American Ledecky sweeps to fourth 1,500m freestyle world title
Ledecky, who won the women's 400 metres freestyle event on the opening day, cruised to the gold medal with a time of 15 minutes and 30.15 seconds. The 25-year-old finished more than 14 seconds ahead of compatriot Katie Grimes who took the silver while Australia's Lani Pallister took the bronze.


