Associated Press
Activists of the movement of landless rural workers (MST) waves Venezuelan flags in support of Venezuela's President Hugo Chavez during a Extraordinary Summit of the South American trading bloc, MERCOSUR, in Brasilia, Brazil, Tuesday, July 31, 2012. Venezuela was officially welcomed into the Mercosur trade bloc Tuesday, giving Chavez a long-awaited political prize and strengthening links among the region's agricultural and energy powerhouses. (AP Photo/Fabio Pozzebom)

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