Triple Olympic champion Usain Bolt shattered his 200 metres world record when he clocked 19.19 seconds to win the World Championship gold medal.
The Jamaican athlete beat the mark of 19.30 he had set a year ago to the day at the Olympics in Beijing.
The top five sprinters all clocked under 20 seconds.
Bolt, 22, has become the only man ever to hold the 100 and 200 Olympic and world titles as well as the world records at the same time.
The athlete was unfazed by a false start triggered by Frenchman David Alerte. Once the starter's pistol went off, the Jamaican bolted from the blocks and took the lead within 20 metres.
He raced down the straight well ahead of everyone else, with only the clock to beat.