The Pentagon's only maximum security prison, at the U.S. Army's Fort Leavenworth in Kansas, is one of the facilities being considered for placement of Guantanamo prisoners deemed too dangerous to release. Julie Denesha/Getty Images hide caption

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People wait for a train in the foreground as members of a police forensics team take part in an investigation next to a Thalys train on the platform at Arras train station, northern France on Saturday. Virginia Mayo/AP hide caption

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This photo provided by the U.S. Government, presented during a trial, shows a photo of Irek Hamidullin surrendering after being wounded by U.S. forces in Afghanistan on Nov. 29, 2009. AP hide caption

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A man in Nairobi, Kenya, stands in front of a mural of President Obama, created by the Kenyan graffiti artist Bankslave, ahead of Obama's trip to Kenya and Ethiopia. Ben Curtis/AP hide caption

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Courtesy of Corinne Purtill and Mark Oltmanns

President Obama meets Cuban President Raul Castro at the Summit of the Americas in Panama City on April 11. The White House says it wants to remove Cuba from its list of state sponsors of terrorism. Pablo Martinez Monsivais/AP hide caption

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Two teams face off in a debate over the extent of the president's war powers at the latest debate from Intelligence Squared U.S. Samuel LaHoz/Intelligence Squared U.S. hide caption

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Students gather at a distance from the Garissa University College after an attack by gunmen in Garissa, Kenya, Thursday. The attack has injured dozens of people; a siege is ongoing. AP hide caption

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