Kenny Coolbeth Jr. Wins Knoxville Half-Mile

#2 Kenny Coolbeth Jr. takes his 28th career victory at the AMA Pro Harley-Davidson Insurance Knoxville Half-Mile Flat Track Grand National Championship. Watch highlights from Coolbeth's dominate performance in Iowa, and how he overcame a broken tibia and fibia nine weeks prior for his first victory of the 2012 season.