LIBERTY MESSAGE U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, addresses troops assigned to U.S. DIvision Center during a visit to Camp Liberty, Iraq, April 22, 2011. Mullen is visiting the Central Command area of operation to support a USO tour and visit counterparts and service members in the area. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 871136-M-VCE12-768.jpg Photo Gallery