American Airlines Flight 77 was the third plane to take off. It was a Boeing 757-200. It left Washington, D.C. at 8:20 a.m. going to Los Angeles. It was two-thirds empty, with 58 passengers in its 176 seats. It was carrying 4,000 gallons of fuel, less than the 11,500 gallons it could carry. It crashed into the Pentagon at 9:37 a.m., ­flying at .