to the crew members regarding weight and runway length. On July 5, 1972, Pacific Southwest Airlines Flight 710, a Boeing 737-200, was hijacked by two Bulgarian immigrants demanding $800,000 and to be taken to the Soviet Union. After flying for an hour and landing back at SFO, the plane was stormed by four FBI agents. Both hijackers were killed along with one passenger. Two other passengers were injured. On September 13, 1972, TWA Flight 604, a Boeing 707-331C cargo plane crashed into the bay on takeoff. All three crew members survived. On October 8, 1984, a Clay Lacy Aviation Learjet 24 crashed shortly after takeoff after descending in a steep left-wing low-nose attitude after entering a broken cloud at 600 feet. All three occupants (two crew, and one occupant) were killed. On February 19, 1985, China Airlines Flight 006 made an emergency landing at the airport after a fatigued crew mishandled a single engine flameout, eventually leading to a stall and catastrophic dive that nearly led the Boeing 747SP to hit the ocean. On , United Airlines Flight 863 was forced to shut down an engine just after takeoff, and then nearly collided with San Bruno Mountain due to improper flight procedure. The aircraft returned safely to the airport. In response, United instituted new training procedures for its flight crews. On September 11, 2001, United Airlines Flight 93 was destined for San Francisco. It was hijacked by four al-Qaeda terrorists and diverted towards Washington, D.C., with the intent of crashing the plane into either The Capitol or the White House. After learning of the previous attacks on the World Trade Center and The Pentagon, the passengers attempted to regain control of the plane. The hijackers subsequently crashed the plane into a field in Somerset County, Pennsylvania, killing everyone on board. On , an arriving SkyWest Airlines Embraer EMB 120 nearly collided with a Republic Airline Embraer 170 Regional Jet at the junction of Runways 01L and 28R. After the SkyWest EMB 120 passed the Runway 28R threshold, the Republic E-170 was cleared for takeoff on 01L, in contradiction to local and FAA orders requiring the arriving aircraft to pass the intersection before clearing departing aircraft on the intersecting runway. On June 28, 2008, an ABX Air Boeing 767 preparing to depart with cargo caught fire and was seriously damaged. The pilots escaped uninjured. Although the airline had received a threat