Lance Cpl. Michael Jeng sets in security while his

Lance Cpl. Michael Jeng sets in security while his fellow Marines work to reach his position in the “Pit and Pond” obstacle during the endurance course April 19 at the Jungle Warfare Training Center, Okinawa, Japan. The endurance course is the culminating event in jungle warfare training for the Marines, testing their acquired skills over roughly 5 miles of Okinawa jungle and through 30 obstacles. Teamwork is the foundation of the grueling course, with squads of 12 Marines running through it. Jeng is a Pleasanton, Calif., native and rifleman with Company L, 3rd Battalion, 3rd Marine Regiment. The Hawaii-based battalion is attached to 4th Marine Regiment, 3rd Marine Division, III Marine Expeditionary Force as part of the unit deployment program. (U.S. Marine Corps photo by Sgt. Matthew Callahan/Released)