The Michael Phelps and the Weight of Gold

12 years and 23 gold medals made Michael Phelps one of the greatest Olympians of all time, but like the Butterfly stroke he was so proficient in, it wasn't without its ups and downs. And in the helter skelter of BMX racing, Marion Pajon has carried the Olympic hopes and dreams of Colombia on her shoulders but after serious injury comes the ultimate test, the hunger to win again.