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American Katie Ledecky has won her third Olympics gold medal in a row in the women's 800 meter freestyle in her final race of the Tokyo Games.
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Ledecky, considered the world's best female distance swimmer, led the race entire way. The 800 meter freestyle is one of her best events -- she set the world record in the event at the Rio Olympics in 2016.
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Ledecky's biggest rival, Ariarne Titmus of Australia, took silver. Italy's Simona Quadarella took bronze.
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