A relaxed Usain Bolt led a quartet of Jamaicans into the world 100 meters final later on Sunday by flexing his legs to win his semi-final in 9.92 seconds. Bolt, looking to regain the world title he lost to compatriot Yohan Blake in 2011 after infamously false-starting and suffering disqualification from the final, stepped up his efforts from Saturday's first-round heat. The six-times Olympic gold medalist eased through a few gears to overhaul Mike Rodgers, joining compatriots Nickel Ashmeade, whose 9.90 was the fastest of the three semis, Kemar Bailey-Cole and Nesta Carter in the 1750 GMT final in Moscow's Luzhniki stadium. Completing the final line-up were Americans Rodgers and Justin Gatlin, Briton James Dasaolu and Frenchman Christophe Lemaitre. (For more sports news and updates, follow Ahram Online Sports on Twitter at@AO Sportsand on Facebook atAhramOnlineSports) http://english.ahram.org.eg/News/78801.aspx