In this photo provided by Diana Nyad via the Florida Keys News Bureau, endurance swimmer Diana Nyad swims in the Florida Straits between Cuba and the Florida Keys Sunday, Aug. 19, 2012. Nyad is endeavoring to become the first swimmer to transit the Florida Straits from Cuba to the Keys without a shark cage. (AP Photo/Diana Nyad via the Florida Keys News Bureau, Christi Barli)
KEY WEST, Fla. (AP) - Endurance swimmer Diana Nyad has ended her fourth bid to swim from Cuba to Florida after four days of storms, jellyfish stings and shark threats.
Nyad's support team posted on her blog that the athlete made the call after being pulled from the water a day before her 63rd birthday.
Nyad left Havana on Saturday in her third attempt since last year to be the first person to swim the Florida Straits without a shark cage. She also failed once earlier to do so with a cage.