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NORAD headquarters at Cheyenne Mountain: they hollowed out a mountain, and installed an entire complex mounted on springs. https://en.m.wikipedia.org/wiki/Chey
by fmajid 2y ago
NORAD headquarters at Cheyenne Mountain: they hollowed out a mountain, and installed an entire complex mounted on springs.
https://en.m.wikipedia.org/wiki/Cheyenne_Mountain_Complex https://en.m.wikipedia.org/wiki/Cheyenne_Mountain_Complex