Drivers navigate Turn 4 as they approach the start of the NASCAR Sprint Showdown auto race at the Charlotte Motor Speedway in Concord, N.C., Friday, May 16, 2014. (AP Photo/Gerry Broome)
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Drivers navigate Turn 4 as they approach the start of the NASCAR Sprint Showdown auto race at the Charlotte Motor Speedway in Concord, N.C., Friday, May 16, 2014. (AP Photo/Gerry Broome)
