SAN FRANCISCO - The Coast Guard Cutter Hawksbill enforces a security zone on San Francisco Bay for Fleet Week 2010 festivities, Saturday, Oct. 9, 2010, while an Air Force MH-60G Pave Hawk helicopter performs a demonstration. 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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