Usain Bolt emphatically confirmed his status as the greatest sprinter in history as he retained his Olympic 100m title in peerless fashion.
Bolt, doubted by many after a season dogged by defeat and injury, ran the second-fastest time ever to beat fellow Jamaican and training partner Yohan Blake into silver and American Justin Gatlin into bronze.
Bolt's 9.63 seconds, just 0.05 seconds slower than his own staggering world record, was a new Olympic best and capped a race in which seven men went under 10 seconds, with only the injured Asafa Powell failing to break that mark.
"I was happy when I went out in the first round, I felt I could do this," said the 25-year-old Bolt. "I was slightly worried about my start. I didn't want to false start again, so I sat in the blocks a little bit.
"It wasn't the best reaction in the world but I executed it and that was the key. My coach said 'stop worrying about the start because the best part of your race is the end'. It worked.
"I said it on the track, people can talk, but when it comes to championships, it is all about business for me - and I brought it."
He also praised the crowd inside the 80,000-capacity Olympic Stadium.