080611-N-8298P-023.JPG New Hampshire, NH (Jun. 11, 2008) -Explosive Ordnance Disposal conduct a security dive looking for anything suspicious as part of Frontier Sentinel exercise. The annual maritime homeland security exercise, Frontier Sentinel, is taking place in the northern Atlantic. The joint interagency exercise involves the Canadian and U.S. Navies and U.S. Coast Guard, as well as numerous other federal, state, and local agencies in the detection, assesment and responce to a maritime security threats. U.S. Navy photo by Mass Communication Specialist 2nd Class Christopher Perez