Women's 400m Freestyle Final | Rio 2016 Replays
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Women's 400m Freestyle Final | Rio 2016 Replays

The USA's Katie Ledecky smashes the world record and wins gold in women's 400m freestyle in Rio 2016.

Women's 400m Freestyle Final | Rio 2016 Replays

The USA's Katie Ledecky smashes the world record and wins gold in women's 400m freestyle in Rio 2016.