Titan 1 Intercontinental Ballistic Missile Complex 4C
The main tunnel at the decommissioned missile complex near Chico, Calif., provides access to three identical missile silos, the generator room, command center, servers and living quarters. The 851st Strategic Squadron, Beale AFB Calif., maintained this missile site and two others in the area until 1965. (U.S. Air Force photo by Senior Airman Adam Hamar)