September 11 attacks

2001 attacks in the United States

The September 11 attacks, colloquially known as 9/11, were a coordinated series of suicide attacks perpetrated by the Islamic terrorist organization al-Qaeda against the United States in 2001. A total of 19 terrorists planned and subsequently hijacked four airliners, then flew one into each of the Twin Towers at the World Trade Center in New York City. The third plane crashed into the Pentagon, the headquarters of the United States Department of Defense, in Arlington County, Virginia. The fourth plane crashed in a rural Pennsylvania field during a passenger revolt. In response to the attacks, the United States launched the global war on terror, seeking to eliminate hostile groups deemed terrorist organizations and the governments purported to support them. This foreign policy agenda was conducted over the next two decades.

Also known as...

September 11, 11 September, 11 September 2001, September 11, 2001, 11 September Attacks, September 11th Attacks, 9/11 Attacks, September 11, 2001 terrorist attacks, and terrorist attacks of September 11, 2001

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