Secretary of Defense Chuck Hagel, left, and U.S. Army Gen. Martin E. Dempsey, the chairman of the Joint Chiefs of Staff, attend a U.S. Strategic Command change of command ceremony at Offutt Air Force Base, Neb., Nov. 15, 2013. Air Force Gen. C. Robert Kehler relinquished command to Navy Adm. Cecil D. Haney during the ceremony.