character: J. Robert Oppenheimer
topic: Scientific leadership during World War II
grade: 6
subject: History
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character: Enrico Fermi
topic: Contribution to the Manhattan Project
grade: 6
subject: History
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character: Leo Szilard
topic: Advocacy for atomic bomb development
grade: 6
subject: History
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character: Niels Bohr
topic: Collaboration with Oppenheimer and impact on nuclear physics
grade: 6
subject: History
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