Driver Dale Earnhardt Jr., prepares for a practice session for Sunday's NASCAR Sprint Cup series auto race at Michigan International Speedway Friday, June 14, 2013, in Brooklyn, Mich. (AP Photo/Bob Brodbeck)

Associated Press
Driver Dale Earnhardt Jr., prepares for a practice session for Sunday's NASCAR Sprint Cup series auto race at Michigan International Speedway Friday, June 14, 2013, in Brooklyn, Mich. (AP Photo/Bob Brodbeck)
Driver Dale Earnhardt Jr., prepares for a practice session for Sunday's NASCAR Sprint Cup series auto race at Michigan International Speedway Friday, June 14, 2013, in Brooklyn, Mich. (AP Photo/Bob Brodbeck)
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