CHAIRMAN'S GREETING Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, greets U.S. Coast Guard Adm. Thad Allen on Fort Lesley J. McNair in Washington, D.C., May 25, 2010. Allen was was relieved by Coast Guard Adm. Robert J. Papp Jr., left, as the 23rd Commandant of the Coast Guard, concluding a 38-year career. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 928608-Y-UED38-474.jpg Photo Gallery