DEFENSE TESTIMONY Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, testifies as Defense Secretary Ash Carter looks on before the House Armed Services Committee in Washington, D.C., March 18, 2015. The two defense leaders focused on defense programs and combating the Islamic State of Iraq and the Levant, or ISIL. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 880125-J-SUH86-381.jpg Photo Gallery