(CNN) – A sport that involves getting stung by jellyfish isn't for the faint of heart. But for one woman, extreme swimming is worth the pain and hours of training. Our Dr. Sanjay Gupta gives us this exclusive look at an amazing athlete.
(CNN) – A sport that involves getting stung by jellyfish isn't for the faint of heart. But for one woman, extreme swimming is worth the pain and hours of training. Our Dr. Sanjay Gupta gives us this exclusive look at an amazing athlete.