Mariana Pajon is the only Colombian athlete who has won two Olympic gold medals. The BMX champion opens up in an exclusive interview with the... Olympic Channel: "I joined a sport where there were no girls. They closed doors on me." The 28-year-old suffered innumerable injuries, "I have more fractures than world championships." But this didn't stop her and she is aming for a golden three-peat at Tokyo 2020.