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