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Olympic champion swimmer Michael Phelps warms up before
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Olympic champion swimmer Michael Phelps warms up before the men's 100m freestyle, where he took 7th place, at the Phillips 66 USA Swimming National Championships at William Woollett Jr. Aquatics Center in Irvine, Calif., on Wednesday, Aug. 6, 2014.(Credit: MCT / Allen J. Schaben)

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US swimming championships

Scenes from USA Swimming's 2014 Phillips 66 National Championships from Aug. 6-10 in at William Woollett Jr. Aquatics Complex in Irvine, Calif.