U.S. Marine Corps joint terminal attack controllers, forward air controllers and radio operators with Supporting Arms Liaison Team Delta, 1st Air Naval Gunfire Liaison Company, deployed from Marine Corps Base Camp Pendleton, Calif., move across a field as they prepare to assault a simulated enemy during exercise Mountain Roundup 2013 at the Juniper Butte Range, located about 70 miles from Mountain Home Air Force Base, Idaho, Oct. 8, 2013. Mountain Roundup is a multinational exercise focusing on ground operations, close-air support, urban combat, convoy operations and air-to-air training scenarios.