World War II: The Manhattan Project

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Manhattan Project was a major military engineering development and manufactured the atomic bomb during the World War II from the United States. In the same time, the America gave the support to the United Kingdom and Canada, the project was started from 1942 till 1946, which was directly under commanded by General Groves, who is the leader of the Army Engineering Corps. The project formerly known as "Alternative Materials Development Projects" (development of substitute materials), later renamed as "Manhattan Project". In December 2, 1942, under the guidance of Enrico Fermi, the world's first experimental nuclear reactor was built in Chicago, after the successful implementation of the controlled chain reaction. The spring of 1943, Oppenheimer