The Cost of Uranium Separation Plants

Stalin didn't start working on the bomb until Hiroshima. When he heard about what happened at Hiroshima that's when he said, because before that he didn't trust the scientists to be telling him the truth. He thought maybe the Americans were giving them disinformation and since they didn't want to have to go get shot at they were lying about it. The Germans similarly never quite put it all together. We did fortunately for us.