A sketch by courtroom artist Janet Hamlin shows Omar Khadr (left) at a hearing with his defense team in the courthouse for the U.S. military war crimes commission at Guantanamo Bay. Janet Hamlin/Pool/AP hide caption
Detainees at Guantanamo Bay President Barack Obama has signed an executive order closing the prison that houses suspected terrorists picked up mostly on the battlefields of Afghanistan and Iraq. But closing Guantanamo is not as easy as freeing the prisoners and turning out the lights.

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