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They built the biggest nuclear bomb ever then cut it in half

The Soviet Union built the most powerful nuclear weapon ever created, then deliberately reduced its explosive power before testing it. This video explains why engineers feared fallout, delivery ...
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The true scale of nuclear weapons

Nuclear weapons have shaped global politics for decades, but their destructive power is almost impossible to comprehend. From the bomb that devastated Hiroshima in 1945 to the Soviet Union’s abandoned ...