[Image via AP.]

Natalie du Toit, of South Africa, center, removes her prosthetic leg before the start of the women's marathon swimming during the Beijing 2008 Olympics in Beijing, Wednesday, Aug. 20, 2008. Portugal's Daniela Inacio, left, and Italy's Martina Grimaldi, right, look on. (AP Photo/Chuck Burton, IOPP, Pool) — AP

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