Sailors with 2nd Medical Battalion, 2nd Marine Logistics Group, practice securing a litter for medical evacuations on a HH-46E Sea Knight aircraft, June 23, 2015, aboard Camp Lejeune, N.C., as part of a medical field exercise. The medical exercise is being conducted in order to familiarize the medical personnel with their capabilities and equipment in an austere environment). The HH-46E is with Marine Transport Squadron 1, Marine Corps Air Station Cherry Point. (U.S. Marine Corps photo by Cpl. Elizabeth Case/Released) - Sailors with 2nd Medical Battalion, 2nd Marine Logistics Group, practice securing a litter for medical evacuations on a HH-46E Sea Knight aircraft, June 23, 2015, aboard Camp Lejeune, N.C., as part of a medical field exercise. The medical exercise is being conducted in order to familiarize the medical personnel with their capabilities and equipment in an austere environment). The HH-46E is with Marine Transport Squadron 1, Marine Corps Air Station Cherry Point. (U.S. Marine Corps photo by Cpl. Elizabeth Case/Released)