Photos: Top sports stories of the year
Liukin's comeback falls flat
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2008 Olympic all-around gold medalist Nastia Liukin failed in her brief comeback bid at the 2012 U.S. Olympic Gymnastics trials. Liukin fell from the uneven bars twice during the two days of competition, ending her chances for a potential repeat. But, the world was introduced to a new group of young women who would dominate the Games in London.
