American Allyson Felix defended her 200-meter title in style on Friday, surging down the home straight to win gold in the best time of the year. Felix, the youngest athlete to claim a sprint world title when she won as a 19-year-old in Helsinki two years ago, dashed across the line in 21.81 seconds to match Jamaican Marlene Ottey in winning back-to-back world championship 200-meter golds. World 100-meter and Olympic 200-meter champion Veronica Campbell looked to be in with a chance of a sprint double at the bend but Felix stormed past her and the Jamaican took silver in 22.34. (WCSN, WCSN.com)