A missile combat crew (MCC), is a team of highly trained specialists, often called Missileers, manning Intermediate Range and Intercontinental ballistic missile systems (IRBMs and ICBMs, respectively). In the United States, men and women, officially coded as Nuclear and Missile Operations Officers (AFSC 13NX), of the United States Air Force, operate underground missile systems at launch control centers located throughout the country. There are also a select few missileers that have the chance to become part of a Missile Combat Crew-Airborne (MCC-A) operating the Airborne Launch Control System which provides a survivable launch capability for the Minuteman ICBM force. Crew size varied among the different missile systems, but the number was always greater than one, to abide by Strategic Air Command's Two-man rule for positive control of nuclear weapons.
First missile combat crews were composed of trained aviators (i.e. B-47, B-36), but later generations had no aviation experience and were "grown" to be missileers from the start of their careers.
From the early days of United States missile crew operations until the late 1970s, the career field was closed to female personnel. Changes were implemented to allow for full female crews on both Titan II and Minuteman/Peacekeeper crews. In 1978 the restriction of having women on crew was lifted for the Titan ICBM. Recognizing the limitations in personnel scheduling, Strategic Air Command relieved restrictions on same-sex crew pairings, into "mixed" crews on January 1, 1988.
Combat crew training consisted of three phases, Undergraduate Missile Training(UMT), Unit Qualification Training (or Unit Orientation Training), and recurring training.
UMT was performed by the 4315th Combat Crew Training Squadron/392d Training Squadron at Vandenberg AFB, California and lasted 13 weeks. UQT/UOT was held at the missile base(s) the personnel was assigned to, and conducted by local instructors, lasting three or four weeks. Recurring training happened continually on a monthly basis, and was conducted by local instructors.