Killed: 64, including four flight attendants and two pilots and 125 in the Pentagon
The third plane, a Boeing 757, took off from from Dulles Airport, Washington, at 08:10 and was en route to Los Angeles when it was hijacked. It was seen approaching Washington from the south-west. Just a few miles outside the city it made a 270 degree turn and lined up on the Pentagon. The impact and resulting fireball caused a five-storey section of the building to collapse.

9/11 Commission: How the hijacks unfolded

Hijackers seen passing airport checks

Hijackers Suspected hijackers were named by the FBI as Khalid Al-Midhar, Majed Moqed, Nawaq Alhamzi, Salem Alhamzi and Hani Hanjour. The suspect who piloted the jet may have been Hanjour. Investigators believe the passengers were herded into the rear of the plane. The jet dropped off radar after the transponder in the cockpit was switched off. Air force jets were alerted - but they arrived after the plane had crashed.

On board: Among the passengers was TV commentator Barbara Olson, wife of US Solicitor General Theodore Olson. She called her husband twice. She said the hijackers were armed with knives and boxcutters and she asked him, "What should I tell the pilot to do?" During the second call he told her a plane had crashed into the World Trade Center.