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Woman Attempting to Swim From Cuba to Florida

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A 49-year-old Australian woman is taking on a huge challenge.

Penny Palfrey wants to swim from Havana, Cuba, to the Florida Keys. Not only that, but she wants to do it without the protection of a wetsuit, flippers, or a shark cage.  

She is attempting to surpass a record that she set in 2011 for the longest unassisted swim.  

Palfrey will be shadowed by a crew of 15 people including medical personnel.

She told CNN she's both excited and nervous for the swim, which could take anywhere from 40 to 60 hours.