Defense Secretary Robert Gates, Chairman of the Joint Chiefs of Staff Gen Peter Pace and Army Chief of Staff Gen. George Casey talk while waiting for President George W. Bush at the Pentagon, May 10, 2007. Defense Secretary Robert Gates, Chairman of the Joint Chiefs of Staff Gen Peter Pace and Army Chief of Staff Gen. George Casey talk while waiting for President George W. Bush at the Pentagon, May 10, 2007. SHARE: Download: Full Size (1.02 MB) Tags: Photo Essays Credit: VIRIN: 725947-Z-KXI29-777.jpg Photo Gallery