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Packed spectator stands (grand stand, grandstand) at Indianapolis Motor Speedway / driver LLOYD RUBY driving MongooseOffy Indy car 25 from pits / Indy race cars including car 3 driven by BOBBY UNSER racing time trial laps / driver ART POLLARD sitting behind wheel of Lotus Indy car 20 / packed spectator stands / Indy car 36 pulling from pits / driver GRAHAM HILL in race car; Graham Hill pulling race car from pits; Hill driving racer on track / Lloyd Ruby driving Indy 25 / Graham Hill sitting behind wheel of Lotus Indy car / judge waving checkered flag at finish line / judge waving forward driver ROGER MCCLUSKEY and EagleOffy car 8; McCluskey racing time trial / Bobby Unser talking w unidentified white man; pit crew pushing EagleOffy car 3 onto track; Unser racing time trial; Unser pulling into pits / pit crew pushing driver DAN GURNEY and EagleFord Indy car 48; CU Dan Gurney; Gurney racing time trial / driver JOE LEONARD driving Lotus Indy car 60 from pit; Joe Leonard racing time trial, then pulling into pits / driver GARY BETTENHAUSEN pulling Indy car 11 from pit / pit crew pushing JOHNNY RUTHERFORD and Indy car 18 onto track / driver BILLY VUKOVICH II pulling ShrikeOffy Indy car 98 from pits / driver MIKE MOSLEY driving Indy car 90 from pits / pit crew pushing driver MEL KENYON and Indy car 15. Indy Turbochargers on May 30, 1968 in Indianapolis, Indiana (Footage by Getty Images)