OKINAWA, Japan (April 21, 2021) Hospital Corpsman 3rd Class Christian Murphy, with 3d Battalion, 4th Marines, currently attached to the 31st Marine Expeditionary Unit, provides security for a simulated casualty during the Jungle Medicine Course (JMED) at the Jungle Warfare Training Center, Camp Gonsalves, Okinawa, Japan, April 21, 2021. JMED is a 10-day medical course that trains military personnel in jungle survival skills, casualty evacuation techniques, and awareness of dangerous species in a jungle environment. (U.S. Marine Corps photo by Sgt. Josue Marquez)