Cuban President Fidel Castro replies to President Kennedy's naval blockade via Cuban radio and television on October 23, 1962. Kennedy enacted the blockade in response to the deployment of Soviet nuclear weapons in Cuba. AP hide caption

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Students use a laptop at the Jose Maria public school in a shantytown on the outskirts of Lima, Peru on June 8. Peru has sent more than 800,000 laptop computers to children across the country, one of the world's most ambitious efforts to leverage digital technology in the fight against poverty. Five years into the program, there are doubts about its success. Karel Navarro/AP hide caption

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President Hugo Chavez waves a Venezuelan flag as he greets supporters at the Miraflores presidential palace balcony in Caracas on Sunday. Chavez won re-election and a new endorsement of his socialist project Sunday, surviving his closest race yet after a bitter campaign against opposition candidate Henrique Capriles. Fernando Llano/AP hide caption

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A picture of Venezuelan President Hugo Chavez was on display this week at a state-run market that provides subsidized food and basic goods in Caracas. Eitan Abramovich/AFP/Getty Images hide caption

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Marijuana grower and activist Juan Vaz checks a marijuana plant in the Uruguayan capital, Montevideo, in August. Uruguay's government has sent a bill to Congress that would allow the state to grow and sell marijuana. Andres Stapff/Reuters/Landov hide caption

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Transsexuals Maiamar Abrodos (right) and Maria Laura Aleman arrive at the civil registry to begin the legal process to change their genders in Buenos Aires, Argentina, in June. Natacha Pisarenko/AP hide caption

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