Col. Stephen Kravitsky, 90th Missile Wing commander, F.E. Warren Air Force Base, Wyo., signs an amendment to an agreement between the base and the state Oct. 5, 2015, in the Wyoming State Museum in Cheyenne, Wyo. The amendment allows F.E. Warren to dispose of four of the five deactivated Peacekeeper Missile sites it currently maintains. (U.S. Air Force photo by Senior Airman Jason Wiese)