Mark Martin leads the pack at the start of the NASCAR Sprint 

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)
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