SAN FRANCISCO - Coast Guard 25-foot response boats enforce a security zone on the San Francisco Bay for Fleet Week 2010 festivities, Saturday, Oct. 9, 2010, while the Navy minesweeper USS Chief transits the area. Fleet Week is a celebration of the sea services where more than 500 sailors, Marines and Coast Guardsmen from visiting ships make the city a port of call. U.S. Coast Guard photo by Lt. Todd Vorenkamp.
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