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Kobalt Tools 400

LAS VEGAS, NV - MARCH 11: Tony Stewart, driver of the #14 Mobil 1/Office Depot Chevrolet, pits during the NASCAR Sprint Cup Series Kobalt Tools 400 at Las Vegas Motor Speedway on March 11, 2012 in Las Vegas, Nevada. (Photo by Tom Pennington/Getty Images)

NASCAR: Kobalt Tools 400

All the action from the Kobalt Tools 400 in Las Vegas.