American Airlines Flight 77 was American Airlines' transcontinental flight from Washington Dulles International Airport, in Dulles, Virginia to Los Angeles International Airport in Los Angeles, California. The flight flew every day in the morning on this route. On September 11, 2001, the aircraft flying this route—a Boeing 757-223—was hijacked by five al-Qaeda terrorists. The hijackers crashed the plane into the Pentagon on purpose. The crash was part of the September 11 attacks.