Emergency crews work to extinguish Dale Earnhardt Jr.'s car after he crashed into a barrier during practice for the American Le Mans Series Infineon Grand Prix of Sonoma Sunday, July 18, 2004 in Sonoma, Calif. Medical officials at Infineon Raceway described the injuries as "moderate-sized burns of moderate intensity." Earnhardt was flown to the University of California-Davis Medical Center in Sacramento for precautionary reasons. (AP Photo/HO, Infineon Raceway, Richard Dole)