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.
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.
Ledecky's biggest rival, Ariarne Titmus of Australia, took silver. Italy's Simona Quadarella took bronze.