Diana Nyad, a 61-year-old endurance swimmer who attempted to become the first person to swim 103 miles between Cuba and Florida without a shark cage, ended her journey Tuesday.

About halfway through the journey, 29 hours later, Nyad had to stop and was brought onto a boat at 12:45 a.m. She was vomiting, and suffering from shoulder pain, asthma and ocean swells.

This was Diana Nyad's second attempt, and she had trained for two years for the event, swimming up to 12 hours per day.

"I am not sad. It was absolutely the right call," Diana Nyad said.