A U.S. Soldier low crawls through mud and under barbed wire in a litter obstacle course during Operation Sustainment Warrior (OSW) at Joint Base McGuire-Dix-Lakehurst, N.J., Aug. 8, 2013. OSW is a training event, hosted by the 77th Sustainment Battalion to provide participants with a realistic combat training experience. (U.S. Army photo by Staff Sgt. Terri Q. Reece/Released)