Diana Nyad sits down with CNN Chief Medical Correspondent Dr. Sanjay Gupta . `` You are never too old to chase your dreams , '' she says after 53-hour swim . Nyad becomes first person to swim from Cuba to Florida without shark cage . TL;DR (CNN) --
Diana Nyad sits down with CNN Chief Medical Correspondent Dr. Sanjay Gupta . `` You are never too old to chase your dreams , '' she says after 53-hour swim . Nyad becomes first person to swim from Cuba to Florida without shark cage . This was Nyad 's fifth and final attempt to make 103-mile swim .