FILE - In this May 25, 1981, file photo, Danny Ongais hits the wall in the third turn on the 64th lap of the Indianapolis 500 auto race at Indianapolis motor Speedway. High speed, risky maneuvers and a crowded field have always been a dangerous combination at the Indianapolis 500. But at a race that has too often ended in tragedy for drivers, crew members and fans, the most spectacular crashes are often the most unforgettable. (AP Photo/File)