For over a year, Dr. Sanjay Gupta has been following 62 year old endurance swimmer Diana Nyad's journey to become the first person to swim between Cuba and Florida without a shark cage.
To even attempt this dream, Diana had to secure visas from both Cuba and the US, get boats, drivers, safety divers, meteorologists, shark experts and a navigator to support her as she's swimming.
Although Nyad ultimately was unable to complete her journey, her story is nothing short of incredible.
Dr. Gupta discusses Nyad's mission on American Morning today, explaining what exactly caused her to stop her swim.
To see the rest of Diana's story, and never before seen video of the moment Diana decided to get out of the water, tune into CNN on Saturday night at 8pm.