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Driver Jimmie Johnson holds the checkered flag after winning the NASCAR Sprint Cup series Coca-Cola 600 auto race at the Charlotte Motor Speedway in Concord, N.C., Sunday, May 25, 2014. (AP Photo/Gerry Broome)

Driver Jimmie Johnson holds the checkered flag after winning the NASCAR Sprint Cup series Coca-Cola 600 auto race at the Charlotte Motor Speedway in Concord, N.C., Sunday, May 25, 2014. (AP Photo/Gerry Broome)