Underwater Detonation of a Nuclear Bomb

The Baker Test of Operation Crossroads was one of the first nuclear detonation tests that incorporated public spectators and the press. Occurring in the Pacific in Bikini Atoll, this now iconic photo captures the moment of an underwater nuclear detonation on July 25th, 1946. The purpose of this test – and the eventual follow-up tests – was to investigate the effect of a nuclear weapon on ships and armor plating. Prior to this test, the thought was that solid steel present within ships would be able to protect sailors from a possible attack via atomic or nuclear weaponry, but these experiments suggested otherwise: rendering any kind of protective measure nearly useless against such deadly weapons.