Rio Olympics 2016: Usain Bolt wins 200m gold, his eighth Olympic gold

Usain Bolt won the men's 200m to claim his second Rio 2016 gold, his eighth at an Olympics, and keep alive his hopes of an unprecedented 'treble treble'.The Jamaican ran 19.78 seconds to come home ahead of Canada's Andre de Grasse and France's Christophe Lemaitre.