Marine Cpl. Robert D. Adams struggles through a water-filled ditch on the endurance course at the Jungle Warfare Training Center at Okinawa, Japan, on Aug. 3, 2001. The week long training is capped by an endurance course designed to test the Marines' endurance and leadership skills. Adams is a heavy equipment operator with the Marine Expeditionary Unit Service Support Group-31 deployed from Camp Hansen, Okinawa, for the training.