Mark Martin leads the pack at the start of the NASCAR Sprint Cup Series auto race, Sunday, March 3, 2013, in Avondale, Ariz. (AP Photo/Matt York)

Associated Press
Mark Martin leads the pack at the start of the NASCAR Sprint Cup Series auto race, Sunday, March 3, 2013, in Avondale, Ariz. (AP Photo/Matt York)
Mark Martin leads the pack at the start of the NASCAR Sprint Cup Series auto race, Sunday, March 3, 2013, in Avondale, Ariz. (AP Photo/Matt York)
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