BMX is one of the hottest sports in the world. The 2008 Beijing Olympics marked the sports' debut at the games, and since then it has thrived among younger athletes. USA BMX is the national governing body of the sport, sanctioning more than 14,000 local BMX races and 300 BMX tracks. The organization puts on National Championship series consisting of 30 races, while sanctioning a 60-race region series. Check out our USA BMX gallery to see what this high-octane sport is all about. Photos: USA BMX