During the 1960s, the U.S. Air Force built 54 missile silos around the country, including 18 around Tucson, Ariz., to defend the country in case of attack. By the 1980s, these Titan Missile silos were obsolete, so President Reagan decommissioned them. The Titan Missile Museum opened on May 21, 1986, inside the former Titan II Missile Site 8 (571-7) in Sahuarita, Ariz., about 20 miles south of Tucson. The museum interprets life at the complex and the steps to fire the missile. The centerpiece of the museum is an inert Titan II intercontinental ballistic missile in the silo.