RIO VISTA, Calif. -- Law enforcement officers from the Contra Costa County Sheriff's Department participate in a simulated report of a boat accident during a law enforcement exercise held at Brannan Island State Park, Wednesday, May 4, 2011. Nearly a 140 participants from 20 different local, state, federal and private agencies took part in the all-day exercise. U.S. Coast Guard photo by Petty Officer 3rd Class Erik Swanson.
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