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The 15-year-old was a surprise inclusion on the world championship team and could help the U.S. win again in London.

Alexandra Raisman tumbled her way to a bronze medal at the world gymnastics championships in Tokyo on Sunday.

McKayla Maroney becomes the third straight American to win the world vault title as the event finals begin at the 2011 World Gymnastics Championships.

While Jordyn Wieber has been racking up gold medals this week at the world championships in Tokyo, her parents have been in the stands supporting her.

Jordyn Wieber joins a great line of American world champions. They all own at least one Olympic medal and she will be a favorite going into London.

The world championships were almost moved from Tokyo because of the earthquake last March, but the event is on -- and has added significance.

The American gymnasts were unstoppable at the 2011 world gymnastics championships, overcoming injuries and an arduous training process.

Alexandra Raisman helped the American team qualify first into the finals of the World Gymnastics Championships.

The world's best are in Tokyo at the biggest gymnastics meet of the year. Up for grabs? Olympic qualifying and plenty of prestige.

The Americans are favored to win big at the world gymnastics championships, which start Friday in Tokyo. Here's who you'll want to know.