The World's Most Secure Buildings: Cheyenne Mountain Complex

Описание: Cheyenne Mountain Complex is a closed-to-the-public underground facility situated inside Cheyenne Mountain in Colorado.

The complex is located under 2,000 feet of granite and is secured against seismic activity, 30-megaton nuclear explosions, and electromagnetic pulse attacks.

But what makes it one of the world's most secure buildings? Let's find out!

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