Matt Crafton (88) Thorson Chevrolet Silverado driver was fastest at the end of the practice session for the NASCAR Camping World Truck Series

James Buescher (31) Steve Turner Chevrolet Silverado during practice session for the NASCAR Camping World Truck Series

Brendan Gaughan (62) Rick Ware Toyota Tundra during practice session for the NASCAR Camping World Truck Series

Matt Crafton (88) Thorson Chevrolet Silverado driver was fastest at the end of the practice session for the NASCAR Camping World Truck Series

Johnny Sauter (13) Mike Curb Chevrolet Silverado driver was quick in the second practice session for the NASCAR Camping World Truck Series

Ron Hornaday Jr (2) Kevin Harvick Racing KHR Chevrolet Silverado driver during the second practice session for the NASCAR Camping World Truck Series

Austin Dillon (3) Richard Childress Racing RCR Chevrolet Silverado driver during the second practice session for the NASCAR Camping World Truck Series

Representatives from Chevrolet unveil the company's 2012 IndyCar series car at the IZOD Indycar Word Series Championships Presented by Honda

Mark Kent, Director of GM Racing, speaks as Jim Campbell, Chevrolet's U.S. Vice President for Performance Vehicles and Motorsports, looks on during the unveiling of the Chevrolet 2012 IndyCar series engine at a press conference during the IZOD Indycar Word Series Championships Presented by Honda

Ron Hornaday wins the pole for the Smith's 350 at the Las Vegas Motor Speedway

Ron Hornaday wins the pole for the Smith's 350 at the Las Vegas Motor Speedway

Ron Hornaday wins the pole for the Smith's 350 at the Las Vegas Motor Speedway