American Katie Ledecky continued domination of the women's 800 meters freestyle with a brilliant swim to win gold.

In other events, Gretchen Walsh became the first American woman to win gold at the world championships in the 50m butterfly.

Ledecky held off Lani Pallister and Summer McIntosh in a tight race Saturday to win gold and extend her reign in the ...

The United States set the world record in the 4x100 freestyle mixed relay, clocking 3 minutes, 18.48 seconds in the swim ...

The Olympic swimmer, 28, won her seventh consecutive world title at the world championships in Singapore on Saturday, Aug. 2, ...

Ledecky won with a time of 8:05.62, both a world championships record and the fourth fastest time in the history of the 800m ...

Katie Ledecky stubbornly refused to give up her 800-meter freestyle crown Saturday at the world championships in Singapore, ...

The American great sealed her 23rd world title and seventh gold in Singapore, edging out Lani Pallister and Summer McIntosh ...