SAMARRA TOUR U.S. Army Maj. Gen. Robert Caslen, right, commanding general, Multinational Division North, gives U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, a tour of Patrol Base Olsen, Samarra, Iraq, Dec. 18, 2008. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 929614-U-POY71-181.jpg Photo Gallery