Jamaican Usain Bolt confirmed his status as the greatest sprinter of all-time by successfully defending his Olympic 100m title in the second fastest time ever recorded.
Bolt won in a sizzling 9.63 seconds ahead of training partner Yohan Blake (9.75) and American Justin Gatlin (9.79) in a race where the top seven finishers all broke the 10-second barrier.
The only time anyone has ever run faster than Bolt's winning time on Sunday, was when the Jamaican superstar clocked 9.58 at the 2009 world championships in Berlin.
Bolt joined Carl Lewis as only the second man to go back-to-back in track's biggest race.
But he had seemed unusually vulnerable coming into the London Games.
He was sensationally disqualified for a false start in the 100m final at last year's world titles and was beaten by Blake in the 100m and 200m at the Jamaican trials.
There was also a suggestion of a hamstring injury.
But when the big moment came, Bolt delivered in spades.
He and silver medallist Blake - nicknamed The Beast because of his remarkable work ethic in training - did a joyous lap of honour before another heaving capacity crowd of 80,000 at the Olympic Stadium.
Bolt's victory came 24 hours after fellow Jamaican Shelly-Ann Fraser-Pryce also successfully defended the women's 100m title she won in Beijing.
Bronze medallist Gatlin had won the 2004 Olympic 100m title before serving a four-year doping ban.