In the Sept. 11 attacks, 19 foreign nationals hijacked four commercial airliners and used the planes as weapons to hit the World Trade Center in New York and the Pentagon in the nation's capital.

What happened to Flight 93 that crashed in Pennsylvania on 9/11? Let us tell you the story. It was a normal sunny morning for the people of America, but a loud noise and flames disrupted them. Two ...

TMZ’s documentary “TMZ Investigates: 9/11: Plane Five,” also claims a few people in first class were acting fishy that morning. .

June 18, 2004 -- — As testimony before the 9/11 commission revealed this week, American intelligence was caught off guard as al Qaeda hijackers methodically plotted their assault on America.

Videos and documents turned over to the FBI in the weeks after 9/11 were not shared with its own field agents or top intelligence officials. That evidence is raising new questions for investigators.

Terrorists behind the 9/11 attacks used phony driver's licenses to enroll in flight classes and board the planes on Sept. 11, 2001, according to the 9/11 Commission's report.

The hijackers plowed American Airlines Flight 77 into the Pentagon on 9/11. All 64 people aboard, including five hijackers, were killed. Another 125 victims on the ground also died.