America's Military Underground

Don explores top-secret military and government tunnels and looks into classified technology that could be used to build entire cities right under our feet. He tours a Titan II missile site near Green Valley, Arizona; roams outside Area 51 and Nellis Air Force Base, Nevada; explores a tunnel boring machine (TBM) at the Three Rivers Tunnel Project near Fort Wayne, Indiana; examines the potential for nuclear-powered tunnel boring; tours the former emergency relocation bunker for the United States Congress under West Virginia's Greenbrier Resort; and investigates U.S. Army underground urban warfare training in Indiana.
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