Yaroslava Bondarenko is a kid from the block who happened to have Olympic ambitions. She started making courses from what was available in local parking lots. That DIY attitude took her to Rio 2016, and she now has sights on Tokyo 2020.
Olympic BMX star Sarah Walker has lived through it all: the glory of an Olympic silver medal, the pain of breaking 18 bones, and the terrifying reality of a serious brain injury that changed her personality.