Adm. Mike Mullen addresses guests at the 2009 USO Gala. Chairman of the Joint Chiefs of Staff Adm. Mike Mullen, U.S. Navy, addresses guests at the 2009 USO Gala at the Marriott Wardman Park in Washington, D.C., on Oct. 7, 2009. SHARE IMAGE: Download Image: Full Size (0.02 MB) Photo By: VIRIN: 883036-P-FEV49-401.jpg Photo Gallery