The United States added to their overall lead in medals at the 2012 London Olympics on Friday, with the stars of the day the women's 4x100-meter relay team.
The US leads with 94 medals, including 41 gold, 26 silver, and 27 bronze medals. China remains in second place with 81 medals, including 37 gold, 25 silver, and 19 bronze. Russia, who won four gold and four bronze medals on Friday, is in third with 63 medals. Host Great Britain is in fourth with 57 total medals, including 25 gold.
Tianna Madison, Bianca Knight, and Los Angeles's own Allyson Felix and Carmelita Jeter set a new world record, running the final of the 4x100-meter relay at 40.82 seconds, beating Jamaica by 0.59 seconds.
The men's 4x400-meter relay team, with USC's Bryshon Nellum, took silver in their event with a time of 2:57.05, losing to the Bahamas by 0.33 seconds.
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