American Airlines Flight 77, en route to Los Angeles, departs Washington Dulles International Airport ten minutes delayed.1

Flight 77 Manifest 2
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This flight simulation is based on Flight 77's flight data recorder ("Black Box"), which recorded the aircraft's air speed, altitude, and heading data. The video captures Flight 77's take-off from Washington Dulles International Airport. The time at takeoff, 12:20, reflects GMT (Greenwich Mean Time). At the specified time, GMT was 4 hours ahead of Washington, DC, where it was 8:20am. Please note that the content of this video is serious and may be distressful for those personally impacted by September 11th.

1 Flight 77 takes off” National September 11 Memorial & Museum n.d. Web. March 16, 2011 http://timeline.national911memorial.org/#/Explore/2/Entry/536
2 “Passenger Lists” United States v. Zacarias Moussaoui, Criminal No. 01-455-A, Prosecution Trial Exhibits Web. n.d. April 27, 2011 http://www.vaed.uscourts.gov/notablecases/moussaoui/exhibits/prosecution/flights/P200054.html
Courtesy of the National 9/11 Memorial and Museum