William Potts, an American accused of hijacking a Florida-bound flight and diverting it to Cuba in 1984, arrives at FBI headquarters after arriving Wednesday. Potts will make an initial court appearance today. Joe Raedle/Getty Images hide caption

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A woman displays Cuban pesos, or CUP (right) and the more valuable convertible pesos, or CUC (left), in Havana Tuesday. Raul Castro's government announced that it will begin unifying the two currencies. AFP/AFP/Getty Images hide caption

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Cuba is sending thousands of badly needed doctors to Brazil, but Brazil's medical establishment has sought to block the program. Here, Cuban Dr. Yocelin Macias treats a patient in the capital Brasilia on Aug. 30. Eraldo Peres/AP hide caption

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Cuban baseball players have been defecting to the U.S. in growing numbers over the past two decades. Increasingly, smugglers play a role in getting the players off the island, U.S. baseball agents say. Gerry Broome/AP hide caption

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Former National Security Agency contractor Edward Snowden, who spilled secrets about the NSA's surveillance programs, has been condemned by U.S. officials. But he's been praised by some people around the world. In Berlin this week, supporters carried his picture at a demonstration. Ole Spata /DPA /LANDOV hide caption

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A handout picture made available Friday by the Venezuelan Ministry of Communications and Information shows Venezuelan President Hugo Chavez and his daughters Rosa Virginia (right) and Maria Gabriela reading an edition of Cuban daily Granma, as he recovers from cancer surgery. It was reportedly taken on Thursday. EPA /LANDOV hide caption

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Luis La Rosa, left, and Harry Henry on one of their last days at work on the U.S. Naval Station Base in Guantanamo Bay, Cuba. Suzette Laboy/AP hide caption

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Cuba has relaxed some business rules, allowing street vendors to sell produce and a large wholesale produce market to open at night on the edge of Havana. Greg Kahn/Getty Images hide caption

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