DISTINGUISHED SERVICE Defense Secretary Leon E. Panetta congratulates Air Force Gen. Duncan J. McNabb after presenting him the Defense Distinguished Service Award during the U.S. Transportation Command change-of-command ceremony, where Air Force Gen. William M. Fraser III assumed leadership of the command on Scott Air Force Base, Ill., Oct. 14, 2011. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 751303-B-AYQ22-651.jpg Photo Gallery