September 11, 2001: Additional details
On Tuesday morning, September 11, 2001, the U.S. is attacked by terrorists in New York City and Washington, and the world changes forever.
Sept. 11: Hijacked jetliners hit the World Trade Center in New York and the Pentagon outside Washington. A fourth hijacked plane crashes into a field in Pennsylvania. Trading on Wall Street is stopped. The Federal Aviation Administration halts all flight operations at the nation's airports for the first time in U.S. history. U.S. military is placed on high alert. President Bush addresses the nation and vows to "find those responsible and bring them to justice." Hundreds of New York City firemen and policemen sent to rescue WTC workers are lost when the WTC Twin Towers collapse. Reaction from international leaders is swift as world leaders react with outrage over the attacks. 
Three buildings in the World Trade Center Complex collapsed due to structural failure on the day of the attack. The south tower (2 WTC) fell at approximately 9:59 a.m., after burning for 56 minutes in a fire caused by the impact of United Airlines Flight 175 at 9:03 a.m. The north tower (1 WTC) fell at 10:28 a.m., after burning approximately 102 minutes in a fire caused by the impact of American Airlines Flight 11 at 8:46 a.m. A third building, 7 World Trade Center (7 WTC) collapsed at 5:20 p.m., after being heavily damaged by debris from the Twin Towers when they fell and subsequent fires. Numerous adjacent buildings to the complex also had substantial damage and fires and had to be demolished. The Deutsche Bank Building is the only remaining large structure that suffered damage and fires at ground zero that has yet to be fully demolished, though this is expected to be completed by mid 2007