This US Department of Energy file photo obtained 29 October 2002 shows the cloud from XX-58 IVY MIKE, an experimental thermonuclear device or H-bomb, that was fired on Elugelab Island in the Enewetak atoll 01 November1952. The Mike device used liquid deuterium as the fusion fuel and created a fireball 3 miles wide. The ‘mushroom’ cloud rose to 57,000 ft in 90 seconds, and topped out in 5 minutes at 135,000 ft – the top of the stratosphere- with a stem eight miles across. The detonation of Mike completely obliterated Elugelab, leaving an underwater crater a 6240 feet wide and 164 ft deep in the atoll where an island had once been. 01 November 2002 marks the 50th anniversary of the first detonation of the H-bomb. AFP PHOTO/DEPARTMENT OF ENERGY