Superstar gymnast Simone Biles could become the first woman since 1968 to repeat as the gold medalist in the individual all-around competition. But WSJ's Louise Radnofsky says that, for Biles, continuing to compete at the sport's highest level is also about keeping a spotlight on the crimes committed by former team doctor Larry Nassar. As the last self-identified survivor on the team, Biles is still pushing for more answers from USA Gymnastics.

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