duty for every Muslim who can do it in any country in which it is possible to do it, in order to liberate the al-Aqsa Mosque and the holy mosque of Mecca from their grip, and in order for their [the Americans'] armies to move out of all the lands of Islam, defeated and unable to threaten any Muslim".[22][69]

    In 2004, bin Laden claimed that the idea of destroying the towers had first occurred to him in 1982 when he witnessed Israel's bombardment of high-rise apartment buildings during the 1982 Lebanon War.[70][71] Some analysts, including political scientists John Mearsheimer and Stephen Walt, also claimed that U.S. support of Israel was a motive for the attacks.[53][67] In 2004 and 2010, bin Laden again connected the September 11 attacks with U.S. support of Israel, although most of the letters expressed bin Laden's disdain for President Bush and bin Laden's hope to "destroy and bankrupt" the U.S.[72][73]

    Other motives have been suggested in addition to those stated by bin Laden and Al-Qaeda. Some authors suggested the "humiliation" that resulted from the Islamic world falling behind the Western world – this discrepancy was rendered especially visible by globalization[74][75] and a desire to provoke the U.S. into a broader war against the Islamic world in the hope of motivating more allies to support Al-Qaeda. Similarly, others have argued the 9/11 attacks were a strategic move to provoke America into a war that would incite a pan-Islamic revolution.[76][77]

    Documents seized during the 2011 operation that killed bin Laden included a few notes handwritten by bin Laden in September 2002 with the heading "The Birth of the Idea of September 11". In these notes, he describes how he was inspired by the crash of EgyptAir Flight 990 on October 31, 1999, which was deliberately crashed by co-pilot Gameel Al-Batouti. "This is how the idea of 9/11 was conceived and developed in my head, and that is when we began the planning" bin Laden continued, adding that no one but Abu Hafs and Abu al-Khair knew about it at the time. The 9/11 Commission Report identified Khalid Sheikh Mohammed as the architect of 9/11, but he is not mentioned in bin Laden's notes.[78]

    Planning
    Main article: Planning of the September 11 attacks
     Map of the attacks on the World Trade Center
     Diagram of the World Trade Center attacks
    The attacks were conceived by Khalid Sheikh Mohammed, who first presented it to Osama bin Laden in 1996.[79] At that time, bin Laden and Al-Qaeda were in a period of transition, having just relocated back to Afghanistan from Sudan.[80] The 1998 African embassy bombings and bin Laden's February 1998 fatwā marked a turning point of Al-Qaeda's terrorist operation,[81] as bin Laden became intent on attacking the United States.

    In late 1998 or early 1999, bin Laden approved Mohammed to go forward with organizing the plot.[82] Mohammed, bin Laden, and Mohammed Atef, bin Laden's deputy, held a series of meetings in early 1999.[83] Atef provided operational support, including target selections and helping arrange travel for the hijackers.[80] Bin Laden overruled Mohammed, rejecting potential targets such as the U.S. Bank Tower in Los Angeles for lack of time.[84][85]

    Bin Laden provided leadership and financial support and was involved in selecting participants.[86] He initially selected Nawaf al-Hazmi and Khalid al-Mihdhar, both experienced jihadists who had fought in Bosnia. Hazmi and Mihdhar arrived in the United States in mid-January 2000. In early 2000, Hazmi and Mihdhar took flying lessons in San Diego, California. Both spoke little English, performed poorly in flying lessons, and eventually served as secondary "muscle" hijackers.[87][88]

    In late 1999, a group of men from Hamburg, Germany, arrived in Afghanistan. The group included Mohamed Atta, Marwan al-Shehhi, Ziad Jarrah, and Ramzi bin al-Shibh.[89] Bin Laden selected these men because they were educated, could speak English, and had experience living in the West.[90] New recruits were routinely screened for special skills and Al-Qaeda leaders consequently discovered that Hani Hanjour already had a commercial pilot's license.[91] Mohammed later said that he helped the hijackers blend in by teaching them how to order food in restaurants and dress in Western clothing.[92]

    Hanjour arrived in San Diego on December 8, 2000, joining Hazmi.[93]: 6–7  They soon left for Arizona, where Hanjour took refresher training.[93]: 7  Marwan al-Shehhi arrived at the end of May 2000, while Atta arrived on June 3, 2000, and Jarrah arrived on June 27, 2000.[93]: 6  Bin al-Shibh applied several times for a visa to the United States, but as a Yemeni, he was rejected out of concerns he would overstay his visa.[93]: 4, 14  Bin al-Shibh stayed in Hamburg, providing coordination between Atta and Mohammed.[93]: 16  The three Hamburg cell members all took pilot training in South Florida at Huffman Aviation.[93]: 6 

    In the spring of 2001, the secondary hijackers began arriving in the United States.[94] In July 2001, Atta met with bin al-Shibh in Tarragona, Catalonia, Spain, where they coordinated details of the plot, including final target selection. Bin al-Shibh also passed along bin Laden's wish for the attacks to be carried out as soon as possible.[95] Some of the hijackers received passports from corrupt Saudi officials who were family members or used fraudulent passports to gain entry.[96]

    There have been a few theories that 9/11 was selected by the hijackers as the date of the attack because it resembled 9-1-1, the phone number used to report emergencies in the United States. However, Lawrence Wright wrote that the hijackers chose the date when John III Sobieski, the King of Poland and Grand Duke of Lithuania, began the battle that turned back the Ottoman Empire's Muslim armies that were attempting to capture Vienna (present-day capital of Austria) on 11 September 1683. During 1683, Vienna was the seat of the Holy Roman Empire and Habsburg monarchy, both major powers in Europe at the time. For Osama bin Laden, this was a date when the West gained some dominance over Islam, and by attacking on this date, he hoped to make a step in Islam "winning" the war for worldwide power and influence.[97]

    Prior intelligence
    Main article: September 11 intelligence before the attacks
    In late 1999, Al-Qaeda associate Walid bin Attash ("Khallad") contacted Mihdhar and told him to meet in Kuala Lumpur, Malaysia; Hazmi and Abu Bara al Yemeni would also be in attendance. The NSA intercepted a telephone call mentioning the meeting, Mihdhar, and the name "Nawaf" (Hazmi); while the agency feared "Something nefarious might be afoot", it took no further action.

    The CIA had already been alerted by Saudi intelligence about the status of Mihdhar and Hazmi as Al-Qaeda members and a CIA team broke into Mihdhar's Dubai hotel room and discovered that Mihdhar had a U.S. visa. While Alec Station alerted intelligence agencies worldwide about this fact, it did not share this information with the FBI. The Malaysian Special Branch observed the January 5, 2000, meeting of the two Al-Qaeda members and informed the CIA that Mihdhar, Hazmi, and Khallad were flying to Bangkok, but the CIA never notified other agencies of this, nor did it ask the State Department to put Mihdhar on its watchlist. An FBI liaison to Alec Station asked permission to inform the FBI of the meeting but was told: "This is not a matter for the FBI".[98]

    By late June, senior counter-terrorism official Richard Clarke and CIA director George Tenet were "convinced that a major series of attacks was about to come", although the CIA believed the attacks would likely occur in Saudi Arabia or Israel.[99] In early July, Clarke put domestic agencies on "full alert", telling them, "Something spectacular is going to happen here, and it's going to happen soon". He asked the FBI and the State Department to alert the embassies and police departments, and the Defense Department to go to "Threat Condition Delta".[100][101] Clarke later wrote: "Somewhere in CIA there was information that two known al Qaeda terrorists had come into the United States. Somewhere in the FBI, there was information that strange things had been going on at flight schools in the United States ... They had specific information about individual terrorists from which one could have deduced what was about to happen. None of that information got to me or the White House".[102]

    [...] by July [2001], with word spreading of a coming attack, a schism emerged among the senior leadership of al Qaeda. Several senior members reportedly agreed with Mullah Omar. Those who reportedly sided with bin Ladin included Atef, Sulayman Abu Ghayth, and KSM. But those said to have opposed him were weighty figures in the organization-including Abu Hafs the Mauritanian, Sheikh Saeed al Masri, and Sayf al Adl. One senior al Qaeda operative claims to recall Bin Ladin arguing that attacks against the United States needed to be carried out immediately to support insurgency in the Israeli-occupied territories and protest the presence of U.S. forces in Saudi Arabia.
    — 9/11 Commission Report, pp. 251[103]
    On July 13, Tom Wilshire, a CIA agent assigned to the FBI's international terrorism division, emailed his superiors at the CIA's Counterterrorism Center (CTC) requesting permission to inform the FBI that Hazmi was in the country and that Mihdhar had a U.S. visa. The CIA never responded.[104]

    The same day in July, Margarette Gillespie, an FBI analyst working in the CTC, was told to review material about the Malaysia meeting. She was not told of the participant's presence in the U.S. The CIA gave Gillespie surveillance photos of Mihdhar and Hazmi from the meeting to show to FBI counterterrorism but did not tell her their significance. The Intelink database informed her not to share intelligence material at the meeting with criminal investigators. When shown the photos, the FBI refused more details on their significance, and they were not given Mihdhar's date of birth or passport number.[105] In late August 2001, Gillespie told the INS, the State Department, the Customs Service, and the FBI to put Hazmi and Mihdhar on their watchlists, but the FBI was prohibited from using criminal agents in searching for the duo, hindering their efforts.[106]

    Also in July, a Phoenix-based FBI agent sent a message to FBI headquarters, Alec Station, and FBI agents in New York alerting them to "the possibility of a coordinated effort by Osama bin Laden to send students to the United States to attend civil aviation universities and colleges". The agent, Kenneth Williams, suggested the need to interview all flight school managers and identify all Arab students seeking flight training.[107] In July, Jordan alerted the U.S. that Al-Qaeda was planning an attack on the U.S.; "months later", Jordan notified the U.S. that the attack's codename was "The Big Wedding" and that it involved aeroplanes.[108]

    On August 6, 2001, the CIA's Presidential Daily Brief ("PDB"), designated "For the President Only", was entitled Bin Ladin Determined to Strike in US. The memo noted that FBI information "indicates patterns of suspicious activity in this country consistent with preparations for hijackings or other types of attacks".[109]

    In mid-August, one Minnesota flight school alerted the FBI about Zacarias Moussaoui, who had asked "suspicious questions". The FBI found that Moussaoui was a radical who had travelled to Pakistan, and the INS arrested him for overstaying his French visa. Their request to search his laptop was denied by FBI headquarters due to the lack of probable cause.[110]

    The failures in intelligence-sharing were attributed to 1995 Justice Department policies limiting intelligence-sharing, combined with CIA and NSA reluctance to reveal "sensitive sources and methods" such as tapped phones.[111] Testifying before the 9/11 Commission in April 2004, then – Attorney General John Ashcroft recalled that the "single greatest structural cause for the September 11th problem was the wall that segregated or separated criminal investigators and intelligence agents".[112] Clarke also wrote: "[T]here were... failures to get information to the right place at the right time".[113]

    Attacks
    For a chronological guide, see Timeline for the day of the September 11 attacks.
    Early on the morning of Tuesday, September 11, 2001, nineteen hijackers took control of four commercial airliners (two Boeing 757s and two Boeing 767s) en route to California after takeoffs from Logan International Airport in Boston, Massachusetts; Newark Liberty International Airport in Newark, New Jersey; and Washington Dulles International Airport in Loudoun and Fairfax counties in Virginia.[114] Large planes with long coast-to-coast flights were selected for hijacking because they would have more fuel.[115]

    Key info about the four flights
    Operator
    Flight number
    Aircraft type
    Time of departure*
    Time of crash*
    Departed from
    En route to
    Crash site
    Fatalities
    (There were no survivors from the flights)
    Crew
    Passengers†
    Ground§
    Hijackers
    Total‡
    American Airlines
    11
    Boeing 767-223ER
    7:59 a.m.
    8:46 a.m.
    Logan International Airport
    Los Angeles International Airport
    North Tower of the World Trade Center, floors 93 to 99
    11
    76
    2,606
    5
    2,763
    United Airlines
    175
    Boeing 767–222
    8:14 a.m.
    9:03 a.m.[g]
    Logan International Airport
    Los Angeles International Airport
    South Tower of the World Trade Center, floors 77 to 85
    9
    51
    5
    American Airlines
    77
    Boeing 757–223
    8:20 a.m.
    9:37 a.m.
    Washington Dulles International Airport
    Los Angeles International Airport
    West wall of Pentagon
    6
    53
    125
    5
    189
    United Airlines
    93
    Boeing 757–222
    8:42 a.m.
    10:03 a.m.
    Newark Int'l Airport
    San Francisco International Airport
    Field in Stonycreek Township near Shanksville
    7
    33
    0
    4
    44
    Totals
    33
    213
    2,731
    19
    2,996
    * Eastern Daylight Time (UTC−04:00)
    † Excluding hijackers
    § Including emergency workers
    ‡ Including hijackers

    The four crashes
    See also: Media documentation of the September 11 attacks
    Duration: 52 seconds.0:52
    United Airlines Flight 175 crashes into 2 World Trade Center
    At 7:59 a.m., American Airlines Flight 11 took off from Logan International Airport in Boston.[116] Fifteen minutes into the flight, five hijackers armed with boxcutters took over the plane, injuring at least three people (and possibly killing one)[117][118][119] before forcing their way into the cockpit. The terrorists also displayed an apparent explosive and sprayed mace into the cabin, to frighten the hostages into submission and further hinder resistance.[120] Back at Logan, United Airlines Flight 175 took off at 8:14 a.m., approximately the same time as Flight 11's hijacking.[121] Hundreds of miles southwest at Dulles International Airport, American Airlines Flight 77 left the runway at 8:20 a.m.[121] Flight 175's journey proceeded normally for 28 minutes until 8:42 a.m., when a group of five hijacked the plane, murdering both pilots and stabbing several crew members before assuming control of the aircraft. These hijackers also used bomb threats to instil fear into the passengers and crew,[122] also spraying chemical weapons to disable any opposition.[123] Concurrently, United Airlines Flight 93 departed from Newark International Airport in New Jersey;[121] originally scheduled to pull away from the gate at 8:00 a.m., the plane was running 42 minutes late.

    At 8:46 a.m., Flight 11 was deliberately crashed into the north face of the World Trade Center's North Tower (1 WTC),[124] although the initial presumption by many was that this was merely an accident.[125] At 8:51 a.m., American Airlines Flight 77 was also taken over by another group of five who forcibly entered the cockpit 31 minutes after takeoff.[126] Although the hijackers on this flight were equipped with knives,[127] there were no reports of anyone on board being stabbed, nor did the two people who made phone calls mention the use of mace or a bomb threat.

    Seventeen minutes after the first plane crashed into the North Tower, Flight 175 was flown into the South Tower's southern facade (2 WTC)[128] at 9:03 a.m.,[g] demonstrating that the first crash was not an accident, but rather a terrorist attack.[129][130]

    Four men aboard Flight 93 struck suddenly, killing at least one passenger, after having waited 46 minutes to make their move—a holdup that proved disastrous for the terrorists when combined with the delayed takeoff from the runway;[131] they stormed the cockpit and seized control of the plane at 9:28 a.m., turning the plane eastbound and setting course for Washington, D.C.[132] Much like their counterparts on the first two flights, the fourth team also used bomb threats and filled the cabin with mace.[133]

    Nine minutes after Flight 93's hijacking, Flight 77 crashed into the west side of the Pentagon.[134] Because of the two delays,[135] the passengers and crew of Flight 93 had time to be made aware of the previous attacks through phone calls to the ground, and as a result an uprising was hastily organized to take control of the aircraft at 9:57 a.m.[136] Within minutes, passengers had fought their way to the front of the cabin and began breaking down the cockpit door. Fearing their captives would gain the upper hand, the hijackers rolled the plane and pitched it into a nosedive,[137][138] crashing into a field near Shanksville, Pennsylvania, southeast of Pittsburgh, at 10:03 a.m. The plane was about twenty minutes away from reaching D.C. at the time of the crash, and its target is believed to have been either the Capitol Building or the White House.[115][136]

    Some passengers and crew members who called from the aircraft using the cabin air phone service and mobile phones provided details: several hijackers were aboard each plane; they used mace, tear gas, or pepper spray to overcome attendants; and some people aboard had been stabbed.[139] Reports indicated hijackers stabbed and killed pilots, flight attendants, and one or more passengers.[114][140] According to the 9/11 Commission's final report, the hijackers had recently purchased multi-function hand tools and assorted Leatherman-type utility knives with locking blades (which were not forbidden to passengers at the time), but these were not found among the possessions left behind by the hijackers.[141][142] A flight attendant on Flight 11, a passenger on Flight 175, and passengers on Flight 93 said the hijackers had bombs, but one of the passengers said he thought the bombs were fake. The FBI found no traces of explosives at the crash sites, and the 9/11 Commission concluded that the bombs were probably fake.[114] On at least two of the hijacked flights—American 11 and United 93—the terrorists claimed over the PA system that they were taking hostages and were returning to the airport to have a ransom demand met, a clear attempt to prevent passengers from fighting back. Both attempts failed, however, as both hijacker pilots in these instances (Mohamed Atta[143] and Ziad Jarrah,[144] respectively) keyed the wrong switch and mistakenly transmitted their messages to ATC instead of the people on the plane as intended, tipping off the flight controllers that the planes had been hijacked.

     Duration: 3 minutes and 12 seconds.3:12Security camera footage of American Airlines Flight 77 crashing into the Pentagon;[145] the plane collides with The Pentagon approximately 86 seconds after the start of the recording
    Three buildings in the World Trade Center collapsed due to fire-induced structural failure. Although the South Tower was struck 17 minutes after the North Tower, the plane's impact zone was far lower, at a much faster speed, and into a corner, with the unevenly-balanced additional structural weight causing it to collapse first at 9:59 a.m.,[146]: 80 [147]: 322  having burned for 56 minutes[i] in the fire caused by the crash of United Airlines Flight 175 and the explosion of its fuel. The North Tower lasted another 29 minutes before collapsing at 10:28 a.m.,[j] one hour and forty-two minutes[h] after being struck by American Airlines Flight 11. When the North Tower collapsed, debris fell on the nearby 7 World Trade Center building (7 WTC), damaging the building and starting fires. These fires burned for nearly seven hours, compromising the building's structural integrity, and 7 WTC collapsed at 5:21 p.m.[151][152] The west side of the Pentagon sustained significant damage.

    At 9:42 a.m., the Federal Aviation Administration (FAA) grounded all civilian aircraft within the continental U.S., and civilian aircraft already in flight were told to land immediately.[153] All international civilian aircraft were either turned back or redirected to airports in Canada or Mexico, and were banned from landing on United States territory for three days.[154] The attacks created widespread confusion among news organizations and air traffic controllers. Among unconfirmed and often contradictory news reports aired throughout the day, one of the most prevalent claimed a car bomb had been detonated at the U.S. State Department's headquarters in Washington, D.C.[155] Another jet (Delta Air Lines Flight 1989) was suspected of having been hijacked, but the aircraft responded to controllers and landed safely in Cleveland, Ohio.[156]

    In an April 2002 interview, Khalid Sheikh Mohammed and Ramzi bin al-Shibh, who are believed to have organized the attacks, said Flight 93's intended target was the United States Capitol, not the White House.[157] During the planning stage of the attacks, Mohamed Atta (Flight 11's hijacker and pilot) thought the White House might be too tough a target and sought an assessment from Hani Hanjour (who hijacked and piloted Flight 77).[158] Mohammed said Al-Qaeda initially planned to target nuclear installations rather than the World Trade Center and the Pentagon, but decided against it, fearing things could "get out of control".[159] Final decisions on targets, according to Mohammed, were left in the hands of the pilots.[158] If any pilot could not reach his intended target, he was to crash the plane.[115]

    Casualties
    Main articles: Casualties of the September 11 attacks and Lists of victims of the September 11 attacks
     One of three observable falls from the South Tower.[160] A similar photograph of a victim from the North Tower titled The Falling Man gained wide acclamation.
    The attack on the World Trade Center's North Tower single-handedly[k] made 9/11 the deadliest act of terrorism in world history.[162] Taken together, the four crashes caused the deaths of 2,996 people (including the hijackers) and injured thousands more.[163] The death toll included 265 on the four planes (from which there were no survivors); 2,606 in the World Trade Center and in the surrounding area; and 125 at The Pentagon.[164][165] Most who died were civilians, as well as 343 firefighters, 72 law enforcement officers, 55 military personnel, and the 19 terrorists.[166][167] After New York, New Jersey lost the most state citizens.[168] More than 90 countries lost citizens in the attacks.[169]

    In New York City, more than 90% of the workers and visitors who died in the towers had been at or above the points of impact. In the North Tower, between 1,344[170] and 1,402[171] people were at, above or one floor below the point of impact and all died. Hundreds were killed instantly the moment the plane struck.[172] The estimated 800 people[173] who survived the impact were trapped and died in the fires or from smoke inhalation; fell or jumped from the tower to escape the smoke and flames; or were killed in the building's collapse. The destruction of all three staircases in the North Tower when Flight 11 hit made it impossible for anyone from the impact zone upward to escape. 107 people not trapped by the impact died.[174] When the plane struck between floors 93 and 99, the 92nd floor was also rendered inescapable when the crash severed all elevator shafts while debris falling from the impact zone blocked the stairwells, ensuring the deaths of all 69 workers on the floor below the point of impact.

    In the South Tower, around 600 people were on or above the 77th floor when Flight 175 struck and few survived. As with the North Tower, hundreds were killed at the moment of impact. Unlike those in the North Tower, the estimated 300 survivors[173] of the crash were not technically trapped by the damage done by Flight 175's impact, but most were either unaware that a means of escape still existed or were unable to use it. One stairway, Stairwell A, narrowly avoided being destroyed as Flight 175 crashed through the building, allowing 14 people located on the floors of impact (including Stanley Praimnath, a man who saw the plane coming at him) and four more from the floors above to escape. New York City 9-1-1 operators who received calls from people inside the tower were not well informed of the situation as it rapidly unfolded and as a result, told callers not to descend the tower on their own.[175] In total, 630 people died in the South Tower, fewer than half the number killed in the North Tower.[174] Of the 100–200 people witnessed jumping or falling to their deaths that morning,[176] only three recorded sightings were from the South Tower.[177]: 86  Casualties in the South Tower were significantly reduced because some occupants decided to leave the building immediately following the first crash, and because Eric Eisenberg, an executive at AON Insurance, made the decision to evacuate the floors occupied by AON (floors 92 and 98–105) in the moments following the impact of Flight 11. The 17-minute gap allowed over 900 of the 1,100 AON employees present on-site to evacuate from above the 77th floor before the South Tower was struck; Eisenberg was among the nearly 200 who did not escape. Similar pre-impact evacuations were carried out by companies such as Fiduciary Trust, CSC, and Euro Brokers, all of whom had offices on floors above the point of impact. The failure to order a full evacuation of the South Tower after the first plane crash into the North Tower was described by USA Today as "one of the day's great tragedies".[178]

    As exemplified in the photograph The Falling Man, more than 200 people fell to their deaths from the burning towers, most of whom were forced to jump to escape the extreme heat, fire and smoke.[179] Some occupants of each tower above the point of impact made their way toward the roof in the hope of helicopter rescue, but the roof access doors were locked.[180] No plan existed for helicopter rescues, and the combination of roof equipment, thick smoke and intense heat prevented helicopters from approaching.[181]

    At the World Trade Center complex, a total of 414 emergency workers died as they tried to rescue people and fight fires, while another law enforcement officer was separately killed when United 93 crashed. The New York City Fire Department (FDNY) lost 343 firefighters, including a chaplain and two paramedics.[182][183][184] The New York City Police Department (NYPD) lost 23 officers.[185] The Port Authority Police Department (PAPD) lost 37 officers.[186] Eight emergency medical technicians (EMTs) and paramedics from private emergency medical services (EMS) units were killed.[187] Almost all of the emergency personnel who died at the scene that day were killed as a result of the towers collapsing, with the exception of one who was struck by a civilian falling from the upper floors of the South Tower.[188]

    Cantor Fitzgerald L.P. (an investment bank on the North Tower's 101st–105th floors) lost 658 employees, considerably more than any other employer.[189] Marsh Inc., located immediately below Cantor Fitzgerald on floors 93–100, lost 358 employees,[190][191] and 175 employees of Aon Corporation were also killed.[192] The National Institute of Standards and Technology (NIST) estimated that about 17,400 civilians were in the World Trade Center complex at the time of the attacks. Turnstile counts from the Port Authority suggest 14,154 people were typically in the Twin Towers by 8:45 a.m.[193][page needed][194] Most people below the impact zone safely evacuated the buildings.[195]

    In Arlington County, Virginia, 125 Pentagon workers died when Flight 77 crashed into the building's western side. 70 were civilians and 55 were military personnel, many of whom worked for the United States Army or the United States Navy. The Army lost 47 civilian employees; six civilian contractors; and 22 soldiers, while the Navy lost six civilian employees; three civilian contractors; and 33 sailors. Seven Defense Intelligence Agency (DIA) civilian employees died, and one Office of the Secretary of Defense (OSD) contractor.[196][197][198] Lieutenant General Timothy Maude, an Army Deputy Chief of Staff, was the highest-ranking military official killed at the Pentagon.[199]

    Weeks after the attack, the death toll was estimated to be over 6,000, more than twice the number of deaths eventually confirmed.[200] The city was only able to identify remains for about 1,600 of the World Trade Center victims. The medical examiner's office collected "about 10,000 unidentified bone and tissue fragments that cannot be matched to the list of the dead".[201] Bone fragments were still being found in 2006 by workers who were preparing to demolish the damaged Deutsche Bank Building.

