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![September 11]()
Visible from space, a smoke plume rises from Manhattan on Sept. 11, 2001, after two planes crashed into the towers of the World Trade Center. (Photo: NASA)![September 11]()
A commercial plane flies into the World Trade Center in New York City on Sept. 11, 2001, in what would be the worst act of terrorism on U.S. soil. (Photo: AP)![September 11]()
A view of the Empire State Building and the Twin Towers burning after two planes crashed into them as part of the orchestrated terror attacks on Sept. 11, 2001. (Photo: AP)![September 11]()
Lower Manhattan after two planes hit the Twin Towers on Sept. 11, 2001 (Photo: AP)![September 11]()
Two people flee the World Trade Center site on September 11, 2001. (Photo: AP)![September 11]()
A view of the New York City skyline after the terrorist attacks on Sept. 11, 2001. (Photo: AP)![September 11]()
Smoke billows from lower Manhattan after the fall of the Twin Towers on September 11, 2001. (Photo: AP)![September 11]()
Firefighters survey the rubble of the World Trade Center in Lower Manhattan after the devastating terrorist attacks on Sept. 11, 2001. (Photo: AP)![September 11]()
Firefighters survey the rubble of the World Trade Center in New York City after two commercial airliners crashed into the Twin Towers on Sept. 11, 2001. (Photo: AP)![September 11]()
A flag is mounted at the World Trade Center site in Lower Manhattan after the terrorist attacks on Sept. 11, 2001. (Photo: AP)![September 11]()
The Pentagon in Washington, D.C., on Sept. 11, 2001, after a hijacked commercial airliner flew into it during the worst terrorist attacks on U.S. soil. (Photo: AP)![September 11]()
Sept. 11, 2009: The World Trade Center construction site, also known as Ground Zero, in New York City eight years after the tragedy. (Photo: AP)![September 11]()
Wreckage from United Flight 93, which crashed in Shanksville, Pa., killing all 44 passengers aboard. (Photo: AP)![September 11]()
Wreckage from United Flight 93, which crashed in Shanksville, Pa. after being hijacked. Authorities speculated that the plane was headed for Washington, D.C. (Photo: AP)![September 11]()
A memorial honors a victim of United Flight 93, which crashed in Shanksville, Pa. after being hijacked on September 11, 2001. (Photo: AP)![September 11]()
This flag from a Flight 93 memorial in Shanksville, Pa. reads: "Our nation will eternally honor the heroes of Flight 93." (Photo: AP)September 11
In the worst terrorist attacks on U.S. soil, 19 men hijacked four commercial jetliners on Sept. 11, 2001, flying two of them into the World Trade Center in New York City and one into the Pentagon in Washington, D.C. The fourth went down in a field in Shanksville, Pa.
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- September 11
