Adm. Mike Mullen addresses U.S. Marines assigned to Forward Operating Base Jackson. Chairman of the Joint Chiefs of Staff Adm. Mike Mullen addresses U.S. Marines assigned to Forward Operating Base Jackson, Afghanistan, on July 30, 2011. Mullen is on a five-day USO tour with comedian Jon Stewart, NBA legend Karl Malone and magician David Blane visiting troops in Afghanistan and Iraq. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 508229-H-NQM36-355.jpg Photo Gallery