Kurt Busch looks from the garage after practice for the NASCAR Bank of America Sprint Cup series auto race at Charlotte Motor Speedway in Concord, N.C. in 2014.

Terry Renna—AP

Kurt Busch looks from the garage after practice for the NASCAR Bank of America Sprint Cup series auto race at Charlotte Motor Speedway in Concord, N.C. in 2014.

Kurt Busch looks from the garage after practice for the NASCAR Bank of America Sprint Cup series auto race at Charlotte Motor Speedway in Concord, N.C. in 2014.

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