Ledecky breaks own world record in 400m freestyle final

U.S. swimming star Katie Ledecky set a new world record in the 400m freestyle final Sunday night, winning her second medal at Rio 2016 in a time of 3:56.46.

Ledecky is quickly racking up medals, tallying two at Rio 2016 for a total of three in her short career.

The 19-year-old star is still set to compete in three more events as the odds-on favorite to take both the 200m and 800m freestyle.

Ledecky owns the world record in the 400m, 800m, and 1500m freestyles, the latter of which is not contested at the Olympics. She'll look to advance in the 200m free on Monday as the heats take place in the afternoon.