All started with Albert Einstein writting Roosevelt about the reports of Nazis trying to purify uranium-235 which can create the atomic bomb. So the United States stepped up and started the atomic bomb or Manhattan Project. Though it was quite difficult pure uranium was rare. They was uranium-238 which was usless in making atomic bomb. To make this even more of a challenge the makeup of the 235 and 238 was nearly identical. The only way to prove which one was correct was to perform mechanical methods. Yet around of applause to massive enriched laboratory/plant in Oak Ridge. Tenessee and a special applause for Harold Urey and his collegures at Columbia University and Ernest Lawrence of the University of California, Berkeley. They all played apart in the extraction system. We must also give credit to Robert Oppenheimer chief of to help unleash the power of the atom and many other great minds that weren't named. Between 1939-1945 which is six years we managed to create our atomic bomb. We also invested over $2 billion dollars.
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