Oscar Pistorius: Oscar Pistorius redefining perceptions by competing in Olympics

South Africa's Oscar Pistorius competes during a preliminary heat of the men's 400 meters. (REUTERS/Phil Noble). With the crowd at Olympic Stadium cheering him on, Oscar Pistorius crouched in the starting blocks Saturday and couldn't help but smile.Moments later, Oscar Pistorius took off and the click-click-clicking of carbon on the ground was all but drowned out by the 80000 fans on hand to watch him make history Saturday. The first amputee to compete in track at the Olympics,

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