The American prodigy surged home to touch the wall in 3min 56.46sec, smashing her own world record of 3:58.37 set in the Gold Coast, Queensland in 2014.

	Jazz Carlin of Great Britain won silver while Leah Smith of the United States took bronze. 
	- AFP

Olympics: Ledecky smashes world record to win 400m freestyle gold

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Olympics: Ledecky smashes world record to win 400m freestyle gold

RIO DE JANEIRO - Katie Ledecky of the United States set a new world record on Sunday as she powered to the Olympic gold medal in the women's 400m freestyle.

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