U.S Marines cut an opening in an obstacle made out of concertina wire during a vertical assault at Combat Town, Okinawa, Japan, Dec. 10, 2014. The Marines are assigned to Echo Company, Battalion Landing Team, 2nd Battalion, 4th Marines, 31st Marine Expeditionary Unit and are conducting training as part of the expetionary unit exercise and pre-deployment training. U.S Marines cut an opening in an obstacle made out of concertina wire during a vertical assault at Combat Town, Okinawa, Japan, Dec. 10, 2014. The Marines are assigned to Echo Company, Battalion Landing Team, 2nd Battalion, 4th Marines, 31st Marine Expeditionary Unit and are conducting training as part of the expetionary unit exercise and pre-deployment training. SHARE: Download: Full Size (1.79 MB) Tags: photo essays Credit: VIRIN: 191435-L-OFH76-426.jpg Photo Gallery