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Events on Monday 31 May 1943 1
1943 – 1945Consultant to the US NavyExplosives research, at a fee of twenty-five dollars a dayBarred from the Manhattan Project as a security risk, Einstein worked part-time for the Bureau of Ordnance on the theory of underwater explosions. He learned about Hiroshima from the radio like everyone else. He later said that had he known the German bomb would fail, he would never have signed the letter.