Usain Bolt has been stripped of one of his nine Olympic gold medals after it was confirmed that his 4x100m relay team-mate Nesta Carter tested positive for a banned substance at the 2008 Beijing Olympics.
An anomaly was discovered in Carter's submission following a decision by International Olympic Committee (IOC) to retest 454 doping samples from Beijing using the latest scientific analysis methods. It was found to contain banned stimulant, methylhexaneamine.





























