TROOP TALK U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, addresses U.S. Marines on Forward Operating Base Jackson, Afghanistan, April 19, 2011. Mullen is visiting the Central Command area of operation to support a USO tour to the region and visit counterparts and service members in the area. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 214381-R-AVA19-317.jpg Photo Gallery