Dancers perform onstage on the Avenue de Mayo in Buenos Aires, Argentina, Dec. 5, 2009 as the city celebrates its annual Dia del Tango (Tango Day) that draws citizens to dance in the open air. (Xinhua/Martin Zabala) Dancers perform onstage on the Avenue de Mayo in Buenos Aires, Argentina, Dec. 5, 2009 as the city celebrates its annual Dia del Tango (Tango Day) that draws citizens to dance in the open air. (Xinhua/Martin Zabala) Dancers perform onstage on the Avenue de Mayo in Buenos Aires, Argentina, Dec. 5, 2009 as the city celebrates its annual Dia del Tango (Tango Day) that draws citizens to dance in the open air. (Xinhua/Martin Zabala) Dancers perform onstage on the Avenue de Mayo in Buenos Aires, Argentina, Dec. 5, 2009 as the city celebrates its annual Dia del Tango (Tango Day) that draws citizens to dance in the open air. (Xinhua/Martin Zabala) Dancers perform onstage on the Avenue de Mayo in Buenos Aires, Argentina, Dec. 5, 2009 as the city celebrates its annual Dia del Tango (Tango Day) that draws citizens to dance in the open air. Sources: Xinhua
