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J. Robert Oppenheimer (born Julius Robert Oppenheimer; April 22, 1904-February 18, 1967) was an American theoretical physicist and director of the Manhattan Project's Los Alamos Laboratory during World War II. He is often called the "father of the atomic bomb".

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J. Robert Oppenheimer (born Julius Robert Oppenheimer; April 22, 1904-February 18, 1967) was an American theoretical physicist and director of the Manhattan Project's Los Alamos Laboratory during World War II. He is often called the "father of the atomic bomb".