In this May 14, 2009, file photo, reviewed by the U.S. military, Guantanamo detainees pray before dawn near a fence of razor-wire, inside Camp 4 detention facility at Guantanamo Bay U.S. Naval Base, Cuba. Ten prisoners from Yemen who were held at Guantanamo Bay, have been released and sent to the Middle Eastern nation of Oman for resettlement, U.S. Secretary of State Ash Carter said Thursday, Jan. 14, 2015. (AP Photo/Brennan Linsley, File)
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