Diana Nyad
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US woman starts swim from Cuba to Florida

8 August 2011 Last updated at 06:43 BST

A 61-year-old American woman is attempting to become the first person to swim from Cuba to the United States without the protection of a shark cage.

Diana Nyad set off from Havana late on Sunday. She is hoping to arrive in Key West in Florida on Wednesday.

Michael Voss reports.