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Driver BOBBY UNSER racing EagleOffy Indy car 3 / driver LLOYD RUBY racing Mongoose Offy Indy car 25 / ART POLLARD racing Lotus Indy car 20 / Bobby Unser racing car 3, JOE LEONARD racing Lotus Indy car 60 / driver CARL WILLIAMS pulling Indy car 84 into pits / driver GORDON JOHNCOCK pulling Indy car 4 into pits; Gordon Johncock getting out of car, tossing gloves / driver AL UNSER pulling LolaFord Indy car 24 into pits / crowd standing, watching race / Al Unser crashing into wall, front tires flying off; tire rolling along track; Al Unser waving to crowd while walking away from accident / driver JERRY GRANT pulling EagleFord Indy car 78 into pits / driver BUD TINGLESTAD pulling Indy car 10 into pits / driver DENIS HULME pulling Indy car 42 into pits / Art Pollard pulling car 20 into pits / pit crews working on Indy race cars / driver GRAHAM HILL pulling Lotus Indy car 70 into pits / pit crew member holding sign for Unser to take pit stop; Bobby Unser pulling into pits / Lloyd Ruby racing car 25 / driver RONNIE BUCKNUM racing EagleFord Indy car 45. Indy Turbochargers on May 30, 1968 in Indianapolis, Indiana (Footage by Getty Images)