U.S. Air Force Tech. Sgt. Bert Leuschen, 23rd Security Forces Squadron flight sergeant, responds to a simulated active shooter situation during an emergency response exercise, Aug. 22, 2017, at Moody Air Force Base, Ga. The purpose of this active-shooter exercise was to inspect the recovery phase of an emergency situation while maintaining realism as members still responded as normal. (U.S. Air Force photo by Airman 1st Class Daniel Snider)