On 21 July 2008, a United States Air Force (USAF) B-52H Stratofortress operating out of Andersen Air Force Base, crashed into the Pacific Ocean during a training flight approximately 30 nautical miles (56 km) northwest of Apra Harbor, Guam. The training flight was to include participation in a local municipal celebration of Liberation Day in Hagåtña. All six crew members aboard the aircraft were killed and the aircraft was destroyed.