South Africa's Oscar Pistorius (R), Luguelin Santos (C) of the Dominican Republic and Jamaica's Rusheen McDonald run in their men's 400m round 1 heat at the London 2012 Olympic Games at the Olympic Stadium August 4, 2012. REUTERS/Lucy Nicholson (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS) - RTR3632F
South Africa's Oscar Pistorius (R), Luguelin Santos (C) of the Dominican Republic and Jamaica's Rusheen McDonald run in their men's 400m round 1 heat at the London 2012 Olympic Games at the Olympic Stadium August 4, 2012. REUTERS/Lucy Nicholson (BRITAIN - Tags: OLYMPICS SPORT ATHLETICS) - RTR3632F