A top secret government agency is in immediate need of an underground lair. Like, by today | CNN
The Elephant in the Tunnel: Preparing to Fight and Win Underground - Modern War Institute
Underground Tunnels of Los Angeles – Los Angeles, California - Atlas Obscura
What You Told Us About Your Hometown's Hidden Tunnels - Atlas Obscura
Underground Bases and Tunnels: What Is the Government Trying to Hide?: Dr. Richard Sauder, Ph.D.: 9780932813374: Amazon.com: Books
Underground giants: our six most impressive tunnel systems
Map Claims to Show Deep Underground Bases are Under Wyoming
Wright State Newsroom – Wright State mythbuster: the tunnel system « Wright State University
Tunnels' secrets include military uses, underground networks | KRON4
When the Pentagon Dug Secret Cold War Ice Tunnels to Hide Nukes - HISTORY
Underground Bases and Tunnels: What Is the Government Trying to Hide?: Dr. Richard Sauder, Ph.D.: 9780932813374: Amazon.com: Books
The Birth of Powered Flight and Air-to-Ground Communications > Air Force Space Command (Archived) > Article Display
Now A Museum, This USSR Submarine Base Was Built To Endure U.S. Nukes — And Retaliate : NPR
Norway Reverts to Cold War Mode as Russian Air Patrols Spike - The New York Times
Satellites found 'secret' U.S. military bases - YouTube
Scenes From Underground - The Atlantic
Helsinki's sprawling underground tunnel network offers shelter from Russia's potential threat - ABC News
5 Underground and Secret Military Bases Around the World | SOFREP
Fox News: Iran is building military tunnels in Syria-Iraq border | Iran International
The forgotten underground world of Swiss bunkers - SWI swissinfo.ch
Brenner Base breakthrough combines 24km of tunnel | Ground Engineering (GE)
What lies beneath: tunnels for trafficking, or just a subterranean service? Time to rescue these spaces from the conspiracists
Inside Yugoslavia's Secret Naval Tunnels
