MULLEN GREETING U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, left, speaks with the Mexican Secretary of National Defense Gen. Guillermo Galvan, right, through an interpreter, center, before the start of the U.S.-Mexico High Level Consultative Group meeting hosted by U.S. Secretary of State Hillary Clinton at the State Department in Washington, D.C., April 29, 2011. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 889902-F-PJX36-394.jpg Photo Gallery