When audiences watch ‘Oppenheimer’, they glimpse only the surface of the Manhattan Project’s immense undertaking. Beneath the film’s gripping drama lies a web of secret research sites and sprawling operations, stretching far beyond Los Alamos. The project employed over 130,000 people across clandestine locations in Oak Ridge, Hanford, and Chicago—many unaware of the mission’s true purpose. These hidden layers reveal a world where secrecy and scale went hand in hand, setting the stage for ethical dilemmas and innovations that shaped history.
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