Gold medalist Katie Ledecky of the United States poses on the podium during the medal ceremony for the Women's 800m Freestyle on Day 7 of the London 2012 Olympic Games at the Aquatics Centre on August 3, 2012 in London, England.
Dana Vollmer. had surgery to correct a serious heart condition in 2003. She battles a secondary condition that sometimes causes her heart to stop at random. She has just won Olympic gold at London 2012 http://l2012.cm/O9OOM7