Berlin:Usain Bolt extended his stunning domination in the sprints on Thursday, adding the 200-meter gold to his tally at the world championships with yet another world record.
Gritting his teeth and pointing to the clock as soon as the record flashed, Bolt is now 5-for-5 in major sprint events, winning gold each time with a world record.
His time of 19.19 slashed .11 seconds of the mark he set last year, four days after breaking his 100 record by the same margin.
Alonso Edward of Panama was second, a massive .62 seconds behind Bolt. Wallace Spearmon of the United States took bronze.
Defending champion Tyson Gay was out with an injury.
Earlier, Yusuf Saad Kamel of Bahrain and Kenenisa Bekele of Ethiopia started their chase for their own doubles.
After winning the 10,000 on Monday, Bekele was dominant again and crossed first in his heat of the 5,000.
The Ethiopian great won a long-distance double at the Beijing Olympics and adding two more golds in Berlin would establish him as perhaps the greatest distance runner Africa has had.
Running on two hours sleep, Kamel followed up victory in the 1,500 late on Wednesday with a win and easy qualification for the semifinals in the 800.
"I did not sleep last night because I was very excited," said the Kenyan-born Bahraini, the son of two-time 800 world champion Billy Konchellah.
Favorites Yuriy Borzakovskiy of Russia and Abubakere Kaki of Sudan qualified alongside him.
Olympic hurdles champion Dayron Robles had a bad day, however.
The world-record holder had been slowed by a hamstring injury the past few weeks and after hitting the first three hurdles in his semifinal, he cried out in agony, grabbed his leg and slowed to a stop.
Robles had to be helped off the track, unable to lean to take any pressure on his left leg. It left the final late Thursday wide open.
In the men's pole vault, another Olympic champion was in trouble.
Steve Hooker made it to Saturday's final on a bad leg with his only jump of 5.65 meters, but was unsure whether he could continue.
"I am not sure about my appearance in the final," Hooker said. "It is just that I am not healthy."
Defending champion Brad Walker of the United States pulled out of the event before qualifying with a pelvic injury.
Thursday also has finals in the decathlon and the women's 400 hurdles and high jump.
A day after winning her first 800 world title amid a gender test controversy, teenager Caster Semenya was unruffled by the controversy when she accepted gold on the medal podium, grinning and singing along with the South African anthem.
Semenya dominated her rivals despite revelations that she was undergoing a gender verification test because of concerns she does not meet the requirements to compete as a woman.
"She said to me she doesn't see what the big deal is all about," South Africa team manager Phiwe Mlangeni-Tsholetsane said. "She believes it is God given talent and she will exercise it."