Bolt signs off in style
A world championships which began with a disqualification for Usain Bolt ended with the Jamaican leaving Daegu with two gold medals and another world record.
Bolt was disqualified from the 100 metres final for a false start, but bounced back to defend his 200m in a superb time and tonight anchored his country's 4x100m relay team to gold in a world record of 37.04 seconds.
"For me it was just to go out there fast," said Bolt, who finished off the good work of team-mates Nesta Carter, Michael Frater and 100m champion Yohan Blake. "We did just that and I am proud of my team.
"I am happy with myself. I enjoyed being the anchor. I had a little problem with my Achilles. I can't run the bend so it was decided I would run the anchor and Yohan Blake ran a great bend."
Jamaica finished 1.16secs ahead of France, with St Kitts and Nevis claiming a surprise bronze when the United States and Great Britain failed to finish, America's Darvis Patton colliding with Britain's Harry Aikines-Aryeetey coming into the final changeover.
The United States did at least win the women's race ahead of Jamaica and Ukraine.
Elsewhere on the track, Britain's Mo Farah made up for the disappointment of being pipped to gold in the 10,000m by winning the 5,000m title in a thrilling last-lap sprint finish.
Farah held off American Bernard Lagat and Ethiopia's Imane Merga down the home straight, although Merga was then disqualified for running off the track, promoting compatriot Dejen Gebremeskel to third.
In the women's 800m, South African Caster Semenya was unable to retain her title, the 20-year-old being overhauled 10m from the line by Russia's Mariya Savinova.
Semenya had moved smoothly through the field after the bell to lead around the final bend, but Savinova produced a flying finish to win in one minute 55.87 seconds - the fastest in the world this year and just 0.42s slower than Semenya ran to win in Berlin two years ago before her triumph was marred by a gender row.
Kenya's Janeth Jepkosgei won bronze.
Semenya said: "Even though I got a silver I really enjoyed it, better than two years ago. I know I won gold in Berlin but I am feeling much better because I didn't expect to win a medal."
America's Christian Taylor won the triple jump with a brilliant leap of 17.96m - the ninth longest of all time - to leave defending champion Phillips Idowu (17.77m) of Great Britain in second place.
"I did not expect to jump this far," Taylor said. "It is a blessing. It means the world to be here but I will stay calm and keep working hard. This is a work in progress."
Russia's Tatyana Lysenko won gold in the women's hammer with 77.13m, with Germany's Betty Heidler second and China's Wenxiu Zhang third.