The attack killed 184 people at the Pentagon on 9/11. This number includes 59 passengers aboard American Airlines Flight 77 and 125 workers and civilians inside the Pentagon.

Lesson plan has students document the national response to the terrorist attacks on the United States on September 11, 2001, using polls, comment cards from teenagers, and their own recollections.

On Sept. 11, 2001, Al Qaeda terrorists crashed American Airlines flight 77 -- which had departed Dulles International Airport for Los Angeles -- into the Pentagon at 9:37 a.m.

More than two dozen photos of the Pentagon taken after a plane crashed into it on Sept. 11, 2001, have reappeared in recent days on the FBI's website six years after they were first made public.

New images from the 9/11 terrorist attacks were released by the Pentagon on March, 23, 2017.