    In 2010, a team of anthropologists and archaeologists searched for human remains and personal items at the Fresh Kills Landfill, where 72 more human remains were recovered, bringing the total found to 1,845. DNA profiling continues in an attempt to identify additional victims.[202][203][204] The remains are being held in storage in Memorial Park, outside the New York City Medical Examiner's facilities. It was expected that the remains would be moved in 2013 to a repository behind a wall at the 9/11 museum.[needs update][205]

    In July 2011, a team of scientists at the Office of Chief Medical Examiner continued efforts to identify remains, in the hope that improved technology will allow them to identify other victims.[204] In August 2017, the 1,641st victim was identified as a result of newly available DNA technology,[206] and a 1,642nd during July 2018.[207] Three more victims were identified in October 2019,[208] two in September 2021[209] and an additional two in September 2023.[210] As of September 2023, 1,104 victims remain unidentified,[210] amounting to 40% of the deaths in the World Trade Center attacks.[209] On September 25, 2023, the FDNY reported that with the death of EMT Hilda Vannata and retired firefighter Robert Fulco, marking the 342nd and 343rd deaths from 9/11-related illnesses, the department had now lost the same number of firefighters, EMTs, and civilian members to 9/11-related illnesses as it did on the day of the attacks.[211][212]

    Damage
    Further information: Collapse of the World Trade Center
     The World Trade Center site, called Ground Zero, with an overlay showing the original buildings' locations
    Along with the 110-floor Twin Towers, numerous other buildings at the World Trade Center site were destroyed or badly damaged, including WTC buildings 3 through 7 and St. Nicholas Greek Orthodox Church.[213] The North Tower, South Tower, the Marriott Hotel (3 WTC), and 7 WTC were destroyed. The U.S. Customs House (6 World Trade Center), 4 World Trade Center, 5 World Trade Center, and both pedestrian bridges connecting buildings were severely damaged. The Deutsche Bank Building (still popularly referred to as the Bankers Trust Building) on 130 Liberty Street was partially damaged and demolished some years later, starting in 2007.[214][215] The two buildings of the World Financial Center also suffered damage.[214] The last fires at the World Trade Center site were extinguished on December 20, exactly 100 days after the attacks.[216]

    The Deutsche Bank Building across Liberty Street from the World Trade Center complex was later condemned as uninhabitable because of toxic conditions inside the office tower and was deconstructed.[217][218] The Borough of Manhattan Community College's Fiterman Hall at 30 West Broadway was condemned due to extensive damage from the attacks, and then reopened in 2012.[219]

    Other neighbouring buildings (including 90 West Street and the Verizon Building) suffered major damage but have been restored.[220] World Financial Center buildings, One Liberty Plaza, the Millenium Hilton, and 90 Church Street had moderate damage and have since been restored.[221] Communications equipment on top of the North Tower was also destroyed, with only WCBS-TV maintaining a backup transmitter on the Empire State Building, but media stations were quickly able to reroute the signals and resume their broadcasts.[213][222]

     A September 14 aerial view of the Pentagon during cleanup operations
    The PATH train system's World Trade Center station was located under the complex. As a result, the station was demolished when the towers collapsed, and the tunnels leading to Exchange Place station in Jersey City, New Jersey, were flooded with water.[223] The station was rebuilt as the $4 billion World Trade Center Transportation Hub, which reopened in March 2015.[224][225] The Cortlandt Street station on the New York City Subway's IRT Broadway–Seventh Avenue Line was also in close proximity to the World Trade Center complex, and the entire station, along with the surrounding track, was reduced to rubble.[226] The latter station was rebuilt and reopened to the public on September 8, 2018.[227] The Pentagon was extensively damaged by the impact of American Airlines Flight 77 and the ensuing fires, causing one section of the building to collapse.[228] As the aeroplane approached the Pentagon, its wings knocked down light poles and its right engine hit a power generator before crashing into the western side of the building.[229][230] The plane hit the Pentagon at the first-floor level. The front part of the fuselage disintegrated on impact, while the mid and tail sections kept moving for another fraction of a second.[231] Debris from the tail section penetrated the furthest into the building, breaking through 310 feet (94 m) of the three outermost of the building's five rings.[231][232]

    Rescue efforts
    Main article: Rescue and recovery effort after the September 11 attacks on the World Trade Center
    See also: List of emergency and first responder agencies that responded to the September 11 attacks
     Patrol Boat Hocking of the U.S. Army Corps of Engineers on its way to assist the site on September 11, 2001
    The New York City Fire Department (FDNY) deployed more than 200 units (approximately half of the department) to the World Trade Center.[233] Their efforts were supplemented by numerous off-duty firefighters and emergency medical technicians.[234][233][235] The New York City Police Department (NYPD) sent its Emergency Service Units and other police personnel and deployed its aviation unit.[236] The NYPD aviation unit assessed the situation and decided that helicopter rescues from the towers were not feasible.[237] Numerous police officers of the Port Authority Police Department (PAPD) also participated in rescue efforts.[238] Once on the scene, the FDNY, the NYPD, and the PAPD did not coordinate efforts and performed redundant searches for civilians.[234][239]

    As conditions deteriorated, the NYPD aviation unit relayed information to police commanders, who issued orders for personnel to evacuate the towers; most NYPD officers were able to safely evacuate before the buildings collapsed.[239][240] With separate command posts set up and incompatible radio communications between the agencies, warnings were not passed along to FDNY commanders.[241]

    After the first tower collapsed, FDNY commanders issued evacuation warnings. Due to technical difficulties with malfunctioning radio repeater systems, many firefighters never heard the evacuation orders. 9-1-1 dispatchers also received information from callers that was not passed along to commanders on the scene.[233]

    Reactions
    Main article: Reactions to the September 11 attacks
    See also: Timeline for September following the September 11 attacks
    The 9/11 attacks resulted in immediate responses to the event, including domestic reactions; closings and cancellations; hate crimes; Muslim-American responses to the event; international responses to the attack; and military responses to the events. Shortly after the attacks, a U.S. government fund that was created by an Act of Congress named the September 11th Victim Compensation Fund.[242][243] The purpose of the fund was to compensate the victims of the attacks and their families with the quid pro quo of their agreement not to file lawsuits against the airline corporations involved.[244] Legislation authorizes the fund to disburse a maximum of $7.375 billion, including operational and administrative costs, of U.S. government funds.[245] The fund was set to expire by 2020 but was in 2019 prolonged to allow claims to be filed until October 2090.[246][247]

    Immediate response
    Further information: U.S. military response during the September 11 attacks
    See also: Communication during the September 11 attacks
     President George W. Bush is briefed in Sarasota, Florida, where he learned of the attacks unfolding while visiting Emma E. Booker Elementary School.
     Eight hours after the attacks, U.S. Secretary of Defense Donald Rumsfeld declares "The Pentagon is functioning"
    At 8:32 a.m., FAA officials were notified Flight 11 had been hijacked and they, in turn, notified the North American Aerospace Defense Command (NORAD). NORAD scrambled two F-15s from Otis Air National Guard Base in Massachusetts and they were airborne by 8:53 a.m. Because of slow and confused communication from FAA officials, NORAD had nine minutes' notice, and no notice about any of the other flights before they crashed.

    After both of the Twin Towers had already been hit, more fighters were scrambled from Langley Air Force Base in Virginia at 9:30 a.m.[248] At 10:20 a.m., Vice President Dick Cheney issued orders to shoot down any commercial aircraft that could be positively identified as being hijacked. These instructions were not relayed in time for the fighters to take action.[248][249][250] Some fighters took to the air without live ammunition, knowing that to prevent the hijackers from striking their intended targets, the pilots might have to intercept and crash their fighters into the hijacked planes, possibly ejecting at the last moment.[251]

    For the first time in U.S. history, the emergency preparedness plan called Security Control of Air Traffic and Air Navigation Aids (SCATANA) was invoked,[252] thus stranding tens of thousands of passengers across the world.[253] Ben Sliney, in his first day as the National Operations Manager of the FAA,[254] ordered that American airspace would be closed to all international flights, causing about 500 flights to be turned back or redirected to other countries. Canada received 226 of the diverted flights and launched Operation Yellow Ribbon to deal with the large numbers of grounded planes and stranded passengers.[255]

    The 9/11 attacks had immediate effects on the American people.[256] Police and rescue workers from around the country took a leave of absence from their jobs and travelled to New York City to help recover bodies from the twisted remnants of the Twin Towers.[257] Blood donations across the U.S. surged in the weeks after 9/11.[258][259]

    The deaths of adults in the attacks resulted in over 3,000 children losing a parent.[260] Subsequent studies documented children's reactions to these actual losses and feared losses of life, the protective environment in the attacks' aftermath, and the effects on surviving caregivers.[261][262][263]

    Domestic reactions
    Further information: U.S. government response to the September 11 attacks
     
    President Bush addressing the nation from the White House at 8:30 PM ET
     
    Bush speaking to rescue workers at Ground Zero on September 14
     
    Duration: 34 minutes and 18 seconds.34:18
    During a speech to a joint session of Congress, President George W. Bush pledges "to defend freedom against terrorism". September 20, 2001 (audio only).
    Following the attacks, President George W. Bush's approval rating increased to 90%.[264] On September 20, 2001, he addressed the nation and a joint session of Congress regarding the events of September 11 and the subsequent nine days of rescue and recovery efforts, and described his intended response to the attacks. New York City mayor Rudy Giuliani's highly visible role resulted in praise in New York and nationally.[265]

    Many relief funds were immediately set up to assist the attacks' victims, with the task of providing financial assistance to the survivors of the attacks and the victims' families. By the deadline for victims' compensation on September 11, 2003, 2,833 applications had been received from the families of those who were killed.[266]

    Contingency plans for the continuity of government and the evacuation of leaders were implemented soon after the attacks.[253] Congress was not told that the United States had been under a continuity of government status until February 2002.[267]

    In the largest restructuring of the U.S. government in contemporary history, the United States enacted the Homeland Security Act of 2002, creating the U.S. Department of Homeland Security. Congress also passed the USA PATRIOT Act, saying it would help detect and prosecute terrorism and other crimes.[268] Civil liberties groups have criticized the PATRIOT Act, saying it allows law enforcement to invade citizens' privacy and that it eliminates judicial oversight of law enforcement and domestic intelligence.[269][270][271]

    To effectively combat future acts of terrorism, the National Security Agency (NSA) was given broad powers. NSA commenced warrantless surveillance of telecommunications, which was sometimes criticized as permitting the agency "to eavesdrop on telephone and e-mail communications between the United States and people overseas without a warrant".[272] In response to requests by various intelligence agencies, the United States Foreign Intelligence Surveillance Court permitted an expansion of powers by the U.S. government in seeking, obtaining, and sharing information on U.S. citizens as well as non-U.S. people from around the world.[273]

    Hate crimes
    See also: Islamophobic incidents and Persecution of Muslims
    Six days after the attacks, President Bush made a public appearance at Washington, D.C.'s largest Islamic Center and acknowledged the "incredibly valuable contribution" that millions of American Muslims made to their country and called for them "to be treated with respect".[274] Numerous incidents of harassment and hate crimes against Muslims and South Asians were reported in the days following the attacks.[275][276][277]

    Sikhs were also subject to targeting due to the use of turbans in the Sikh faith, which are stereotypically associated with Muslims. There were reports of attacks on mosques and other religious buildings (including the firebombing of a Hindu temple), and assaults on individuals, including one murder: Balbir Singh Sodhi, a Sikh mistaken for a Muslim, who was fatally shot on September 15, 2001, in Mesa, Arizona.[277] Two dozen members of Osama bin Laden's family were urgently evacuated out of the country on a private charter plane under FBI supervision three days after the attacks.[278]

    According to an academic study, people perceived to be Middle Eastern were as likely to be victims of hate crimes as followers of Islam during this time. The study also found a similar increase in hate crimes against people who may have been perceived as Muslims, Arabs, and others thought to be of Middle Eastern origin.[279] A report by the South Asian American advocacy group known as South Asian Americans Leading Together documented media coverage of 645 bias incidents against Americans of South Asian or Middle Eastern descent between September 11 and 17, 2001. Various crimes such as vandalism, arson, assault, shootings, harassment, and threats in numerous places were documented.[280][281] Women wearing hijab were also targeted.[282]

    Discrimination and racial profiling
    Further information: Detentions following the September 11 attacks, Islamophobia in the United States, and Flying while Muslim
    See also: Airport racial profiling in the United States
    A poll of Arab-Americans, conducted in May 2002, found that 20% had personally experienced discrimination since September 11. A July 2002 poll of Muslim Americans found that 48% believed their lives had changed for the worse since September 11, and 57% had experienced an act of bias or discrimination.[282]

    Following the September 11 attacks, many Pakistani Americans identified themselves as Indians to avoid potential discrimination and obtain jobs (Pakistan was created as a result of the partition of India in 1947).[283]

    By May 2002, there were 488 complaints of employment discrimination reported to the U.S. Equal Employment Opportunity Commission (EEOC). 301 of those were complaints from people fired from their jobs. Similarly, by June 2002, the U.S. Department of Transportation (DOT) had investigated 111 September 11th-related complaints from airline passengers purporting that their religious or ethnic appearance caused them to be singled out at security screenings. DOT investigated an additional 31 complaints from people who alleged they were completely blocked from boarding aeroplanes on the same grounds.[282]

    Muslim American response
    See also: Muslim attitudes towards terrorism and Peace in Islamic philosophy
    Muslim organizations in the United States were swift to condemn the attacks and called "upon Muslim Americans to come forward with their skills and resources to help alleviate the sufferings of the affected people and their families".[284] These organizations included the Islamic Society of North America, American Muslim Alliance, American Muslim Council, Council on American-Islamic Relations, Islamic Circle of North America, and the Shari'a Scholars Association of North America. Along with monetary donations, many Islamic organizations launched blood drives and provided medical assistance, food, and shelter for victims.[285][286][287]

    Interfaith efforts
    Curiosity about Islam increased after the attacks. As a result, many mosques and Islamic centres began holding open houses and participating in outreach efforts to educate non-Muslims about the faith. In the first 10 years after the attacks, interfaith community service increased from 8 to 20 percent and the percentage of U.S. congregations involved in interfaith worship doubled from 7 to 14 percent.[288]

    International reactions
     President of Russia Vladimir Putin (right) with his wife (center) at a commemoration service in New York City on November 16
    The attacks were denounced by mass media and governments worldwide. Across the globe, nations offered pro-American support and solidarity.[289] Leaders in most Middle Eastern countries, as well as Libya and Afghanistan, condemned the attacks. Iraq was a notable exception, with an immediate official statement that "the American cowboys are reaping the fruit of their crimes against humanity".[290] The government of Saudi Arabia officially condemned the attacks, but privately many Saudis favored bin Laden's cause.[291][292]

    Although Palestinian Authority (PA) president Yasser Arafat also condemned the attacks, there were reports of celebrations of disputed size in the West Bank, Gaza Strip, and East Jerusalem.[293][294] Palestinian leaders discredited news broadcasters that justified the attacks or showed celebrations,[295] and the Authority claimed such celebrations do not represent the Palestinians' sentiment, adding that it would not allow "a few kids" to "smear the real face of the Palestinians".[296][297] Footage by CNN[vague] and other news outlets were suggested by a report originating at a Brazilian university to be from 1991; this was later proven to be a false accusation, resulting in a statement being issued by CNN.[298][299] As in the United States, the aftermath of the attacks saw tensions increase in other countries between Muslims and non-Muslims.[300]

    United Nations Security Council Resolution 1368 condemned the attacks and expressed readiness to take all necessary steps to respond and combat all forms of terrorism in accordance with their Charter.[301] Numerous countries introduced anti-terrorism legislation and froze bank accounts they suspected of Al-Qaeda ties.[302][303] Law enforcement and intelligence agencies in a number of countries arrested alleged terrorists.[304][305]

    British Prime Minister Tony Blair said Britain stood "shoulder to shoulder" with the United States.[306] A few days later, Blair flew to Washington, D.C., to affirm British solidarity with the United States. In a speech to Congress nine days after the attacks, which Blair attended as a guest, President Bush declared "America has no truer friend than Great Britain".[307] Subsequently, Prime Minister Blair embarked on two months of diplomacy to rally international support for military action; he held 54 meetings with world leaders and travelled more than 40,000 miles (60,000 km).[308]

    The U.S. set up the Guantanamo Bay detention camp to hold inmates they defined as "illegal enemy combatants". The legitimacy of these detentions has been questioned by the European Union and human rights organizations.[309][310][311]

    On September 25, 2001, Iran's fifth president, Mohammad Khatami, meeting British Foreign Secretary Jack Straw, said: "Iran fully understands the feelings of the Americans about the terrorist attacks in New York and Washington on September 11". He said although the American administrations had been at best indifferent about terrorist operations in Iran (since 1979), the Iranians felt differently and had expressed their sympathetic feelings with bereaved Americans in the tragic incidents in the two cities. He also stated that "Nations should not be punished in place of terrorists".[312]

    According to Radio Farda's website, when the news of the attacks was released, some Iranian citizens gathered in front of the Embassy of Switzerland in Tehran, which serves as the protecting power of the United States in Iran (U.S. interests-protecting office in Iran), to express their sympathy, and some of them lit candles as a symbol of mourning. This piece of news on Radio Farda's website also states that in 2011, on the anniversary of the attacks, the United States Department of State published a post on its blog, in which the Department thanked the Iranian people for their sympathy and stated that it would never forget Iranian people's kindness on those harsh days.[313] After the attacks, both the President[314][315] and the Supreme Leader of Iran, condemned the attacks. The BBC and Time magazine published reports on holding candlelit vigils for the victims of Iranian citizens on their websites.[316][317] According to Politico Magazine, following the attacks, Ali Khamenei, the Supreme Leader of Iran, "suspended the usual 'Death to America' chants at Friday prayers" temporarily.[318]

    In September 2001, shortly after the attacks, some fans of AEK Athens burned an Israeli flag and unsuccessfully tried to burn an American flag. Though the American flag did not catch fire, the fans booed during a moment of silence for victims of the attacks.[319]

    Military operations
    Further information: War on terror and US invasion of Afghanistan
    Events leading up
    to the Iraq War
     
    14 July Revolution 1958
    Iraqi–Kurdish conflict 1961–1991
    17 July Revolution 1968
    Iranian Revolution 1978–1979
    Ba'ath Party Purge 1979
    Iran–Iraq War 1980–1988
    Iraqgate 1982–c.1990
    Iraqi invasion of Kuwait 1990
    Gulf War 1990–1991
    Sanctions against Iraq 1990–2003
    Iraqi uprisings 1991
    Iraqi no-fly zones conflict 1991–2003
    Iraq disarmament crisis 1991–2003
    Arms-to-Iraq affair 1992–1996
    September 11 attacks 2001
    U.S. anthrax attacks 2001
    U.S. invasion of Afghanistan 2001
    Alleged Prague connection 2001
    Iraq Resolution 2002
    Wood Green ricin plot 2003
    Colin Powell's UN presentation 2003
    v
    t
    e
    At 2:40 p.m. on September 11, Secretary of Defense Donald Rumsfeld was issuing rapid orders to his aides to look for evidence of Iraqi involvement. According to notes taken by senior policy official Stephen Cambone, Rumsfeld asked for, "Best info fast. Judge whether they are good enough to hit S.H. [Saddam Hussein] at the same time. Not only UBL" [Osama bin Laden].[320] Cambone's notes quoted Rumsfeld as saying, "Need to move swiftly – Near term target needs – go massive – sweep it all up. Things related and not".[321][322]

    In a meeting at Camp David on September 15 the Bush administration rejected the idea of attacking Iraq in response to the September 11 attacks.[323] Nonetheless, they later invaded the country with allies, citing "Saddam Hussein's support for terrorism".[324] At the time, as many as seven in ten Americans believed the Iraqi president played a role in the 9/11 attacks.[325] Three years later, Bush conceded that he had not.[326]

    The NATO council declared that the terrorist attacks on the United States were an attack on all NATO nations that satisfied Article 5 of the NATO charter. This marked the first invocation of Article 5, which had been written during the Cold War with an attack by the Soviet Union in mind.[327] Australian Prime Minister John Howard, who was in Washington, D.C., during the attacks, invoked Article IV of the ANZUS treaty.[328] The Bush administration announced a war on terror, with the stated goals of bringing bin Laden and Al-Qaeda to justice and preventing the emergence of other terrorist networks.[329] These goals would be accomplished by imposing economic and military sanctions against states harbouring terrorists, and increasing global surveillance and intelligence sharing.[330]

    On September 14, 2001, the U.S. Congress passed the Authorization for the use of Military Force Against Terrorists, which grants the President the authority to use all "necessary and appropriate force" against those whom he determined "planned, authorized, committed or aided" the September 11 attacks or who harboured said persons or groups. It is still in effect to this day.[331]

    On October 7, 2001, the War in Afghanistan began when U.S. and British forces initiated aerial bombing campaigns targeting Taliban and Al-Qaeda camps, then later invaded Afghanistan with ground troops of the Special Forces.[citation needed] This eventually led to the overthrow of the Taliban's rule of Afghanistan with the Fall of Kandahar on December 7, 2001, by U.S.-led coalition forces.[332]

    Al-Qaeda leader Osama bin Laden, who went into hiding in the White Mountains, was targeted by U.S. coalition forces in the Battle of Tora Bora,[333] but he escaped across the Pakistani border and would remain out of sight for almost ten years.[333] In an interview with Tayseer Allouni on 21 October 2001, Bin Laden stated:

    "The events proved the extent of terrorism that America exercises in the world. Bush stated that the world has to be divided in two: Bush and his supporters, and any country that doesn't get into the global crusade is with the terrorists. What terrorism is clearer than this? Many governments were forced to support this "new terrorism.".. America wouldn't live in security until we live it truly in Palestine. This showed the reality of America, which puts Israel's interest above its own people's interest. America won't get out of this crisis until it gets out of the Arabian Peninsula, and until it stops its support of Israel.[334]
    The Philippines and Indonesia, among other nations with their internal conflicts with Islamic terrorism, also increased their military readiness.[335][336] The military forces of the United States of America and the Islamic Republic of Iran cooperated to overthrow the Taliban regime, which had had conflicts with the government of Iran.[318][337][338][339]Iran's Quds Force helped U.S. forces and Afghan rebels in the 2001 uprising in Herat.[340][341][342]

    Aftermath
    Main article: Aftermath of the September 11 attacks
    See also: Post-9/11
    Health issues
    Main article: Health effects arising from the September 11 attacks
     Survivors covered in dust after the collapse of the World Trade towers; a photograph of another dust-covered victim Marcy Borders (1973–2015) subsequently gained much attention[343][344]
    Hundreds of thousands of tons of toxic debris containing more than 2,500 contaminants and known carcinogens were spread across Lower Manhattan when the Twin Towers' collapsed.[345][346] Exposure to the toxins in the debris is alleged to have contributed to fatal or debilitating illnesses among people who were at Ground Zero.[347][348] The Bush administration ordered the Environmental Protection Agency (EPA) to issue reassuring statements regarding air quality in the aftermath of the attacks, citing national security, but the EPA did not determine that air quality had returned to pre-September 11 levels until June 2002.[349]

    Health effects extended to residents, students, and office workers of Lower Manhattan and nearby Chinatown.[350] Several deaths have been linked to the toxic dust, and victims' names were included in the World Trade Center memorial.[351] Approximately 18,000 people have been estimated to have developed illnesses as a result of the toxic dust.[352] There is also scientific speculation that exposure to various toxic products in the air may have negative effects on fetal development.[citation needed] A study of rescue workers released in April 2010 found that all those studied had impaired lung functions and that 30%–40% were reporting little or no improvement in persistent symptoms that started within the first year of the attack.[353]

    Years after the attacks, legal disputes over the costs of illnesses related to the attacks were still in the court system. On October 17, 2006, a federal judge rejected New York City's refusal to pay for health costs for rescue workers, allowing for the possibility of numerous suits against the city.[354] Government officials have been faulted for urging the public to return to lower Manhattan in the weeks shortly after the attacks. Christine Todd Whitman, administrator of the EPA in the attacks' aftermath, was heavily criticized by a U.S. District Judge for incorrectly saying that the area was environmentally safe.[355] Mayor Giuliani was criticized for urging financial industry personnel to return quickly to the greater Wall Street area.[356]

    On December 22, 2010, the United States Congress passed the James L. Zadroga 9/11 Health and Compensation Act, which President Barack Obama signed into law on January 2, 2011. It allocated $4.2 billion to create the World Trade Center Health Program, which provides testing and treatment for people suffering from long-term health problems related to the 9/11 attacks.[357][358] The WTC Health Program replaced preexisting 9/11-related health programs such as the Medical Monitoring and Treatment Program and the WTC Environmental Health Center program.[358]

    In 2020, the NYPD confirmed that 247 NYPD police officers had died due to 9/11-related illnesses. In September 2022, the FDNY confirmed that the total number of firefighters who died due to 9/11-related illnesses was 299. Both agencies believe that the death toll will rise dramatically in the coming years. The Port Authority of New York and New Jersey Police Department (PAPD), the law enforcement agency with jurisdiction over the World Trade Center due to the Port Authority of New York and New Jersey owning the site confirmed that four of its police officers have died of 9/11-related illnesses. The chief of the PAPD at the time, Joseph Morris, made sure that industrial-grade respirators were provided to all PAPD police officers within 48 hours and decided that the same 30 to 40 police officers would be stationed at the World Trade Center pile, drastically lowering the number of total PAPD personnel who would be exposed to the air. The FDNY and NYPD had rotated hundreds, if not thousands, of different personnel from all over New York City to the pile, which exposed many of them to dust that would give them cancer or other diseases years or decades later. Also, they were not given adequate respirators and breathing equipment that could have prevented future diseases.[359][360][361][362]

    Economic
    Main article: Economic effects of the September 11 attacks
     U.S. deficit and debt increases in the seven years following the attacks from 2001 to 2008
    The attacks had a significant economic impact on the United States and world markets.[363][364] The stock exchanges did not open on September 11 and remained closed until September 17. Reopening, the Dow Jones Industrial Average (DJIA) fell 684 points, or 7.1%, to 8921, a record-setting one-day point decline.[365] By the end of the week, the DJIA had fallen 1,369.7 points (14.3%), at the time its largest one-week point drop in history. In 2001 dollars, U.S. stocks lost $1.4 trillion in valuation for the week.[366]

    In New York City, about 430,000 job months and $2.8 billion in wages were lost in the first three months after the attacks. The economic effects were mainly on the economy's export sectors.[367][368][369] The city's GDP was estimated to have declined by $27.3 billion for the last three months of 2001 and all of 2002. The U.S. government provided $11.2 billion in immediate assistance to the Government of New York City in September 2001, and $10.5 billion in early 2002 for economic development and infrastructure needs.[370]

    Also hurt were small businesses in Lower Manhattan near the World Trade Center (18,000 of which were destroyed or displaced), resulting in lost jobs and wages. Assistance was provided by Small Business Administration loans; federal government Community Development Block Grants; and Economic Injury Disaster Loans.[370] Some 31,900,000 square feet (2,960,000 m2) of Lower Manhattan office space was damaged or destroyed.[371] Many wondered whether these jobs would return, and if the damaged tax base would recover.[372] Studies of 9/11's economic effects show the Manhattan office real-estate market and office employment were less affected than first feared, because of the financial services industry's need for face-to-face interaction.[373][374]

    North American air space was closed for several days after the attacks and air travel decreased upon its reopening, leading to a nearly 20% cutback in air travel capacity, and exacerbating financial problems in the struggling U.S. airline industry.[375]

    The September 11 attacks also led to the U.S. wars in Afghanistan and Iraq,[376] as well as additional homeland security spending, totaling at least $5 trillion.[377]

    Effects in Afghanistan
    Further information: War in Afghanistan (2001–2021), Aftermath of the War in Afghanistan (2001–2021), and Killing of Ayman al-Zawahiri
    If Americans are clamouring to bomb Afghanistan back to the Stone Age, they ought to know that this nation does not have so far to go. This is a post-apocalyptic place of felled cities, parched land and downtrodden people.
    — Barry Bearak, The New York Times, September 13, 2001[378]
    Most of the Afghan population was already going hungry at the time of the September 11 attacks.[379] In the aftermath of the attacks, tens of thousands of people attempted to flee Afghanistan due to the possibility of military retaliation by the United States. Pakistan, already home to many Afghan refugees from previous conflicts, closed its border with Afghanistan on September 17, 2001.[380] Thousands of Afghans also fled to the frontier with Tajikistan, although were denied entry.[381] The Taliban leaders in Afghanistan themselves pleaded against military action, saying "We appeal to the United States not to put Afghanistan into more misery because our people have suffered so much", referring to two decades of conflict and the humanitarian crisis attached to it.[378]

    All United Nations expatriates had left Afghanistan after the attacks and no national or international aid workers were at their post. Workers were instead preparing in bordering countries like Pakistan, China and Uzbekistan to prevent a potential "humanitarian catastrophe", amid a critically low food stock for the Afghan population.[382] The World Food Programme stopped importing wheat to Afghanistan on September 12 due to security risks.[383] The Wall Street Journal suggested the creation of a buffer zone in an inevitable war, similarly as in the Bosnian War.[384]

     
     
    From left to right: U.S. soldiers engaged in the War on Terror in Afghanistan in May 2006 • Army Major General Chris Donahue left Afghanistan as the final American soldier on August 30, 2021
    Approximately one month after the attacks, the United States led a broad coalition of international forces to overthrow the Taliban regime from Afghanistan for their harboring of Al-Qaeda.[380] Though Pakistani authorities were initially reluctant to align themselves with the United States against the Taliban, they permitted the coalition access to their military bases, and arrested and handed over to the U.S. over 600 suspected Al-Qaeda members.[385][386]

    In a speech by the Nizari Ismaili Imam at the Nobel Institute in 2005, Aga Khan IV stated that the "9/11 attack on the United States was a direct consequence of the international community ignoring the human tragedy that was Afghanistan at that time".[387]

    In 2011, the U.S. and NATO under President Obama initiated a drawdown of troops in Afghanistan finalized in 2016. During the presidencies of Donald Trump and Joe Biden in 2020 and 2021, the United States alongside its NATO allies withdrew all troops from Afghanistan completing the withdrawal of all regular U.S. troops on August 30, 2021, 12 days before the 20th anniversary of the September 11 attacks,[150][388][389] The withdrawal marked the end of the 2001–2021 War in Afghanistan. Biden said that after nearly 20 years of war, it was clear that the U.S. military could not transform Afghanistan into a modern democracy.[390]

    The second emir of Al-Qaeda, Ayman al-Zawahiri, a close associate of bin Laden, was killed in a U.S. drone strike at his home in Kabul, Afghanistan on July 31, 2022.[391]

    Cultural influence
    Main article: Cultural influence of the September 11 attacks
    Further information: List of cultural references to the September 11 attacks, Entertainment affected by the September 11 attacks, and Osama bin Laden in popular culture
    See also: Osama bin Laden (elephant)
    The impact of 9/11 extends beyond geopolitics and into society and culture in general. Immediate responses to 9/11 included greater focus on home life and time spent with family, higher church attendance, and increased expressions of patriotism such as the flying of American flags.[392] The radio industry responded by removing certain songs from playlists, and the attacks have subsequently been used as background, narrative, or thematic elements in film, music, literature, and humour. Already-running television shows as well as programs developed after 9/11 have reflected post-9/11 cultural concerns.[393]

    9/11 conspiracy theories have become a social phenomenon, despite a lack of support from expert scientists, engineers, and historians.[394] 9/11 has also had a major impact on the religious faith of many individuals; for some it strengthened, to find consolation to cope with the loss of loved ones and overcome their grief; others started to question their faith or lose it entirely because they could not reconcile it with their view of religion.[395][396]

    The culture of America, after the attacks, is noted for heightened security and an increased demand thereof, as well as paranoia and anxiety regarding future terrorist attacks against most of the nation. Psychologists have also confirmed that there has been an increased amount of national anxiety in commercial air travel.[397] Anti-Muslim hate crimes rose nearly ten-fold in 2001 and have subsequently remained "roughly five times higher than the pre-9/11 rate".[398]

    Government policies towards terrorism
    Further information: War on terror, Anti-terrorism legislation, Airport security repercussions due to the September 11 attacks, and Legal issues related to the September 11 attacks
    See also: Senate Intelligence Committee report on CIA torture
     Alleged "extraordinary rendition" illegal flights of the CIA, as reported by Polish newspaper Rzeczpospolita[399]
    As a result of the attacks, many governments across the world passed legislation to combat terrorism.[400] In Germany, where several of the 9/11 terrorists had resided and taken advantage of that country's liberal asylum policies, two major anti-terrorism packages were enacted. The first removed legal loopholes that permitted terrorists to live and raise money in Germany. The second addressed the effectiveness and communication of intelligence and law enforcement.[401] Canada passed the Canadian Anti-Terrorism Act, their first anti-terrorism law.[402] The United Kingdom passed the Anti-terrorism, Crime and Security Act 2001 and the Prevention of Terrorism Act 2005.[403][404] New Zealand enacted the Terrorism Suppression Act 2002.[405]

    In the United States, the Department of Homeland Security was created by the Homeland Security Act of 2002 to coordinate domestic anti-terrorism efforts. The USA Patriot Act gave the federal government greater powers, including the authority to detain foreign terror suspects for a week without charge; to monitor terror suspects' telephone communications, e-mail, and Internet use; and to prosecute suspected terrorists without time restrictions. The FAA ordered that aeroplane cockpits be reinforced to prevent terrorists from gaining control of planes and assigned sky marshals to flights.

