In July 1950, soon after the outbreak of the Korean War, the Joint Chiefs of Staff resolved to send ten Silverplate (nuclear-capable) Boeing B-29 Superfortress bombers to Guam as a deterrent to a People's Republic of China (PRC) attack on Taiwan, (Republic of China), and for possible future use in Korea,[4] each loaded with a Mark 4 nuclear bomb without the fissile pit.
The aircraft was piloted by Captain Eugene Q. Steffes, with First Lieutenant Carter W. Johnson as his co-pilot and Technical Sergeant Donald W. Moore as his flight engineer.
Unable to accelerate, the aircraft would not be able to clear terrain ahead, so Steffes initiated a 180-degree turn to head back for an emergency landing.
The aircraft turned around but lost altitude, Steffes asked Johnson to help him with the controls, and Moore reported more trouble with number three engine.
The escape hatches there were jammed and would not open, but passengers and crew were able to exit through a hole in the nose caused by the crash, and through a window from which the commander and co-pilot removed the plexiglas.
When .50 caliber ammunition started to "cook off", Sergeant Lewis Siqueira, who was in charge of the bake shop detail, ordered his men out of the area.
Sergeant Paul P. Ramoneda started to do so, but then turned back to help men still trapped in the burning aircraft.
[8] Lieutenant Colonel Raymond E. Holsey, the highest-ranking officer on the scene, feared the 5,000 pounds (2,300 kg) of explosives in the Mark 4 would explode.
[6] Their report made four recommendations: USAF B-29 operating procedures were changed as a result of the investigation; aircraft with the same type of propellers as 44-87651 were required to be test-flown after corrective maintenance, and the number of persons permitted aboard an operational flight was reduced to 16, as it was felt that overloading and an inadequate number of safety belts in the accident aircraft contributed to the high loss of life.
A formal renaming ceremony was held on 20 April 1951, presided over by the Governor of California, Earl Warren, which was attended by Travis's family.
[13] The Mark 4 nuclear bomb contained a depleted uranium tamper as well as radioactive material inside the electronics making up the arming and firing circuits.