US swimmer Diana Nyad said this will be her final attempt at making the 103-mile journey from Cuba to Florida without a shark cage.
Ms Nyad said before beginning the gruelling swim, "I'm learning as I get older, and I'm really getting older now, that there's a fine line between having grace and letting go of something that you have no control over and you're just not going to beat, like Mother Nature maybe."
More top news
TV veteran Sir Bruce Forsyth has died at the age of 89
Police say two were killed and a further six wounded after the attack in western Finland.
Longer spells of rain across eastern Scotland with a weather warning in place until 6pm.