    Further, the Aviation and Transportation Security Act made the federal government, rather than airports, responsible for airport security. The law created the Transportation Security Administration to inspect passengers and luggage, causing long delays and concern over passenger privacy.[406] After suspected abuses of the USA Patriot Act were brought to light in June 2013 with articles about the collection of American call records by the NSA and the PRISM program (see Global surveillance disclosures (2013–present)), Representative Jim Sensenbrenner,(R- Wisconsin) who introduced the Patriot Act in 2001, said that the NSA overstepped its bounds.[407][408]

    Criticism of the war on terror has focused on its morality, efficiency, and cost. According to a 2021 study conducted under the auspices of the Watson Institute for International and Public Affairs, the several post-9/11 wars participated in by the United States in its War on Terror have caused the displacement, conservatively calculated, of 38 million people in Afghanistan, Pakistan, Iraq, Libya, Syria, Yemen, Somalia, and the Philippines.[409][410][411] The study estimated these wars caused the deaths of 897,000 to 929,000 people and cost $8 trillion.[411] The U.S. Constitution and U.S. law prohibits the use of torture, yet such human rights violations occurred during the War on Terror under the euphemism "enhanced interrogation".[412][413] In 2005, The Washington Post and Human Rights Watch (HRW) published revelations concerning CIA flights and "black sites", covert prisons operated by the CIA.[414][415] The term "torture by proxy" is used by some critics to describe situations in which the CIA and other U.S. agencies have transferred suspected terrorists to countries known to employ torture.[416][417]

    Legal proceedings
    Main articles: Trials related to the September 11 attacks and United States v. Khalid Sheikh Mohammed
    As all 19 hijackers died in the attacks, they were never prosecuted. Osama bin Laden was never formally indicted but was after a 10-year manhunt killed by U.S. special forces on May 2, 2011 in his compound in Abbottabad, Pakistan.[l][418] The main trial of the attacks against Mohammed and his co-conspirators Walid bin Attash, Ramzi bin al-Shibh, Ammar al-Baluchi, and Mustafa Ahmad al Hawsawi remains unresolved. Khalid Sheikh Mohammed was arrested on March 1, 2003, in Rawalpindi, Pakistan, by Pakistani security officials working with the CIA. He was then held at multiple CIA secret prisons and Guantanamo Bay, where he was interrogated and tortured with methods including waterboarding.[419][420] In 2003, Mustafa al-Hawsawi and Abd al-Aziz Ali were arrested and transferred to US custody. Both would later be accused of providing money and travel assistance to the hijackers.[421] During U.S. hearings at Guantanamo Bay in March 2007, Mohammed again confessed his responsibility for the attacks, stating he "was responsible for the 9/11 operation from A to Z" and that his statement was not made under duress.[42][422] In January 2023, the US government opened up about a potential plea deal,[423] with Biden giving up on the effort in September that year.[424]

    To date, only peripheral persons have thus been convicted for charges in connection with the attacks. These include:

    Zacarias Moussaoui who was indicted in December 2001 and sentenced to life in prison without the possibility of parole in May 2006 by a U.S. federal jury
    Mounir El Motassadeq who was first convicted in February 2003 by a Federal Court of Justice in Germany and was deported to Morocco in October 2018 after serving his sentence[425]
    Abu Dahdah who was arrested in November 2001, sentenced by a Spanish High Court and released from prison in May 2013.[426]
    Investigations
    FBI
    Further information: Hijackers in the September 11 attacks
    Immediately after the attacks, the Federal Bureau of Investigation started PENTTBOM, the largest criminal inquiry in United States history. At its height, more than half of the FBI's agents worked on the investigation and followed a half-million leads.[427] The FBI concluded that there was "clear and irrefutable" evidence linking Al-Qaeda and bin Laden to the attacks.[428]

     Mohamed Atta was one of the main planners of the attacks and the operational leader, responsible for crashing Flight 11 into the North Tower
    The FBI quickly identified the hijackers, including leader Mohamed Atta, when his luggage was discovered at Boston's Logan Airport. Atta had been forced to check two of his three bags due to space limitations on the 19-seat commuter flight he took to Boston. Due to a new policy instituted to prevent flight delays, the luggage failed to make it aboard American Airlines Flight 11 as planned. The luggage contained the hijackers' names, assignments, and Al-Qaeda connections. "It had all these Arab-language [sic] papers that amounted to the Rosetta stone of the investigation", said one FBI agent.[429] Within hours of the attacks, the FBI released the names and in many cases the personal details of the suspected pilots and hijackers.[430][431] Abu Jandal, who served as bin Laden's chief bodyguard for years, confirmed the identity of seven hijackers as Al-Qaeda members during interrogations with the FBI on September 17. He had been jailed in a Yemeni prison since 2000.[432][433] On September 27, 2001, photos of all 19 hijackers were released, along with information about possible nationalities and aliases.[434] Fifteen of the men were from Saudi Arabia, two were from the United Arab Emirates, one was from Egypt, and one was from Lebanon.[435]

    By midday, the U.S. National Security Agency and German intelligence agencies had intercepted communications pointing to Osama bin Laden.[436] Two of the hijackers were known to have traveled with a bin Laden associate to Malaysia in 2000[437] and hijacker Mohamed Atta had previously gone to Afghanistan.[438] He and others were part of a terrorist cell in Hamburg.[439] One of the members of the Hamburg cell in Germany was discovered to have been in communication with Khalid Sheikh Mohammed who was identified as a member of Al-Qaeda.[440]

    Authorities in the United States and the United Kingdom also obtained electronic intercepts, including telephone conversations and electronic bank transfers, which indicated that Mohammed Atef, a bin Laden deputy, was a key figure in the planning of the 9/11 attacks. Intercepts were also obtained that revealed conversations that took place days before September 11 between bin Laden and an associate in Pakistan. In those conversations, the two referred to "an incident that would take place in America on, or around, September 11" and they discussed potential repercussions. In another conversation with an associate in Afghanistan, bin Laden discussed the "scale and effects of a forthcoming operation". These conversations did not specifically mention the World Trade Center, the Pentagon, or other specifics.[441]



    Origins of the 19 hijackers
    Nationality
    Number
    Saudi Arabia
     
    15
    United Arab Emirates
     
    2
    Egypt
     
    1
    Lebanon
     
    1
    In their annual violent crime index for the year 2001, the FBI recorded the deaths from the attacks as murder, in separate tables so as not to mix them with other reported crimes for that year.[442] In a disclaimer, the FBI stated that "the number of deaths is so great that combining it with the traditional crime statistics will have an outlier effect that falsely skews all types of measurements in the program's analyses".[443] New York City also did not include the deaths in their annual crime statistics for 2001.[444]

    CIA
    Further information: September 11 intelligence before the attacks
    In 2004, John L. Helgerson, the Inspector General of the Central Intelligence Agency (CIA), conducted an internal review of the agency's pre-9/11 performance and was harshly critical of senior CIA officials for not doing everything possible to confront terrorism.[445] According to Philip Giraldi in The American Conservative, Helgerson criticized their failure to stop two of the 9/11 hijackers, Nawaf al-Hazmi and Khalid al-Mihdhar, as they entered the United States and their failure to share information on the two men with the FBI.[446]

    In May 2007, senators from both major U.S. political parties (the Republican and Democratic party) drafted legislation to make the review public. One of the backers, Senator Ron Wyden said, "The American people have a right to know what the Central Intelligence Agency was doing in those critical months before 9/11".[447] The report was released in 2009 by President Barack Obama.[445]

    Congressional inquiry
    Main article: Joint Inquiry into Intelligence Community Activities before and after the Terrorist Attacks of September 11, 2001
    In February 2002, the Senate Select Committee on Intelligence and the House Permanent Select Committee on Intelligence formed a joint inquiry into the performance of the U.S. Intelligence Community.[448] Their 832-page report released in December 2002[449] detailed failings of the FBI and CIA to use available information, including about terrorists the CIA knew were in the United States, to disrupt the plots.[450] The joint inquiry developed its information about possible involvement of Saudi Arabian government officials from non-classified sources.[451] Nevertheless, the Bush administration demanded 28 related pages remain classified.[450] In December 2002, the inquiry's chair Bob Graham (D-FL) revealed in an interview that there was "evidence that there were foreign governments involved in facilitating the activities of at least some of the terrorists in the United States".[452] September 11 victim families were frustrated by the unanswered questions and redacted material from the congressional inquiry and demanded an independent commission.[450] September 11 victim families,[453] members of Congress[454] and the Saudi Arabian government are still seeking the release of the documents.[455][456] In June 2016, CIA chief John Brennan said that he believes 28 redacted pages of a congressional inquiry into 9/11 will soon be made public, and that they will prove that the government of Saudi Arabia had no involvement in the September 11 attacks.[457]

    In September 2016, Congress passed the Justice Against Sponsors of Terrorism Act that would allow relatives of victims of the September 11 attacks to sue Saudi Arabia for its government's alleged role in the attacks.[458][459][460]

    9/11 Commission
    Main articles: 9/11 Commission and 9/11 Commission Report
    See also: Criticism of the 9/11 Commission
     The cover of the 9/11 Commission Report, a 585-page report released in 2004, on events leading up to the September 11 attacks and steps recommended to avoid a future terrorist attack
    The National Commission on Terrorist Attacks Upon the United States, popularly known as the 9/11 Commission, chaired by Thomas Kean, governor of New Jersey from 1982 to 1990,[m] was formed in late 2002 to prepare a thorough account of the circumstances surrounding the attacks, including preparedness for and the immediate response to the attacks.[465] On July 22, 2004, the commission issued the 9/11 Commission Report, a 585-page report based on its investigations and interviews. The report detailed the events leading up to the September 11 attacks, concluding that they were carried out by Al-Qaeda. The commission also examined how security and intelligence agencies were inadequately coordinated to prevent the attacks.

    According to the report, "We believe the 9/11 attacks revealed four kinds of failures: in imagination, policy, capabilities, and management".[466] The commission made numerous recommendations on how to prevent future attacks, and in 2011 was dismayed that several of its recommendations had yet to be implemented.[467]

    National Institute of Standards and Technology
    Main article: NIST World Trade Center Disaster Investigation
    See also: 7 World Trade Center § 9/11 and collapse
     The exterior support columns from the lower level of the South Tower remained standing after the building collapsed
    The U.S. National Institute of Standards and Technology (NIST) investigated the collapses of the Twin Towers and 7 WTC. The investigations examined why the buildings collapsed and what fire protection measures were in place, and evaluated how fire protection systems might be improved in future construction.[468] The investigation into the collapse of 1 WTC and 2 WTC was concluded in October 2005 and that of 7 WTC was completed in August 2008.[469]

    NIST found that the fireproofing on the Twin Towers' steel infrastructures was blown off by the initial impact of the planes and that had this not occurred, the towers likely would have remained standing.[470] A 2007 study of the north tower's collapse published by researchers of Purdue University determined that since the plane's impact had stripped off much of the structure's thermal insulation, the heat from a typical office fire would have softened and weakened the exposed girders and columns enough to initiate the collapse regardless of the number of columns cut or damaged by the impact.[471][472]

    The director of the original investigation stated that "the towers did amazingly well. The terrorist aircraft didn't bring the buildings down; it was the fire that followed. It was proven that you could take out two-thirds of the columns in a tower and the building would still stand".[473] The fires weakened the trusses supporting the floors, making the floors sag. The sagging floors pulled on the exterior steel columns causing the exterior columns to bow inward.

    With the damage to the core columns, the buckling exterior columns could no longer support the buildings, causing them to collapse. Additionally, the report found the towers' stairwells were not adequately reinforced to provide adequate emergency escape for people above the impact zones.[474] NIST concluded that uncontrolled fires in 7 WTC caused floor beams and girders to heat and subsequently "caused a critical support column to fail, initiating a fire-induced progressive collapse that brought the building down".[469]

    Alleged Saudi government role
    Main article: Alleged Saudi government role in the September 11 attacks
    See also: Saudi Arabia–United States relations, Saudi Arabia and state-sponsored terrorism, and The 28 pages
    In July 2016, the Obama administration released a document compiled by U.S. investigators Dana Lesemann and Michael Jacobson, known as "File 17",[475] which contains a list naming three dozen people, including the suspected Saudi intelligence officers attached to Saudi Arabia's embassy in Washington, D.C.,[476] which connects Saudi Arabia to the hijackers.[477][478]

    In September 2016, Congress passed the Justice Against Sponsors of Terrorism Act.[479][480] The practical effect of the legislation was to allow the continuation of a longstanding civil lawsuit brought by families of victims of the September 11 attacks against Saudi Arabia for its government's alleged role in the attacks.[481] In March 2018, a U.S. judge formally allowed a suit to move forward against the government of Saudi Arabia brought by 9/11 survivors and victims' families.[479]

    In 2022, the families of some 9/11 victims obtained two videos and a notepad seized from Saudi national Omar al-Bayoumi by the British courts. The first video showed him hosting a party in San Diego for Nawaf al-Hazmi and Khalid al-Mihdhar, the first two hijackers to arrive in the U.S. The other video showed al-Bayoumi greeting the cleric Anwar al-Awlaki, who was blamed for radicalizing Americans and later killed in a CIA drone strike. The notepad depicted a hand-drawn aeroplane and some mathematical equations that, according to a pilot's court statement, might have been used to calculate the rate of descent to get to a target. According to a 2017 FBI memo, from the late 1990s up until the 9/11 attack, al-Bayoumi was a paid cooptee of the Saudi General Intelligence Presidency. As of April 2022 he is believed to be living in Saudi Arabia, which has denied any involvement in 9/11.[482]

    Rebuilding and memorials
    Reconstruction
    Main articles: Rescue and recovery effort after the September 11 attacks on the World Trade Center and Construction of One World Trade Center
    Further information: World Trade Center (2001–present) and World Trade Center site
     The rebuilt World Trade Center, September 2020
    On the day of the attacks, New York City mayor Rudy Giuliani stated: "We will rebuild. We're going to come out of this stronger than before, politically stronger, economically stronger. The skyline will be made whole again".[483]

    Within hours of the attack, a substantial search and rescue operation was launched. After months of around-the-clock operations, the World Trade Center site was cleared by the end of May 2002.[484] The damaged section of the Pentagon was rebuilt and occupied within a year of the attacks.[485] The temporary World Trade Center PATH station opened in late 2003 and construction of the new 7 World Trade Center was completed in 2006. Work on rebuilding the main World Trade Center site was delayed until late 2006 when leaseholder Larry Silverstein and the Port Authority of New York and New Jersey agreed on financing.[486] The construction of One World Trade Center began on April 27, 2006, and reached its full height on May 20, 2013. The spire was installed atop the building at that date, putting One WTC's height at 1,776 feet (541 m) and thus claiming the title of the tallest building in the Western Hemisphere.[487][488] One WTC finished construction and opened on November 3, 2014.[488][489][490]

    On the World Trade Center site, three more office towers were to be built one block east of where the original towers stood.[491] 4 WTC, meanwhile, opened in November 2013, making it the second tower on the site to open behind 7 World Trade Center, as well as the first building on the Port Authority property.[492] 3 WTC opened on June 11, 2018, becoming the fourth skyscraper at the site to be completed.[493] In December 2022, the Nicholas Greek Orthodox Church fully reopened for regular services[494] followed by the opening of the Ronald O. Perelman Performing Arts Center in September 2023.[495] With construction beginning in 2008,[496] 2 World Trade Center remains as of 2023 unfinished.[497] Construction of a 5 World Trade Center is planned to begin in 2024 and be finished by 2029.[498][499]

    Christopher O. Ward, Port Authority of New York and New Jersey Executive Director from 2008 to 2011, is a survivor of the attacks and is credited with getting the construction of the 9/11 site back on track.[500]

    Memorials
    Main article: Memorials and services for the September 11 attacks
     The National September 11 Memorial and Museum in Lower Manhattan, August 2016
    In the days immediately following the attacks, many memorials and vigils were held around the world, and photographs of the dead and missing were posted around Ground Zero. A witness described being unable to "get away from faces of innocent victims who were killed. Their pictures are everywhere, on phone booths, street lights, and walls of subway stations. Everything reminded me of a huge funeral, people were quiet and sad, but also very nice. Before, New York gave me a cold feeling; now people were reaching out to help each other".[501] President Bush proclaimed Friday, September 14, 2001 as Patriot Day.[502]

     Tribute in Light, featuring two columns of light representing the Twin Towers, September 2020
    One of the first memorials was the Tribute in Light, an installation of 88 searchlights at the footprints of the World Trade Center towers.[503] In New York City, the World Trade Center Site Memorial Competition was held to design an appropriate memorial on the site.[504] The winning design, Reflecting Absence, was selected in August 2006, and consists of a pair of reflecting pools in the footprints of the towers, surrounded by a list of the victims' names in an underground memorial space.[505] The memorial was completed on September 11, 2011;[506] a museum also opened on site on May 21, 2014.[507]

    The Sphere by the German sculptor Fritz Koenig is the world's largest bronze sculpture of modern times, and stands between the Twin Towers on the Austin J. Tobin Plaza of the World Trade Center in New York City from 1971 until the terrorist attacks on September 11, 2001. The sculpture, weighing more than 20 tons, was the only remaining work of art to be recovered largely intact from the ruins of the collapsed Twin Towers after the attacks. Since then, the work of art, known in the U.S. as The Sphere, has been transformed into an important symbolic monument of 9/11 commemoration. After being dismantled and stored near a hangar at John F. Kennedy International Airport, the sculpture was the subject of the 2001 documentary The Sphere by filmmaker Percy Adlon. On August 16, 2017, the work was reinstated, installed at the Liberty Park, close to the new World Trade Center aerial and the 9/11 Memorial.[508]

     The National 9/11 Pentagon Memorial in Arlington County, Virginia, September 2008
    In Arlington County, the Pentagon Memorial was completed and opened to the public on the seventh anniversary of the attacks in 2008.[509][510] It consists of a landscaped park with 184 benches facing the Pentagon.[511] When the Pentagon was repaired in 2001–2002, a private chapel and indoor memorial were included, located at the spot where Flight 77 crashed into the building.[512]

    In Shanksville, a concrete-and-glass visitor center was opened on September 10, 2015,[513] situated on a hill overlooking the crash site and the white marble Wall of Names.[514] An observation platform at the visitor centre and the white marble wall are both aligned beneath the path of Flight 93.[514][515] A temporary memorial is located 500 yards (457 m) from the crash site.[516] New York City firefighters donated a cross made of steel from the World Trade Center and mounted on top of a platform shaped like the Pentagon.[517] It was installed outside the firehouse on August 25, 2008.[518] Many other permanent memorials are elsewhere. Scholarships and charities have been established by the victims' families and by many other organizations and private figures.[519]

    On every anniversary in New York City, the names of the victims who died there are read out against a background of sombre music. The President of the United States attends a memorial service at the Pentagon,[520] and asks Americans to observe Patriot Day with a moment of silence. Smaller services are held in Shanksville, Pennsylvania, which are usually attended by the First Lady. In September 2023, President Joe Biden did not attend services in the affected areas, instead marking the day in Anchorage, Alaska, the first US President to do so since the attacks.[521][522][523]

