Dwain Chambers returned to Britain's 4x100m relay yesterday and helped the team win the gold medal it was stripped of four years ago because of his doping.
Chambers ran the first leg and the British foursome won in 38.91 seconds, ahead of Poland and France. It was Britain's first gold at the competition.
Anchored by Chambers, Britain won the race in 2002 in Munich, Germany, but had to surrender the title to Ukraine because of Chambers' doping.
Chambers was also stripped of the 100 title he won in Munich. His bid to reclaim that gold here failed when he finished seventh in the sprint.
"I am smiling. I am so happy after all what happened in the last four years," Chambers said.
Darren Campbell, Marlon Devonish and Mark Lewis-Francis completed the winning British team. Campbell did not join the team for a lap of honor, apparently upset by comments reportedly made by some teammates and coaches.
Chambers tested positive for the steroid THG in November 2003.