Titan II Nuclear Missile Warhead Reentry Vehicle
The Titan II Intercontinental Ballistic Missile (ICBM) was the largest silo based missile produced by the United States. These liquid fueled missiles were on around the clock operational status during the Cold War. The Titan II had an estimated firing time of less than one minute from the eight-story deep silo. The silo was protected by a 740-ton "silo closure door" that could be rolled away in less than twenty seconds. The Titan Il was in service from 1963 to 1987.