Marines and sailors use ropes to pull themselves across a stream during the jungle endurance course June 20 at Camp Gonsalves, Marine Corps Base Camp Smedley D. Butler, Marine Corps Installations Pacific. As part of the course, the service members are expected to navigate their way through water obstacles and pass through tunnels while holding onto a rope, allowing them to safely and effectively complete their training. The Marines and sailors are with 1st Battalion, 8th Marine Regiment, which is currently assigned to 4th Marines, 3rd Marine Division, III Marine Expeditionary Force, under the unit deployment program. (U.S. Marine Corps photo by Lance Cpl. Diamond N. Peden/Released)