Secretary Gates and Adm. Mike Mullen testify at a hearing of the Senate Armed Services Committee. Secretary of Defense Robert M. Gates and Chairman of the Joint Chiefs of Staff Adm. Mike Mullen, U.S. Navy, testify at a hearing of the Senate Armed Services Committee on the 2012 Budget Request for the DoD at Dirksen Senate Office Building in Washington, D.C., on Feb. 17, 2011. SHARE: Download: Full Size (0.04 MB) Credit: VIRIN: 565618-J-GOB75-807.jpg Photo Gallery