ARCTIC EXERCISE U.S. Marines and sailors climb up the side of the USNS Arctic while conducting a simulated expanded, visit, board, search and seizure mission as part of a composite training exercise while under way in the Atlantic Ocean, Dec. 7, 2011. The troops are assigned to the 24th Marine Expeditionary Unit's Force Reconnaissance Platoon. SHARE: Download: Full Size (0.09 MB) Credit: VIRIN: 268300-D-UYJ34-710.jpg Photo Gallery