A U.S. Border Patrol officer keeps watch over the fence that divides the U.S. from Mexico in the town of Nogales, Ariz., on April 22. Mexico has denounced a newly passed Arizona law that requires police to question suspected illegal immigrants and orders people to carry proof of their immigration status. Mark Ralston/AFP/Getty Images hide caption

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Venezuelan President Hugo Chavez salutes during an April 13 ceremony in Caracas to commemorate the eighth anniversary of the failed coup d'etat against him. The recent arrest of a judge has raised questions about Chavez's tactics quelling dissent. Juan Barreto/AFP/Getty Images hide caption

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Children relocated from the Petionville Club camp in Port-au-Prince, Haiti, walk through their new home at a government resettlement camp in Corail-Cesselesse. Petionville residents are being moved to the new camp because of the risk of flooding and landslides at the current location during the coming rainy season. Lee Celano/Getty Images hide caption

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Cuban blogger Yoani Sanchez teaches students in her Blogger Academy how to use Twitter and other digital media tools. Nick Miroff for NPR hide caption

itoggle caption Nick Miroff for NPR