     
    See also
    9/11 Commission
    9/11 Commission Report
    Air France Flight 8969
    Bojinka plot
    Delta 1989 and Korean 085, two other flights that were falsely suspected of being hijacked as part of the September 11 attacks
    List of cultural references to the September 11 attacks
    Khobar Towers bombing
    List of attacks on U.S. territory
    List of aviation incidents involving terrorism
    List of deadliest terrorist attacks in the United States
    List of Islamist terrorist attacks
    List of major terrorist incidents
    List of terrorist incidents in 2001
    List of terrorist incidents in New York CityOutline of the September 11 attacks
    Timeline of al-Qaeda attacks
    Timeline of the September 11 attacks
    USS Cole bombing
    1993 World Trade Center bombing
    1998 United States embassy bombing
    2006 transatlantic aircraft plot
    2007 John F. Kennedy International Airport attack plot
    2009 Bronx terrorism plot
    2010 transatlantic aircraft bomb plot
    2023 Israel–Hamas war
    2004 Madrid train bombings
    References
    Notes
    ^ Other, secondary attack locations include the airspaces of Massachusetts, New Jersey, Ohio, Kentucky and West Virginia.
    ^ The hijackers began their first attack at around 08:13 a.m., when a group of five took control of American Airlines Flight 11, injuring two people and murdering one before forcing their way into the cockpit.
    ^ The fourth and final hijacked plane of the attacks crashed in a Pennsylvania field at 10:03 a.m., which concluded the attacks since all the attackers were now dead and all of the hijacked planes were destroyed. However, the attackers' damage continued as the North Tower kept burning for an additional 25 minutes until it ultimately collapsed by 10:28 a.m.
    ^ Sources vary regarding the number of injuries―some say 6,000[1] while others go as high as 25,000.[2]
    ^ The expression 9/11 is typically pronounced "nine eleven" in English, even including places that use the opposite numerical dating convention; the slash is not pronounced.
    ^ The exact time is disputed. The 9/11 Commission Report states that Flight 11 struck the North Tower at 08:46:40 a.m.,[3] NIST reports 08:46:30 a.m.,[4] and some other sources claim 08:46:26 a.m.[5]
    ^ Jump up to:a b c The exact time is disputed. The 9/11 Commission Report states that Flight 175 struck the South Tower at 09:03:11 a.m.,[6][7] NIST reports 09:02:59 a.m.,[8] and some other sources claim 09:03:02 a.m.[9] In any case, the 16-minute gap between each impact is rounded to 17.[10]
    ^ Jump up to:a b While NIST and the 9/11 Commission give differing accounts of the exact second of the North Tower's collapse initiation, with NIST placing it at 10:28:22 a.m.[11][12] and the commission at 10:28:25 a.m.,[13] it is generally accepted that Flight 11 did not strike the North Tower any sooner than 8:46:26 a.m.,[5] so the time it took for the North Tower to collapse was just shy of 102 minutes either way.
    ^ NIST and the 9/11 Commission both state that the collapse began at 9:58:59 a.m., which is rounded to 9:59[148]: 84 [147]: 322  for simplicity. If the commission's claim that the South Tower was struck at 9:03:11 is to be believed, then the collapse began 55 minutes and 48 seconds after the crash, not 56 minutes.
    ^ The exact time of the North Tower's collapse initiation is disputed, with NIST dubbing the moment it began to collapse as being 10:28:22 a.m.[149] and the 9/11 Commission recording the time as 10:28:25.[150]: 329 
    ^ The massacre at Camp Speicher―often described as the second deadliest act of terrorism in history after 9/11―is said to have killed between 1,095 and 1,700 people.[161] The upper estimate would tie it with the attack on the World Trade Center's North Tower, but until the true death toll of the massacre becomes known, then the hijacking and crash of Flight 11 was the deadliest act of terrorism on record.
    ^ President Barack Obama announced his death on May 1. At the time of the raid, it was early morning of May 2 in Pakistan and late afternoon of May 1 in the U.S.
    ^ Former Secretary of State Henry Kissinger was initially appointed to head the commission[461] but resigned only weeks after being appointed, to avoid conflicts of interest.[462] Former U.S. Senator George Mitchell was originally appointed as the vice chairman, but he stepped down on December 10, 2002, not wanting to sever ties to his law firm.[463] On December 15, 2002, Bush appointed former New Jersey Governor Tom Kean to head the commission.[464]
    Citations
    ^ "A Day of Remembrance". U.S. Embassy in Georgia. September 11, 2022. Archived from the original on October 24, 2023. Retrieved October 27, 2022.
    ^ Stempel, Jonathan (July 29, 2019). "Accused 9/11 mastermind open to role in victims' lawsuit if not executed". Reuters. Archived from the original on April 5, 2020. Retrieved October 27, 2022.
    ^ 9/11 Final Report of the National Commission (2004). Collapse of WTC1 (PDF). p. 24. Archived (PDF) from the original on September 12, 2017. Retrieved December 7, 2023.
    ^ National Institute of Standards and Technology (2005). "Final report on the collapse of the World Trade Center" (PDF). NIST: 69. Archived (PDF) from the original on July 7, 2021. Retrieved December 7, 2023.
    ^ Jump up to:a b "102 Minutes: Last Words at the Trade Center; Fighting to Live as the Towers Die". The New York Times. May 26, 2002. Archived from the original on September 12, 2009. Retrieved June 23, 2023.
    ^ Final Report of the 9/11 Commission on Terrorist Attacks Upon the United States (PDF) (Report). National Commission on Terrorist Attacks Upon the United States. July 22, 2004. pp. 7–8. Archived (PDF) from the original on August 16, 2021. Retrieved August 15, 2021.
    ^ Staff Report of the 9/11 Commission on Terrorist Attacks upon the United States (PDF) (Report). National Commission on Terrorist Attacks Upon the United States. September 2005 [August 26, 2004]. p. 24. Archived (PDF) from the original on July 12, 2014. Retrieved August 15, 2021.
    ^ Building and Fire Research Laboratory (September 2005). Visual Evidence, Damage Estimates, and Timeline Analysis (PDF) (Report). National Institute of Standards and Technology, United States Department of Commerce. p. 27. Archived (PDF) from the original on September 11, 2021. Retrieved August 24, 2021.
    ^ "Timeline for United Airlines Flight 175". NPR. June 17, 2004. Archived from the original on August 24, 2021. Retrieved August 24, 2021.
    ^ 9/11 Commission 2004a, p. 302.
    ^ "9/11/01 timeline: How the September 11, 2001 attacks unfolded". WPVI-TV. September 11, 2023. Archived from the original on November 5, 2023. Retrieved November 4, 2023.
    ^ National Institute of Standards and Technology (2005). "Final report on the collapse of the World Trade Center" (PDF). NIST: 229. Archived (PDF) from the original on July 7, 2021. Retrieved December 7, 2023.
    ^ 9/11 Final Report of the National Commission (2004). Collapse of WTC1 (PDF). p. 329. Archived (PDF) from the original on September 12, 2017. Retrieved December 7, 2023.
    ^ Baker, Peter; Cooper, Helene; Barnes, Julian; Schmitt, Eric (August 1, 2022). "U.S. Drone Strike Kills Ayman al-Zawahri, Top Qaeda Leader". The New York Times. Archived from the original on August 1, 2022. Retrieved August 1, 2022.
    ^ Jump up to:a b Gunaratna, Ronan (2002). Inside Al Qaeda. Berkley Books.
    ^ Formichi, Chiara (2020). Islam as Resistance. Cambridge University Press. p. 206.
    ^ Hafez, Mohammed M. (March 2008). "Jihad After Iraq: Lessons from the Arab Afghans Phenomenon". CTC Sentinel. Vol. 1, no. 4. Archived from the original (PDF) on May 8, 2011.
    ^ "Al-Qaeda's origins and links". BBC News. July 20, 2004. Archived from the original on August 2, 2019. Retrieved September 3, 2011.
    ^ Coll, Steve (2004). Ghost Wars: The Secret History of the CIA, Afghanistan, and Bin Laden, from the Soviet Invasion to September 10, 2001. Penguin Group. pp. 144–145, 238. ISBN 9781594200076.
    ^ Bergen (2006), pp. 60–61.
    ^ "Bin Laden's fatwā (1996)". PBS. Archived from the original on October 31, 2001. Retrieved May 29, 2014.
    ^ Jump up to:a b c d "Al Qaeda's Second Fatwa". PBS NewsHour. PBS. Archived from the original on November 28, 2013. Retrieved May 29, 2014.
    ^ Logevall, Fredrik (2002). Terrorism and 9/11: A Reader. New York: Houghton Mifflin Company. ISBN 0-618-25535-4.
    ^ "The Hamburg connection". BBC News. August 19, 2005. Archived from the original on May 30, 2013. Retrieved June 26, 2011.
    ^ "5 Al Qaeda Aims at the American Homeland". 9/11 Commission. Archived August 16, 2009, at the Wayback Machine.
    ^ Miller, John. ""Greetings, America. My name is Osama Bin Laden..."". Frontline. PBS. Archived from the original on November 24, 2023. Retrieved December 7, 2023.
    ^ Miller, John. ""Greetings, America. My name is Osama Bin Laden..."". PBS. Archived from the original on February 11, 2001.
    ^ Jump up to:a b "Bin Laden claims responsibility for 9/11". CBC News. October 29, 2004. Archived from the original on February 18, 2010. Retrieved September 1, 2011. Al-Qaeda leader Osama bin Laden appeared in a new message aired on an Arabic TV station Friday night, for the first time claiming direct responsibility for the 2001 attacks against the United States.
    ^ "Pakistan inquiry orders Bin Laden family to remain". BBC News. July 6, 2011. Archived from the original on November 30, 2019. Retrieved September 3, 2011.
    ^ "Full transcript of bin Laden's speech". Al Jazeera. November 2, 2004. Archived from the original on June 13, 2007. Retrieved September 3, 2011.
    ^ "Pakistan to Demand Taliban Give Up Bin Laden as Iran Seals Afghan Border". Fox News. September 16, 2001. Archived from the original on May 23, 2010. Retrieved September 3, 2011.
    ^ "Bin Laden on tape: Attacks 'benefited Islam greatly'". CNN. December 14, 2001. Archived from the original on December 27, 2007. Retrieved November 24, 2013. Reveling in the details of the fatal attacks, bin Laden brags in Arabic that he knew about them beforehand and said the destruction went beyond his hopes. He says the attacks "benefited Islam greatly".
    ^ "Transcript: Bin Laden video excerpts". BBC News. December 27, 2001. Archived from the original on July 27, 2019. Retrieved September 3, 2011.
    ^ Bin Ladin, Osama (November 1, 2004). "Full transcript of bin Ladin's speech". Al Jazeera. Archived from the original on November 1, 2020. Retrieved June 3, 2023.
    ^ "Bin Laden Dead – Where Are Other 9/11 Planners?". ABC News. May 2, 2011. Archived from the original on May 4, 2011. Retrieved February 2, 2019. While initially denying responsibility for the 9/11 attacks, Bin Laden took responsibility for them in a 2004 taped statement, saying that he had personally directed the hijackers.
    ^ "Bin Laden claims responsibility for 9/11". CBC News. October 29, 2004. Archived from the original on February 18, 2010. Retrieved February 2, 2019.
    ^ "Bin Laden 9/11 planning video aired". CBC News. September 7, 2006. Archived from the original on October 13, 2007. Retrieved September 3, 2011.
    ^ Clewley, Robin (September 27, 2001). "How Osama Cracked FBI's Top 10". Wired. Archived from the original on May 26, 2008. Retrieved May 29, 2014.
    ^ "Usama Bin Laden". Federal Bureau of Investigation. Archived from the original on October 11, 2010. Retrieved September 10, 2011.
    ^ "We left out nuclear targets, for now". The Guardian. London. March 4, 2003. Archived from the original on January 23, 2008. Retrieved September 3, 2011. Yosri Fouda of the Arabic television channel al-Jazeera is the only journalist to have interviewed Khalid Sheikh Mohammed, the al-Qaeda military commander arrested at the weekend.
    ^ Leonard, Tom; Spillius, Alex (October 10, 2008). "Alleged 9/11 mastermind wants to confess to plot". The Daily Telegraph. London. Archived from the original on January 10, 2022. Retrieved September 3, 2011.
    ^ Jump up to:a b "September 11 suspect 'confesses'". Al Jazeera. March 15, 2007. Archived from the original on September 27, 2019. Retrieved September 3, 2011.
    ^ 9/11 Commission Report (2004), p. 147.
    ^ "White House power grabs". The Washington Times. August 26, 2009. Archived from the original on December 5, 2019. Retrieved September 3, 2011.
    ^ Van Voris, Bob; Hurtado, Patricia (April 4, 2011). "Khalid Sheikh Mohammed Terror Indictment Unsealed, Dismissed". Bloomberg BusinessWeek. Archived from the original on April 17, 2011. Retrieved September 3, 2011.
    ^ Wright 2006, p. [page needed].
    ^ "Substitution for Testimony of Khalid Sheikh Mohammed" (PDF). United States District Court for the Eastern District of Virginia. 2006. p. 24. Archived from the original (PDF) on October 26, 2019. Retrieved September 3, 2011.
    ^ "[Text of] Bin Laden's [1996] Fatwa". PBS NewsHour. Archived from the original on April 19, 2014. Retrieved June 14, 2014.
    ^ Gunarathna, pp. 61–62.
    ^ Bin Laden, Osama (2005). "Declaration of Jihad". In Lawrence, Bruce (ed.). Messages to the World: The Statements of Osama bin Laden. 6 Meard Street, London W1F OEG: Verso. pp. 139, 140, 141. ISBN 1-84467-045-7. The targets of September 11 were not women and children. The main targets were the symbol of the United States: their economic and military power.
    ^ "'Muslims have the right to attack America'". The Guardian. November 10, 2001. Archived from the original on August 25, 2013.
    ^ Jump up to:a b *"Full transcript of bin Ladin's speech". Al Jazeera. Archived from the original on January 1, 2016. Retrieved April 10, 2012.bin Laden, Osama (November 24, 2002). "Full text: bin Laden's 'letter to America'". The Observer. London. Archived from the original on July 28, 2013. Retrieved September 3, 2011.
    ^ Jump up to:a bMearsheimer (2007), p. 67.
    Kushner (2003), p. 389.
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    Berner (2007), p. 80
    ^ "Full text: bin Laden's 'letter to America'". The Guardian. November 24, 2002. Archived from the original on October 8, 2014. Retrieved January 7, 2019. The blood pouring out of Palestine must be equally revenged. You must know that the Palestinians do not cry alone; their women are not widowed alone; their sons are not orphaned alone... American people have chosen, consented to, and affirmed their support for the Israeli oppression of the Palestinians, the occupation and usurpation of their land, and its continuous killing, torture, punishment and expulsion of the Palestinians. The American people have the ability and choice to refuse the policies of their government and even to change them if they want. (b) The American people are the ones who pay the taxes that fund the planes that bomb us in Afghanistan, the tanks that strike and destroy our homes in Palestine, the armies that occupy our lands in the Arabian Gulf, and the fleets that ensure the blockade of Iraq.
    ^ Riedel, Bruce (2008). "1: The Manhattan Raid". The Search for Al Qaeda. Massachusetts Avenue, N.W., Washington, DC, US: Brookings Institution Press. pp. 5, 6. ISBN 978-0-8157-0451-5. The Palestinian intifada, the fierce uprising in the fall of 2000 on the West Bank and Gaza, was a particularly powerful motivating event for.. bin Laden... The intifada's power over bin Laden's thinking about the 9/11 raid is underscored by his repeated attempts to push KSM to advance the timing of the crashes. In September of 2000, he urged KSM to tell Atta to attack immediately to respond to the Sharon visit to the holy sites in Jerusalem; Atta told bin Laden he was not ready yet. When bin Laden learned that Sharon, who had become Israel's prime minister in March 2001, was going to visit the White House early that summer, he again pressed Atta to attack immediately. And again Atta demurred, arguing he needed more time to get the plan and the team ready to go.
    ^ Holbrook, Donald (2014). The Al-Qaeda Doctrine. New York, NY, US: Bloomsbury. p. 145. ISBN 978-1-62356-314-1.
    ^ J. Greenberg, Karen (2005). "October 21, 2001 – Interview with Tayseer Alouni". Al Qaeda Now. New York, US: Cambridge University Press. pp. 192–206. ISBN 978-0-521-85911-0. Last year's blessed intifada helped us to push more for the Palestinian issue. This push helps the other cause. Attacking America helps the cause of Palestine and vice versa. No conflict between the two; on the contrary, one serves the other.
    ^ *Plotz, David (2001) What Does Osama Bin Laden Want? Archived November 15, 2016, at the Wayback Machine, SlateBergen (2001), p. 3
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    ^ "Full text: bin Laden's 'letter to America'". The Guardian. London. November 24, 2002. Archived from the original on April 18, 2010. Retrieved April 26, 2010.
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    ^ Kates, Brian (January 30, 2010). "Al Qaeda leader Osama Bin Laden blasts U.S. in audiotape spewing hate for... global warming". New York Daily News. Archived from the original on February 1, 2010. Retrieved December 7, 2023.
    ^ "Full transcript of bin Laden's 'Letter to America'". The Guardian. London. November 24, 2002. Archived from the original on April 26, 2019. Retrieved September 3, 2011.
    ^ bin Laden, Osama. "Full transcript of bin Ladin's speech". Al Jazeera. Archived from the original on January 1, 2016. Retrieved April 10, 2012. So I shall talk to you about the story behind those events and shall tell you truthfully about the moments in which the decision was taken, for you to consider
    ^ Bruce Lawrence, ed. (2005). Messages to the World: The Statements of Osama bin Laden. 6 Meard Street, London W1F OEG: Verso. p. 119. ISBN 1-84467-045-7.
    ^ Bergen, Peter L. (2005). Holy War, Inc.: Inside the Secret World of Osama Bin Laden. New York: Simon and Schuster. ISBN 978-0-7432-3467-2. Retrieved March 20, 2020.
    ^ Jump up to:a b "1998 Al Qaeda fatwā". Federation of American Scientists (FAS). February 23, 1998. Archived from the original on April 21, 2010. Retrieved September 3, 2011.
    ^ Jump up to:a b Yusufzai, Rahimullah (September 26, 2001). "Face to face with Osama". The Guardian. London. Archived from the original on January 19, 2008. Retrieved September 3, 2011.
    ^ Pape, Robert A. (2005). Dying to Win: The Strategic Logic of Suicide Terrorism. New York: Random House. ISBN 978-0-8129-7338-9. Retrieved March 20, 2020.
    ^ See also the 1998 Al-Qaeda fatwā: "The ruling to kill the Americans and their allies – civilians and military – is an individual duty for every Muslim who can do it in any country in which it is possible to do it, in order to liberate the al-Aqsa Mosque and the holy mosque [Mecca] from their grip, and in order for their armies to move out of all the lands of Islam, defeated and unable to threaten any Muslim." Quoted from "Al Qaeda's Second Fatwa". PBS NewsHour. PBS. Archived from the original on November 28, 2013. Retrieved May 29, 2014.
    ^ Summers and Swan (2011), pp. 211, 506n.
    ^ Lawrence (2005), p. 239.
    ^ "Full transcript of bin Ladin's speech". Al Jazeera. November 4, 2004. Archived from the original on November 14, 2016. Retrieved August 24, 2016.
    ^ In his taped broadcast from January 2010, bin Laden said "Our attacks against you [the United States] will continue as long as U.S. support for Israel continues. ... The message sent to you with the attempt by the hero Nigerian Umar Farouk Abdulmutallab is a confirmation of our previous message conveyed by the heroes of September 11". Quoted from "Bin Laden: Attacks on U.S. to go on as long as it supports Israel" Archived December 16, 2016, at the Wayback Machine, in Haaretz.com
    ^ Bernard Lewis, 2004. In Bernard Lewis's 2004 book The Crisis of Islam: Holy War and Unholy Terror, he argues that animosity toward the West is best understood with the decline of the once powerful Ottoman empire, compounded by the import of western ideas – Arab socialism, Arab liberalism and Arab secularism
    ^ In "The spirit of terrorism", Jean Baudrillard described 9/11 as the first global event that "questions the very process of globalization". Baudrillard. "The spirit of terrorism". Archived from the original on May 28, 2010. Retrieved June 26, 2011.
    ^ In an essay entitled "Somebody Else's Civil War", Michael Scott Doran argues the attacks are best understood as part of a religious conflict within the Muslim world and that bin Laden's followers "consider themselves an island of true believers surrounded by a sea of iniquity". Hoping that U.S. retaliation would unite the faithful against the West, bin Laden sought to spark revolutions in Arab nations and elsewhere. Doran argues the Osama bin Laden videos attempt to provoke a visceral reaction in the Middle East and ensure that Muslim citizens would react as violently as possible to an increase in U.S. involvement in their region. (Doran, Michael Scott. "Somebody Else's Civil War". Foreign Affairs. No. January/February 2002. Archived from the original on April 23, 2015. Retrieved December 5, 2009. Reprinted in Hoge, James F.; Rose, Gideon (2005). Understanding the War on Terror. New York: Norton. pp. 72–75. ISBN 978-0-87609-347-4.)
    ^ In The Osama bin Laden I Know, Peter Bergen argues the attacks were part of a plan to cause the United States to increase its military and cultural presence in the Middle East, thereby forcing Muslims to confront the idea of a non-Muslim government and to eventually establish conservative Islamic governments in the region.(Bergen (2006), p. 229)
    ^ Lahoud, Nelly (2022). The Bin Laden Papers: How the Abbottabad Raid Revealed the Truth about al-Qaeda, Its Leader and His Family. New Haven (CT): Yale University Press. pp. 16–19, 307. ISBN 978-0-300-26063-2.
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    Wright, Lawrence (2006). The Looming Tower: Al-Qaeda and the Road to 9/11. New York: Alfred A. Knopf. ISBN 978-0-375-41486-2. OCLC 64592193.
    Yitzhak, Ronen (Summer 2016). "The War Against Terrorism and For Stability of the Hashemite Regime: Jordanian Intelligence Challenges in the 21st Century". International Journal of Intelligence and CounterIntelligence. 29 (2): 213–35. doi:10.1080/08850607.2016.1121038. S2CID 155138286.
    Further reading
    The 9/11 Commission Report: Final Report of the National Commission on Terrorist Attacks Upon the United States. National Commission on Terrorist Attacks. July 30, 2010. ISBN 978-1-61640-219-8.
    Atkins, Stephen E (2011). The 9/11 Encyclopedia. ABC-CLIO. ISBN 978-1-59884-921-9.
    Bolton, M. Kent (2006). U.S. National Security and Foreign Policymaking After 9/11: Present at the Re-creation. Rowman & Littlefield. ISBN 978-0-7425-5900-4.
    Caraley, Demetrios (2002). September 11, terrorist attacks, and U.S. foreign policy. Academy of Political Science. ISBN 978-1-884853-01-2.
    Chernick, Howard (2005). Resilient city: the economic impact of 9/11. Russell Sage Foundation. ISBN 978-0-87154-170-3.
    Damico, Amy M; Quay, Sara E. (2010). September 11 in Popular Culture: A Guide. Greenwood. ISBN 978-0-313-35505-9.
    Hampton, Wilborn (2003). September 11, 2001: attack on New York City. Candlewick Press. ISBN 978-0-7636-1949-7.
    Langley, Andrew (2006). September 11: Attack on America. Compass Point Books. ISBN 978-0-7565-1620-8.
    Neria, Yuval; Gross, Raz; Marshall, Randall D.; Susser, Ezra S. (2006). 9/11: mental health in the wake of terrorist attacks. Cambridge University Press. ISBN 978-0-521-83191-8.
    Ryan, Allan A. (2015). The 9/11 Terror Cases: Constitutional Challenges in the War against Al Qaeda. University Press of Kansas. ISBN 978-0-7006-2132-3.
    Strasser, Steven; Whitney, Craig R; United States. Congress. Senate. Select Committee on Intelligence, National Commission on Terrorist Attacks upon the United States (2004). The 9/11 investigations: staff reports of the 9/11 Commission: excerpts from the House-Senate joint inquiry report on 9/11: testimony from fourteen key witnesses, including Richard Clarke, George Tenet, and Condoleezza Rice. PublicAffairs. ISBN 978-1-58648-279-4.
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    National Commission on Terrorist Attacks Upon the United States official commission website
    List of victims
    September 11, 2001, Documentary Project from the U.S. Library of Congress, Memory.loc.gov
    September 11, 2001, Web Archive from the U.S. Library of Congress, Minerva
    National Security Archive
    September 11 Digital Archive: Saving the Histories of September 11, 2001, from the Center for History and New Media and the American Social History Project/Center for Media and Learning
    DoD: Khalid Sheikh Mohammed Verbatim Transcript of Combatant Status Review Tribunal Hearing for ISN 10024, from Wikisource
    The 9/11 Legacies Project, Oriental Institute, Czech Academy of Sciences, Prague
    9/11 at 20: A Week of Reflection, Responsible Statecraft, The Quincy Institute
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    From Wikipedia, the free encyclopedia

    For other events on the same date, see September 11 attacks (disambiguation).
    "9/11" redirects here. For the calendar dates, see September 11 and November 9. For the reverse, see 11/9 (disambiguation).
    September 11 attacks
    Part of terrorism in the United States
     
    United Airlines Flight 175 hits the South Tower
     
    Flight 77 hits The Pentagon
     
    Fuselage of Flight 93 in Stonycreek Township
     
    View of the collapsing North Tower
     
    Collapse of the 7 WTC
     
    World Trade Center site after the attacks
     
    The Pentagon building on fire
    Location
    Lower Manhattan, New York
    Arlington County, Virginia
    Stonycreek Township, Pennsylvania
    [a]
    Date
    September 11, 2001; 22 years ago
    c. 08:13 a.m.[b] – 10:03 a.m.[c] (EDT)
    Target
    North Tower
    (AA 11)
    South Tower
    (UA 175)
    The Pentagon
    (AA 77)
    U.S. Capitol Building or the White House
    (UA 93; unsuccessful due to passenger revolt)
    Attack type
    Islamic terrorism, aircraft hijacking, suicide attack, mass murder
    Deaths
    2,996
    (2,977 victims + 19 Al-Qaeda terrorists)
    Injured
    6,000–25,000+[d]
    Perpetrators
    Al-Qaeda led by Osama bin Laden (see also: responsibility)
    No. of participants
    19
    Motive
    Several; see Motives for the September 11 attacks and Fatawā of Osama bin Laden
    Convicted
    Zacarias Moussaoui
    Imad Yarkas
    Mounir el-Motassadeq (see also: Trials related to the September 11 attacks)
    September 11 attacks
     
    showTimeline
    showVictims
    showHijacked airliners
    showCrash sites
    showAftermath
    showResponse
    showPerpetrators
    showInquiries
    showCultural effects
    showMiscellaneous
    v
    t
    e
     
    showv
    t
    e
    al-Qaeda attacks
    The September 11 attacks, commonly known as 9/11,[e] were four coordinated Islamist suicide terrorist attacks carried out by Al-Qaeda against the United States on September 11, 2001. That morning, 19 terrorists hijacked four commercial airliners scheduled to travel from the East Coast to California. The hijackers crashed the first two planes into the Twin Towers of the World Trade Center in New York City, two of the world's five tallest buildings at the time, and aimed the next two flights toward targets in or near Washington, D.C., in an attack on the nation's capital. The third team succeeded in striking the Pentagon, the headquarters of the U.S. Department of Defense in Arlington County, Virginia, while the fourth plane crashed in rural Pennsylvania during a passenger revolt. The September 11 attacks killed 2,977 people, making them the deadliest terrorist attack in history, and instigated the multi-decade global war on terror, fought in Afghanistan, Iraq, and elsewhere.

    The first impact was that of American Airlines Flight 11, which ringleader Mohamed Atta flew into the North Tower of the World Trade Center complex in Lower Manhattan at 8:46 a.m.[f] Seventeen minutes later, at 9:03,[g] the World Trade Center's South Tower was hit by United Airlines Flight 175. Both 110-story skyscrapers collapsed within an hour and forty-one minutes,[h] bringing about the destruction of the remaining five structures in the WTC complex and damaging or destroying nearby buildings. A third flight, American Airlines Flight 77, crashed into the Pentagon at 9:37 a.m., causing a partial collapse. The fourth and final flight, United Airlines Flight 93, flew in the direction of the capital. Alerted to the previous attacks, the passengers fought for control, forcing the hijackers to nosedive the plane into a Stonycreek Township field, near Shanksville, at 10:03 a.m. Investigators determined that Flight 93's target was either the United States Capitol or the White House.

    That evening, the Central Intelligence Agency informed President George W. Bush that its Counterterrorism Center had identified the attacks as having been the work of Al-Qaeda under Osama bin Laden's leadership. The United States formally responded by launching the war on terror and invading Afghanistan to depose the Taliban, which rejected the conditions of U.S. terms to expel Al-Qaeda from Afghanistan and extradite its leaders. The U.S.'s invocation of Article 5 of the North Atlantic Treaty—its only usage to date—called upon allies to fight Al-Qaeda. As U.S. and NATO invasion forces swept through Afghanistan, bin Laden eluded them by disappearing into the White Mountains. He denied any involvement until 2004, when excerpts of a taped statement in which he accepted responsibility for the attacks were released. Al-Qaeda's cited motivations included U.S. support of Israel, the presence of U.S. military bases in Saudi Arabia and sanctions against Iraq. The nearly decade-long manhunt for bin Laden concluded on May 2, 2011, when he was killed during a U.S. military raid after being tracked down to his compound in Abbottabad, Pakistan. The war in Afghanistan continued for another eight years until the agreement was made in February 2020 for American and NATO troops to withdraw from the country, and the last members of the U.S. armed forces left the region on August 30, 2021, after which the Taliban returned to power. Ayman al-Zawahiri, another planner of the attacks who succeeded bin Laden as leader of Al-Qaeda, was killed by U.S. drone strikes in Kabul, Afghanistan on July 31, 2022.[14]

    Excluding the hijackers, the attacks killed 2,977 people, injured thousands more and gave rise to substantial long-term health consequences while also causing at least $10 billion in infrastructure and property damage. It remains the deadliest terrorist attack in history as well as the deadliest incident for firefighters and law enforcement personnel in US history, killing 343 and 72 members, respectively. The loss of life stemming from the impact of Flight 11 secured its place as the most lethal plane crash in aviation history followed by the death toll incurred by Flight 175. The destruction of the World Trade Center and its environs seriously harmed the U.S. economy and induced global market shocks. Many other countries strengthened anti-terrorism legislation and expanded their powers of law enforcement and intelligence agencies. Cleanup of the World Trade Center site (colloquially "Ground Zero") took eight months and was completed in May 2002, while the Pentagon was repaired within a year. After delays in the design of a replacement complex, construction of the One World Trade Center began in November 2006; it opened in November 2014. Memorials to the attacks include the National September 11 Memorial & Museum in New York City, The Pentagon Memorial in Arlington County, Virginia, and the Flight 93 National Memorial at the Pennsylvania crash site.

    Background
    Further information: Fatawā of Osama bin Laden and Political views of Osama bin Laden
    Al-Qaeda
    Main article: Al-Qaeda
    Further information: Jihad
    Al-Qaeda's origins can be traced to 1979, when the Soviet Union invaded Afghanistan.[15] Soon after the invasion, Osama bin Laden traveled to Afghanistan and helped organize Arab mujahideen (the "Afghan Arabs") to resist the "Communist invaders" (Soviets) until their exit from the country in 1989.[16][17] In 1984, bin Laden, along with Islamic scholar Abdullah Azzam, formed the Maktab al-Khidamat (MAK), an organization to support Arab mujahideen who came to join the jihad in Afghanistan.[15][18]

    The U.S. Central Intelligence Agency (CIA) funnelled several billion dollars worth of weapons to the indigenous Afghan mujahideen resistance, a portion of which bled to the Arab volunteers.[19] However, no direct evidence of U.S. aid to bin Laden or any of his affiliates was ever uncovered.[20]

    In 1996, bin Laden issued his first fatwā, which declared war against the United States and demanded the expulsion of all American soldiers from the Arabian Peninsula.[21] In a second 1998 fatwā, bin Laden outlined his objections to American foreign policy with respect to the State of Israel, as well as the continued presence of American troops in Saudi Arabia after the Gulf War.[22] Bin Laden maintained that Muslims are obliged to attack American targets until the aggressive policies of the U.S. against Muslims were reversed. According to bin Laden, Islamic jurists had "throughout Islamic history unanimously agreed that the jihad is an individual duty if the enemy destroys the Muslim countries".[22][23]

    The Hamburg cell in Germany included Islamists who eventually came to be key operatives in the 9/11 attacks.[24] Mohamed Atta; Marwan al-Shehhi; Ziad Jarrah; Ramzi bin al-Shibh; and Said Bahaji were all members of Al-Qaeda's Hamburg cell.[25] Bin Laden asserted that all Muslims must wage a defensive war against the United States, and combat American aggression. He further argued that military strikes against American assets would send a message to the American people, attempting to force the U.S. to re-evaluate its support to Israel, and other aggressive policies.[26] In a 1998 interview with American journalist John Miller, bin Laden stated:

    [W]e tell the Americans as people and we tell the mothers of soldiers and American mothers in general that if they value their lives and the lives of their children, to find a nationalistic government that will look after their interests and not the interests of the Jews. The continuation of tyranny will bring the fight to America, as [the 1993 World Trade Center bomber] Ramzi [Yousef] yourself and others did. This is my message to the American people: to look for a serious government that looks out for their interests and does not attack others, their lands, or their honour. My word to American journalists is not to ask why we did that but to ask what their government has done that forced us to defend ourselves.

