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A couple competes during the Tango Dance World Cup 2012, salon category, 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)