South Africa’s Oscar Pistorius and Willem de Beer react after their team did not finish in the men’s 4x400m relay round 1 heat during the London 2012 Olympic Games

Oscar Pistorius (right), Willem de Beer and South Africa will run in Friday's 4x400 relay final. (David Gray/Reuters)

Oscar Pistorius (right), Willem de Beer and South Africa will run in Friday’s 4×400 relay final. (David Gray/Reuters)

South Africa’s Oscar Pistorius (R) and Willem de Beer react after their team did not finish in the men’s 4x400m relay round 1 heat during the London 2012 Olympic Games at the Olympic Stadium August 9, 2012. REUTERS/David Gray (BRITAIN – Tags: OLYMPICS SPORT ATHLETICS)