A U.S. airman, foreground, directs airmen participating in Vigilant Ace 16 to load a simulated casualty into an HC-130 Combat King II cargo aircraft on Osan Air Base, South Korea, Nov. 5, 2015. The airman is assigned to the 18th Aeromedical Evacuation Squadron. U.S. Air Force photo by Staff Sgt. Benjamin Sutton