Air Force Reserve Lt. Col. David Ferguson, 315th Aeromedical Evacuation Squadron, performs medical care to a simulated patient on a C-17 Globemaster III during an operational readiness exercise near Charleston, S.C., Nov. 17, 2018. The exercise provided the 315th Operations Group with hands-on training in a variety of airlift and aeromedical evacuation tactics during simulated combat events. (U.S. Air Force photo by Staff Sgt. Nicholas A. Priest)