NASCAR Photo Gallery

Greg Biffle, driver of the #16 3M/OH/ES Ford, and Jimmie Johnson, driver of the #48 Lowe's/Kobalt Tools Chevrolet, lead the field on pace laps prior to the start of the NASCAR Sprint Cup Series Bojangles' Southern 500 at Darlington Raceway on Saturday in Darlington, S.C. (Photo Credit: John Harrelson/Getty Images for NASCAR)

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