Katie Ledecky continued her assault on the Rio Olympics by annihilating the women's 400-meter freestyle world record to pick up her first gold medal of the games on Sunday.
Michael Phelps also extended his all-time record haul of Olympic medals with his 19th gold, helping the U.S. team to victory ahead of France and Australia in the men's 4 x 100-meter relay.
Ledecky came home in a time of 3 minutes, 56.46 seconds — almost 2 seconds faster than her own previous world-best mark of 3:58.37 — to add gold to the 4 x 100-meter freestyle silver medal she won with the United States team the previous night.