What if everything you know about America's surface is only half the story? Beneath our cities, mountains, and military bases lies a hidden world -- an entire network of underground bunkers, tunnels, and classified cities built to survive nuclear war, natural disaster, and maybe something far stranger.

In this Redacted Files deep dive, Clayton Morris uncovers the secret world beneath our feet -- from Cheyenne Mountain's impenetrable NORAD fortress and Raven Rock's "Underground Pentagon" to FEMA's Mount Weather and the long-rumored network of Deep Underground Military Bases (D.U.M.B.s). We'll explore declassified Cold War documents, secret continuity-of-government plans, and the unexplained tunnel systems that stretch across the country.

Are these just relics of the Cold War -- or evidence of something far bigger? What are these underground cities really for? And why has the U.S. government spent decades -- and untold billions -- digging deeper than ever before?