A signal flare burns bright enough to light up the day lit shores of the Sacramento Delta during a flare training exercise held at Coast Guard Station Rio Vista, Friday, April 6, 2012. Kevin O'Leary, a columnist for the Bay & Delta Yachtsman Magazine, embedded at the station as part of a story about the safe usage of flares. U.S. Coast Guard photo by Petty Officer 2nd Class Levi Read.