Sgts. Edan Valkner and Juan Martinez demonstrate a ground fighting technique. U.S. Marine Corps Sgts. Edan Valkner (left) and Juan Martinez demonstrate a ground fighting technique for Marines embarked aboard High Speed Vessel Swift (HSV 2) and members of the Jamaican Defense Force in Port Antonio, Jamaica, on May 17, 2010. The ship is deployed in support of Southern Partnership Station 2010. SHARE: Download: Full Size (0.1 MB) Credit: VIRIN: 267563-U-SJT30-405.jpg Photo Gallery