The Secret North Korean Airbase They Buried Inside a Mountain

In the 1970s, US intelligence satellites uncovered an impossible geographic anomaly: massive military runways disappearing directly into solid granite mountains in North Korea. This declassified analysis investigates the engineering and strategic doctrine behind these subterranean airbases. Built to protect military assets from advanced air power, these hardened bunkers are now being retrofitted to shield mobile ballistic missile fleets from conventional bunker-buster munitions and aerial strikes.