Pan Am Flight 841 was a commercial passenger flight of a Boeing 747 from San Francisco, California to Saigon, South Vietnam which was hijacked over the South China Sea on 2 July 1972, ostensibly as an act of protest concerning United States involvement in the Vietnam War as well as the expulsion from the U.S. of the South Vietnamese hijacker, a recent graduate of a U.S. university. The hijacking ended when the captain and passengers overcame and killed the lone hijacker after the plane landed at Tan Son Nhut Airport in Saigon. Flight PA841 was a scheduled Pan Am commercial passenger flight, on a Boeing 747, which departed from San Francisco on 2 July 1972 destined for Saigon with stops at Honolulu, Guam and Manila. About 45 minutes after the plane departed Manila with 153 passengers and crew aboard for the final leg of its trip to Saigon, a 24-year-old South Vietnamese native, Nguyễn Thái Bình, passed a note to a flight attendant that stated in English, "You are going to fly me to Hanoi and this airplane will be destroyed when we get there." Bình, who claimed to be North Vietnamese, also took another flight attendant hostage. The note was conveyed to the flight's 53-year-old captain, Eugene Vaughn. Bình had graduated from the University of Washington on 10 June 1972 with a bachelor's degree in fisheries management after attending from 1968 to 1971 on a USAID scholarship. An activist opposed to U.S. involvement in the Vietnam War, Bình had been arrested for occupying the South Vietnamese consulate in New York; his visa was revoked on 7 June and he was expelled from the U.S.. Bình, who boarded the flight in Honolulu, ostensibly decided to hijack his flight home as an "act of revenge". When Vaughn refused to reroute the flight from Saigon to Hanoi, Bình wrote a second note spattered with his own blood. The second note read "This indicates how serious I am about being taken to Hanoi." Vaughn confronted Bình in the cabin and observed a foil-wrapped package that Bình said contained a bomb. Bình was also armed with a long knife. Vaughn also spoke with another passenger on the flight, W.H. Mills, whom he knew to be a retired San Francisco police officer, advising him that he might require his assistance to overcome the hijacker and returning the officer's .357 magnum handgun that had been stored