American sprinters smash 27-year-old world record to win 4x100m relay
20:58 GMT, 10 August 2012
The United States showed Britain's sprinters how it is done to win the women's 4x100m relay in a world record of 40.82 seconds.
The team of Tianna Madison, Allyson Felix, Bianca Knight and Carmelita Jeter raced away from their closest challengers Jamaica to take gold.
The Jamaicans ran a national record of 41.41, but still finished well adrift, while Ukraine took the bronze.
Victory roar: Carmelita Jeter celebrates as she crosses the line in the 4x100m relay…
…and points at the clock which displays a new world record
Time to celebrate: Tianna Madison, Carmelita Jeter, Bianca Knight and Allyson Felix with the new record
Mind the gap: Carmelita Jeter leads home Jamaica's Kerron Stewart