A Cold War nuclear bunker is buried deep inside a Colorado mountain. See inside the Cheyenne Mountain Complex.

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Kristine Villarroel for Business Insider

Nov 28 ’25

A Cold War nuclear bunker is buried deep inside a Colorado mountain. See inside the Cheyenne Mountain Complex.

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www.businessinsider.com/inside-cheyenne-mountain-complex-cold-war-nuclear-bunker

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A Cold War nuclear bunker is buried deep inside a Colorado mountain. See inside the Cheyenne Mountain Complex.

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Kristine Villarroel