05 AUG 2012 - LONDON, GBR - Usain Bolt (JAM) of Jamaica beats Daniel Bailey (ANT) of Antigua (left) and Dwain Chambers (GBR) (centre) of Great Britain during his men's 100m semi final during the London 2012 Olympic Games athletics in the Olympic Stadium at the Olympic Park in Stratford, London, Great Britain .(PHOTO (C) 2012 NIGEL FARROW)