Athletics-Bolt secures third world sprint sweep as Jamaica win relay (Reuters)
(Adds U.S disqualification) By Nick Mulvenney BEIJING, Aug 29 (Reuters) – Usain Bolt secured a sweep of the sprint golds at a world championships for the third time when he helped Jamaica’s relay team to a fourth successive 4×100 metres title on Saturday. The 29-year-old, who had already won the 100 and 200 metres events, ran the anchor leg as the Jamaicans took gold in 37.36 seconds at the Bird’s Nest Stadium. The United States team featuring Justin Gatlin, who won silver behind Bolt in both individual sprints, botched their final handover between Tyson Gay and Mike Rodgers and were disqualified after finishing second.