Spc. Edward Whitfield (left), a combat medic with 602nd Area Support Medical Company, attached to 189th Combat Sustainment Support Battalion, and Columbia, S.C., native, awaits instructions from Sgt. Thomas Vail, a flight medic with the United States Army Air Ambulance Detachment, 5th Aviation Battalion, Operations Group for Joint Readiness Training Center, and Eighty Four, Pa., native, on hot and cold, day and night, medical evacuation loading and unloading procedures on the UH-72 Lakota helicopter during a joint operational access exercise at JRTC on Fort Polk, La., Aug. 9. (U.S. Army photo by Sgt. Amanda Tucker, 82nd Sustainment Brigade Public Affairs/Released)