Chad Knaus, crew chief for driver Jimmie Johnson, right, talks with Brad Keselowski, left, during testing for the NASCAR Sprint Cup auto racing series at Charlotte Motor Speedway in Concord, N.C., Tuesday, Dec. 11, 2012. (AP Photo/Chuck Burton)

Associated Press
Chad Knaus, crew chief for driver Jimmie Johnson, right, talks with Brad Keselowski, left, during testing for the NASCAR Sprint Cup auto racing series at Charlotte Motor Speedway in Concord, N.C., Tuesday, Dec. 11, 2012. (AP Photo/Chuck Burton)
Chad Knaus, crew chief for driver Jimmie Johnson, right, talks with Brad Keselowski, left, during testing for the NASCAR Sprint Cup auto racing series at Charlotte Motor Speedway in Concord, N.C., Tuesday, Dec. 11, 2012. (AP Photo/Chuck Burton)
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