Jamaica's athletics win: Your reaction
10 August 2012 Last updated at 19:09 BST
Usain Bolt has become the first man to retain both Olympic sprint titles.
Bolt's team-mates, Yohan Blake and Warren Weir, won silver and bronze respectively in the men's 200m final.
At least 900 jubilant Jamaican nationals watched the race at Jamaica House in the North Greenwich Arena in London.
The BBC News website reader Charlene Sarao filmed the crowd celebrating the trio's momentous achievement.