Usain Bolt clinches gold in the men's 100m final at the 2013 World Championships in Moscow, Russia.
The six-time Olympic champion sprinted to victory in 9.77 seconds, beating American Justin Gatlin in second (9.85) and compatriot Nesta Carter (9.95).
Britain's James Dasaolu finished in last place with a time of 10.21.
Bolt says he wanted to do "much better" but was suffering from sore legs after his semi-final race.
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