King of the Bridge, US Marine Corps Photo

Cpl. Brent Pennington, combat engineer with 7th Engineer Support Battalion, 1st Marine Logistics Group, signals to a crane operator during a bridge building exercise at Marine Corps Base Camp Pendleton, Calif., Oct. 12. The hand signals allow the Marines to communicate with the crane operator to avoid accidents and injuries and to increase the speed of construction. .(U.S. Marine Corps photo by Cpl. Joshua Young)