    — Osama bin Laden, in his interview with John Miller, May 1998, [27]
    Osama bin Laden
    Main article: Osama bin Laden
    Further information: Militant career of Osama bin Laden
     Osama bin Laden in 1997–1998
    Bin Laden orchestrated the September 11 attacks. He initially denied involvement, but later recanted his denial.[28][29][30] Al Jazeera broadcast a statement by him on September 16, 2001: "I stress that I have not carried out this act, which appears to have been carried out by individuals with their own motivation".[31] In November 2001, U.S. forces recovered a videotape from a destroyed house in Jalalabad, Afghanistan. In the video, bin Laden, talking to Khaled al-Harbi, admitted foreknowledge of the attacks.[32] On December 27, 2001, a second video of bin Laden was released in which he, stopping short of admitting responsibility for the attacks, said:[33]

    It has become clear that the West in general and America in particular have an unspeakable hatred for Islam. ... It is the hatred of crusaders. Terrorism against America deserves to be praised because it was a response to injustice, aimed at forcing America to stop its support for Israel, which kills our people. ... We say that the end of the United States is imminent, whether Bin Laden or his followers are alive or dead, for the awakening of the Muslim ummah [nation] has occurred. ... It is important to hit the economy (of the United States), which is the base of its military power...If the economy is hit they will become reoccupied.

    — Osama bin Laden
    Shortly before the 2004 U.S. presidential election, bin Laden used a taped statement to publicly acknowledge Al-Qaeda's involvement in the attacks.[28] He admitted his direct link to the attacks and said they were carried out because:

    The events that affected my soul in a direct way started in 1982 when America permitted the Israelis to invade Lebanon and the American Sixth Fleet helped them in that. This bombardment began and many were killed and injured and others were terrorised and displaced.

    I couldn't forget those moving scenes, blood and severed limbs, women and children sprawled everywhere. Houses were destroyed along with their occupants high rises demolished over their residents, rockets raining down on our home without mercy...As I looked at those demolished towers in Lebanon, it entered my mind that we should punish the oppressor in kind and that we should destroy towers in America so that they taste some of what we tasted and so that they be deterred from killing our women and children.

    And that day, it was confirmed to me that oppression and the intentional killing of innocent women and children is a deliberate American policy. Destruction is freedom and democracy, while resistance is terrorism and intolerance.[34]
    Bin Laden personally directed his followers to attack the World Trade Center and the Pentagon.[35][36] Another video obtained by Al Jazeera in September 2006 showed bin Laden with one of the attacks' chief planners, Ramzi bin al-Shibh, as well as hijackers, Hamza al-Ghamdi and Wail al-Shehri, amidst making preparations for the attacks.[37] Bin Laden had been on the FBI's Most Wanted List since 1998 for the 1998 bombings of the U.S. embassies in Tanzania and Kenya.[38][39]

    Khalid Sheikh Mohammed and other Al-Qaeda members
    Main article: Khalid Sheikh Mohammed
     Khalid Sheikh Mohammed after his 2003 capture in Rawalpindi, Pakistan
    Journalist Yosri Fouda of the Arabic television channel Al Jazeera reported that in April 2002 Al-Qaeda member Khalid Sheikh Mohammed admitted his involvement in the attacks, along with Ramzi bin al-Shibh.[40][41][42] The 2004 9/11 Commission Report determined that Mohammed's animosity towards the United States, the principal architect of the 9/11 attacks, stemmed from his "violent disagreement with U.S. foreign policy favoring Israel".[43] Mohammed was also an adviser and financier of the 1993 World Trade Center bombing and the uncle of Ramzi Yousef, the lead bomber in that attack.[44][45] In late 1994, Mohammed and Yousef moved on to plan a new terrorist attack called the Bojinka plot planned for January 1995. Despite a failure and Yousef's capture by U.S. forces the following month, the Bojinka plot would influence the later 9/11 attacks.[46]

    In "Substitution for Testimony of Khalid Sheikh Mohammed" from the trial of Zacarias Moussaoui, five people are identified as having been completely aware of the operation's details. They are bin Laden; Khalid Sheikh Mohammed; Ramzi bin al-Shibh; Abu Turab al-Urduni; and Mohammed Atef.[47]

    Motives
    Main article: Motives for the September 11 attacks
    Further information: Fatwa of Osama bin Laden
    Osama bin Laden's declaration of a holy war against the United States, and a 1998 fatwā signed by bin Laden and others that called for the killing of Americans,[22][48] are seen by investigators as evidence of his motivation.[49] During his interview with Hamid Mir in November 2001, Bin Laden defended the September 11 attacks as retaliatory strikes against American atrocities against Muslims across the world. He also maintained that the attacks were not directed against women and children, asserting that the targets of the strikes were symbols of America's "economic and military power".[50][51]

    In bin Laden's November 2002 "Letter to the American people", he explicitly stated that al-Qaeda's motives for the attacks included:

    U.S. support of Israel[52][53]
    Bin Laden's strategy to support and globally expand the Al-Aqsa Intifada[54][55][56][57]
    Attacks against Muslims by U.S.-led coalition in Somalia
    U.S. support of the government of Philippines against Muslims in the Moro conflict
    U.S. support for the Israeli occupation of Southern Lebanon
    U.S. support of Russian atrocities against Muslims in Chechnya
    Pro-American governments in the Middle East (who "act as your agents") being against Muslim interests
    U.S. support of Indian oppression against Muslims in Kashmir
    The presence of U.S. troops in Saudi Arabia[58]
    The sanctions against Iraq[52]
    Environmental destruction[59][60][61]
    After the attacks, bin Laden and Ayman al-Zawahiri released additional videotapes and audio recordings, some of which repeated the above reasons for the attacks. Two relevant publications were bin Laden's 2002 "Letter to the American people"[62] and a 2004 videotape by bin Laden.[63]

    [...] those young men, for whom God has cleared the way, didn't set out to kill children, but rather attacked the biggest centre of military power in the world, the Pentagon, which contains more than 64,000 workers, a military base which has a big concentration of army and intelligence ... As for the World Trade Center, the ones who were attacked and who died in it were part of a financial power. It wasn't a children's school! Neither was it a residence. The consensus is that most of the people who were in the towers were men who backed the biggest financial force in the world, which spreads mischief throughout the world.
    — Osama Bin Laden's interview with Tayseer Allouni, 21 October 2001[64]
    As an adherent of Islam, bin Laden believed that non-Muslims are forbidden from having a permanent presence in the Arabian Peninsula.[65] In 1996, bin Laden issued a fatwā calling for American troops to leave Saudi Arabia. In 1998, Al-Qaeda wrote "For over seven years the United States has been occupying the lands of Islam in the holiest of places, the Arabian Peninsula, plundering its riches, dictating to its rulers, humiliating its people, terrorizing its neighbours, and turning its bases in the Peninsula into a spearhead through which to fight the neighbouring Muslim peoples".[66]

    In a December 1999 interview, bin Laden said he felt that Americans were "too near to Mecca", and considered this a provocation to the entire Muslim world.[67] One analysis of suicide terrorism suggested that without U.S. troops in Saudi Arabia, Al-Qaeda likely would not have been able to get people to commit to suicide missions.[68]

    In the 1998 fatwā, Al-Qaeda identified the Iraq sanctions as a reason to kill Americans, condemning the "protracted blockade" among other actions that constitute a declaration of war against "Allah, his messenger, and Muslims".[66] The fatwā declared that "the ruling to kill the Americans and their allies – civilians and military – is an individual duty for every Muslim who can do it in any country in which it is possible to do it, in order to liberate the al-Aqsa Mosque and the holy mosque of Mecca from their grip, and in order for their [the Americans'] armies to move out of all the lands of Islam, defeated and unable to threaten any Muslim".[22][69]

    In 2004, bin Laden claimed that the idea of destroying the towers had first occurred to him in 1982 when he witnessed Israel's bombardment of high-rise apartment buildings during the 1982 Lebanon War.[70][71] Some analysts, including political scientists John Mearsheimer and Stephen Walt, also claimed that U.S. support of Israel was a motive for the attacks.[53][67] In 2004 and 2010, bin Laden again connected the September 11 attacks with U.S. support of Israel, although most of the letters expressed bin Laden's disdain for President Bush and bin Laden's hope to "destroy and bankrupt" the U.S.[72][73]

    Other motives have been suggested in addition to those stated by bin Laden and Al-Qaeda. Some authors suggested the "humiliation" that resulted from the Islamic world falling behind the Western world – this discrepancy was rendered especially visible by globalization[74][75] and a desire to provoke the U.S. into a broader war against the Islamic world in the hope of motivating more allies to support Al-Qaeda. Similarly, others have argued the 9/11 attacks were a strategic move to provoke America into a war that would incite a pan-Islamic revolution.[76][77]

    Documents seized during the 2011 operation that killed bin Laden included a few notes handwritten by bin Laden in September 2002 with the heading "The Birth of the Idea of September 11". In these notes, he describes how he was inspired by the crash of EgyptAir Flight 990 on October 31, 1999, which was deliberately crashed by co-pilot Gameel Al-Batouti. "This is how the idea of 9/11 was conceived and developed in my head, and that is when we began the planning" bin Laden continued, adding that no one but Abu Hafs and Abu al-Khair knew about it at the time. The 9/11 Commission Report identified Khalid Sheikh Mohammed as the architect of 9/11, but he is not mentioned in bin Laden's notes.[78]

    Planning
    Main article: Planning of the September 11 attacks
     Map of the attacks on the World Trade Center
     Diagram of the World Trade Center attacks
    The attacks were conceived by Khalid Sheikh Mohammed, who first presented it to Osama bin Laden in 1996.[79] At that time, bin Laden and Al-Qaeda were in a period of transition, having just relocated back to Afghanistan from Sudan.[80] The 1998 African embassy bombings and bin Laden's February 1998 fatwā marked a turning point of Al-Qaeda's terrorist operation,[81] as bin Laden became intent on attacking the United States.

    In late 1998 or early 1999, bin Laden approved Mohammed to go forward with organizing the plot.[82] Mohammed, bin Laden, and Mohammed Atef, bin Laden's deputy, held a series of meetings in early 1999.[83] Atef provided operational support, including target selections and helping arrange travel for the hijackers.[80] Bin Laden overruled Mohammed, rejecting potential targets such as the U.S. Bank Tower in Los Angeles for lack of time.[84][85]

    Bin Laden provided leadership and financial support and was involved in selecting participants.[86] He initially selected Nawaf al-Hazmi and Khalid al-Mihdhar, both experienced jihadists who had fought in Bosnia. Hazmi and Mihdhar arrived in the United States in mid-January 2000. In early 2000, Hazmi and Mihdhar took flying lessons in San Diego, California. Both spoke little English, performed poorly in flying lessons, and eventually served as secondary "muscle" hijackers.[87][88]

    In late 1999, a group of men from Hamburg, Germany, arrived in Afghanistan. The group included Mohamed Atta, Marwan al-Shehhi, Ziad Jarrah, and Ramzi bin al-Shibh.[89] Bin Laden selected these men because they were educated, could speak English, and had experience living in the West.[90] New recruits were routinely screened for special skills and Al-Qaeda leaders consequently discovered that Hani Hanjour already had a commercial pilot's license.[91] Mohammed later said that he helped the hijackers blend in by teaching them how to order food in restaurants and dress in Western clothing.[92]

    Hanjour arrived in San Diego on December 8, 2000, joining Hazmi.[93]: 6–7  They soon left for Arizona, where Hanjour took refresher training.[93]: 7  Marwan al-Shehhi arrived at the end of May 2000, while Atta arrived on June 3, 2000, and Jarrah arrived on June 27, 2000.[93]: 6  Bin al-Shibh applied several times for a visa to the United States, but as a Yemeni, he was rejected out of concerns he would overstay his visa.[93]: 4, 14  Bin al-Shibh stayed in Hamburg, providing coordination between Atta and Mohammed.[93]: 16  The three Hamburg cell members all took pilot training in South Florida at Huffman Aviation.[93]: 6 

    In the spring of 2001, the secondary hijackers began arriving in the United States.[94] In July 2001, Atta met with bin al-Shibh in Tarragona, Catalonia, Spain, where they coordinated details of the plot, including final target selection. Bin al-Shibh also passed along bin Laden's wish for the attacks to be carried out as soon as possible.[95] Some of the hijackers received passports from corrupt Saudi officials who were family members or used fraudulent passports to gain entry.[96]

    There have been a few theories that 9/11 was selected by the hijackers as the date of the attack because it resembled 9-1-1, the phone number used to report emergencies in the United States. However, Lawrence Wright wrote that the hijackers chose the date when John III Sobieski, the King of Poland and Grand Duke of Lithuania, began the battle that turned back the Ottoman Empire's Muslim armies that were attempting to capture Vienna (present-day capital of Austria) on 11 September 1683. During 1683, Vienna was the seat of the Holy Roman Empire and Habsburg monarchy, both major powers in Europe at the time. For Osama bin Laden, this was a date when the West gained some dominance over Islam, and by attacking on this date, he hoped to make a step in Islam "winning" the war for worldwide power and influence.[97]

    Prior intelligence
    Main article: September 11 intelligence before the attacks
    In late 1999, Al-Qaeda associate Walid bin Attash ("Khallad") contacted Mihdhar and told him to meet in Kuala Lumpur, Malaysia; Hazmi and Abu Bara al Yemeni would also be in attendance. The NSA intercepted a telephone call mentioning the meeting, Mihdhar, and the name "Nawaf" (Hazmi); while the agency feared "Something nefarious might be afoot", it took no further action.

    The CIA had already been alerted by Saudi intelligence about the status of Mihdhar and Hazmi as Al-Qaeda members and a CIA team broke into Mihdhar's Dubai hotel room and discovered that Mihdhar had a U.S. visa. While Alec Station alerted intelligence agencies worldwide about this fact, it did not share this information with the FBI. The Malaysian Special Branch observed the January 5, 2000, meeting of the two Al-Qaeda members and informed the CIA that Mihdhar, Hazmi, and Khallad were flying to Bangkok, but the CIA never notified other agencies of this, nor did it ask the State Department to put Mihdhar on its watchlist. An FBI liaison to Alec Station asked permission to inform the FBI of the meeting but was told: "This is not a matter for the FBI".[98]

    By late June, senior counter-terrorism official Richard Clarke and CIA director George Tenet were "convinced that a major series of attacks was about to come", although the CIA believed the attacks would likely occur in Saudi Arabia or Israel.[99] In early July, Clarke put domestic agencies on "full alert", telling them, "Something spectacular is going to happen here, and it's going to happen soon". He asked the FBI and the State Department to alert the embassies and police departments, and the Defense Department to go to "Threat Condition Delta".[100][101] Clarke later wrote: "Somewhere in CIA there was information that two known al Qaeda terrorists had come into the United States. Somewhere in the FBI, there was information that strange things had been going on at flight schools in the United States ... They had specific information about individual terrorists from which one could have deduced what was about to happen. None of that information got to me or the White House".[102]

    [...] by July [2001], with word spreading of a coming attack, a schism emerged among the senior leadership of al Qaeda. Several senior members reportedly agreed with Mullah Omar. Those who reportedly sided with bin Ladin included Atef, Sulayman Abu Ghayth, and KSM. But those said to have opposed him were weighty figures in the organization-including Abu Hafs the Mauritanian, Sheikh Saeed al Masri, and Sayf al Adl. One senior al Qaeda operative claims to recall Bin Ladin arguing that attacks against the United States needed to be carried out immediately to support insurgency in the Israeli-occupied territories and protest the presence of U.S. forces in Saudi Arabia.
    — 9/11 Commission Report, pp. 251[103]
    On July 13, Tom Wilshire, a CIA agent assigned to the FBI's international terrorism division, emailed his superiors at the CIA's Counterterrorism Center (CTC) requesting permission to inform the FBI that Hazmi was in the country and that Mihdhar had a U.S. visa. The CIA never responded.[104]

    The same day in July, Margarette Gillespie, an FBI analyst working in the CTC, was told to review material about the Malaysia meeting. She was not told of the participant's presence in the U.S. The CIA gave Gillespie surveillance photos of Mihdhar and Hazmi from the meeting to show to FBI counterterrorism but did not tell her their significance. The Intelink database informed her not to share intelligence material at the meeting with criminal investigators. When shown the photos, the FBI refused more details on their significance, and they were not given Mihdhar's date of birth or passport number.[105] In late August 2001, Gillespie told the INS, the State Department, the Customs Service, and the FBI to put Hazmi and Mihdhar on their watchlists, but the FBI was prohibited from using criminal agents in searching for the duo, hindering their efforts.[106]

    Also in July, a Phoenix-based FBI agent sent a message to FBI headquarters, Alec Station, and FBI agents in New York alerting them to "the possibility of a coordinated effort by Osama bin Laden to send students to the United States to attend civil aviation universities and colleges". The agent, Kenneth Williams, suggested the need to interview all flight school managers and identify all Arab students seeking flight training.[107] In July, Jordan alerted the U.S. that Al-Qaeda was planning an attack on the U.S.; "months later", Jordan notified the U.S. that the attack's codename was "The Big Wedding" and that it involved aeroplanes.[108]

    On August 6, 2001, the CIA's Presidential Daily Brief ("PDB"), designated "For the President Only", was entitled Bin Ladin Determined to Strike in US. The memo noted that FBI information "indicates patterns of suspicious activity in this country consistent with preparations for hijackings or other types of attacks".[109]

    In mid-August, one Minnesota flight school alerted the FBI about Zacarias Moussaoui, who had asked "suspicious questions". The FBI found that Moussaoui was a radical who had travelled to Pakistan, and the INS arrested him for overstaying his French visa. Their request to search his laptop was denied by FBI headquarters due to the lack of probable cause.[110]

    The failures in intelligence-sharing were attributed to 1995 Justice Department policies limiting intelligence-sharing, combined with CIA and NSA reluctance to reveal "sensitive sources and methods" such as tapped phones.[111] Testifying before the 9/11 Commission in April 2004, then – Attorney General John Ashcroft recalled that the "single greatest structural cause for the September 11th problem was the wall that segregated or separated criminal investigators and intelligence agents".[112] Clarke also wrote: "[T]here were... failures to get information to the right place at the right time".[113]

    Attacks
    For a chronological guide, see Timeline for the day of the September 11 attacks.
    Early on the morning of Tuesday, September 11, 2001, nineteen hijackers took control of four commercial airliners (two Boeing 757s and two Boeing 767s) en route to California after takeoffs from Logan International Airport in Boston, Massachusetts; Newark Liberty International Airport in Newark, New Jersey; and Washington Dulles International Airport in Loudoun and Fairfax counties in Virginia.[114] Large planes with long coast-to-coast flights were selected for hijacking because they would have more fuel.[115]

    Key info about the four flights
    Operator
    Flight number
    Aircraft type
    Time of departure*
    Time of crash*
    Departed from
    En route to
    Crash site
    Fatalities
    (There were no survivors from the flights)
    Crew
    Passengers†
    Ground§
    Hijackers
    Total‡
    American Airlines
    11
    Boeing 767-223ER
    7:59 a.m.
    8:46 a.m.
    Logan International Airport
    Los Angeles International Airport
    North Tower of the World Trade Center, floors 93 to 99
    11
    76
    2,606
    5
    2,763
    United Airlines
    175
    Boeing 767–222
    8:14 a.m.
    9:03 a.m.[g]
    Logan International Airport
    Los Angeles International Airport
    South Tower of the World Trade Center, floors 77 to 85
    9
    51
    5
    American Airlines
    77
    Boeing 757–223
    8:20 a.m.
    9:37 a.m.
    Washington Dulles International Airport
    Los Angeles International Airport
    West wall of Pentagon
    6
    53
    125
    5
    189
    United Airlines
    93
    Boeing 757–222
    8:42 a.m.
    10:03 a.m.
    Newark Int'l Airport
    San Francisco International Airport
    Field in Stonycreek Township near Shanksville
    7
    33
    0
    4
    44
    Totals
    33
    213
    2,731
    19
    2,996
    * Eastern Daylight Time (UTC−04:00)
    † Excluding hijackers
    § Including emergency workers
    ‡ Including hijackers

    The four crashes
    See also: Media documentation of the September 11 attacks
    Duration: 52 seconds.0:52
    United Airlines Flight 175 crashes into 2 World Trade Center
    At 7:59 a.m., American Airlines Flight 11 took off from Logan International Airport in Boston.[116] Fifteen minutes into the flight, five hijackers armed with boxcutters took over the plane, injuring at least three people (and possibly killing one)[117][118][119] before forcing their way into the cockpit. The terrorists also displayed an apparent explosive and sprayed mace into the cabin, to frighten the hostages into submission and further hinder resistance.[120] Back at Logan, United Airlines Flight 175 took off at 8:14 a.m., approximately the same time as Flight 11's hijacking.[121] Hundreds of miles southwest at Dulles International Airport, American Airlines Flight 77 left the runway at 8:20 a.m.[121] Flight 175's journey proceeded normally for 28 minutes until 8:42 a.m., when a group of five hijacked the plane, murdering both pilots and stabbing several crew members before assuming control of the aircraft. These hijackers also used bomb threats to instil fear into the passengers and crew,[122] also spraying chemical weapons to disable any opposition.[123] Concurrently, United Airlines Flight 93 departed from Newark International Airport in New Jersey;[121] originally scheduled to pull away from the gate at 8:00 a.m., the plane was running 42 minutes late.

    At 8:46 a.m., Flight 11 was deliberately crashed into the north face of the World Trade Center's North Tower (1 WTC),[124] although the initial presumption by many was that this was merely an accident.[125] At 8:51 a.m., American Airlines Flight 77 was also taken over by another group of five who forcibly entered the cockpit 31 minutes after takeoff.[126] Although the hijackers on this flight were equipped with knives,[127] there were no reports of anyone on board being stabbed, nor did the two people who made phone calls mention the use of mace or a bomb threat.

    Seventeen minutes after the first plane crashed into the North Tower, Flight 175 was flown into the South Tower's southern facade (2 WTC)[128] at 9:03 a.m.,[g] demonstrating that the first crash was not an accident, but rather a terrorist attack.[129][130]

    Four men aboard Flight 93 struck suddenly, killing at least one passenger, after having waited 46 minutes to make their move—a holdup that proved disastrous for the terrorists when combined with the delayed takeoff from the runway;[131] they stormed the cockpit and seized control of the plane at 9:28 a.m., turning the plane eastbound and setting course for Washington, D.C.[132] Much like their counterparts on the first two flights, the fourth team also used bomb threats and filled the cabin with mace.[133]

    Nine minutes after Flight 93's hijacking, Flight 77 crashed into the west side of the Pentagon.[134] Because of the two delays,[135] the passengers and crew of Flight 93 had time to be made aware of the previous attacks through phone calls to the ground, and as a result an uprising was hastily organized to take control of the aircraft at 9:57 a.m.[136] Within minutes, passengers had fought their way to the front of the cabin and began breaking down the cockpit door. Fearing their captives would gain the upper hand, the hijackers rolled the plane and pitched it into a nosedive,[137][138] crashing into a field near Shanksville, Pennsylvania, southeast of Pittsburgh, at 10:03 a.m. The plane was about twenty minutes away from reaching D.C. at the time of the crash, and its target is believed to have been either the Capitol Building or the White House.[115][136]

    Some passengers and crew members who called from the aircraft using the cabin air phone service and mobile phones provided details: several hijackers were aboard each plane; they used mace, tear gas, or pepper spray to overcome attendants; and some people aboard had been stabbed.[139] Reports indicated hijackers stabbed and killed pilots, flight attendants, and one or more passengers.[114][140] According to the 9/11 Commission's final report, the hijackers had recently purchased multi-function hand tools and assorted Leatherman-type utility knives with locking blades (which were not forbidden to passengers at the time), but these were not found among the possessions left behind by the hijackers.[141][142] A flight attendant on Flight 11, a passenger on Flight 175, and passengers on Flight 93 said the hijackers had bombs, but one of the passengers said he thought the bombs were fake. The FBI found no traces of explosives at the crash sites, and the 9/11 Commission concluded that the bombs were probably fake.[114] On at least two of the hijacked flights—American 11 and United 93—the terrorists claimed over the PA system that they were taking hostages and were returning to the airport to have a ransom demand met, a clear attempt to prevent passengers from fighting back. Both attempts failed, however, as both hijacker pilots in these instances (Mohamed Atta[143] and Ziad Jarrah,[144] respectively) keyed the wrong switch and mistakenly transmitted their messages to ATC instead of the people on the plane as intended, tipping off the flight controllers that the planes had been hijacked.

     Duration: 3 minutes and 12 seconds.3:12Security camera footage of American Airlines Flight 77 crashing into the Pentagon;[145] the plane collides with The Pentagon approximately 86 seconds after the start of the recording
    Three buildings in the World Trade Center collapsed due to fire-induced structural failure. Although the South Tower was struck 17 minutes after the North Tower, the plane's impact zone was far lower, at a much faster speed, and into a corner, with the unevenly-balanced additional structural weight causing it to collapse first at 9:59 a.m.,[146]: 80 [147]: 322  having burned for 56 minutes[i] in the fire caused by the crash of United Airlines Flight 175 and the explosion of its fuel. The North Tower lasted another 29 minutes before collapsing at 10:28 a.m.,[j] one hour and forty-two minutes[h] after being struck by American Airlines Flight 11. When the North Tower collapsed, debris fell on the nearby 7 World Trade Center building (7 WTC), damaging the building and starting fires. These fires burned for nearly seven hours, compromising the building's structural integrity, and 7 WTC collapsed at 5:21 p.m.[151][152] The west side of the Pentagon sustained significant damage.

