Petty Officer 3rd Class Christopher Pierce, a member of Maritime Safety and Security Team (MSST) 91109 San Diego, uses a backpack-mounted radiation detector to scan a vessel in Mission Bay, Calif., during the Domestic Nuclear Detection Office's Boat Mounted Detector Drill, Sept. 23, 2010. Federal, state and local agencies worked together during the drill to detect, locate and identify nuclear materials in Mission Bay and San Diego Bay. U.S. Coast Guard photo by Petty Officer 2nd Class Henry G. Dunphy.
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