Secretary of Defense Chuck Hagel, left, exchanges greetings with U.S. Air Force Gen. William M. Fraser III, center, the outgoing commander of U.S. Transportation Command, and Fraser's wife, Beverly Fraser, before the start of a USTRANSCOM change of command ceremony at Scott Air Force Base, Ill., May 5, 2014. Hagel welcomed incoming commander Gen. Paul J. Selva to the post during the ceremony and presided over retirement proceedings for Fraser, who retired after 40 years of service.