Operation Mosaic The first British atomic bomb was tested in Operation Hurricane at the Monte Bello Islands in Western Australia on 3 October 1952. Britain thereby became the third nuclear power after the United States and the Soviet Union, but just four weeks after Operation Hurricane, the United States successfully demonstrated a hydrogen bomb. The technology mastered in Operation Hurricane was six years old, and with the hydrogen bomb in hand, the US Congress saw no benefit in renewing cooperation with the UK. All the while Britain strove for independence, at the same time it sought interdependence in the form of a
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