LAS VEGAS, NV - MAR 09, 2012: The NASCAR Sprint Cup teams take to the track for a practice session for the Kobalt Tools 400 race at the Las Vegas Motor Speedway in Las Vegas, NV.
LAS VEGAS, NV - MAR 09, 2012:  The NASCAR Sprint Cup teams take to the track for a practice session for the Kobalt Tools 400 race at the Las Vegas Motor Speedway in Las Vegas, NV.