Sam Willoughby and Alise Post are also two of the best BMX racers in the world. Willoughby won the silver medal for Australia at the London Olympics in 2012, when Post finished 12th for the U.S. They're top contenders again this season on the World Cup tour, where Willoughby was sixth in the men's rankings and Post was third on the women's side. Post and Willoughby grew up together on the bikes, part of a generation of racers who have watched BMX turn from a niche sport to the X-Games to an Olympic sport that was introduced as way to draw younger crowds. More...