Jamaica's Usain Bolt (R) shakes hands with team mate and second-placed Yohan Blake after winning the men's 100m final during the London 2012 Olympic Games at the Olympic Stadium August 5, 2012. Bolt proved that lightning can strike twice by retaining the 100 metres sprint title, the most coveted of all Olympic golds, in a searing 9.63 seconds - the second fastest run of all time.
