DEFENSE LEADERS U.S. Defense Secretary Leon E. Panetta, right, holds a joint press conference with British Defense Secretary Philip Hammond at Lancaster House in London, Jan. 19, 2013. Panetta is on a six-day trip to Europe to visit with defense counterparts and troops. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 417400-J-WSR80-041.jpg Photo Gallery