DISTINGUISHED SERVICE Defense Secretary Robert M. Gates congratulates Navy Vice Adm. Joseph D. Kernan, his senior military assistant, after presenting him the Defense Distinguished Service Medal during farewell ceremonies at the Pentagon, April 5, 2011. Kernan soon will take over as deputy commander for U.S. Southern Command. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 769185-Y-PKB74-928.jpg Photo Gallery