Missy Franklin stands on the podium with her gold medal, after winning the 100m backstroke at the London 2012 Olympic Games. Of that moment, she says, "I was trying to sing, but I was like, crying, at the same time." Adam Pretty/Getty Images hide caption

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Oscar Pistorius of South Africa runs in the men's 200-meter event at the Paralympic World Cup in May. Some observers have suggested Pistorius receives an unfair advantage from his carbon-fiber "blade" legs. Michael Steele/Getty Images hide caption

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Animals and actors enter the stadium for the British meadow scene prior the opening ceremony of the London 2012 Olympic Games on Friday. Franck Fife/AFP/Getty Images hide caption

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Republican presidential candidate Mitt Romney arrives at Downing Street in London on Thursday to meet with British Prime Minister David Cameron. Oli Scarff/Getty Images hide caption

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Nathan Leeper of the United States jumps during the IAAF World Championships in this photo from 2001. A high jumper, Leeper is one of several athletes whose name suited their sport. Andy Lyons/Allsport/Getty hide caption

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International Olympic Committee spokesman Mark Adams points to a reporter at a London news conference Saturday. The Olympic event may have been the first to have product placement. Ed Hula III/Around the Rings hide caption

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Coal miner Lee Hipshire in 1976, shortly after emerging from a mine in Logan County, W.Va., at the end of his shift. A few years later, Lee took early retirement because of pneumoconiosis, or black lung disease. He died at 57. Courtesy of Earl Dotter hide caption

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Coal miners are tested for black lung. Recently, the deadly disease has been discovered in younger miners and at more advanced stages. David Deal for NPR hide caption

itoggle caption David Deal for NPR