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Now a three-time Olympian, the California native is one of the members trying to defend the 4x400-meter women's relay team title. Also the silver medalist in the 200 in the two previous Olympics, the 26-year-old Felix will attempt to capture the elusive individual gold in the event this time around, as well as race the 100 meter after American teammate Jeneba Tarmoh declined to take part in a run-off for the final spot on the U.S.

Text: Kevin Fixler, SI.com
Photo: Bill Frakes/SI

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