Usain Bolt of Jamaica shows off his gold medal during the medal ceremony of the men's 100m during the 15th IAAF World Championships at the National Stadium in Beijing, Aug 24, 2015. Usain Bolt won the 100-meter title in Beijing on Sunday, crossing the line in 9.79 seconds to reassert his status as the fastest man on the planet. (Photo: China News Service/Fu Tian)
