DEFENSE LEADERS Defense Secretary Leon E. Panetta and Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, prepare to testify on the Defense Department's budget proposal before the House Armed Service Committee in Washington, D.C., Feb. 15, 2012. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 847771-L-RRR39-373.jpg Photo Gallery