A U.S. Marine advances through a muddy obstacle course covered with concertina wire at the Jungle Warfare Training Center on Camp Gonsalves, Okinawa, Japan, Aug. 21, 2009. The Marines are assigned to Marine Wing Support Squadron 172, 7th Communication Battalion, III Marine Expeditionary Force Combat Camera.
U.S. Marine Corps photo by Sgt. Leon M. Branchaud
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