    At 9:42 a.m., the Federal Aviation Administration (FAA) grounded all civilian aircraft within the continental U.S., and civilian aircraft already in flight were told to land immediately.[153] All international civilian aircraft were either turned back or redirected to airports in Canada or Mexico, and were banned from landing on United States territory for three days.[154] The attacks created widespread confusion among news organizations and air traffic controllers. Among unconfirmed and often contradictory news reports aired throughout the day, one of the most prevalent claimed a car bomb had been detonated at the U.S. State Department's headquarters in Washington, D.C.[155] Another jet (Delta Air Lines Flight 1989) was suspected of having been hijacked, but the aircraft responded to controllers and landed safely in Cleveland, Ohio.[156]

    In an April 2002 interview, Khalid Sheikh Mohammed and Ramzi bin al-Shibh, who are believed to have organized the attacks, said Flight 93's intended target was the United States Capitol, not the White House.[157] During the planning stage of the attacks, Mohamed Atta (Flight 11's hijacker and pilot) thought the White House might be too tough a target and sought an assessment from Hani Hanjour (who hijacked and piloted Flight 77).[158] Mohammed said Al-Qaeda initially planned to target nuclear installations rather than the World Trade Center and the Pentagon, but decided against it, fearing things could "get out of control".[159] Final decisions on targets, according to Mohammed, were left in the hands of the pilots.[158] If any pilot could not reach his intended target, he was to crash the plane.[115]

    Casualties
    Main articles: Casualties of the September 11 attacks and Lists of victims of the September 11 attacks
     One of three observable falls from the South Tower.[160] A similar photograph of a victim from the North Tower titled The Falling Man gained wide acclamation.
    The attack on the World Trade Center's North Tower single-handedly[k] made 9/11 the deadliest act of terrorism in world history.[162] Taken together, the four crashes caused the deaths of 2,996 people (including the hijackers) and injured thousands more.[163] The death toll included 265 on the four planes (from which there were no survivors); 2,606 in the World Trade Center and in the surrounding area; and 125 at The Pentagon.[164][165] Most who died were civilians, as well as 343 firefighters, 72 law enforcement officers, 55 military personnel, and the 19 terrorists.[166][167] After New York, New Jersey lost the most state citizens.[168] More than 90 countries lost citizens in the attacks.[169]

    In New York City, more than 90% of the workers and visitors who died in the towers had been at or above the points of impact. In the North Tower, between 1,344[170] and 1,402[171] people were at, above or one floor below the point of impact and all died. Hundreds were killed instantly the moment the plane struck.[172] The estimated 800 people[173] who survived the impact were trapped and died in the fires or from smoke inhalation; fell or jumped from the tower to escape the smoke and flames; or were killed in the building's collapse. The destruction of all three staircases in the North Tower when Flight 11 hit made it impossible for anyone from the impact zone upward to escape. 107 people not trapped by the impact died.[174] When the plane struck between floors 93 and 99, the 92nd floor was also rendered inescapable when the crash severed all elevator shafts while debris falling from the impact zone blocked the stairwells, ensuring the deaths of all 69 workers on the floor below the point of impact.

    In the South Tower, around 600 people were on or above the 77th floor when Flight 175 struck and few survived. As with the North Tower, hundreds were killed at the moment of impact. Unlike those in the North Tower, the estimated 300 survivors[173] of the crash were not technically trapped by the damage done by Flight 175's impact, but most were either unaware that a means of escape still existed or were unable to use it. One stairway, Stairwell A, narrowly avoided being destroyed as Flight 175 crashed through the building, allowing 14 people located on the floors of impact (including Stanley Praimnath, a man who saw the plane coming at him) and four more from the floors above to escape. New York City 9-1-1 operators who received calls from people inside the tower were not well informed of the situation as it rapidly unfolded and as a result, told callers not to descend the tower on their own.[175] In total, 630 people died in the South Tower, fewer than half the number killed in the North Tower.[174] Of the 100–200 people witnessed jumping or falling to their deaths that morning,[176] only three recorded sightings were from the South Tower.[177]: 86  Casualties in the South Tower were significantly reduced because some occupants decided to leave the building immediately following the first crash, and because Eric Eisenberg, an executive at AON Insurance, made the decision to evacuate the floors occupied by AON (floors 92 and 98–105) in the moments following the impact of Flight 11. The 17-minute gap allowed over 900 of the 1,100 AON employees present on-site to evacuate from above the 77th floor before the South Tower was struck; Eisenberg was among the nearly 200 who did not escape. Similar pre-impact evacuations were carried out by companies such as Fiduciary Trust, CSC, and Euro Brokers, all of whom had offices on floors above the point of impact. The failure to order a full evacuation of the South Tower after the first plane crash into the North Tower was described by USA Today as "one of the day's great tragedies".[178]

    As exemplified in the photograph The Falling Man, more than 200 people fell to their deaths from the burning towers, most of whom were forced to jump to escape the extreme heat, fire and smoke.[179] Some occupants of each tower above the point of impact made their way toward the roof in the hope of helicopter rescue, but the roof access doors were locked.[180] No plan existed for helicopter rescues, and the combination of roof equipment, thick smoke and intense heat prevented helicopters from approaching.[181]

    At the World Trade Center complex, a total of 414 emergency workers died as they tried to rescue people and fight fires, while another law enforcement officer was separately killed when United 93 crashed. The New York City Fire Department (FDNY) lost 343 firefighters, including a chaplain and two paramedics.[182][183][184] The New York City Police Department (NYPD) lost 23 officers.[185] The Port Authority Police Department (PAPD) lost 37 officers.[186] Eight emergency medical technicians (EMTs) and paramedics from private emergency medical services (EMS) units were killed.[187] Almost all of the emergency personnel who died at the scene that day were killed as a result of the towers collapsing, with the exception of one who was struck by a civilian falling from the upper floors of the South Tower.[188]

    Cantor Fitzgerald L.P. (an investment bank on the North Tower's 101st–105th floors) lost 658 employees, considerably more than any other employer.[189] Marsh Inc., located immediately below Cantor Fitzgerald on floors 93–100, lost 358 employees,[190][191] and 175 employees of Aon Corporation were also killed.[192] The National Institute of Standards and Technology (NIST) estimated that about 17,400 civilians were in the World Trade Center complex at the time of the attacks. Turnstile counts from the Port Authority suggest 14,154 people were typically in the Twin Towers by 8:45 a.m.[193][page needed][194] Most people below the impact zone safely evacuated the buildings.[195]

    In Arlington County, Virginia, 125 Pentagon workers died when Flight 77 crashed into the building's western side. 70 were civilians and 55 were military personnel, many of whom worked for the United States Army or the United States Navy. The Army lost 47 civilian employees; six civilian contractors; and 22 soldiers, while the Navy lost six civilian employees; three civilian contractors; and 33 sailors. Seven Defense Intelligence Agency (DIA) civilian employees died, and one Office of the Secretary of Defense (OSD) contractor.[196][197][198] Lieutenant General Timothy Maude, an Army Deputy Chief of Staff, was the highest-ranking military official killed at the Pentagon.[199]

    Weeks after the attack, the death toll was estimated to be over 6,000, more than twice the number of deaths eventually confirmed.[200] The city was only able to identify remains for about 1,600 of the World Trade Center victims. The medical examiner's office collected "about 10,000 unidentified bone and tissue fragments that cannot be matched to the list of the dead".[201] Bone fragments were still being found in 2006 by workers who were preparing to demolish the damaged Deutsche Bank Building.

    In 2010, a team of anthropologists and archaeologists searched for human remains and personal items at the Fresh Kills Landfill, where 72 more human remains were recovered, bringing the total found to 1,845. DNA profiling continues in an attempt to identify additional victims.[202][203][204] The remains are being held in storage in Memorial Park, outside the New York City Medical Examiner's facilities. It was expected that the remains would be moved in 2013 to a repository behind a wall at the 9/11 museum.[needs update][205]

    In July 2011, a team of scientists at the Office of Chief Medical Examiner continued efforts to identify remains, in the hope that improved technology will allow them to identify other victims.[204] In August 2017, the 1,641st victim was identified as a result of newly available DNA technology,[206] and a 1,642nd during July 2018.[207] Three more victims were identified in October 2019,[208] two in September 2021[209] and an additional two in September 2023.[210] As of September 2023, 1,104 victims remain unidentified,[210] amounting to 40% of the deaths in the World Trade Center attacks.[209] On September 25, 2023, the FDNY reported that with the death of EMT Hilda Vannata and retired firefighter Robert Fulco, marking the 342nd and 343rd deaths from 9/11-related illnesses, the department had now lost the same number of firefighters, EMTs, and civilian members to 9/11-related illnesses as it did on the day of the attacks.[211][212]

    Damage
    Further information: Collapse of the World Trade Center
     The World Trade Center site, called Ground Zero, with an overlay showing the original buildings' locations
    Along with the 110-floor Twin Towers, numerous other buildings at the World Trade Center site were destroyed or badly damaged, including WTC buildings 3 through 7 and St. Nicholas Greek Orthodox Church.[213] The North Tower, South Tower, the Marriott Hotel (3 WTC), and 7 WTC were destroyed. The U.S. Customs House (6 World Trade Center), 4 World Trade Center, 5 World Trade Center, and both pedestrian bridges connecting buildings were severely damaged. The Deutsche Bank Building (still popularly referred to as the Bankers Trust Building) on 130 Liberty Street was partially damaged and demolished some years later, starting in 2007.[214][215] The two buildings of the World Financial Center also suffered damage.[214] The last fires at the World Trade Center site were extinguished on December 20, exactly 100 days after the attacks.[216]

    The Deutsche Bank Building across Liberty Street from the World Trade Center complex was later condemned as uninhabitable because of toxic conditions inside the office tower and was deconstructed.[217][218] The Borough of Manhattan Community College's Fiterman Hall at 30 West Broadway was condemned due to extensive damage from the attacks, and then reopened in 2012.[219]

    Other neighbouring buildings (including 90 West Street and the Verizon Building) suffered major damage but have been restored.[220] World Financial Center buildings, One Liberty Plaza, the Millenium Hilton, and 90 Church Street had moderate damage and have since been restored.[221] Communications equipment on top of the North Tower was also destroyed, with only WCBS-TV maintaining a backup transmitter on the Empire State Building, but media stations were quickly able to reroute the signals and resume their broadcasts.[213][222]

     A September 14 aerial view of the Pentagon during cleanup operations
    The PATH train system's World Trade Center station was located under the complex. As a result, the station was demolished when the towers collapsed, and the tunnels leading to Exchange Place station in Jersey City, New Jersey, were flooded with water.[223] The station was rebuilt as the $4 billion World Trade Center Transportation Hub, which reopened in March 2015.[224][225] The Cortlandt Street station on the New York City Subway's IRT Broadway–Seventh Avenue Line was also in close proximity to the World Trade Center complex, and the entire station, along with the surrounding track, was reduced to rubble.[226] The latter station was rebuilt and reopened to the public on September 8, 2018.[227] The Pentagon was extensively damaged by the impact of American Airlines Flight 77 and the ensuing fires, causing one section of the building to collapse.[228] As the aeroplane approached the Pentagon, its wings knocked down light poles and its right engine hit a power generator before crashing into the western side of the building.[229][230] The plane hit the Pentagon at the first-floor level. The front part of the fuselage disintegrated on impact, while the mid and tail sections kept moving for another fraction of a second.[231] Debris from the tail section penetrated the furthest into the building, breaking through 310 feet (94 m) of the three outermost of the building's five rings.[231][232]

    Rescue efforts
    Main article: Rescue and recovery effort after the September 11 attacks on the World Trade Center
    See also: List of emergency and first responder agencies that responded to the September 11 attacks
     Patrol Boat Hocking of the U.S. Army Corps of Engineers on its way to assist the site on September 11, 2001
    The New York City Fire Department (FDNY) deployed more than 200 units (approximately half of the department) to the World Trade Center.[233] Their efforts were supplemented by numerous off-duty firefighters and emergency medical technicians.[234][233][235] The New York City Police Department (NYPD) sent its Emergency Service Units and other police personnel and deployed its aviation unit.[236] The NYPD aviation unit assessed the situation and decided that helicopter rescues from the towers were not feasible.[237] Numerous police officers of the Port Authority Police Department (PAPD) also participated in rescue efforts.[238] Once on the scene, the FDNY, the NYPD, and the PAPD did not coordinate efforts and performed redundant searches for civilians.[234][239]

    As conditions deteriorated, the NYPD aviation unit relayed information to police commanders, who issued orders for personnel to evacuate the towers; most NYPD officers were able to safely evacuate before the buildings collapsed.[239][240] With separate command posts set up and incompatible radio communications between the agencies, warnings were not passed along to FDNY commanders.[241]

    After the first tower collapsed, FDNY commanders issued evacuation warnings. Due to technical difficulties with malfunctioning radio repeater systems, many firefighters never heard the evacuation orders. 9-1-1 dispatchers also received information from callers that was not passed along to commanders on the scene.[233]

    Reactions
    Main article: Reactions to the September 11 attacks
    See also: Timeline for September following the September 11 attacks
    The 9/11 attacks resulted in immediate responses to the event, including domestic reactions; closings and cancellations; hate crimes; Muslim-American responses to the event; international responses to the attack; and military responses to the events. Shortly after the attacks, a U.S. government fund that was created by an Act of Congress named the September 11th Victim Compensation Fund.[242][243] The purpose of the fund was to compensate the victims of the attacks and their families with the quid pro quo of their agreement not to file lawsuits against the airline corporations involved.[244] Legislation authorizes the fund to disburse a maximum of $7.375 billion, including operational and administrative costs, of U.S. government funds.[245] The fund was set to expire by 2020 but was in 2019 prolonged to allow claims to be filed until October 2090.[246][247]

    Immediate response
    Further information: U.S. military response during the September 11 attacks
    See also: Communication during the September 11 attacks
     President George W. Bush is briefed in Sarasota, Florida, where he learned of the attacks unfolding while visiting Emma E. Booker Elementary School.
     Eight hours after the attacks, U.S. Secretary of Defense Donald Rumsfeld declares "The Pentagon is functioning"
    At 8:32 a.m., FAA officials were notified Flight 11 had been hijacked and they, in turn, notified the North American Aerospace Defense Command (NORAD). NORAD scrambled two F-15s from Otis Air National Guard Base in Massachusetts and they were airborne by 8:53 a.m. Because of slow and confused communication from FAA officials, NORAD had nine minutes' notice, and no notice about any of the other flights before they crashed.

    After both of the Twin Towers had already been hit, more fighters were scrambled from Langley Air Force Base in Virginia at 9:30 a.m.[248] At 10:20 a.m., Vice President Dick Cheney issued orders to shoot down any commercial aircraft that could be positively identified as being hijacked. These instructions were not relayed in time for the fighters to take action.[248][249][250] Some fighters took to the air without live ammunition, knowing that to prevent the hijackers from striking their intended targets, the pilots might have to intercept and crash their fighters into the hijacked planes, possibly ejecting at the last moment.[251]

    For the first time in U.S. history, the emergency preparedness plan called Security Control of Air Traffic and Air Navigation Aids (SCATANA) was invoked,[252] thus stranding tens of thousands of passengers across the world.[253] Ben Sliney, in his first day as the National Operations Manager of the FAA,[254] ordered that American airspace would be closed to all international flights, causing about 500 flights to be turned back or redirected to other countries. Canada received 226 of the diverted flights and launched Operation Yellow Ribbon to deal with the large numbers of grounded planes and stranded passengers.[255]

    The 9/11 attacks had immediate effects on the American people.[256] Police and rescue workers from around the country took a leave of absence from their jobs and travelled to New York City to help recover bodies from the twisted remnants of the Twin Towers.[257] Blood donations across the U.S. surged in the weeks after 9/11.[258][259]

    The deaths of adults in the attacks resulted in over 3,000 children losing a parent.[260] Subsequent studies documented children's reactions to these actual losses and feared losses of life, the protective environment in the attacks' aftermath, and the effects on surviving caregivers.[261][262][263]

    Domestic reactions
    Further information: U.S. government response to the September 11 attacks
     
    President Bush addressing the nation from the White House at 8:30 PM ET
     
    Bush speaking to rescue workers at Ground Zero on September 14
     
    Duration: 34 minutes and 18 seconds.34:18
    During a speech to a joint session of Congress, President George W. Bush pledges "to defend freedom against terrorism". September 20, 2001 (audio only).
    Following the attacks, President George W. Bush's approval rating increased to 90%.[264] On September 20, 2001, he addressed the nation and a joint session of Congress regarding the events of September 11 and the subsequent nine days of rescue and recovery efforts, and described his intended response to the attacks. New York City mayor Rudy Giuliani's highly visible role resulted in praise in New York and nationally.[265]

    Many relief funds were immediately set up to assist the attacks' victims, with the task of providing financial assistance to the survivors of the attacks and the victims' families. By the deadline for victims' compensation on September 11, 2003, 2,833 applications had been received from the families of those who were killed.[266]

    Contingency plans for the continuity of government and the evacuation of leaders were implemented soon after the attacks.[253] Congress was not told that the United States had been under a continuity of government status until February 2002.[267]

    In the largest restructuring of the U.S. government in contemporary history, the United States enacted the Homeland Security Act of 2002, creating the U.S. Department of Homeland Security. Congress also passed the USA PATRIOT Act, saying it would help detect and prosecute terrorism and other crimes.[268] Civil liberties groups have criticized the PATRIOT Act, saying it allows law enforcement to invade citizens' privacy and that it eliminates judicial oversight of law enforcement and domestic intelligence.[269][270][271]

    To effectively combat future acts of terrorism, the National Security Agency (NSA) was given broad powers. NSA commenced warrantless surveillance of telecommunications, which was sometimes criticized as permitting the agency "to eavesdrop on telephone and e-mail communications between the United States and people overseas without a warrant".[272] In response to requests by various intelligence agencies, the United States Foreign Intelligence Surveillance Court permitted an expansion of powers by the U.S. government in seeking, obtaining, and sharing information on U.S. citizens as well as non-U.S. people from around the world.[273]

    Hate crimes
    See also: Islamophobic incidents and Persecution of Muslims
    Six days after the attacks, President Bush made a public appearance at Washington, D.C.'s largest Islamic Center and acknowledged the "incredibly valuable contribution" that millions of American Muslims made to their country and called for them "to be treated with respect".[274] Numerous incidents of harassment and hate crimes against Muslims and South Asians were reported in the days following the attacks.[275][276][277]

    Sikhs were also subject to targeting due to the use of turbans in the Sikh faith, which are stereotypically associated with Muslims. There were reports of attacks on mosques and other religious buildings (including the firebombing of a Hindu temple), and assaults on individuals, including one murder: Balbir Singh Sodhi, a Sikh mistaken for a Muslim, who was fatally shot on September 15, 2001, in Mesa, Arizona.[277] Two dozen members of Osama bin Laden's family were urgently evacuated out of the country on a private charter plane under FBI supervision three days after the attacks.[278]

    According to an academic study, people perceived to be Middle Eastern were as likely to be victims of hate crimes as followers of Islam during this time. The study also found a similar increase in hate crimes against people who may have been perceived as Muslims, Arabs, and others thought to be of Middle Eastern origin.[279] A report by the South Asian American advocacy group known as South Asian Americans Leading Together documented media coverage of 645 bias incidents against Americans of South Asian or Middle Eastern descent between September 11 and 17, 2001. Various crimes such as vandalism, arson, assault, shootings, harassment, and threats in numerous places were documented.[280][281] Women wearing hijab were also targeted.[282]

    Discrimination and racial profiling
    Further information: Detentions following the September 11 attacks, Islamophobia in the United States, and Flying while Muslim
    See also: Airport racial profiling in the United States
    A poll of Arab-Americans, conducted in May 2002, found that 20% had personally experienced discrimination since September 11. A July 2002 poll of Muslim Americans found that 48% believed their lives had changed for the worse since September 11, and 57% had experienced an act of bias or discrimination.[282]

    Following the September 11 attacks, many Pakistani Americans identified themselves as Indians to avoid potential discrimination and obtain jobs (Pakistan was created as a result of the partition of India in 1947).[283]

    By May 2002, there were 488 complaints of employment discrimination reported to the U.S. Equal Employment Opportunity Commission (EEOC). 301 of those were complaints from people fired from their jobs. Similarly, by June 2002, the U.S. Department of Transportation (DOT) had investigated 111 September 11th-related complaints from airline passengers purporting that their religious or ethnic appearance caused them to be singled out at security screenings. DOT investigated an additional 31 complaints from people who alleged they were completely blocked from boarding aeroplanes on the same grounds.[282]

    Muslim American response
    See also: Muslim attitudes towards terrorism and Peace in Islamic philosophy
    Muslim organizations in the United States were swift to condemn the attacks and called "upon Muslim Americans to come forward with their skills and resources to help alleviate the sufferings of the affected people and their families".[284] These organizations included the Islamic Society of North America, American Muslim Alliance, American Muslim Council, Council on American-Islamic Relations, Islamic Circle of North America, and the Shari'a Scholars Association of North America. Along with monetary donations, many Islamic organizations launched blood drives and provided medical assistance, food, and shelter for victims.[285][286][287]

    Interfaith efforts
    Curiosity about Islam increased after the attacks. As a result, many mosques and Islamic centres began holding open houses and participating in outreach efforts to educate non-Muslims about the faith. In the first 10 years after the attacks, interfaith community service increased from 8 to 20 percent and the percentage of U.S. congregations involved in interfaith worship doubled from 7 to 14 percent.[288]

    International reactions
     President of Russia Vladimir Putin (right) with his wife (center) at a commemoration service in New York City on November 16
    The attacks were denounced by mass media and governments worldwide. Across the globe, nations offered pro-American support and solidarity.[289] Leaders in most Middle Eastern countries, as well as Libya and Afghanistan, condemned the attacks. Iraq was a notable exception, with an immediate official statement that "the American cowboys are reaping the fruit of their crimes against humanity".[290] The government of Saudi Arabia officially condemned the attacks, but privately many Saudis favored bin Laden's cause.[291][292]

    Although Palestinian Authority (PA) president Yasser Arafat also condemned the attacks, there were reports of celebrations of disputed size in the West Bank, Gaza Strip, and East Jerusalem.[293][294] Palestinian leaders discredited news broadcasters that justified the attacks or showed celebrations,[295] and the Authority claimed such celebrations do not represent the Palestinians' sentiment, adding that it would not allow "a few kids" to "smear the real face of the Palestinians".[296][297] Footage by CNN[vague] and other news outlets were suggested by a report originating at a Brazilian university to be from 1991; this was later proven to be a false accusation, resulting in a statement being issued by CNN.[298][299] As in the United States, the aftermath of the attacks saw tensions increase in other countries between Muslims and non-Muslims.[300]

    United Nations Security Council Resolution 1368 condemned the attacks and expressed readiness to take all necessary steps to respond and combat all forms of terrorism in accordance with their Charter.[301] Numerous countries introduced anti-terrorism legislation and froze bank accounts they suspected of Al-Qaeda ties.[302][303] Law enforcement and intelligence agencies in a number of countries arrested alleged terrorists.[304][305]

    British Prime Minister Tony Blair said Britain stood "shoulder to shoulder" with the United States.[306] A few days later, Blair flew to Washington, D.C., to affirm British solidarity with the United States. In a speech to Congress nine days after the attacks, which Blair attended as a guest, President Bush declared "America has no truer friend than Great Britain".[307] Subsequently, Prime Minister Blair embarked on two months of diplomacy to rally international support for military action; he held 54 meetings with world leaders and travelled more than 40,000 miles (60,000 km).[308]

    The U.S. set up the Guantanamo Bay detention camp to hold inmates they defined as "illegal enemy combatants". The legitimacy of these detentions has been questioned by the European Union and human rights organizations.[309][310][311]

    On September 25, 2001, Iran's fifth president, Mohammad Khatami, meeting British Foreign Secretary Jack Straw, said: "Iran fully understands the feelings of the Americans about the terrorist attacks in New York and Washington on September 11". He said although the American administrations had been at best indifferent about terrorist operations in Iran (since 1979), the Iranians felt differently and had expressed their sympathetic feelings with bereaved Americans in the tragic incidents in the two cities. He also stated that "Nations should not be punished in place of terrorists".[312]

    According to Radio Farda's website, when the news of the attacks was released, some Iranian citizens gathered in front of the Embassy of Switzerland in Tehran, which serves as the protecting power of the United States in Iran (U.S. interests-protecting office in Iran), to express their sympathy, and some of them lit candles as a symbol of mourning. This piece of news on Radio Farda's website also states that in 2011, on the anniversary of the attacks, the United States Department of State published a post on its blog, in which the Department thanked the Iranian people for their sympathy and stated that it would never forget Iranian people's kindness on those harsh days.[313] After the attacks, both the President[314][315] and the Supreme Leader of Iran, condemned the attacks. The BBC and Time magazine published reports on holding candlelit vigils for the victims of Iranian citizens on their websites.[316][317] According to Politico Magazine, following the attacks, Ali Khamenei, the Supreme Leader of Iran, "suspended the usual 'Death to America' chants at Friday prayers" temporarily.[318]

    In September 2001, shortly after the attacks, some fans of AEK Athens burned an Israeli flag and unsuccessfully tried to burn an American flag. Though the American flag did not catch fire, the fans booed during a moment of silence for victims of the attacks.[319]

    Military operations
    Further information: War on terror and US invasion of Afghanistan
    Events leading up
    to the Iraq War
     
    14 July Revolution 1958
    Iraqi–Kurdish conflict 1961–1991
    17 July Revolution 1968
    Iranian Revolution 1978–1979
    Ba'ath Party Purge 1979
    Iran–Iraq War 1980–1988
    Iraqgate 1982–c.1990
    Iraqi invasion of Kuwait 1990
    Gulf War 1990–1991
    Sanctions against Iraq 1990–2003
    Iraqi uprisings 1991
    Iraqi no-fly zones conflict 1991–2003
    Iraq disarmament crisis 1991–2003
    Arms-to-Iraq affair 1992–1996
    September 11 attacks 2001
    U.S. anthrax attacks 2001
    U.S. invasion of Afghanistan 2001
    Alleged Prague connection 2001
    Iraq Resolution 2002
    Wood Green ricin plot 2003
    Colin Powell's UN presentation 2003
    v
    t
    e
    At 2:40 p.m. on September 11, Secretary of Defense Donald Rumsfeld was issuing rapid orders to his aides to look for evidence of Iraqi involvement. According to notes taken by senior policy official Stephen Cambone, Rumsfeld asked for, "Best info fast. Judge whether they are good enough to hit S.H. [Saddam Hussein] at the same time. Not only UBL" [Osama bin Laden].[320] Cambone's notes quoted Rumsfeld as saying, "Need to move swiftly – Near term target needs – go massive – sweep it all up. Things related and not".[321][322]

    In a meeting at Camp David on September 15 the Bush administration rejected the idea of attacking Iraq in response to the September 11 attacks.[323] Nonetheless, they later invaded the country with allies, citing "Saddam Hussein's support for terrorism".[324] At the time, as many as seven in ten Americans believed the Iraqi president played a role in the 9/11 attacks.[325] Three years later, Bush conceded that he had not.[326]

    The NATO council declared that the terrorist attacks on the United States were an attack on all NATO nations that satisfied Article 5 of the NATO charter. This marked the first invocation of Article 5, which had been written during the Cold War with an attack by the Soviet Union in mind.[327] Australian Prime Minister John Howard, who was in Washington, D.C., during the attacks, invoked Article IV of the ANZUS treaty.[328] The Bush administration announced a war on terror, with the stated goals of bringing bin Laden and Al-Qaeda to justice and preventing the emergence of other terrorist networks.[329] These goals would be accomplished by imposing economic and military sanctions against states harbouring terrorists, and increasing global surveillance and intelligence sharing.[330]

    On September 14, 2001, the U.S. Congress passed the Authorization for the use of Military Force Against Terrorists, which grants the President the authority to use all "necessary and appropriate force" against those whom he determined "planned, authorized, committed or aided" the September 11 attacks or who harboured said persons or groups. It is still in effect to this day.[331]

    On October 7, 2001, the War in Afghanistan began when U.S. and British forces initiated aerial bombing campaigns targeting Taliban and Al-Qaeda camps, then later invaded Afghanistan with ground troops of the Special Forces.[citation needed] This eventually led to the overthrow of the Taliban's rule of Afghanistan with the Fall of Kandahar on December 7, 2001, by U.S.-led coalition forces.[332]

