Secretary of Defense Chuck Hagel, center left, presents a Defense Distinguished Service Medal to U.S. Air Force Gen. William M. Fraser III, center right, the outgoing commander of U.S. Transportation Command, during a USTRANSCOM change of command ceremony at Scott Air Force Base, Ill., May 5, 2014. Hagel welcomed incoming commander Gen. Paul Selva and presided over retirement proceedings for Fraser, who retired after 40 years of service.