COMMANDER NOMINATION U.S. Defense Secretary Robert M. Gates and Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, announce the nomination of U.S. Joint Forces Commander Marine Gen. James Mattis as the new commander of U.S. Central Command during a press conference at the Pentagon, July 8, 2010. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 933208-Z-YGY17-349.jpg Photo Gallery