Retiring Chairman of the Joint Chiefs of Staff Admiral Mike Mullen administers the Oath of Office for the new Joint Chiefs Chairman, Gen. Martin Dempsey

Retiring Chairman of the Joint Chiefs of Staff Admiral Mike Mullen, right, administers the Oath of Office for the new Joint Chiefs Chairman, Gen. Martin Dempsey, left, during a “Change of Office” Chairman of the Joint Chiefs of Staff swearing-in ceremony at Joint Base Myer-Henderson Hall in Arlington, Va., Sept. 30, 2011. Holding the bible is Gen. Dempsey's wife Deanie.