    Al-Qaeda leader Osama bin Laden, who went into hiding in the White Mountains, was targeted by U.S. coalition forces in the Battle of Tora Bora,[333] but he escaped across the Pakistani border and would remain out of sight for almost ten years.[333] In an interview with Tayseer Allouni on 21 October 2001, Bin Laden stated:

    "The events proved the extent of terrorism that America exercises in the world. Bush stated that the world has to be divided in two: Bush and his supporters, and any country that doesn't get into the global crusade is with the terrorists. What terrorism is clearer than this? Many governments were forced to support this "new terrorism.".. America wouldn't live in security until we live it truly in Palestine. This showed the reality of America, which puts Israel's interest above its own people's interest. America won't get out of this crisis until it gets out of the Arabian Peninsula, and until it stops its support of Israel.[334]
    The Philippines and Indonesia, among other nations with their internal conflicts with Islamic terrorism, also increased their military readiness.[335][336] The military forces of the United States of America and the Islamic Republic of Iran cooperated to overthrow the Taliban regime, which had had conflicts with the government of Iran.[318][337][338][339]Iran's Quds Force helped U.S. forces and Afghan rebels in the 2001 uprising in Herat.[340][341][342]

    Aftermath
    Main article: Aftermath of the September 11 attacks
    See also: Post-9/11
    Health issues
    Main article: Health effects arising from the September 11 attacks
     Survivors covered in dust after the collapse of the World Trade towers; a photograph of another dust-covered victim Marcy Borders (1973–2015) subsequently gained much attention[343][344]
    Hundreds of thousands of tons of toxic debris containing more than 2,500 contaminants and known carcinogens were spread across Lower Manhattan when the Twin Towers' collapsed.[345][346] Exposure to the toxins in the debris is alleged to have contributed to fatal or debilitating illnesses among people who were at Ground Zero.[347][348] The Bush administration ordered the Environmental Protection Agency (EPA) to issue reassuring statements regarding air quality in the aftermath of the attacks, citing national security, but the EPA did not determine that air quality had returned to pre-September 11 levels until June 2002.[349]

    Health effects extended to residents, students, and office workers of Lower Manhattan and nearby Chinatown.[350] Several deaths have been linked to the toxic dust, and victims' names were included in the World Trade Center memorial.[351] Approximately 18,000 people have been estimated to have developed illnesses as a result of the toxic dust.[352] There is also scientific speculation that exposure to various toxic products in the air may have negative effects on fetal development.[citation needed] A study of rescue workers released in April 2010 found that all those studied had impaired lung functions and that 30%–40% were reporting little or no improvement in persistent symptoms that started within the first year of the attack.[353]

    Years after the attacks, legal disputes over the costs of illnesses related to the attacks were still in the court system. On October 17, 2006, a federal judge rejected New York City's refusal to pay for health costs for rescue workers, allowing for the possibility of numerous suits against the city.[354] Government officials have been faulted for urging the public to return to lower Manhattan in the weeks shortly after the attacks. Christine Todd Whitman, administrator of the EPA in the attacks' aftermath, was heavily criticized by a U.S. District Judge for incorrectly saying that the area was environmentally safe.[355] Mayor Giuliani was criticized for urging financial industry personnel to return quickly to the greater Wall Street area.[356]

    On December 22, 2010, the United States Congress passed the James L. Zadroga 9/11 Health and Compensation Act, which President Barack Obama signed into law on January 2, 2011. It allocated $4.2 billion to create the World Trade Center Health Program, which provides testing and treatment for people suffering from long-term health problems related to the 9/11 attacks.[357][358] The WTC Health Program replaced preexisting 9/11-related health programs such as the Medical Monitoring and Treatment Program and the WTC Environmental Health Center program.[358]

    In 2020, the NYPD confirmed that 247 NYPD police officers had died due to 9/11-related illnesses. In September 2022, the FDNY confirmed that the total number of firefighters who died due to 9/11-related illnesses was 299. Both agencies believe that the death toll will rise dramatically in the coming years. The Port Authority of New York and New Jersey Police Department (PAPD), the law enforcement agency with jurisdiction over the World Trade Center due to the Port Authority of New York and New Jersey owning the site confirmed that four of its police officers have died of 9/11-related illnesses. The chief of the PAPD at the time, Joseph Morris, made sure that industrial-grade respirators were provided to all PAPD police officers within 48 hours and decided that the same 30 to 40 police officers would be stationed at the World Trade Center pile, drastically lowering the number of total PAPD personnel who would be exposed to the air. The FDNY and NYPD had rotated hundreds, if not thousands, of different personnel from all over New York City to the pile, which exposed many of them to dust that would give them cancer or other diseases years or decades later. Also, they were not given adequate respirators and breathing equipment that could have prevented future diseases.[359][360][361][362]

    Economic
    Main article: Economic effects of the September 11 attacks
     U.S. deficit and debt increases in the seven years following the attacks from 2001 to 2008
    The attacks had a significant economic impact on the United States and world markets.[363][364] The stock exchanges did not open on September 11 and remained closed until September 17. Reopening, the Dow Jones Industrial Average (DJIA) fell 684 points, or 7.1%, to 8921, a record-setting one-day point decline.[365] By the end of the week, the DJIA had fallen 1,369.7 points (14.3%), at the time its largest one-week point drop in history. In 2001 dollars, U.S. stocks lost $1.4 trillion in valuation for the week.[366]

    In New York City, about 430,000 job months and $2.8 billion in wages were lost in the first three months after the attacks. The economic effects were mainly on the economy's export sectors.[367][368][369] The city's GDP was estimated to have declined by $27.3 billion for the last three months of 2001 and all of 2002. The U.S. government provided $11.2 billion in immediate assistance to the Government of New York City in September 2001, and $10.5 billion in early 2002 for economic development and infrastructure needs.[370]

    Also hurt were small businesses in Lower Manhattan near the World Trade Center (18,000 of which were destroyed or displaced), resulting in lost jobs and wages. Assistance was provided by Small Business Administration loans; federal government Community Development Block Grants; and Economic Injury Disaster Loans.[370] Some 31,900,000 square feet (2,960,000 m2) of Lower Manhattan office space was damaged or destroyed.[371] Many wondered whether these jobs would return, and if the damaged tax base would recover.[372] Studies of 9/11's economic effects show the Manhattan office real-estate market and office employment were less affected than first feared, because of the financial services industry's need for face-to-face interaction.[373][374]

    North American air space was closed for several days after the attacks and air travel decreased upon its reopening, leading to a nearly 20% cutback in air travel capacity, and exacerbating financial problems in the struggling U.S. airline industry.[375]

    The September 11 attacks also led to the U.S. wars in Afghanistan and Iraq,[376] as well as additional homeland security spending, totaling at least $5 trillion.[377]

    Effects in Afghanistan
    Further information: War in Afghanistan (2001–2021), Aftermath of the War in Afghanistan (2001–2021), and Killing of Ayman al-Zawahiri
    If Americans are clamouring to bomb Afghanistan back to the Stone Age, they ought to know that this nation does not have so far to go. This is a post-apocalyptic place of felled cities, parched land and downtrodden people.
    — Barry Bearak, The New York Times, September 13, 2001[378]
    Most of the Afghan population was already going hungry at the time of the September 11 attacks.[379] In the aftermath of the attacks, tens of thousands of people attempted to flee Afghanistan due to the possibility of military retaliation by the United States. Pakistan, already home to many Afghan refugees from previous conflicts, closed its border with Afghanistan on September 17, 2001.[380] Thousands of Afghans also fled to the frontier with Tajikistan, although were denied entry.[381] The Taliban leaders in Afghanistan themselves pleaded against military action, saying "We appeal to the United States not to put Afghanistan into more misery because our people have suffered so much", referring to two decades of conflict and the humanitarian crisis attached to it.[378]

    All United Nations expatriates had left Afghanistan after the attacks and no national or international aid workers were at their post. Workers were instead preparing in bordering countries like Pakistan, China and Uzbekistan to prevent a potential "humanitarian catastrophe", amid a critically low food stock for the Afghan population.[382] The World Food Programme stopped importing wheat to Afghanistan on September 12 due to security risks.[383] The Wall Street Journal suggested the creation of a buffer zone in an inevitable war, similarly as in the Bosnian War.[384]

     
     
    From left to right: U.S. soldiers engaged in the War on Terror in Afghanistan in May 2006 • Army Major General Chris Donahue left Afghanistan as the final American soldier on August 30, 2021
    Approximately one month after the attacks, the United States led a broad coalition of international forces to overthrow the Taliban regime from Afghanistan for their harboring of Al-Qaeda.[380] Though Pakistani authorities were initially reluctant to align themselves with the United States against the Taliban, they permitted the coalition access to their military bases, and arrested and handed over to the U.S. over 600 suspected Al-Qaeda members.[385][386]

    In a speech by the Nizari Ismaili Imam at the Nobel Institute in 2005, Aga Khan IV stated that the "9/11 attack on the United States was a direct consequence of the international community ignoring the human tragedy that was Afghanistan at that time".[387]

    In 2011, the U.S. and NATO under President Obama initiated a drawdown of troops in Afghanistan finalized in 2016. During the presidencies of Donald Trump and Joe Biden in 2020 and 2021, the United States alongside its NATO allies withdrew all troops from Afghanistan completing the withdrawal of all regular U.S. troops on August 30, 2021, 12 days before the 20th anniversary of the September 11 attacks,[150][388][389] The withdrawal marked the end of the 2001–2021 War in Afghanistan. Biden said that after nearly 20 years of war, it was clear that the U.S. military could not transform Afghanistan into a modern democracy.[390]

    The second emir of Al-Qaeda, Ayman al-Zawahiri, a close associate of bin Laden, was killed in a U.S. drone strike at his home in Kabul, Afghanistan on July 31, 2022.[391]

    Cultural influence
    Main article: Cultural influence of the September 11 attacks
    Further information: List of cultural references to the September 11 attacks, Entertainment affected by the September 11 attacks, and Osama bin Laden in popular culture
    See also: Osama bin Laden (elephant)
    The impact of 9/11 extends beyond geopolitics and into society and culture in general. Immediate responses to 9/11 included greater focus on home life and time spent with family, higher church attendance, and increased expressions of patriotism such as the flying of American flags.[392] The radio industry responded by removing certain songs from playlists, and the attacks have subsequently been used as background, narrative, or thematic elements in film, music, literature, and humour. Already-running television shows as well as programs developed after 9/11 have reflected post-9/11 cultural concerns.[393]

    9/11 conspiracy theories have become a social phenomenon, despite a lack of support from expert scientists, engineers, and historians.[394] 9/11 has also had a major impact on the religious faith of many individuals; for some it strengthened, to find consolation to cope with the loss of loved ones and overcome their grief; others started to question their faith or lose it entirely because they could not reconcile it with their view of religion.[395][396]

    The culture of America, after the attacks, is noted for heightened security and an increased demand thereof, as well as paranoia and anxiety regarding future terrorist attacks against most of the nation. Psychologists have also confirmed that there has been an increased amount of national anxiety in commercial air travel.[397] Anti-Muslim hate crimes rose nearly ten-fold in 2001 and have subsequently remained "roughly five times higher than the pre-9/11 rate".[398]

    Government policies towards terrorism
    Further information: War on terror, Anti-terrorism legislation, Airport security repercussions due to the September 11 attacks, and Legal issues related to the September 11 attacks
    See also: Senate Intelligence Committee report on CIA torture
     Alleged "extraordinary rendition" illegal flights of the CIA, as reported by Polish newspaper Rzeczpospolita[399]
    As a result of the attacks, many governments across the world passed legislation to combat terrorism.[400] In Germany, where several of the 9/11 terrorists had resided and taken advantage of that country's liberal asylum policies, two major anti-terrorism packages were enacted. The first removed legal loopholes that permitted terrorists to live and raise money in Germany. The second addressed the effectiveness and communication of intelligence and law enforcement.[401] Canada passed the Canadian Anti-Terrorism Act, their first anti-terrorism law.[402] The United Kingdom passed the Anti-terrorism, Crime and Security Act 2001 and the Prevention of Terrorism Act 2005.[403][404] New Zealand enacted the Terrorism Suppression Act 2002.[405]

    In the United States, the Department of Homeland Security was created by the Homeland Security Act of 2002 to coordinate domestic anti-terrorism efforts. The USA Patriot Act gave the federal government greater powers, including the authority to detain foreign terror suspects for a week without charge; to monitor terror suspects' telephone communications, e-mail, and Internet use; and to prosecute suspected terrorists without time restrictions. The FAA ordered that aeroplane cockpits be reinforced to prevent terrorists from gaining control of planes and assigned sky marshals to flights.

    Further, the Aviation and Transportation Security Act made the federal government, rather than airports, responsible for airport security. The law created the Transportation Security Administration to inspect passengers and luggage, causing long delays and concern over passenger privacy.[406] After suspected abuses of the USA Patriot Act were brought to light in June 2013 with articles about the collection of American call records by the NSA and the PRISM program (see Global surveillance disclosures (2013–present)), Representative Jim Sensenbrenner,(R- Wisconsin) who introduced the Patriot Act in 2001, said that the NSA overstepped its bounds.[407][408]

    Criticism of the war on terror has focused on its morality, efficiency, and cost. According to a 2021 study conducted under the auspices of the Watson Institute for International and Public Affairs, the several post-9/11 wars participated in by the United States in its War on Terror have caused the displacement, conservatively calculated, of 38 million people in Afghanistan, Pakistan, Iraq, Libya, Syria, Yemen, Somalia, and the Philippines.[409][410][411] The study estimated these wars caused the deaths of 897,000 to 929,000 people and cost $8 trillion.[411] The U.S. Constitution and U.S. law prohibits the use of torture, yet such human rights violations occurred during the War on Terror under the euphemism "enhanced interrogation".[412][413] In 2005, The Washington Post and Human Rights Watch (HRW) published revelations concerning CIA flights and "black sites", covert prisons operated by the CIA.[414][415] The term "torture by proxy" is used by some critics to describe situations in which the CIA and other U.S. agencies have transferred suspected terrorists to countries known to employ torture.[416][417]

    Legal proceedings
    Main articles: Trials related to the September 11 attacks and United States v. Khalid Sheikh Mohammed
    As all 19 hijackers died in the attacks, they were never prosecuted. Osama bin Laden was never formally indicted but was after a 10-year manhunt killed by U.S. special forces on May 2, 2011 in his compound in Abbottabad, Pakistan.[l][418] The main trial of the attacks against Mohammed and his co-conspirators Walid bin Attash, Ramzi bin al-Shibh, Ammar al-Baluchi, and Mustafa Ahmad al Hawsawi remains unresolved. Khalid Sheikh Mohammed was arrested on March 1, 2003, in Rawalpindi, Pakistan, by Pakistani security officials working with the CIA. He was then held at multiple CIA secret prisons and Guantanamo Bay, where he was interrogated and tortured with methods including waterboarding.[419][420] In 2003, Mustafa al-Hawsawi and Abd al-Aziz Ali were arrested and transferred to US custody. Both would later be accused of providing money and travel assistance to the hijackers.[421] During U.S. hearings at Guantanamo Bay in March 2007, Mohammed again confessed his responsibility for the attacks, stating he "was responsible for the 9/11 operation from A to Z" and that his statement was not made under duress.[42][422] In January 2023, the US government opened up about a potential plea deal,[423] with Biden giving up on the effort in September that year.[424]

    To date, only peripheral persons have thus been convicted for charges in connection with the attacks. These include:

    Zacarias Moussaoui who was indicted in December 2001 and sentenced to life in prison without the possibility of parole in May 2006 by a U.S. federal jury
    Mounir El Motassadeq who was first convicted in February 2003 by a Federal Court of Justice in Germany and was deported to Morocco in October 2018 after serving his sentence[425]
    Abu Dahdah who was arrested in November 2001, sentenced by a Spanish High Court and released from prison in May 2013.[426]
    Investigations
    FBI
    Further information: Hijackers in the September 11 attacks
    Immediately after the attacks, the Federal Bureau of Investigation started PENTTBOM, the largest criminal inquiry in United States history. At its height, more than half of the FBI's agents worked on the investigation and followed a half-million leads.[427] The FBI concluded that there was "clear and irrefutable" evidence linking Al-Qaeda and bin Laden to the attacks.[428]

     Mohamed Atta was one of the main planners of the attacks and the operational leader, responsible for crashing Flight 11 into the North Tower
    The FBI quickly identified the hijackers, including leader Mohamed Atta, when his luggage was discovered at Boston's Logan Airport. Atta had been forced to check two of his three bags due to space limitations on the 19-seat commuter flight he took to Boston. Due to a new policy instituted to prevent flight delays, the luggage failed to make it aboard American Airlines Flight 11 as planned. The luggage contained the hijackers' names, assignments, and Al-Qaeda connections. "It had all these Arab-language [sic] papers that amounted to the Rosetta stone of the investigation", said one FBI agent.[429] Within hours of the attacks, the FBI released the names and in many cases the personal details of the suspected pilots and hijackers.[430][431] Abu Jandal, who served as bin Laden's chief bodyguard for years, confirmed the identity of seven hijackers as Al-Qaeda members during interrogations with the FBI on September 17. He had been jailed in a Yemeni prison since 2000.[432][433] On September 27, 2001, photos of all 19 hijackers were released, along with information about possible nationalities and aliases.[434] Fifteen of the men were from Saudi Arabia, two were from the United Arab Emirates, one was from Egypt, and one was from Lebanon.[435]

    By midday, the U.S. National Security Agency and German intelligence agencies had intercepted communications pointing to Osama bin Laden.[436] Two of the hijackers were known to have traveled with a bin Laden associate to Malaysia in 2000[437] and hijacker Mohamed Atta had previously gone to Afghanistan.[438] He and others were part of a terrorist cell in Hamburg.[439] One of the members of the Hamburg cell in Germany was discovered to have been in communication with Khalid Sheikh Mohammed who was identified as a member of Al-Qaeda.[440]

    Authorities in the United States and the United Kingdom also obtained electronic intercepts, including telephone conversations and electronic bank transfers, which indicated that Mohammed Atef, a bin Laden deputy, was a key figure in the planning of the 9/11 attacks. Intercepts were also obtained that revealed conversations that took place days before September 11 between bin Laden and an associate in Pakistan. In those conversations, the two referred to "an incident that would take place in America on, or around, September 11" and they discussed potential repercussions. In another conversation with an associate in Afghanistan, bin Laden discussed the "scale and effects of a forthcoming operation". These conversations did not specifically mention the World Trade Center, the Pentagon, or other specifics.[441]



    Origins of the 19 hijackers
    Nationality
    Number
    Saudi Arabia
     
    15
    United Arab Emirates
     
    2
    Egypt
     
    1
    Lebanon
     
    1
    In their annual violent crime index for the year 2001, the FBI recorded the deaths from the attacks as murder, in separate tables so as not to mix them with other reported crimes for that year.[442] In a disclaimer, the FBI stated that "the number of deaths is so great that combining it with the traditional crime statistics will have an outlier effect that falsely skews all types of measurements in the program's analyses".[443] New York City also did not include the deaths in their annual crime statistics for 2001.[444]

    CIA
    Further information: September 11 intelligence before the attacks
    In 2004, John L. Helgerson, the Inspector General of the Central Intelligence Agency (CIA), conducted an internal review of the agency's pre-9/11 performance and was harshly critical of senior CIA officials for not doing everything possible to confront terrorism.[445] According to Philip Giraldi in The American Conservative, Helgerson criticized their failure to stop two of the 9/11 hijackers, Nawaf al-Hazmi and Khalid al-Mihdhar, as they entered the United States and their failure to share information on the two men with the FBI.[446]

    In May 2007, senators from both major U.S. political parties (the Republican and Democratic party) drafted legislation to make the review public. One of the backers, Senator Ron Wyden said, "The American people have a right to know what the Central Intelligence Agency was doing in those critical months before 9/11".[447] The report was released in 2009 by President Barack Obama.[445]

    Congressional inquiry
    Main article: Joint Inquiry into Intelligence Community Activities before and after the Terrorist Attacks of September 11, 2001
    In February 2002, the Senate Select Committee on Intelligence and the House Permanent Select Committee on Intelligence formed a joint inquiry into the performance of the U.S. Intelligence Community.[448] Their 832-page report released in December 2002[449] detailed failings of the FBI and CIA to use available information, including about terrorists the CIA knew were in the United States, to disrupt the plots.[450] The joint inquiry developed its information about possible involvement of Saudi Arabian government officials from non-classified sources.[451] Nevertheless, the Bush administration demanded 28 related pages remain classified.[450] In December 2002, the inquiry's chair Bob Graham (D-FL) revealed in an interview that there was "evidence that there were foreign governments involved in facilitating the activities of at least some of the terrorists in the United States".[452] September 11 victim families were frustrated by the unanswered questions and redacted material from the congressional inquiry and demanded an independent commission.[450] September 11 victim families,[453] members of Congress[454] and the Saudi Arabian government are still seeking the release of the documents.[455][456] In June 2016, CIA chief John Brennan said that he believes 28 redacted pages of a congressional inquiry into 9/11 will soon be made public, and that they will prove that the government of Saudi Arabia had no involvement in the September 11 attacks.[457]

    In September 2016, Congress passed the Justice Against Sponsors of Terrorism Act that would allow relatives of victims of the September 11 attacks to sue Saudi Arabia for its government's alleged role in the attacks.[458][459][460]

    9/11 Commission
    Main articles: 9/11 Commission and 9/11 Commission Report
    See also: Criticism of the 9/11 Commission
     The cover of the 9/11 Commission Report, a 585-page report released in 2004, on events leading up to the September 11 attacks and steps recommended to avoid a future terrorist attack
    The National Commission on Terrorist Attacks Upon the United States, popularly known as the 9/11 Commission, chaired by Thomas Kean, governor of New Jersey from 1982 to 1990,[m] was formed in late 2002 to prepare a thorough account of the circumstances surrounding the attacks, including preparedness for and the immediate response to the attacks.[465] On July 22, 2004, the commission issued the 9/11 Commission Report, a 585-page report based on its investigations and interviews. The report detailed the events leading up to the September 11 attacks, concluding that they were carried out by Al-Qaeda. The commission also examined how security and intelligence agencies were inadequately coordinated to prevent the attacks.

    According to the report, "We believe the 9/11 attacks revealed four kinds of failures: in imagination, policy, capabilities, and management".[466] The commission made numerous recommendations on how to prevent future attacks, and in 2011 was dismayed that several of its recommendations had yet to be implemented.[467]

    National Institute of Standards and Technology
    Main article: NIST World Trade Center Disaster Investigation
    See also: 7 World Trade Center § 9/11 and collapse
     The exterior support columns from the lower level of the South Tower remained standing after the building collapsed
    The U.S. National Institute of Standards and Technology (NIST) investigated the collapses of the Twin Towers and 7 WTC. The investigations examined why the buildings collapsed and what fire protection measures were in place, and evaluated how fire protection systems might be improved in future construction.[468] The investigation into the collapse of 1 WTC and 2 WTC was concluded in October 2005 and that of 7 WTC was completed in August 2008.[469]

    NIST found that the fireproofing on the Twin Towers' steel infrastructures was blown off by the initial impact of the planes and that had this not occurred, the towers likely would have remained standing.[470] A 2007 study of the north tower's collapse published by researchers of Purdue University determined that since the plane's impact had stripped off much of the structure's thermal insulation, the heat from a typical office fire would have softened and weakened the exposed girders and columns enough to initiate the collapse regardless of the number of columns cut or damaged by the impact.[471][472]

    The director of the original investigation stated that "the towers did amazingly well. The terrorist aircraft didn't bring the buildings down; it was the fire that followed. It was proven that you could take out two-thirds of the columns in a tower and the building would still stand".[473] The fires weakened the trusses supporting the floors, making the floors sag. The sagging floors pulled on the exterior steel columns causing the exterior columns to bow inward.

