U.S. swimmers Conor Dwyer (left), Michael Phelps, Ryan Lochte, Ricky Berens poses on the podium with their gold medals after winning the men's 4x200m freestyle relay final at the London 2012 Olympic Games. Fabrice Coffrini/AFP/Getty Images hide caption

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Young Skywalker: Gabby Douglas helped solidify the U.S. women's team grip on gymnastics gold. The Americans beat Russia and Romania. Ronald Martinez/Getty Images hide caption

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The London Games have lived up to their hype as the first truly "social" Olympics. But social media like Twitter have also brought embarrassments, and even an arrest. NPR hide caption

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Venus Williams of the United States returns a shot to Aleksandra Wozniak of Canada in their Olympic singles tennis match, played at Wimbledon. Williams won, 6-1, 6-3. Clive Brunskill/Getty Images hide caption

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Record setter: U.S. swimmer Missy Franklin celebrates winning the women's 100m backstroke final at the London 2012 Olympic Games. Martin Bureau/AFP/Getty Images hide caption

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U.S. gymnast John Orozco runs through his pommel horse routine, in the Olympic men's team final at the 02 North Greenwich Arena in London. The Americans fell short of the promise they established in qualifying rounds. Thomas Coex/AFP/Getty Images hide caption

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In a mostly empty Olympic Stadium, Austin Playfoot lights the Olympic cauldron Monday morning. The cauldron was extinguished Sunday night, so it could be moved to one end of the stadium. Click the enlargement to see a close-up view. Jeff J Mitchell/Getty Images hide caption

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Sam Griffiths of Australia, and his horse Happy Times, compete in the cross country phase of the equestrian eventing competition in London's Greenwich Park. John MacDougall/AFP/Getty Images hide caption

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Australia's Jamie Dwyer, who scored three goals against South Africa in field hockey Monday, goes horizontal in London's Riverbank Arena. The South African goalie matched Dwyer's strategy, but Australia won, 6-0. Daniel Berehulak/Getty Images hide caption

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Satoshi Shimizu (left) of Japan celebrates his 10-9 points decision over Isaac Dogboe of Ghana, in their Round of 32 bantamweight bout at the 2012 London Olympic Games. The first full day of competition brought many close finishes in London. Jack Guez/AFP/Getty Images hide caption

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Ryan Lochte smiles on the podium with his new gold medal after winning the men's 400m individual medley in London Saturday. Lochte is wearing a dental accessory known as grillz, in the shape of the American flag. Fabrice Coffrini/AFP/Getty Images hide caption

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Silver medalists Brady Ellison, Jake Kaminski and Jacob Wukie of the United States, gold medalists Michele Frangilli, Marco Galiazzo and Mauro Nespoli of Italy, and bronze medalists Kim Bub-min, Im Dong-hyun and Oh Jin-hyek of South Korea stand with their medals after the men's team archery event. Paul Gilham/Getty Images hide caption

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Rigoberto Uran of Colombia leads a group of riders as they ride up Boxhill on the outskirts of London, during the men's cycling road race for the 2012 London Olympic Games. Miguel Medina/AFP/Getty Images hide caption

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A scene from the Opening Ceremony of the London 2012 Olympics. The event was widely praised — but in the U.S., not all viewers were enthused. Richard Heathcote/Getty Images hide caption

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Archer Im Dong-hyun (right) of South Korea inspects his target after breaking the world record during the men's ranking round Friday. Paul Gilham/Getty Images hide caption

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