SECURITY CHIEFS U.S. Defense Secretary Robert M. Gates, left, and Iraqi National Security Advisor Mouwaffak al-Rubaie, center, talk with one another during Gates' unannounced visit to Iraq, Feb. 10, 2008. SHARE IMAGE: Download Image: Full Size (0.06 MB) Photo By: VIRIN: 753030-N-RPR16-580.jpg Photo Gallery