Tube Alloys the features, science and idea behind the American Fat Man implosion-type nuclear weapon. He broke down the development tasks required to replicate it, identifying outstanding questions that required further research on nuclear weapons. On 3 October 1952, under the code-name "Operation Hurricane", the first British nuclear device was successfully detonated in the Monte Bello Islands off the west coast of Australia. The Sputnik crisis and the development of the British hydrogen bomb led to the Atomic Energy Act being amended in 1958, and to a resumption of the nuclear Special Relationship between America and Britain under the 1958 US–UK Mutual
Agathe (atomic test) Agathe (atomic test) Agathe (aka Agate) was the name of the first French nuclear underground test. It was an atomic bomb detonated in the Hoggar mount (near In Ekker) of the then French Sahara desert on November 21, 1961, during the Algerian War (1954–62). Agathe was the first test of the jewel designation series running from 1961 until 1966. Minor and major incidents occurred during these experiments, the most important being the Beryl incident on May 1, 1962, where the nine militarymen of the "621ème Groupe d'Armes Spéciales" unit were heavily contaminated (600 mSv) as portrayed in the 2006 docudrama