The 44th Missile Wing, however, had ably accomplished its deterrence mission. On 3 December 1991, the wing permanently pulled the first Minuteman II missile from its silo and on 6 April 1992, the first Minuteman II launch control center shut down. Inactivation of the entire missile complex ended in April 1994. In keeping with its patriotic Minuteman tradition, the 44th Missile Wing formally inactivated on 4 July 1994. Under conditions of the Strategic Arms Reduction Treaty, all of the 44th Missile Wing's Minuteman silos and launch control centers were slated for demolition with the exception of Sites Delta-01 and Delta-09. These latter two sites were turned over to the National Park Service for preservation as part of the Minuteman Missile National Historic Site.