United States' Clayton Stanley, left, Russell Holmes, center, and William Priddy attempt to block a shot during a men's preliminary volleyball match against Russia at the 2012 Summer Olympics.
Associated Press
Britain's Jessica Ennis lands a jump during the long jump heptathlon during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London.
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Athletes compete in the 20-kilometer race walk at the 2012 Summer Olympics.
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South Africa's Oscar Pistorius starts in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London.
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Britain's David Greene reacts after competing in a men's 400-meter hurdles semifinal during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London, Saturday, Aug. 4, 2012. (AP Photo/Martin Meissner)
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Ethiopia's Tirunesh Dibaba poses for a photo with her gold medal for the women's 10,000-meter run during the athletics competition in the Olympic Stadium at the 2012 Summer Olympics.
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South Africa's Oscar Pistorius competes in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London.
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South Africa's Oscar Pistorius, center, leads Jamaica's Rusheen McDonald, left, Dominican Republic's Luguelin Santos, second left and Russia's Maksim Dyldin, right, in a men's 400-meter heat during the athletics in the Olympic Stadium at the 2012 Summer Olympics, London.
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Bronze medalists Valeria Sorokina, right, and Nina Vislova, of Russia, wave to the crowd from the podium of the badminton women's doubles at the 2012 Summer Olympics.
AP
China's Li Xuerui celebrates as she wins against Wang Yihan, also from China, in a women's singles badminton gold medal match of the 2012 Summer Olympics.
AP
Brazil's Alex Garcia (8) lays up a shot against China during their men's preliminary round basketball game at the 2012 Summer Olympics.
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Kristyna Kolocova of the Czech Republic celebrates after a three set win over favored Brazil during a beach volleyball match at the 2012 Summer Olympics.
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Britain's Dani King, left, Laura Trott, center, and Joanna Rowsell right, show their gold medals in the track cycling women's pursuit team event during the 2012 Summer Olympics in London. The British women's pursuit track cycling team shattered its own world record for the second time Saturday and beat the United States to win the Olympic gold medal.
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Gold medalist Joanna Rowsell of Britain celebrates after her team won the track cycling women's pursuit team event during the 2012 Summer Olympics in London.
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Ahmad Saber Hamcho, of Syria, and his horse Wonderboy compete during the equestrian individual show jumping at the 2012 Summer Olympics.
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The hooves of Bella Donna clear a fence while ridden by Meredith Michaels-Beerbaum, of Germany, during the equestrian individual show jumping competition, at the 2012 Summer Olympics.
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Nick Skelton, of Great Britain, rides his horse Big Star during the equestrian individual show jumping competition at the 2012 Summer Olympics.
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United States team members celebrate after defeating Russia in the bronze medal match in women's team epee fencing competition at the 2012 Summer Olympics.
Associated Press
United States' Courtney Hurley celebrates after her team defeated Russia in the bronze medal match in women's team epee fencing competition at the 2012 Summer Olympics.
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Australia's Mathew Belcher and Malcolm Page, left, compete during the 470 men class race at the London 2012 Summer Olympics.
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Annalise Murphy of Ireland competes during the Laser radial women race at the London 2012 Summer Olympics.
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France's Delphine Reau, left, hugs Slovakia's Zuzana Stefecekova after Stefecekova beat Reau in a shoot out for the silver medal, in the women's trap final, at the 2012 Summer Olympics.
Associated Press
Germany's Sonja Scheibl shoots in the rain during qualifiers for the women's trap event, at the 2012 Summer Olympics.
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United States' men's 4 X 100-meter medley relay team from left, Matthew Grevers, Brendan Hansen, Michael Phelps and Nathan Adrian hold their gold medals at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London.
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Gold medalists Mike Bryan, left, and Bob Bryan, right, of the United States, wave the U.S. national flag to fans after the medal ceremony of the men's doubles final match at the All England Lawn Tennis Club at Wimbledon, in London, at the 2012 Summer Olympics.
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Mike Bryan, top, and Bob Bryan, bottom, of the United States, celebrate after defeating Jo-Wilfried Tsonga and Michael Llodra of France in the men's doubles gold medal match at the All England Lawn Tennis Club at Wimbledon, in London, at the 2012 Summer Olympics.
Associated Press
Gold medalists Mike Bryan, left, and Bob Bryan, right, of the United States, listen to the U.S. national anthem during the medal ceremony of the men's doubles final at the All England Lawn Tennis Club at Wimbledon, in London, at the 2012 Summer Olympics.
Associated Press
Gold medalist Serena Williams shows her medal to fans after the medal ceremony of the women's singles final match at the All England Lawn Tennis Club at Wimbledon, in London, at the 2012 Summer Olympics.
Associated Press