August 11, 2012
Jamaica's Usain Bolt, right, crosses the finish line ahead of Ryan Bailey of the United States in the men's 4x100-meter relay final at the 2012 Summer Olympics in London on Saturday, Aug. 11, 2012. Jamaica set a new world record with a time of 36.84 seconds.
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2012 SUMMER OLYMPICS: Bolt, Jamaicans close Olympics with another gold, world record; U.S. takes silver
Usain Bolt blisters the track as he runs the anchor leg of the men's 4x100 relay final Saturday, lifting Jamaica to its second consecutive gold medal and smashing the world record with a time of 36.84, while the U.S. gives chase at the end but has to settle for silver.