September 11 Attacks | History, Summary, Location ... - Britannica

September 11 attacks1 of 3
September 11 attacksA collection of significant facts about the September 11 attacks.(more)
September 11 attacks: Pentagon2 of 3
September 11 attacks: PentagonFire and smoke billowing from the Pentagon after hijackers crashed American Airlines flight 77 into the building during the September 11, 2001, terrorist attacks, Arlington, Virginia.(more)
September 11 attacks: United Airlines flight 933 of 3
September 11 attacks: United Airlines flight 93Part of the wreckage of United Airlines flight 93. The airplane was crashed into a field near Shanksville, Pennsylvania, during the September 11, 2001, terrorist attacks.(more)

September 11 attacks, series of airline hijackings and suicide attacks committed in 2001 by 19 militants associated with the Islamic extremist group al-Qaeda against targets in the United States, the deadliest terrorist attacks on American soil in U.S. history. The attacks against New York City and Washington, D.C., caused extensive death and destruction and triggered an enormous U.S. effort to combat terrorism. Some 2,750 people were killed in New York, 184 at the Pentagon, and 40 in Pennsylvania (where one of the hijacked planes crashed into the ground after the passengers attempted to retake the plane); all 19 terrorists died (see Researcher’s Note: September 11 attacks). Police and fire departments in New York were especially hard-hit: hundreds rushed to the scene of the attacks, and more than 400 police officers and firefighters were killed.

(Read Britannica’s interview with Jimmy Carter on 9/11 and world affairs.)

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