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