Biffle leads Chase drivers in Charlotte qualifying
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Credit: Getty Images for NASCAR
DARLINGTON, SC - MAY 12: Jeff Burton, driver of the #31 BB&T Chevrolet, leads Greg Biffle, driver of the #16 3M/OH/ES Ford, during the NASCAR Sprint Cup Series Bojangles' Southern 500 at Darlington Raceway on May 12, 2012 in Darlington, South Carolina. (Photo by Tom Pennington/Getty Images for NASCAR)
