The Latest: Bolt leads Jamaica into 4x100 final; US advances

LONDON (AP) - The Latest from the world championships (all times local):

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11:10 a.m.

Usain Bolt and Justin Gatlin will meet in a final duel on the track after helping their teams qualify for the final of the 4x100-meter relay at the world championships.

The United States, with Gatlin ...
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