OPERATIONS TOUR Defense Secretary Ash Carter receives a tour of the Combat Operations Division as he visits Nellis Air Force Base, Nev., Aug. 26, 2015. DoD photo by U.S. Air Force Master Sgt. Adrian Cadiz SHARE IMAGE: Download Image: Full Size (0.93 MB) Tags: Carter , nellis afb, All images, Defense Secretary , SecDef Photo By: DoD photo by U.S. Air Force Master Sgt. Adrian Cadiz VIRIN: 150826-D-DT527-383.JPG Photo Gallery