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Usain Bolt guided Jamaica to victory in the sprint relay in Moscow to become the most successful athlete in the history of the World Championships. The 26-year-old added 4x100m gold to his 100m and 200m triumphs and now has a total of eight golds and two silvers. Carl Lewis and Allyson Felix also have 10 medals but have eight golds, one silver and a bronze respectively. Jamaica won in 37.36 seconds with the United States second and Canada third after Great Britain were disqualified.