SAN FRANCISCO, Aug. 4, 2005 – The 25-foot-long vessel bounced over the whitecaps on San Francisco Bay, propelled by 450 horsepower of thrust as it approached the majestic span that's become this city's internationally known symbol. There, below the Golden Gate Bridge, Coast Guard Petty Officer 1st Class Jason Gale and Seaman Marcel Gradvohl began inspecting the bridge's piers, abutments, fenders and pilings for signs of tampering or intrusion, and ensuring that no people or watercraft had violated the 25-yard security zone around the structures. Gale and Gradvohl, both assigned to Coast Guard Station Golden Gate, are on the front...