President Barack Obama salutes Admiral Mike Mullen, Chairman of the Joint Chiefs of Staff, during the Armed Forces farewell tribute to Mullen at Joint Base Myer-Henderson Hall, in Arlington, Va., Sept. 30, 2011. Admiral Mullen’s wife, Deborah, stands at right.

President Barack Obama salutes Admiral Mike Mullen, Chairman of the Joint Chiefs of Staff, during the Armed Forces farewell tribute to Mullen at Joint Base Myer-Henderson Hall, in Arlington, Va., Sept. 30, 2011. Admiral Mullen's wife, Deborah, stands at right.