SECURITY DISCUSSIONS Defense Secretary Robert M. Gates, left, and Chairman of the Joint Chiefs of Staff Navy Adm. Michael G. Mullen, center, welcome Republic of Korea National Assemblyman Chung Mong-joon, right, to the Pentagon for a meeting to discuss bilateral security issues, Jan. 23, 2008. SHARE: Download: Full Size (0.02 MB) Credit: VIRIN: 986017-H-VKX20-551.jpg Photo Gallery