Usain Bolt reclaimed his world title in the 100 meters.The Jamaican posted a time of 9.77 seconds at the world championships in Moscow on Sunday two years after he was disqualified for a false start in the 2011 final in South Korea.With rain falling in the Russian capital, Bolt comfortably beat American Justin Gatlin and Jamaica's Nesta Carter.Bolt now owns six gold medals at the world championships to go along with his six golds at the Olympics.