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Today in History: U.S. Executes First Nuclear Weapon Test at Trinity

7/16/2025

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Summary

Story summary

On July 16, 1945, the United States conducted the Trinity test, marking the first detonation of a nuclear weapon. This test, part of the Manhattan Project, involved an implosion-design plutonium bomb, similar to the Fat Man bomb used in Nagasaki. The test aimed to confirm the bomb's design before its deployment in World War II.

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Story summary

On July 16, 1945, the United States conducted the Trinity test, marking the first detonation of a nuclear weapon. This test, part of the Manhattan Project, involved an implosion-design plutonium bomb, similar to the Fat Man bomb used in Nagasaki. The test aimed to confirm the bomb's design before its deployment in World War II.