Katie Ledecky captures yet another gold in signature event at swimming worlds

• Ledecky's 1,500m gold is her 31st overall

• American now has two medals at Worlds

Katie Ledecky has ceded a tiny bit of ground in other events, but she's still unbeatable in the 1,500-meter freestyle.

She won it again Tuesday in the swimming world championships in Singapore, finishing in 15 minutes, 26.44 seconds. Simona Quadarella of Italy took silver in 15:31.79 - a European record - with bronze for Lani Pallister of Australia in 15:41.18 in a very quick-paced race.