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Bolt signs off with relay win to become World Championships' most successful athlete

By Mike Rowbottom at the Luzhniki Stadium in Moscow

Usain Bolt celebrates his third gold medal of the IAAF World Championships in Moscow after anchoring Jamaica to victory in the 4x100 metres relayAugust 18 - Fittingly, the athlete of the 14th International Association of Athletics Federations (IAAF) World Championships produced its final flourish as Usain Bolt became the event's most successful competitor in securing his third gold here by anchoring the Jamaican relay team to victory in a 4x100 metres relay which the United States needed to win to knock the hosts off the top of the final medals table.