Gold medallist Katie Ledecky of the United States poses with silver medallist Lauren Boyle of New Zealand and bronze medallist Jaz Carlin of Great Britain during the medal ceremony in the Women's 800m Freestyle Final at the 16th FINA World Championships in Kazan. Photograph: Adam Pretty/Getty Images
Katie Ledecky of the United States broke her own world record for 800 metres freestyle at the world swimming championships on Saturday.
Ledecky won the gold medal in eight minutes 07.39 seconds, to eclipse the previous record of 8:11.00 which she set in Texas last year.
It was Ledecky's fifth gold medal at the championships after she also won the 200m, 400m and 1500m individual titles and the 4x200m relay.
