American Airlines Flight 77, the aircraft involved in the September 11 attacks that struck the Pentagon, took off from Washington Dulles International Airport (IAD) in Dulles, Virginia. The flight was a scheduled domestic transcontinental service bound for Los Angeles International Airport (LAX). The aircraft, a Boeing 757-223, departed at 8:20 AM with 64 people on board, including the five hijackers. Because it was a cross-country flight, the plane was loaded with approximately 11,000 gallons of jet fuel, which the hijackers intended to use as a powerful incendiary. Dulles International, located about 26 miles west of downtown Washington, D.C., remains one of the busiest airports in the United States and serves as a major international hub. The history of Flight 77 is a somber part of the airport's legacy, and there are memorials both at the Pentagon and within the region dedicated to the passengers and crew who were lost that day. Today, Dulles continues to operate as a vital gateway for the D.C. metropolitan area, with significantly enhanced security measures implemented in the decades following the 2001 tragedy.