Usain Bolt wins 100m gold, Justin Gatlin seco... Usain Bolt wins 100m gold, Justin Gatlin seco... Usain Bolt wins 100m gold, Justin Gatlin seco... BBC Usain Bolt took home gold in the 100m dash BBC Usain Bolt wins 100m gold, Justin Gatlin seco... «Би-Би-Си» Usain Bolt wins 100m gold, Justin Gatlin seco...