Jamaica's Usain Bolt (L) competes in the men's 100m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / FRANCK FIFE
(From L) Jamaica's Usain Bolt, Britain's James Dasaolu, Antigua and Barbuda's Daniel Bailey and Saint Kitts & Nevis' Jason Rogers compete in the men's 100m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / GABRIEL BOUYS
Jamaica's Usain Bolt crosses the finish line next to Britain's James Dasaolu after competing in the men's 100m heats at the athletics event of the London 2012 Olympic Games on August 4, 2012 in London. AFP PHOTO / GABRIEL BOUYS