Usain Bolt win semi final to book place in Berlin final

Triple Olympic champion Usain Bolt produced another serene display to book his place in the 100m final at the World Championships in Berlin followed is performance in semi-final.Bolt recovered after causing the first false start to cruise through his semi-final in 9.89 seconds, while Britain's Tyrone Edgar was disqualified, Read more at bbc.co.ukSemi-final heat