ENSENADA, MEXICO — Associated Press - Eric Lamb was doing safety patrol on a 124-mile yacht race when he spotted a boat that appeared too close to Mexico's Coronado Islands. He never got there. As his twin-engine boat neared the uninhabited islands just south of San Diego, he stumbled on sailboat shards that were mostly no more than six inches long strewn over about two square miles. He saw a sma…