SECURING A LINE U.S. Navy Petty Officer 3rd Class Samuel VanHouten, assigned to Naval Mobile Construction Battalion 1, secures a line which will be used as an anchor for lowering a litter containing a wounded survivor off the roof of a training structure in a mass casualty drill at Naval Construction Battalion Center Gulfport, Miss., Jan. 26, 2007. SHARE: Download: Full Size (0.04 MB) Credit: VIRIN: 238428-I-ATB19-026.jpg Photo Gallery