sentences:  He finished the Olympics as the only American sprinter to medal in two individual events.Dix closed the season with two sub-10 second runs at the Weltklasse and Athletissima meetings, finishing second to a Jamaican on both occasions (Bolt and Asafa Powell).The year after the Olympics, Dix began the season with a world-leading time of 10.00 seconds in Tallahassee in April.