Secretary Gates and Adm. Mike Mullen address the media during a press briefing. Secretary of Defense Robert M. Gates and Chairman of the Joint Chiefs of Staff Adm. Mike Mullen, U.S. Navy, address the media during a press briefing in the Pentagon on Sept. 23, 2010. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 183840-P-DVS94-508.jpg Photo Gallery