RADIO TRAFFIC Defense Secretary Ash Carter listens to radio traffic as rides in a Marine Corps V-22 Osprey over Camp Pendleton Calif., Aug. 27, 2015. Carter visited the base to observe a beach assault demonstration and speak with Marines. DoD photo by U.S. Air Force Master Sgt. Adrian Cadiz SHARE IMAGE: Download Image: Full Size (1.05 MB) Tags: Carter , All images, Defense Secretary , SecDef, Camp Pendleton, MARINES Photo By: DoD photo by U.S. Air Force Master Sgt. Adrian Cadiz VIRIN: 150827-D-DT527-037.JPG Photo Gallery