credit. In 1955 the two new elements were named in honor of Albert Einstein and Enrico Fermi. Related tests 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 canceled when the Bravo device was tested successfully, making the cryogenic designs obsolete. See also History of nuclear weapons Operation Castle References Further reading External links – formerly classified. Sonicbomb.com: "Ivy Mike test" video Technical Photography on Operation Ivy by EG&G – Explosions in 1952 Enewetak Atoll nuclear explosive tests 1952 in military history 1952 in the environment 1950s in the Marshall Islands 1952 in the Trust Territory of the Pacific Islands Articles containing video clips November 1952 events in Oceania