MARINE TRAINING U.S. Marines conduct a chemical, biological, and radiological environment weapons training exercise aboard the USS Kearsarge in the Mediterranean Sea, April 1, 2011. The Marines are assigned to the 1st Battalion, 2nd Marine Regiment, 26th Marine Expeditionary Unit. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 103886-G-QFZ53-078.jpg Photo Gallery