 Coordinating the missile changeover required complex planning and execution.With the restructuring of the Air Force and the disestablishment of Strategic Air Command (SAC) in the early 1990s was reassigned to Air Combat Command in 1992 and then under Air Force Space Command in 1993.In March 1995, the Base Realignment and Closure (BRAC) Commission selected the 321st Strategic Missile Wing for inactivation.