California's largest wildfire of the year was started by a sailor stuck on an isolated island who fired a flare gun to attract attention. The 67-year-old was trapped on Santa Rosa Island in California's Channel Islands National Park. The wildfire burned more than a quarter of the island, threatening rare Torrey pine trees found in only two locations in the United States. According to the United States Coast Guard, the man became stranded after his sailboat struck rocks near Santa Rosa Island on Friday. He remained on the island overnight before rescue crews reached him the following morning. 'The sailor...