Jamaica's domination of the sprint events at the Olympics was completed as Veronica Campbell-Brown took an impressive gold in the women's 200m.
Campbell-Brown beat Allyson Felix of the US into silver medal position, with fellow Jamaican Kerron Stewart claiming the bronze.
The defending champion produced a smooth performance to cross the finish line in a time of 21.74 seconds.
Felix ran a personal best time of 21.94, but it was not enough for gold.
It meant Felix had to settle for silver behind Campbell-Brown for the second Olympics in succession.
Jamaica have now won all four of the individual sprint events, with Usain Bolt taking the men's 100m and 200m in world record times and Shelly-Ann Fraser leading home a Jamaican clean sweep in the women's 100m.
In complete contrast to Felix, Campbell-Brown made a devastating start to the race and came into the home straight with a commanding lead.
She ran right through the line to clock the the fastest women's time in a decade and win her fifth Olympic medal overall.
"It means a lot - this one even more than the last Olympics because I missed out on the 100m," said Campbell-Brown, who failed to qualify for the 100m at the Jamaican trials.
"It wasn't really pressure but after Usain Bolt and everything I felt like I had to go out and do my part. I came out and executed a very good race."
Campbell-Brown's victory meant the US team will return home without a gold medal in the individual sprint events for the first time since they boycotted the 1980 Moscow Olympics.
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