Adm. Mike Mullen testifies at a hearing of the Senate Armed Services Committee. Chairman of the Joint Chiefs of Staff Adm. Mike Mullen testifies at a hearing of the Senate Armed Services Committee on operations in Libya at the Dirksen Senate Office Building in Washington, D.C., on March 31, 2011. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 077311-K-FWX57-251.jpg Photo Gallery