SCHRIEVER AIR FORCE BASE, Colo. -- Department of the Air Force Police Officer Josh Miller and Staff Sgt. Jordan Rutherford, 50th Security Forces Squadron members, participate in an active-shooter exercise at Schriever Air Force, Colorado, April 14, 2021. The exercise was held at the 310th Space Wing headquarters to evaluate the response and effectiveness of the base's emergency response agencies. (U.S. Space Force photo by Dennis Rogers)