Trident (UK nuclear programme) Agreement merged with the American Manhattan Project to create a combined American, British, and Canadian project. The British government expected that the United States would continue to share nuclear technology, which it regarded as a joint discovery, but the United States Atomic Energy Act of 1946 (McMahon Act) ended technical co-operation. Fearing a resurgence of United States isolationism, and Britain losing its great power status, the British government resumed its own development effort. The first British atomic bomb was tested in Operation Hurricane on 3 October 1952. The subsequent British development of the hydrogen bomb, and a fortuitous international relations
Agathe (atomic test) "Vive La Bombe!". The French Defence Minister Pierre Messmer and other officials and civilians were present in the command post and were contaminated too (around >200 mSv). The millisievert (mSv) is commonly used to measure the effective dose in diagnostic medical procedures. See radiation poisoning for a more complete analysis of effects of various dosage levels. Data provided by the French Defense Ministry on January 2007. 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