Bristol Motor Speedway - Day 1

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Marcos Ambrose, driver of the Stanley Ford, adjusts his helmet in his... NyhetsfotoBil,Bristol Motor Speedway,Förare,Hjälm,Horisontell,Huvudbonad,Marcos Ambrose,Motorsport,Nascar Sprint Cup,Rätta till,Sport,Sporthjälm,Stock Car Racing,Tennessee,Träna,USAPhotographer Collection: Getty Images Sport 2013 Getty ImagesBRISTOL, TN - AUGUST 23: Marcos Ambrose, driver of the #9 Stanley Ford, adjusts his helmet in his car during practice for the NASCAR Sprint Cup Series IRWIN Tools Night Race at Bristol Motor Speedway on August 23, 2013 in Bristol, Tennessee. (Photo by Kevin C. Cox/Getty Images)