SONOMA, Calif. -- Two Coast Guard MH-65 Dolphin helicopters, from Air Station San Francisco, fly over the Infineon Raceway during prerace festivities at the NASCAR Sprint Cup Series event, June 20, 2010. Several military units from the Coast Guard, U.S. Navy and U.S. Air Force participated in these festivities including flyovers, honor guard and a large flag display. U.S. Coast Guard photo by Petty Officer 3rd Class Levi Read.