Senate Armed Services Committee Chairman Carl Levin and ranking member John Warner listen to Chief of Naval Operations, Adm. Mike Mullen’s opening remarks during his confirmation hearing for appointment to Chairman and Vice-Chairman of the Joint Chiefs of Staff at Hart Senate Office Building in Washington, D.C., July 31, 2007. DoD photo by Mass Communication Specialist 1^st Class Chad J. McNeeley, U.S. Navy. (Released)