Katie Ledecky tops Pallister, McIntosh in swim worlds epic; Gretchen Walsh adds gold

In what may have been the best championship race of her career, Katie Ledecky won an 800m freestyle that lived up to the hype, becoming the first swimmer to capture a seventh world title in one event. Ledecky swam 8:05.62 to beat Australian Lani Pall... [6494 chars]