Firefighters from the 23rd Civil Engineer Squadron and flight doctors from the 23d Aerospace Medical Squadron walk onto the scene 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 Erick Requadt)