Air Force Col. Gregory Jones, commander of the 129th Rescue Wing, says farewell to Defense Secretary Ash Carter as Carter departs Moffett Field, Calif., Aug. 29, 2015, following a trip to California. U.S. Air Force photo by Master Sgt. Adrian Cadiz
Defense Secretary Ash Carter speaks with reporters after delivering remarks at the National Full Scale Aerodynamics Complex in Moffett Field, Calif., Aug. 28, 2015. U.S. Air Force photo by Master Sgt. Adrian Cadiz
Defense Secretary Ash Carter talks withEmily Chang from Bloomberg West in an interview during a visit to Moffett Field, Calif., Aug. 28, 2015. U.S. Air Force photo by Master Sgt. Adrian Cadiz
Defense Secretary Ash Carter tours LinkedIn headquarters during a visit with the company's co-founder, Reid Hoffman, in Mountain View, Calif., Aug. 28, 2015. Carter was there to discuss technologies the Department of Defense could learn from the social networking service. DoD photo by U.S. Air Force Master Sgt. Adrian Cadiz
Defense Secretary Ash Carter speaks with members of the media after delivering remarks at the National Full-Scale Aerodynamics Complex at Moffett Field, Calif., Aug. 28, 2015. DoD photo by U.S. Air Force Master Sgt. Adrian Cadiz
Defense Secretary Ash Carter shakes hands with Emily Chang from Bloomberg West after an interview during a visit to Moffett Field, Calif., Aug. 28, 2015. U.S. Air Force photo by Master Sgt. Adrian Cadiz
Defense Secretary Ash Carter shakes hands with Air Force Col. Daniel Lapostole, vice commander of the 129th Rescue Wing, as he arrives at Moffett Field, Calif., Aug. 28, 2015, to visit the Defense Innovation Unit Experimental and speak at the Manufacturing Innovation Institute event at the National Full Scale Aerodynamics Complex. U.S. Air Force photo by Master Sgt. Adrian Cadiz
Defense Secretary Ash Carter speaks with Airman assigned to Nellis Air Force Base, Nev., Aug. 26, 2015 as he visited the base to observe a Red Flag Exercise. DoD photo by U.S. Air Force Master Sgt. Adrian Cadiz
Defense Secretary Ash Carter speaks with the media during a visit Nellis Air Force Base, Nev., Aug. 26, 2015. DoD photo by U.S. Air Force Master Sgt. Adrian Cadiz
An Airman assigned to Nellis Air Force Base, Nev., asks a question as Defense Secretary Ash Carter speaks with Airman assigned to the base, Aug. 26, 2015 as he visited the base to observe a Red Flag Exercise. DoD photo by U.S. Air Force Master Sgt. Adrian Cadiz
Defense Secretary Ash Carter speaks with U.S. Air Force aircraft maintainers during a visit to Nellis Air Force Base, Nev., Aug. 26, 2015. Carter spoke with Airman and observed a Red Flag Exercise. DoD photo by U.S. Air Force Master Sgt. Adrian Cadiz
Defense Secretary Ash Carter speaks with a U.S. Air Force aircraft maintainer during a visit to Nellis Air Force Base, Nev., Aug. 26, 2015. Carter spoke with Airman and observed a Red Flag Exercise. DoD photo by U.S. Air Master Master Sgt. Adrian Cadiz
Defense Secretary Ash Carter speaks with service members while visiting Nellis Air Force Base, Nev., Aug. 26, 2015. Carter also observed part of the ongoing Red Flag training exercise during his visit. DoD photo by Air Force Master Sgt. Adrian Cadiz
Defense Secretary Ash Carter speaks with Air Force aircraft maintainers during a visit to Nellis Air Force Base, Nev., Aug. 26, 2015. DoD photo by Master Sgt. Adrian Cadiz
Defense Secretary Ash Carter, right, speaks with Maj. Gen. Jay B. Silveria, Commander, United States Air Force Warfare Center as he visits Nellis Air Force Base, Nev., Aug. 26, 2015. DoD photo by U.S. Air Force Master Sgt. Adrian Cadiz
Service members salute as Defense Secretary Ash Carter walks onto the parade field during an assumption-of-command ceremony on Scott Air Force Base, Ill., Aug. 26, 2015. Air Force Gen. Darren W. McDew assumed leadership of U.S. Transportation Command during the ceremony. DoD photo by U.S. Air Force Master Sgt. Adrian Cadiz
Defense Secretary Ash Carter and Air Force Gen. Darren W. McDew greet guests at the U.S. Transportation Command assumption-of-command ceremony on Scott Air Force Base, Ill., Aug. 26, 2015. McDew assumed leadership of the command during the ceremony. DoD photo by U.S. Air Force Master Sgt. Adrian Cadiz
Defense Secretary Ash Carter hands the U.S. Transportation Command flag to Air Force Gen. Darren W. McDew as he assumed command during a ceremony on Scott Air Force Base, Ill., Aug. 26, 2015. DoD photo by Air Force Master Sgt. Adrian Cadiz