Secretary of the Air Force Michael Donley takes a breath during his farewell ceremony, June 21, 2013, at Joint Base Andrews, Md. Donley was confirmed as the 22nd secretary of the Air Force, Oct. 2, 2008. He had been serving as the acting secretary since June of that year, as well as for seven months in 1993, making him the longest-serving secretary of the Air Force in the service's history. Under Secretary of the Air Force Eric Fanning will serve as the acting secretary until the President nominates and the Senate confirms a replacement. (U.S. Air Force photo by Scott M. Ash/Released)