GATES ARRIVAL Defense Secretary Robert M. Gates, right, walks with Army Gen. David H. Petraeus, commander, U.S. Central Command, left, and Air Force Gen. Duncan McNabb, commander U.S. Transportation Command, prior to awarding Transcom with the Joint Meritorious Unit Award during a ceremony on Scott Air Force Base, Ill., April 1, 2010. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 632456-Z-AUA67-215.jpg Photo Gallery