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Washington Redskins quarterback Robert Griffin III dives for a first down during the first half of an NFL preseason football game against the Indianapolis Colts on Saturday, Aug. 25, 2012, in Landover, Md. (AP Photo/Richard Lipski)

Luck, Griffin impress; Redskins top Colts

The Washington Redskins celebrate an NFL preseason victory over the Indianapolis Colts on Saturday, Aug. 25, 2012.