American Tianna Madison finished fourth in 10.85 seconds, just ahead of American Allyson Felix in fifth.

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Shopper and witness Tianna Doan told the newspaper the employee was a cashier who was hit with the object and had a head injury.

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"The train ride was very different, " Terps senior Tianna Hawkins said.

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The U.S. quartet included Allyson Felix and Carmelita Jeter, who took gold and bronze, respectively, in the women's 200-meter run, and Tianna Madison and Bianca Knight.

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Though winner Carmelita Jeter (10.92) and runner-up Tianna Madison (10.91) secured Olympic berths, it appeared that Jeneba Tarmoh had edged three-time Olympic medalist Allyson Felix by a hundredth of a second for the third and final spot.

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