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Olympic highlights: Photos from Days 1-4

Dana Vollmer (right) of the United States celebrates a gold medal victory with teammate Claire Donahue

Photo: Adam Pretty/Getty Images

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Another gold for Team USA

Dana Vollmer (right) of the United States celebrates with teammate Claire Donahue after winning a gold medal and setting a world record time of 55.98 seconds in the women's 100-meter butterfly final on Day 2 inside London's Aquatics Centre.