Brazil's President Dilma Rousseff, left, Colombia's President Juan Manuel Santos, center, and U.S. President Barack Obama participate in a three-way conversation at the CEO Summit of the Americas, in Cartagena, Colombia, Saturday April 14, 2012. Regional business leaders are meeting parallel to the sixth Summit of the Americas which brings together presidents and prime ministers from Canada, the Caribbean, Latin America and the U.S. Photo: Carolyn Kaster, Associated Press
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