While Flight 93's passengers organized their revolt, a breakdown was unfolding inside the White House and the military.

On 9/11, the passengers of United Airlines Flight 93 stormed the cockpit, forcing the hijacked jet to crash in Shanksville, Pennsylvania. But before the world knew of their…

United Airlines Flight 93 ultimately crashed at 10:03 a.m. on Sept. 11, 2001, in a rural field near Shanksville, Pennsylvania.