Uruguay Mercosur Summit

  Brazil's President Dilma Rousseff waves before the Mercosur summit in Montevideo, Uruguay,Tuesday, Dec. 20, 2011. Mercosur is a regional trade block formed by Argentina, Uruguay, Paraguay, Brazil. The block has Bolivia, Chile, Colombia, Ecuador, Perú and Venezuela as associated states. (AP Photo/Matilde Campodonico)
Brazil's President Dilma Rousseff waves before the Mercosur summit in Montevideo, Uruguay,Tuesday, Dec. 20, 2011. Mercosur is a regional trade block formed by Argentina, Uruguay, Paraguay, Brazil. The block has Bolivia, Chile, Colombia, Ecuador, Perú and Venezuela as associated states. (AP Photo/Matilde Campodonico)

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