HILL TESTIMONY U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, testifies before the U.S. House Armed Service Committee, Washington, D.C., April 15, 2008. Defense Secretary Robert M. Gates and Secretary of State Condoleezza Rice also testified. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 422395-R-DUQ93-008.jpg Photo Gallery