    With the damage to the core columns, the buckling exterior columns could no longer support the buildings, causing them to collapse. Additionally, the report found the towers' stairwells were not adequately reinforced to provide adequate emergency escape for people above the impact zones.[474] NIST concluded that uncontrolled fires in 7 WTC caused floor beams and girders to heat and subsequently "caused a critical support column to fail, initiating a fire-induced progressive collapse that brought the building down".[469]

    Alleged Saudi government role
    Main article: Alleged Saudi government role in the September 11 attacks
    See also: Saudi Arabia–United States relations, Saudi Arabia and state-sponsored terrorism, and The 28 pages
    In July 2016, the Obama administration released a document compiled by U.S. investigators Dana Lesemann and Michael Jacobson, known as "File 17",[475] which contains a list naming three dozen people, including the suspected Saudi intelligence officers attached to Saudi Arabia's embassy in Washington, D.C.,[476] which connects Saudi Arabia to the hijackers.[477][478]

    In September 2016, Congress passed the Justice Against Sponsors of Terrorism Act.[479][480] The practical effect of the legislation was to allow the continuation of a longstanding civil lawsuit brought by families of victims of the September 11 attacks against Saudi Arabia for its government's alleged role in the attacks.[481] In March 2018, a U.S. judge formally allowed a suit to move forward against the government of Saudi Arabia brought by 9/11 survivors and victims' families.[479]

    In 2022, the families of some 9/11 victims obtained two videos and a notepad seized from Saudi national Omar al-Bayoumi by the British courts. The first video showed him hosting a party in San Diego for Nawaf al-Hazmi and Khalid al-Mihdhar, the first two hijackers to arrive in the U.S. The other video showed al-Bayoumi greeting the cleric Anwar al-Awlaki, who was blamed for radicalizing Americans and later killed in a CIA drone strike. The notepad depicted a hand-drawn aeroplane and some mathematical equations that, according to a pilot's court statement, might have been used to calculate the rate of descent to get to a target. According to a 2017 FBI memo, from the late 1990s up until the 9/11 attack, al-Bayoumi was a paid cooptee of the Saudi General Intelligence Presidency. As of April 2022 he is believed to be living in Saudi Arabia, which has denied any involvement in 9/11.[482]

    Rebuilding and memorials
    Reconstruction
    Main articles: Rescue and recovery effort after the September 11 attacks on the World Trade Center and Construction of One World Trade Center
    Further information: World Trade Center (2001–present) and World Trade Center site
     The rebuilt World Trade Center, September 2020
    On the day of the attacks, New York City mayor Rudy Giuliani stated: "We will rebuild. We're going to come out of this stronger than before, politically stronger, economically stronger. The skyline will be made whole again".[483]

    Within hours of the attack, a substantial search and rescue operation was launched. After months of around-the-clock operations, the World Trade Center site was cleared by the end of May 2002.[484] The damaged section of the Pentagon was rebuilt and occupied within a year of the attacks.[485] The temporary World Trade Center PATH station opened in late 2003 and construction of the new 7 World Trade Center was completed in 2006. Work on rebuilding the main World Trade Center site was delayed until late 2006 when leaseholder Larry Silverstein and the Port Authority of New York and New Jersey agreed on financing.[486] The construction of One World Trade Center began on April 27, 2006, and reached its full height on May 20, 2013. The spire was installed atop the building at that date, putting One WTC's height at 1,776 feet (541 m) and thus claiming the title of the tallest building in the Western Hemisphere.[487][488] One WTC finished construction and opened on November 3, 2014.[488][489][490]

    On the World Trade Center site, three more office towers were to be built one block east of where the original towers stood.[491] 4 WTC, meanwhile, opened in November 2013, making it the second tower on the site to open behind 7 World Trade Center, as well as the first building on the Port Authority property.[492] 3 WTC opened on June 11, 2018, becoming the fourth skyscraper at the site to be completed.[493] In December 2022, the Nicholas Greek Orthodox Church fully reopened for regular services[494] followed by the opening of the Ronald O. Perelman Performing Arts Center in September 2023.[495] With construction beginning in 2008,[496] 2 World Trade Center remains as of 2023 unfinished.[497] Construction of a 5 World Trade Center is planned to begin in 2024 and be finished by 2029.[498][499]

    Christopher O. Ward, Port Authority of New York and New Jersey Executive Director from 2008 to 2011, is a survivor of the attacks and is credited with getting the construction of the 9/11 site back on track.[500]

    Memorials
    Main article: Memorials and services for the September 11 attacks
     The National September 11 Memorial and Museum in Lower Manhattan, August 2016
    In the days immediately following the attacks, many memorials and vigils were held around the world, and photographs of the dead and missing were posted around Ground Zero. A witness described being unable to "get away from faces of innocent victims who were killed. Their pictures are everywhere, on phone booths, street lights, and walls of subway stations. Everything reminded me of a huge funeral, people were quiet and sad, but also very nice. Before, New York gave me a cold feeling; now people were reaching out to help each other".[501] President Bush proclaimed Friday, September 14, 2001 as Patriot Day.[502]

     Tribute in Light, featuring two columns of light representing the Twin Towers, September 2020
    One of the first memorials was the Tribute in Light, an installation of 88 searchlights at the footprints of the World Trade Center towers.[503] In New York City, the World Trade Center Site Memorial Competition was held to design an appropriate memorial on the site.[504] The winning design, Reflecting Absence, was selected in August 2006, and consists of a pair of reflecting pools in the footprints of the towers, surrounded by a list of the victims' names in an underground memorial space.[505] The memorial was completed on September 11, 2011;[506] a museum also opened on site on May 21, 2014.[507]

    The Sphere by the German sculptor Fritz Koenig is the world's largest bronze sculpture of modern times, and stands between the Twin Towers on the Austin J. Tobin Plaza of the World Trade Center in New York City from 1971 until the terrorist attacks on September 11, 2001. The sculpture, weighing more than 20 tons, was the only remaining work of art to be recovered largely intact from the ruins of the collapsed Twin Towers after the attacks. Since then, the work of art, known in the U.S. as The Sphere, has been transformed into an important symbolic monument of 9/11 commemoration. After being dismantled and stored near a hangar at John F. Kennedy International Airport, the sculpture was the subject of the 2001 documentary The Sphere by filmmaker Percy Adlon. On August 16, 2017, the work was reinstated, installed at the Liberty Park, close to the new World Trade Center aerial and the 9/11 Memorial.[508]

     The National 9/11 Pentagon Memorial in Arlington County, Virginia, September 2008
    In Arlington County, the Pentagon Memorial was completed and opened to the public on the seventh anniversary of the attacks in 2008.[509][510] It consists of a landscaped park with 184 benches facing the Pentagon.[511] When the Pentagon was repaired in 2001–2002, a private chapel and indoor memorial were included, located at the spot where Flight 77 crashed into the building.[512]

    In Shanksville, a concrete-and-glass visitor center was opened on September 10, 2015,[513] situated on a hill overlooking the crash site and the white marble Wall of Names.[514] An observation platform at the visitor centre and the white marble wall are both aligned beneath the path of Flight 93.[514][515] A temporary memorial is located 500 yards (457 m) from the crash site.[516] New York City firefighters donated a cross made of steel from the World Trade Center and mounted on top of a platform shaped like the Pentagon.[517] It was installed outside the firehouse on August 25, 2008.[518] Many other permanent memorials are elsewhere. Scholarships and charities have been established by the victims' families and by many other organizations and private figures.[519]

    On every anniversary in New York City, the names of the victims who died there are read out against a background of sombre music. The President of the United States attends a memorial service at the Pentagon,[520] and asks Americans to observe Patriot Day with a moment of silence. Smaller services are held in Shanksville, Pennsylvania, which are usually attended by the First Lady. In September 2023, President Joe Biden did not attend services in the affected areas, instead marking the day in Anchorage, Alaska, the first US President to do so since the attacks.[521][522][523]

     
    See also
    9/11 Commission
    9/11 Commission Report
    Air France Flight 8969
    Bojinka plot
    Delta 1989 and Korean 085, two other flights that were falsely suspected of being hijacked as part of the September 11 attacks
    List of cultural references to the September 11 attacks
    Khobar Towers bombing
    List of attacks on U.S. territory
    List of aviation incidents involving terrorism
    List of deadliest terrorist attacks in the United States
    List of Islamist terrorist attacks
    List of major terrorist incidents
    List of terrorist incidents in 2001
    List of terrorist incidents in New York CityOutline of the September 11 attacks
    Timeline of al-Qaeda attacks
    Timeline of the September 11 attacks
    USS Cole bombing
    1993 World Trade Center bombing
    1998 United States embassy bombing
    2006 transatlantic aircraft plot
    2007 John F. Kennedy International Airport attack plot
    2009 Bronx terrorism plot
    2010 transatlantic aircraft bomb plot
    2023 Israel–Hamas war
    2004 Madrid train bombings
    References
    Notes
    ^ Other, secondary attack locations include the airspaces of Massachusetts, New Jersey, Ohio, Kentucky and West Virginia.
    ^ The hijackers began their first attack at around 08:13 a.m., when a group of five took control of American Airlines Flight 11, injuring two people and murdering one before forcing their way into the cockpit.
    ^ The fourth and final hijacked plane of the attacks crashed in a Pennsylvania field at 10:03 a.m., which concluded the attacks since all the attackers were now dead and all of the hijacked planes were destroyed. However, the attackers' damage continued as the North Tower kept burning for an additional 25 minutes until it ultimately collapsed by 10:28 a.m.
    ^ Sources vary regarding the number of injuries―some say 6,000[1] while others go as high as 25,000.[2]
    ^ The expression 9/11 is typically pronounced "nine eleven" in English, even including places that use the opposite numerical dating convention; the slash is not pronounced.
    ^ The exact time is disputed. The 9/11 Commission Report states that Flight 11 struck the North Tower at 08:46:40 a.m.,[3] NIST reports 08:46:30 a.m.,[4] and some other sources claim 08:46:26 a.m.[5]
    ^ Jump up to:a b c The exact time is disputed. The 9/11 Commission Report states that Flight 175 struck the South Tower at 09:03:11 a.m.,[6][7] NIST reports 09:02:59 a.m.,[8] and some other sources claim 09:03:02 a.m.[9] In any case, the 16-minute gap between each impact is rounded to 17.[10]
    ^ Jump up to:a b While NIST and the 9/11 Commission give differing accounts of the exact second of the North Tower's collapse initiation, with NIST placing it at 10:28:22 a.m.[11][12] and the commission at 10:28:25 a.m.,[13] it is generally accepted that Flight 11 did not strike the North Tower any sooner than 8:46:26 a.m.,[5] so the time it took for the North Tower to collapse was just shy of 102 minutes either way.
    ^ NIST and the 9/11 Commission both state that the collapse began at 9:58:59 a.m., which is rounded to 9:59[148]: 84 [147]: 322  for simplicity. If the commission's claim that the South Tower was struck at 9:03:11 is to be believed, then the collapse began 55 minutes and 48 seconds after the crash, not 56 minutes.
    ^ The exact time of the North Tower's collapse initiation is disputed, with NIST dubbing the moment it began to collapse as being 10:28:22 a.m.[149] and the 9/11 Commission recording the time as 10:28:25.[150]: 329 
    ^ The massacre at Camp Speicher―often described as the second deadliest act of terrorism in history after 9/11―is said to have killed between 1,095 and 1,700 people.[161] The upper estimate would tie it with the attack on the World Trade Center's North Tower, but until the true death toll of the massacre becomes known, then the hijacking and crash of Flight 11 was the deadliest act of terrorism on record.
    ^ President Barack Obama announced his death on May 1. At the time of the raid, it was early morning of May 2 in Pakistan and late afternoon of May 1 in the U.S.
    ^ Former Secretary of State Henry Kissinger was initially appointed to head the commission[461] but resigned only weeks after being appointed, to avoid conflicts of interest.[462] Former U.S. Senator George Mitchell was originally appointed as the vice chairman, but he stepped down on December 10, 2002, not wanting to sever ties to his law firm.[463] On December 15, 2002, Bush appointed former New Jersey Governor Tom Kean to head the commission.[464]
    Citations
    ^ "A Day of Remembrance". U.S. Embassy in Georgia. September 11, 2022. Archived from the original on October 24, 2023. Retrieved October 27, 2022.
    ^ Stempel, Jonathan (July 29, 2019). "Accused 9/11 mastermind open to role in victims' lawsuit if not executed". Reuters. Archived from the original on April 5, 2020. Retrieved October 27, 2022.
    ^ 9/11 Final Report of the National Commission (2004). Collapse of WTC1 (PDF). p. 24. Archived (PDF) from the original on September 12, 2017. Retrieved December 7, 2023.
    ^ National Institute of Standards and Technology (2005). "Final report on the collapse of the World Trade Center" (PDF). NIST: 69. Archived (PDF) from the original on July 7, 2021. Retrieved December 7, 2023.
    ^ Jump up to:a b "102 Minutes: Last Words at the Trade Center; Fighting to Live as the Towers Die". The New York Times. May 26, 2002. Archived from the original on September 12, 2009. Retrieved June 23, 2023.
    ^ Final Report of the 9/11 Commission on Terrorist Attacks Upon the United States (PDF) (Report). National Commission on Terrorist Attacks Upon the United States. July 22, 2004. pp. 7–8. Archived (PDF) from the original on August 16, 2021. Retrieved August 15, 2021.
    ^ Staff Report of the 9/11 Commission on Terrorist Attacks upon the United States (PDF) (Report). National Commission on Terrorist Attacks Upon the United States. September 2005 [August 26, 2004]. p. 24. Archived (PDF) from the original on July 12, 2014. Retrieved August 15, 2021.
    ^ Building and Fire Research Laboratory (September 2005). Visual Evidence, Damage Estimates, and Timeline Analysis (PDF) (Report). National Institute of Standards and Technology, United States Department of Commerce. p. 27. Archived (PDF) from the original on September 11, 2021. Retrieved August 24, 2021.
    ^ "Timeline for United Airlines Flight 175". NPR. June 17, 2004. Archived from the original on August 24, 2021. Retrieved August 24, 2021.
    ^ 9/11 Commission 2004a, p. 302.
    ^ "9/11/01 timeline: How the September 11, 2001 attacks unfolded". WPVI-TV. September 11, 2023. Archived from the original on November 5, 2023. Retrieved November 4, 2023.
    ^ National Institute of Standards and Technology (2005). "Final report on the collapse of the World Trade Center" (PDF). NIST: 229. Archived (PDF) from the original on July 7, 2021. Retrieved December 7, 2023.
    ^ 9/11 Final Report of the National Commission (2004). Collapse of WTC1 (PDF). p. 329. Archived (PDF) from the original on September 12, 2017. Retrieved December 7, 2023.
    ^ Baker, Peter; Cooper, Helene; Barnes, Julian; Schmitt, Eric (August 1, 2022). "U.S. Drone Strike Kills Ayman al-Zawahri, Top Qaeda Leader". The New York Times. Archived from the original on August 1, 2022. Retrieved August 1, 2022.
    ^ Jump up to:a b Gunaratna, Ronan (2002). Inside Al Qaeda. Berkley Books.
    ^ Formichi, Chiara (2020). Islam as Resistance. Cambridge University Press. p. 206.
    ^ Hafez, Mohammed M. (March 2008). "Jihad After Iraq: Lessons from the Arab Afghans Phenomenon". CTC Sentinel. Vol. 1, no. 4. Archived from the original (PDF) on May 8, 2011.
    ^ "Al-Qaeda's origins and links". BBC News. July 20, 2004. Archived from the original on August 2, 2019. Retrieved September 3, 2011.
    ^ Coll, Steve (2004). Ghost Wars: The Secret History of the CIA, Afghanistan, and Bin Laden, from the Soviet Invasion to September 10, 2001. Penguin Group. pp. 144–145, 238. ISBN 9781594200076.
    ^ Bergen (2006), pp. 60–61.
    ^ "Bin Laden's fatwā (1996)". PBS. Archived from the original on October 31, 2001. Retrieved May 29, 2014.
    ^ Jump up to:a b c d "Al Qaeda's Second Fatwa". PBS NewsHour. PBS. Archived from the original on November 28, 2013. Retrieved May 29, 2014.
    ^ Logevall, Fredrik (2002). Terrorism and 9/11: A Reader. New York: Houghton Mifflin Company. ISBN 0-618-25535-4.
    ^ "The Hamburg connection". BBC News. August 19, 2005. Archived from the original on May 30, 2013. Retrieved June 26, 2011.
    ^ "5 Al Qaeda Aims at the American Homeland". 9/11 Commission. Archived August 16, 2009, at the Wayback Machine.
    ^ Miller, John. ""Greetings, America. My name is Osama Bin Laden..."". Frontline. PBS. Archived from the original on November 24, 2023. Retrieved December 7, 2023.
    ^ Miller, John. ""Greetings, America. My name is Osama Bin Laden..."". PBS. Archived from the original on February 11, 2001.
    ^ Jump up to:a b "Bin Laden claims responsibility for 9/11". CBC News. October 29, 2004. Archived from the original on February 18, 2010. Retrieved September 1, 2011. Al-Qaeda leader Osama bin Laden appeared in a new message aired on an Arabic TV station Friday night, for the first time claiming direct responsibility for the 2001 attacks against the United States.
    ^ "Pakistan inquiry orders Bin Laden family to remain". BBC News. July 6, 2011. Archived from the original on November 30, 2019. Retrieved September 3, 2011.
    ^ "Full transcript of bin Laden's speech". Al Jazeera. November 2, 2004. Archived from the original on June 13, 2007. Retrieved September 3, 2011.
    ^ "Pakistan to Demand Taliban Give Up Bin Laden as Iran Seals Afghan Border". Fox News. September 16, 2001. Archived from the original on May 23, 2010. Retrieved September 3, 2011.
    ^ "Bin Laden on tape: Attacks 'benefited Islam greatly'". CNN. December 14, 2001. Archived from the original on December 27, 2007. Retrieved November 24, 2013. Reveling in the details of the fatal attacks, bin Laden brags in Arabic that he knew about them beforehand and said the destruction went beyond his hopes. He says the attacks "benefited Islam greatly".
    ^ "Transcript: Bin Laden video excerpts". BBC News. December 27, 2001. Archived from the original on July 27, 2019. Retrieved September 3, 2011.
    ^ Bin Ladin, Osama (November 1, 2004). "Full transcript of bin Ladin's speech". Al Jazeera. Archived from the original on November 1, 2020. Retrieved June 3, 2023.
    ^ "Bin Laden Dead – Where Are Other 9/11 Planners?". ABC News. May 2, 2011. Archived from the original on May 4, 2011. Retrieved February 2, 2019. While initially denying responsibility for the 9/11 attacks, Bin Laden took responsibility for them in a 2004 taped statement, saying that he had personally directed the hijackers.
    ^ "Bin Laden claims responsibility for 9/11". CBC News. October 29, 2004. Archived from the original on February 18, 2010. Retrieved February 2, 2019.
    ^ "Bin Laden 9/11 planning video aired". CBC News. September 7, 2006. Archived from the original on October 13, 2007. Retrieved September 3, 2011.
    ^ Clewley, Robin (September 27, 2001). "How Osama Cracked FBI's Top 10". Wired. Archived from the original on May 26, 2008. Retrieved May 29, 2014.
    ^ "Usama Bin Laden". Federal Bureau of Investigation. Archived from the original on October 11, 2010. Retrieved September 10, 2011.
    ^ "We left out nuclear targets, for now". The Guardian. London. March 4, 2003. Archived from the original on January 23, 2008. Retrieved September 3, 2011. Yosri Fouda of the Arabic television channel al-Jazeera is the only journalist to have interviewed Khalid Sheikh Mohammed, the al-Qaeda military commander arrested at the weekend.
    ^ Leonard, Tom; Spillius, Alex (October 10, 2008). "Alleged 9/11 mastermind wants to confess to plot". The Daily Telegraph. London. Archived from the original on January 10, 2022. Retrieved September 3, 2011.
    ^ Jump up to:a b "September 11 suspect 'confesses'". Al Jazeera. March 15, 2007. Archived from the original on September 27, 2019. Retrieved September 3, 2011.
    ^ 9/11 Commission Report (2004), p. 147.
    ^ "White House power grabs". The Washington Times. August 26, 2009. Archived from the original on December 5, 2019. Retrieved September 3, 2011.
    ^ Van Voris, Bob; Hurtado, Patricia (April 4, 2011). "Khalid Sheikh Mohammed Terror Indictment Unsealed, Dismissed". Bloomberg BusinessWeek. Archived from the original on April 17, 2011. Retrieved September 3, 2011.
    ^ Wright 2006, p. [page needed].
    ^ "Substitution for Testimony of Khalid Sheikh Mohammed" (PDF). United States District Court for the Eastern District of Virginia. 2006. p. 24. Archived from the original (PDF) on October 26, 2019. Retrieved September 3, 2011.
    ^ "[Text of] Bin Laden's [1996] Fatwa". PBS NewsHour. Archived from the original on April 19, 2014. Retrieved June 14, 2014.
    ^ Gunarathna, pp. 61–62.
    ^ Bin Laden, Osama (2005). "Declaration of Jihad". In Lawrence, Bruce (ed.). Messages to the World: The Statements of Osama bin Laden. 6 Meard Street, London W1F OEG: Verso. pp. 139, 140, 141. ISBN 1-84467-045-7. The targets of September 11 were not women and children. The main targets were the symbol of the United States: their economic and military power.
    ^ "'Muslims have the right to attack America'". The Guardian. November 10, 2001. Archived from the original on August 25, 2013.
    ^ Jump up to:a b *"Full transcript of bin Ladin's speech". Al Jazeera. Archived from the original on January 1, 2016. Retrieved April 10, 2012.bin Laden, Osama (November 24, 2002). "Full text: bin Laden's 'letter to America'". The Observer. London. Archived from the original on July 28, 2013. Retrieved September 3, 2011.
    ^ Jump up to:a bMearsheimer (2007), p. 67.
    Kushner (2003), p. 389.
    Murdico (2003), p. 64.
    Kelley (2006), p. 207.
    Ibrahim (2007), p. 276.
    Berner (2007), p. 80
    ^ "Full text: bin Laden's 'letter to America'". The Guardian. November 24, 2002. Archived from the original on October 8, 2014. Retrieved January 7, 2019. The blood pouring out of Palestine must be equally revenged. You must know that the Palestinians do not cry alone; their women are not widowed alone; their sons are not orphaned alone... American people have chosen, consented to, and affirmed their support for the Israeli oppression of the Palestinians, the occupation and usurpation of their land, and its continuous killing, torture, punishment and expulsion of the Palestinians. The American people have the ability and choice to refuse the policies of their government and even to change them if they want. (b) The American people are the ones who pay the taxes that fund the planes that bomb us in Afghanistan, the tanks that strike and destroy our homes in Palestine, the armies that occupy our lands in the Arabian Gulf, and the fleets that ensure the blockade of Iraq.
    ^ Riedel, Bruce (2008). "1: The Manhattan Raid". The Search for Al Qaeda. Massachusetts Avenue, N.W., Washington, DC, US: Brookings Institution Press. pp. 5, 6. ISBN 978-0-8157-0451-5. The Palestinian intifada, the fierce uprising in the fall of 2000 on the West Bank and Gaza, was a particularly powerful motivating event for.. bin Laden... The intifada's power over bin Laden's thinking about the 9/11 raid is underscored by his repeated attempts to push KSM to advance the timing of the crashes. In September of 2000, he urged KSM to tell Atta to attack immediately to respond to the Sharon visit to the holy sites in Jerusalem; Atta told bin Laden he was not ready yet. When bin Laden learned that Sharon, who had become Israel's prime minister in March 2001, was going to visit the White House early that summer, he again pressed Atta to attack immediately. And again Atta demurred, arguing he needed more time to get the plan and the team ready to go.
    ^ Holbrook, Donald (2014). The Al-Qaeda Doctrine. New York, NY, US: Bloomsbury. p. 145. ISBN 978-1-62356-314-1.
    ^ J. Greenberg, Karen (2005). "October 21, 2001 – Interview with Tayseer Alouni". Al Qaeda Now. New York, US: Cambridge University Press. pp. 192–206. ISBN 978-0-521-85911-0. Last year's blessed intifada helped us to push more for the Palestinian issue. This push helps the other cause. Attacking America helps the cause of Palestine and vice versa. No conflict between the two; on the contrary, one serves the other.
    ^ *Plotz, David (2001) What Does Osama Bin Laden Want? Archived November 15, 2016, at the Wayback Machine, SlateBergen (2001), p. 3
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    ^ bin Laden, Osama. "Full transcript of bin Ladin's speech". Al Jazeera. Archived from the original on January 1, 2016. Retrieved April 10, 2012. So I shall talk to you about the story behind those events and shall tell you truthfully about the moments in which the decision was taken, for you to consider
    ^ Bruce Lawrence, ed. (2005). Messages to the World: The Statements of Osama bin Laden. 6 Meard Street, London W1F OEG: Verso. p. 119. ISBN 1-84467-045-7.
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    ^ Jump up to:a b "1998 Al Qaeda fatwā". Federation of American Scientists (FAS). February 23, 1998. Archived from the original on April 21, 2010. Retrieved September 3, 2011.
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    ^ Pape, Robert A. (2005). Dying to Win: The Strategic Logic of Suicide Terrorism. New York: Random House. ISBN 978-0-8129-7338-9. Retrieved March 20, 2020.
    ^ See also the 1998 Al-Qaeda fatwā: "The ruling to kill the Americans and their allies – civilians and military – is an individual duty for every Muslim who can do it in any country in which it is possible to do it, in order to liberate the al-Aqsa Mosque and the holy mosque [Mecca] from their grip, and in order for their armies to move out of all the lands of Islam, defeated and unable to threaten any Muslim." Quoted from "Al Qaeda's Second Fatwa". PBS NewsHour. PBS. Archived from the original on November 28, 2013. Retrieved May 29, 2014.
    ^ Summers and Swan (2011), pp. 211, 506n.
    ^ Lawrence (2005), p. 239.
    ^ "Full transcript of bin Ladin's speech". Al Jazeera. November 4, 2004. Archived from the original on November 14, 2016. Retrieved August 24, 2016.
    ^ In his taped broadcast from January 2010, bin Laden said "Our attacks against you [the United States] will continue as long as U.S. support for Israel continues. ... The message sent to you with the attempt by the hero Nigerian Umar Farouk Abdulmutallab is a confirmation of our previous message conveyed by the heroes of September 11". Quoted from "Bin Laden: Attacks on U.S. to go on as long as it supports Israel" Archived December 16, 2016, at the Wayback Machine, in Haaretz.com
    ^ Bernard Lewis, 2004. In Bernard Lewis's 2004 book The Crisis of Islam: Holy War and Unholy Terror, he argues that animosity toward the West is best understood with the decline of the once powerful Ottoman empire, compounded by the import of western ideas – Arab socialism, Arab liberalism and Arab secularism
    ^ In "The spirit of terrorism", Jean Baudrillard described 9/11 as the first global event that "questions the very process of globalization". Baudrillard. "The spirit of terrorism". Archived from the original on May 28, 2010. Retrieved June 26, 2011.
    ^ In an essay entitled "Somebody Else's Civil War", Michael Scott Doran argues the attacks are best understood as part of a religious conflict within the Muslim world and that bin Laden's followers "consider themselves an island of true believers surrounded by a sea of iniquity". Hoping that U.S. retaliation would unite the faithful against the West, bin Laden sought to spark revolutions in Arab nations and elsewhere. Doran argues the Osama bin Laden videos attempt to provoke a visceral reaction in the Middle East and ensure that Muslim citizens would react as violently as possible to an increase in U.S. involvement in their region. (Doran, Michael Scott. "Somebody Else's Civil War". Foreign Affairs. No. January/February 2002. Archived from the original on April 23, 2015. Retrieved December 5, 2009. Reprinted in Hoge, James F.; Rose, Gideon (2005). Understanding the War on Terror. New York: Norton. pp. 72–75. ISBN 978-0-87609-347-4.)
    ^ In The Osama bin Laden I Know, Peter Bergen argues the attacks were part of a plan to cause the United States to increase its military and cultural presence in the Middle East, thereby forcing Muslims to confront the idea of a non-Muslim government and to eventually establish conservative Islamic governments in the region.(Bergen (2006), p. 229)
    ^ Lahoud, Nelly (2022). The Bin Laden Papers: How the Abbottabad Raid Revealed the Truth about al-Qaeda, Its Leader and His Family. New Haven (CT): Yale University Press. pp. 16–19, 307. ISBN 978-0-300-26063-2.
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    Further reading
    The 9/11 Commission Report: Final Report of the National Commission on Terrorist Attacks Upon the United States. National Commission on Terrorist Attacks. July 30, 2010. ISBN 978-1-61640-219-8.
    Atkins, Stephen E (2011). The 9/11 Encyclopedia. ABC-CLIO. ISBN 978-1-59884-921-9.
    Bolton, M. Kent (2006). U.S. National Security and Foreign Policymaking After 9/11: Present at the Re-creation. Rowman & Littlefield. ISBN 978-0-7425-5900-4.
    Caraley, Demetrios (2002). September 11, terrorist attacks, and U.S. foreign policy. Academy of Political Science. ISBN 978-1-884853-01-2.
    Chernick, Howard (2005). Resilient city: the economic impact of 9/11. Russell Sage Foundation. ISBN 978-0-87154-170-3.
    Damico, Amy M; Quay, Sara E. (2010). September 11 in Popular Culture: A Guide. Greenwood. ISBN 978-0-313-35505-9.
    Hampton, Wilborn (2003). September 11, 2001: attack on New York City. Candlewick Press. ISBN 978-0-7636-1949-7.
    Langley, Andrew (2006). September 11: Attack on America. Compass Point Books. ISBN 978-0-7565-1620-8.
    Neria, Yuval; Gross, Raz; Marshall, Randall D.; Susser, Ezra S. (2006). 9/11: mental health in the wake of terrorist attacks. Cambridge University Press. ISBN 978-0-521-83191-8.
    Ryan, Allan A. (2015). The 9/11 Terror Cases: Constitutional Challenges in the War against Al Qaeda. University Press of Kansas. ISBN 978-0-7006-2132-3.
    Strasser, Steven; Whitney, Craig R; United States. Congress. Senate. Select Committee on Intelligence, National Commission on Terrorist Attacks upon the United States (2004). The 9/11 investigations: staff reports of the 9/11 Commission: excerpts from the House-Senate joint inquiry report on 9/11: testimony from fourteen key witnesses, including Richard Clarke, George Tenet, and Condoleezza Rice. PublicAffairs. ISBN 978-1-58648-279-4.
    External links
    September 11 attacksat Wikipedia's sister projects
     Definitions from Wiktionary
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     News from Wikinews
     Quotations from Wikiquote
     Texts from Wikisource
     Data from Wikidata
    National Commission on Terrorist Attacks Upon the United States official commission website
    List of victims
    September 11, 2001, Documentary Project from the U.S. Library of Congress, Memory.loc.gov
    September 11, 2001, Web Archive from the U.S. Library of Congress, Minerva
    National Security Archive
    September 11 Digital Archive: Saving the Histories of September 11, 2001, from the Center for History and New Media and the American Social History Project/Center for Media and Learning
    DoD: Khalid Sheikh Mohammed Verbatim Transcript of Combatant Status Review Tribunal Hearing for ISN 10024, from Wikisource
    The 9/11 Legacies Project, Oriental Institute, Czech Academy of Sciences, Prague
    9/11 at 20: A Week of Reflection, Responsible Statecraft, The Quincy Institute
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