The Edge The Edge Journey To Olympic Glory

Andy Soule, a U.S. Army veteran, lost both his legs to a bomb in Afghanistan in 2005. Four years ago, he won America's first medal — Olympic or Paralympic — in the biathlon event. David Gilkey/NPR hide caption

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Former Marine Josh Sweeney lost both of his legs to a bomb in Afghanistan in 2009. He's competing with the U.S. Men's Sled Hockey team at the Paralympics in Sochi. David Gilkey/NPR hide caption

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Russia RUS-1 bobsled team, with Alexander Zubkov, Alexey Negodaylo, Dmitry Trunenkov, and Alexey Voevoda, jump onto the medal stand after winning gold on Sunday. On the last day of the Sochi Games, Russia had already secured the top spot in the overall medal count. Dita Alangkara/AP hide caption

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The team from Russia RUS-1, with Alexander Zubkov, Alexey Negodaylo, Dmitry Trunenkov, and Alexey Voevoda, celebrate after winning gold during the men's four-man bobsled competition final at the 2014 Winter Olympics, on Sunday. Natacha Pisarenko/AP hide caption

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Finland's Teemu Selanne celebrates after scoring his team's fourth goal during the men's ice hockey bronze-medal game U.S. vs. Finland at the Bolshoy Ice Dome during the Sochi Winter Olympics on Saturday. Alexander Nemenov /AFP/Getty Images hide caption

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American Bode Miller inspired a question about terminal velocity, resistance, and friction with his skiing in Sochi. It's one of many technical questions that came up during the Winter Olympics. Olivier Morin/AFP/Getty Images hide caption

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Speedskaters from the U.S., Brian Hansen (from left), Jonathan Kuck and Joey Mantia, compete in the team pursuit speedskating race for seventh place at the Adler Arena Skating Center on Saturday. Patrick Semansky/AP hide caption

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Germany's Evi Sachenbacher-Stehle has left her country's Olympic contingent — and Sochi — after testing positive for a banned stimulant. She's seen here in the biathlon earlier this week; Sachenbacher-Stehle finished fourth. Odd Andersen/AFP/Getty Images hide caption

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From left to right, America's J.R. Celski, Jordan Malone, Christopher Creveling and Eduardo Alvarez celebrate taking silver in the men's short track 5,000-meter relay at the Iceberg Skating Palace in the Sochi Winter Olympics Friday. Yuri Kadobnov/AFP/Getty Images hide caption

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Canada's Jamie Benn (right) and Corey Perry celebrate a goal against America and goalie Jonathan Quick during the men's hockey semifinals in Sochi Friday. Alexander Nemenov/AFP/Getty Images hide caption

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Russia's Adelina Sotnikova (center) celebrates after receiving her gold medal in women's figure skating Thursday. South Korea's Yuna Kim (left) took silver, and Italy's Carolina Kostner won bronze. Antonin Thuillier/AFP/Getty Images hide caption

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The Canadian team celebrates Marie-Philip Poulin's winning overtime goal as American players try to recover from a game that seemed to be within their grasp in Sochi Thursday. Doug Pensinger/Getty Images hide caption

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Yuna Kim, of South Korea, won gold in Vancouver. She's leading the field after Wednesday's short program. Adrian Dennis/AFP/Getty Images hide caption

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U.S. silver medalists Elana Meyers, left, and Lauryn Williams pose after their final run in the women's bobsled Wednesday. Williams becomes only the second American in history to win medals in both the Summer and Winter Olympics. Alex Livesey/Getty Images hide caption

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An ice master checks the temperature of the ice rink at the Adler Arena Skating Center, site of the speedskating events at the Sochi Games. Patrick Semansky/AP hide caption

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