America's Book of Secrets (2012)

S3E8 Secret Underground

Title: Hidden Depths Plot: While Americans may understand what lies above, are they aware of the mysteries lurking below? This episode delves into the covert facilities hidden beneath the United States, where secrets could be so perilous that the government would go to great lengths to keep them concealed. Author Nick Redfern uncovers a secretive government stronghold designed for emergencies, sheltering top officials. Former CIA operative John Lear reveals underground rail networks linking key military sites. U.S. Attorney Laura Duffy discusses the Super Tunnel, a newly uncovered route in a sophisticated drug trafficking network spanning the U.S.-Mexico border. Author Terry Kirkpatrick explores the alarming potential of terrorists collaborating with drug cartels to exploit these tunnels for attacks on America.