Barack Obama has led the tributes to Nelson Mandela saying that South Africa's democracy is his 'cherished legacy.'
The 64-year-old woman who swam from Cuba to Florida without the aid of a shark cage is set to answer her critics over whether she cheated.
Cuba's revolutionary former leader Fidel Castro and Pope Benedict had a head-to-head on the pontiff's visit to Cuba.
Cuban President Raul Castro is speaking at the memorial service for Nelson Mandela.
He described Mandela as the "ultimate symbol of dignity and unwavering dedication to the revolutionary struggle for freedom and justice".
Diana Nyad has become the first person to swim from Cuba to Florida without a shark cage on her fifth attempt.
US veteran long-distance swimmer Diana Nyad tried to smile for the cameras after completing her 110-mile journey from Cuba to Florida without a shark cage.
Ms Nyad, whose face was swollen, was placed on a stretcher and hydrated with an intravenous drip before being taken to hospital by ambulance.
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.
US veteran long-distance swimmer Diana Nyad swam approximately 110 miles from Cuba to Florida in 52 hours, 54 minutes and 18.6 seconds, her support team announced.
They wrote on her Twitter account:
US swimmer Diana Nyad said people should "never ever give up" after she completed her fifth attempt at swimming from Cuba to Florida without a shark cage.
Looking sunburnt and with a swollen face, Ms Nyad said she had "three messages" after swimming approximately 110 miles.
She continued: "One is we should never ever give up. Two is, you are never too old to chase your dreams.
"Three is, it looks like a solitary sport but it's a team..." before she collapsed her head onto her friend's shoulder.
US President Barack Obama has congratulated swimmer Diana Nyad after she became the first person to complete the journey from Cuba to Florida without a shark cage.
He wrote on Twitter:
Congratulations to @diananyad. Never give up on your dreams.
US veteran long-distance swimmer has achieved her dream to swim from Cuba to Florida without a shark cage on her fifth attempt.
Her support team wrote on Twitter that her victory "proves dreams do come true":