Keywords: US Navy 080611-G-6464J-333 A small synthetic aperture mine (SSAM) hunter is lowered into the Portsmouth Harbor to detect fake mines during Frontier Sentinel, a multi-agency training exercise.jpg en PORTSMOUTH N H June 11 2008 A small synthetic aperture mine SSAM hunter is lowered into the Portsmouth Harbor to detect fake mines during Frontier Sentinel a multi-agency training exercise The annual maritime homeland security exercise involves the Canadian and U S Naives and the United States Coast Guard as well as numerous other federal state and local agencies in the detection assessment and response to a maritime security threat U S Coast Guard photo by Petty Officer Seth Johnson Released 2008-06-11 080611-G-6464J-333 Navy http //www navy mil/view_image asp id 60139 U S Navy photo PD-USGov-Military-Navy Images from US Navy location PORTSMOUTH N H Remote mine-hunting vehicles Frontier Sentinel 2008 |