Alex Zanardi celebrates winning the gold medal in the men's individual H4 time trial cycling final at the London 2012 Paralympic Games at Brands Hatch circuit, in Kent, southern England. Zanardi's legs were amputated after a racecar crash in 2001. Leon Neal/AFP/Getty Images hide caption

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U.S. swimmer Bradley Snyder poses with his gold medal after winning the men's 100m freestyle - S11 final at the London 2012 Paralympic Games. Ben Stansall/AFP/Getty Images hide caption

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Rob Jones and Oksana Masters will compete in adaptive rowing at the London Olympics this week. Jones is a former U.S. Marine who lost both legs to an improvised land mine in southern Afghanistan. David Gilkey/NPR hide caption

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A team of torchbearers brings the Paralympic flame through Piccadilly Circus as the torch heads across London to the Olympic Stadium. The Paralympic Games' opening ceremony will be held Wednesday at 3:30 p.m. ET. LOCOG/Getty Images hide caption

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Three photos show the Olympic flame slowly extinguishing at London's Olympic Stadium, as the London 2012 Games come to an end. The next Summer Olympics will be in Rio de Janeiro, Brazil. Damien Meyer/AFP/Getty Images hide caption

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Gabby Douglas sits in the Olympic Media Lounge at Westfield Stratford City in London. During the Olympics, Douglas' Facebook fanbase grew by nearly 4,000 percent. Alex Grimm/Getty Images for adidas hide caption

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Sir Chris Hoy of Great Britain cries as he celebrates winning the men's keirin track cycling final. In shedding Olympic tears, Hoy was far from alone in Britain. Pascal Le Segretain/Getty Images hide caption

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Fireworks explode at London's Olympic Stadium during the closing ceremony of the Summer Olympics. The gala has gotten good reviews — with the exception of those troubled by NBC's presentation. Thomas Coex/AFP/Getty Images hide caption

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Phelps dives into the pool for his last Olympic race. He says that his plans for post-Olympic life include finally seeing the cities he's competed in. Al Bello/Getty Images hide caption

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Usain Bolt of Jamaica celebrates his relay team's world record by doing the "mobot" move, made famous by Mo Farah of Britain. Bolt crossed the finish line in front of Ryan Bailey of the United States. Mike Hewitt/Getty Images hide caption

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Brigetta Barrett competes in the women's high jump final Saturday in London's Olympic Stadium. She won the silver medal. Stu Forster/Getty Images hide caption

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Mo Farah of Great Britain celebrates as he crosses the finish line to win gold ahead of Dejen Gebremeskel of Ethiopia and Thomas Pkemei Longosiwa of Kenya. Farah, who has become a celebrity in Britain, is the sixth man to win both the 5,000m and 10,000m distances at one Olympics. Michael Steele/Getty Images hide caption

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Oribe Peralta of Mexico celebrates scoring his second goal as Mexico beat Brazil, 2-1, to win Olympic gold medal in London's Wembley Stadium. Michael Regan/Getty Images hide caption

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France's gold medalist Julie Bresset (center), Germany's silver medalist Sabine Spitz (left) and U.S. bronze medalist Georgia Gould stand on the podium of the women's cycling cross-country mountain bike event in Benfleet, England. Carl De Souza/AFP/Getty Images hide caption

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