Ivy Mike - Nuclear Test 1952 - U.S. Nukes in Poster

Nuclear detonation "Ivy Mike" Ivy Mike was the codename given to the first test of a full-scale 82-tonne thermonuclear device, in which part of the explosive yield comes from nuclear fusion. It was detonated on November 1, 1952 by the United States on the island of Elugelab in Enewetak Atoll, in the Pacific Ocean, as part of Operation Ivy. It was the first full test of the Teller-Ulam design, a staged fusion device. Due to its physical size and fusion fuel type (cryogenic liquid deuterium), the Mike device was not suitable for use as a weapon; it was intended as an extremely conservative proof of concept experiment to validate the concepts used for multi-megaton detonations. A simplified and lightened bomb version (the EC-16) was prepared, and scheduled to be tested in operation Castle Yankee, as a backup in case the non-cryogenic "Shrimp" fusion device (tested in Castle Bravo) failed to work; that test was cancelled when the Bravo device was tested successfully, making the cryogenic designs obsolete." -- Wikipedia