Mark Martin in the #6 AAA Ford (C) hangs on to the wheel as he slides down the back stretch after colliding with Greg Biffle #16 Ford (L) during the 2006 Pepsi 400 NASCAR race at Daytona International Speedway in Daytona Beach, Florida July 1, 2006. Jeff Gordon in his #24 Chevrolet is shown in the background. [Reuters]