ROOM CLEARING Marines participate in a room clearing demonstration as Defense Secretary Ash Carter watches during a visit on Camp Pendleton Calif., Aug. 27, 2015. DoD photo by U.S. Air Fore Master Sgt. Adrian Cadiz SHARE IMAGE: Download Image: Full Size (0.56 MB) Tags: Carter , All images, Defense Secretary , SecDef, Camp Pendleton, MARINES Photo By: DoD photo by U.S. Air Fore Master Sgt. Adrian Cadiz VIRIN: 150827-D-DT527-238.JPG Photo Gallery