The Titan Missile Museum, also known as Air Force Facility Missile Site 8 or as Titan II ICBM Site 571-7, is a former ICBM (intercontinental ballistic missile) site located about south of Tucson, Arizona in the United States. It was constructed in 1963 and deactivated in 1984. It is now a museum run by the nonprofit Arizona Aerospace Foundation and includes an inert Titan II missile in the silo, as well as the original launch facilities. It was declared a National Historic Landmark in 1994. It is the only Titan II complex to survive from the late Cold War period. Underground facilities The underground facilities consist of a three-level Launch Control Center, the eight level silo containing the missile and its related equipment, and the connecting structures of cableways (access tunnels), blast locks, and the access portal and equipment elevator. The complex was built of steel reinforced concrete with walls as much as in some areas, and a number of 3-ton blast doors sealed the various areas from the surface and each other. The top level of the silo permits viewing the silo missile doors. Level 3 houses a large diesel generator. Level 7 provides access to the lowest part of the launch duct. Visitors on the "Beyond the Blast Doors" tour are allowed to stand directly underneath the missile. Level 8, at underground, houses the propellant pumps. Titan II missile The Titan II missile inside the silo has neither warhead nor fuel, allowing it to be safely displayed to visitors. In accordance with a US/USSR agreement, the silo doors are permanently blocked from opening more than half way. The dummy reentry vehicle mounted on the missile has a prominent hole cut in it to prove it is inert. All the support facilities at the site remain intact, complete with all of their original equipment. The silo became operational in 1963 and was deactivated in 1984 as part of President Reagan's policy (announced in 1981) of decommissioning the Titan II missiles as part of a weapon systems modernization program. All operational Titan II silos throughout the country were demolished, including 18 sites around McConnell AFB in Wichita, Kansas, 17 sites near Little Rock AFB, Arkansas (one additional site previously damaged beyond repair in a mishap/non-nuclear explosion) and 17 other sites by Davis-Monthan AFB and Tucson except for this one. It is now a National Historic Landmark. Yield and warhead The