Secretary of Defense Chuck Hagel, center left, talks with U.S. Navy Vice Adm. Andy Brown, the deputy commander of U.S. Transportation Command, upon arriving at Scott Air Force Base, Ill., May 5, 2014, to preside over a USTRANSCOM change of command ceremony. Hagel welcomed U.S. Air Force Gen. Paul J. Selva, the incoming commander of USTRANSCOM, to the post during the ceremony and presided over retirement proceedings for outgoing commander Gen. William M. Fraser III, who retired after 40 years of service.