Article Photos: Earnhardt Jr.'s replacement makes early CMS exit

Nik Wallenda pumps his fist after walking a tightrope across the frontstretch before the NASCAR Bank of America 500 Sprint Cup series auto race in Concord, N.C., Saturday, Oct. 13, 2012. (AP Photo/Terry Renna)

Nik Wallenda pumps his fist after walking a tightrope across the frontstretch before the NASCAR Bank of America 500 Sprint Cup series auto race in Concord, N.C., Saturday, Oct. 13, 2012. (AP Photo/Terry Renna)