SecAF addresses clean energy summit
Secretary of the Air Force Michael Donley presents a keynote address on the Department of Defense's energy initiatives at the 2012 National Clean Energy Summit in Las Vegas Aug. 7, 2012. The secretary encouraged private industry and other government agencies to work together to create a more agile, lethal, adaptable and effective military force. (U.S. Air Force photo/Tech. Sgt. Shad Eidson)