Of all the challenges the U.S. faces as it winds down the Afghanistan war, the most difficult might be closing the prison nicknamed "The Second Guantanamo."
The United States holds 67 non-Afghan prisoners there, including some described as hardened al-Qaida operatives seized from around the world in the months after the Sept. 11, 2001, terrorist attacks in the U.S. More than a decade later, they are still kept in the shadowy facility at Bagram Air Base outside Kabul.
Closing the facility presents many of the same problems the White House has encountered in its attempt to close down the Guantanamo Bay detention center in Cuba. Some U.S. officials argue that Bagram's resolution is even more complicated — and more urgent. The U.S. government transferred the prison's Afghan inmates to local authorities this year. But figuring out what to do with the foreign prisoners is proving to be an even bigger hurdle to shutting the American jail.