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KAZAN, Russia (AP) American teenager Katie Ledecky has improved her own world record in the 1,500-meter freestyle at the swimming world championships.
The 18-year-old Ledecky completed the marathon-like race in 15 minutes, 27.71 seconds - shaving 0.65 seconds off the mark she set at last year's Pan Pacific championships in Australia.
The swim came during morning heats Monday. She'll have a chance to improve it again in Tuesday's final.
It's the fourth time Ledecky has broken the record in the 1,500. She also holds world marks in the 400 and 800 free.
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