11 of 12: This is a June 4, 2009, file photo showing South Africa's Oscar Pistorius competing in the men's 400 meter event during the 10th memorial Primo Nebiolo international track and field meeting, in Turin, Italy. The prosthetic legs of double-amputee sprinter Oscar Pistorius give the South African a 10-second advantage over a 400-meter race, according to a new study. (AP Photo/Massimo Pinca, File) ( Photo)

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