Tori Bowie became the first double gold medalist at the world championships, anchoring the U.S. team to the 4x100-meter relay title ahead of Britain and Jamaica.
At the same time, Allyson Felix, running the second leg on the winning team, earned a record 15th medal at the world championships in a career going back to 2005.
Bowie, who won the 100 meters this week, ran a strong anchor leg, leaving behind the opposition to finish in 41.82 seconds.
Britain took silver in 42.12 and two-time defending champion Jamaica earned bronze in 42.19.
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