Secretary of Defense Chuck Hagel, center left, stands with U.S. Air Force Gen. William M. Fraser III, 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 J. Selva to the post and presided over retirement proceedings for Fraser, who retired after 40 years of service.