Usain Bolt ready to go supersonic one last time for his Jamaica farewell

Sprint king is as big as Bob Marley in his home nation where he will take centre stage at a typically star-studded final track appearance there The long, lank boy in lane three is rigid with nerves. Understandably, given he is 15 years old and racing in the World Junior Championships 200m final against athletes three years his senior. Technically he is a mess too. When he runs his neck is cocked back and tilted rightwards, as if he has slept awkwardly and missed an osteopath's appointment. It ba...