Diana Nyad managed to stand unaided as she arrived at Smathers Beach in Key West after swimming for almost 53 hours.
The 64-year-old has become the first person to complete the swim from Cuba to Florida without using a shark cage.
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The EU will not hold talks with the UK until it triggers Article 50 to leave, Germany, France and Italy insist.
Jamie Oliver has launched an expletive-filled rant against Boris Johnson, calling on the public to ensure he does not become Prime Minister.
David Cameron has addressed Parliament for the first time since Britain voted to leave the European Union.