U.S. long-distance swimmer Diana Nyad is pictured before attempting to swim to Florida from Havana August 31, 2013. Nyad jumped into the calm, turquoise waters of Cuba on Saturday and began making her way towards home, Key West Florida, in pursuit of a dream that she says nearly cost her life during a previous attempt last year. Her biggest challenges during the 103 mile (166-km) swim, apart from fatigue, will be the poisonous jelly fish that float through the Florida Straits, the sharks, the man o'wars, storms, waves and the powerful and unpredictable Gulf Stream, the mighty ocean current that flows west to east between Cuba and Florida. REUTERS/Enrique De La Osa (CUBA - Tags: SPORT SWIMMING) © Bild: Reuters/ENRIQUE DE LA OSA Rekordversuch 01.09.2013 64-Jährige schwimmt von Kuba nach Florida Extremsport: Es ist der fünfte und vermutlich letzte Versuch der Langstreckenschwimmerin Diana Nyad. © Bild: Reuters/ENRIQUE DE LA OSA U.S. long-distance swimmer Diana Nyad is pictured © Bild: APA/Ernesto Mastrascusa CUBA SWIMMING © Bild: APA/Alejandro Ernesto CUBA SWIMMING © Bild: Reuters/ENRIQUE DE LA OSA U.S. long-distance swimmer Diana Nyad arrives for © Bild: APA/CHRISTI BARLI - FLORIDA KEYS NEW CUBA SWIMMING USA NYAD © Bild: Reuters/Ho AUSTRALIAN SWIMMER LANDS KEY WEST © Bild: Reuters/ENRIQUE DE LA OSA U.S. long-distance swimmer Nyad jumps into the wat