Marines hone their fast-roping skills Dec. 3 at the Camp Hansen rappel tower. The Marines gradually increased the difficulty, first rappelling without gear, then with their flak vests, and finally with their weapons. The Marines are with Company F, Battalion Landing Team 2nd Battalion, 4th Marines, 31st Marine Expeditionary Unit. (U.S. Marine Corps photo by Lance Cpl. Ryan C. Mains/Released)