SAN DIEGO -- Petty Officer 3rd Class Kristian Redner, a boatswain's mate at Coast Guard Station San Diego, steers a 41-foot Utility Boat while enforcing a safety zone in San Diego Bay during the America's Cup sailing races Nov. 20, 2011.
The Coast Guard enforces safety zones like this one during events to ensure the safety of the spectators and participants. U.S. Coast Guard photo by Petty Officer 2nd Class Henry G. Dunphy.
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