Associated Press
British-Australian swimmer Penny Palfrey says goodbye before beginning her bid to complete a record swim from Cuba to Florida, in Havana, Cuba, Friday, June 29, 2012. Palfrey aims to be the first woman to swim the Straits of Florida without the aid of a shark cage. Instead she's relying on equipment that surrounds her with an electrical field to deter the predators. (AP Photo/Ramon Espinosa)

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