Tony Stewart wins at Las Vegas
Kobalt Tools 400
Credit: Getty Images for NASCAR
LAS VEGAS, NV - MARCH 11: Greg Biffle, driver of the #16 3M/Meguiars Ford, 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 Jerry Markland/Getty Images for NASCAR)
