Nastia Liukin: Dara Torres, Nastia Liukin show why Olympians keep trying

Nastia Liukin laid face-first on the mat, her hopes of making a second Olympic team officially gone, and she knew it.SAN JOSE, Calif. -- Nastia Liukin laid face-first on the mat, her hopes of making a second Olympic team officially gone, and she knew it. For a split second Liukin remained motionless.The 2008 champion tumbles from the uneven bars at Sunday's trials, but is philosophical in defeat.45-year-old swimmer trying to make squad for a sixth time one night after Beijing Games

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