Usain Bolt Wins Gold Medal in 200m Final at IAAF Championship in Daegu South Korea, USA Walter Dix Takes Silver

Usain Bolt wins gold in 200m at IAAF World Championships in Daegu, South Korea. Bolt, who was disqualified after a false start in the 100m six days ago, redeemed himself by running the third fastest time in his career. Bolt ran the race in 19.40 seconds. He becomes the first man since Calvin Smith in 1987 to retain a 200m world title. USA's Walter Dix took silver in 19.70 secs with France's Christophe Lemaitre running his personal best to take bronze in 19.80 secs.