American Airlines Flight 77
Image taken from wikipedia.org
American Airlines Flight 77 was responsible for the attempted destruction of the Pentagon building in Washington D.C. The flight was scheduled to fly from Washington Dulles International Airport to Los Angeles International Airport. After a half hour into the flight, the plane was hijacked by five Al Qaeda terrorists. The hijackers forced their way into the cockpit and made the passengers go to the rear of the plane. The lead hijacker was Hani Hanjour, the most religious of all the hijackers. He flew the plane back towards Washington D.C. aiming to strike at the Pentagon.
Passengers on board the aircraft were able to call their families and notify them that the plane had been hijacked. At 9:37 in the morning, the plane slammed into the side of the Pentagon killing everyone on board. More than 100 people were killed in the building. Within minutes people started crowding the area as firefighters arrived. The building was evacuated and the damaged side was rebuilt within a year. More than a dozen people witnessed the event. Some have speculated that there was no plane, and that it was an intentional explosion. However, no evidence has come out to support this claim.