Argentina

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Andy Roddick reacts during his match with Argentina's Juan Martin Del Potro in the quarterfinals of the 2012 US Open tennis tournament, Wednesday, Sept. 5, 2012, in New York. (AP Photo/Charles Krupa)

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Andy Roddick reacts as rain forces a delay in his match against Argentina's Juan Martin Del Potro in the quarterfinals of the 2012 US Open tennis tournament, Tuesday, Sept. 4, 2012, in New York. (AP Photo/Charles Krupa)

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Participants wait backstage before competing during the 2012 Tango Dance World Cup in Buenos Aires, Argentina, Monday, Aug. 20, 2012. The two-week long event offers more than 500 free dance lessons, concerts and recitals. Hundreds of professional dancers compete in the championship and teach many the eight basic steps of the dance in the city where it was born. (AP Photo/Natacha Pisarenko)

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Couples compete during the 2012 Tango Dance World Cup in Buenos Aires, Argentina. (AP Photo/Natacha Pisarenko)

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A couple competes during the Tango Dance World Cup 2012, salon category, in Buenos Aires, Argentina. Hundreds of professional dancers compete in the championship and teach many the eight basic steps of the dance in the city where it was born. (AP Photo/Natacha Pisarenko)

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Dancers get ready backstage before competing during the 2012 Tango Dance World Cup in Buenos Aires, Argentina, Monday, Aug. 20, 2012. (AP Photo/Natacha Pisarenko)

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A dancer combs his hair before a mirror before competing during the 2012 Tango Dance World Cup in Buenos Aires, Argentina, Monday, Aug. 20, 2012. (AP Photo/Natacha Pisarenko)

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Italy's dancers Eloina Martins, left, and Paolo Nelzi, second from left, among others, wait before competing during the 2012 Tango Dance World Cup in Buenos Aires, Argentina, Monday, Aug. 20, 2012. The two-week long event offers more than 500 free dance lessons, concerts and recitals. Hundreds of professional dancers compete in the championship and teach many the eight basic steps of the dance in the city where it was born. (AP Photo/Natacha Pisarenko)