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1st Tower Collapse
10:28 AM: The North Tower collapses. -
1st Tower
8:46 AM: A commercial jet, American Airlines flight 11, crashes into the North Tower (Tower 1) of the World Trade Center. -
2nd Tower
9:03 AM: Another jet, United Airlines flight 175, crashes into the South Tower (Tower 2) of the World Trade Center. -
Pentagon
9:37 AM: American Airlines flight 77 crashes into the Pentagon, the headquarters of the United States military, in Arlington County, Virginia. -
Shut Down
9:42 AM: United States airspace is shut down. No planes are allowed to take off and all aircraft in flight are ordered to land at the nearest airport. -
2nd Tower Collapse
9:59 AM: The South Tower begins to collapse. People from around the world watch it on TV. -
White House fail
10:03 AM: A fourth and final jet, United Airlines flight 93, crashes into a field in Shanksville, Pennsylvania. The flight was intended to hit the US Capitol building or the White House.