Usain Bolt wins 100m world title in Moscow

Usain Bolt has won the men's 100m final at the World Athletics Championships in Moscow.

The Jamaican, who was disqualified from the 2011 final in Daegu, posted a time of 9.78 seconds ahead of America's Justin Gatlin.

Bolt's countryman Nesta Carter clinched the bronze medal.

Meanwhile, Great Britain's James Dasaolu could only finish last with a time of 10.21 seconds.