The Associated Press

One of the planes that crashed into the Trade Center was American Airlines Flight 11, hijacked after takeoff from Boston en route to Los Angeles, the airline said.

Tuesday, September 11, 2001

One of the planes that crashed into the Trade Center was American Airlines Flight 11, hijacked after takeoff from Boston en route to Los Angeles, the airline said. American Airlines issued a statement saying it had ”lost” two aircraft – Flight 11, with 92 people aboard, and Flight 77 from Washington to Los Angeles, carrying 64 people.

In Pennsylvania, United Airlines Flight 93, a Boeing 757 en route from Newark, N.J., to San Francisco, crashed about 80 miles southeast of Pittsburgh. The fate of those aboard was not immediately known and it was not clear if the crash was related to the disasters elsewhere. In a statement, the airline also said it was deeply concerned about another plane, Flight 175, a Boeing 767 bound from Boston to Los Angeles.

Authorities went on alert from coast to coast, halting all air traffic, evacuating high-profile buildings and tightening security at strategic installations. The Situation Room at the White House was in full operation.