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0:33
YouTube
The Build Explained
Why Does The US Military Have A City Built Inside A Mountain That Has Never Switched Off?
Inside Cheyenne Mountain in Colorado sits a city that has run continuously since 1966. Miners removed six hundred and ninety three thousand tonnes of granite to create the cavern, excavating using over a million pounds of explosives. Inside, fifteen freestanding steel buildings were constructed — none of them touching the granite walls. Every ...
2.2K views
2 months ago
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