Portal:Underwater diving/Selected picture/21

Portsmouth, N.H. (June. 10, 2008) Members of the U.S. Coast Guard Maritime Safety and Security Team Boston conduct a security dive during a Frontier Sentinel exercise. an annual maritime homeland security exercise taking place in the northern Atlantic. The joint interagency exercise involves the Canadian Navy and U.S. Navy and U.S. Coast Guard, as well as numerous other federal, state, and local agencies in the detection, assessment and response to maritime security threats.