Afghanistan

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Jan Kubis, the top U.N. envoy in Afghanistan, presents the annual U.N. report on Afghan civilian casualties at a press conference in Kabul, Afghanistan, on Tuesday, Feb. 19, 2013. (AP Photo/Ahmad Jamshid)

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Afghan President Hamid Karzai addresses military officers in Kabul, Afghanistan, on Saturday, Feb. 16, 2013. (AP Photo/Ahmad Jamshid)

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** FILE ** In this Dec. 24, 1998, photo, Muslim militant and al Qaeda leader Osama Bin Laden speaks to a selected group of reporters in mountains of Helmand province in southern Afghanistan. (AP Photo/Rahimullah Yousafzai)

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An Afghan vendor, right, sorts out vegetables as his father drinks tea in Kabul, Afghanistan, on Wednesday, Feb. 13, 2013. (AP Photo/Musadeq Sadeq)

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An Afghan searches channels to watch U.S. President Obama's State of Union address on a television news report in Kabul, Afghanistan, on Wednesday, Feb. 13, 2013. (AP Photo/Musadeq Sadeq)

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An Afghan man walks out of a prison following his early release from the Nangarhar prison in Jalalabad, east of Kabul, Afghanistan on Tuesday, Feb. 12, 2013. Around 20 Afghan prisoners were ordered to be released by decree of Afghan President Hamid Karzai to mark the birthday of Islam's Prophet Mohammed. (AP Photo/Rahmat Gul)

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U.S. Marine Gen. Joseph F. Dunford (right) shakes hands with U.S. Marine Gen. John Allen (left), the outgoing NATO commander, during a change-of-command ceremony at the International Security Assistance Force headquarters in Kabul, Afghanistan, on Sunday, Feb. 10, 2013. Gen. Dunford takes charge at a critical time for President Obama and the military as foreign combat forces prepare to withdraw from Afghanistan by the end of 2014. (AP Photo/Massoud Hossaini, Pool)

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Afghan boys warm their hands over a brick-factory fire during a cold day on the outskirts of Jalalabad, Afghanistan, east of Kabul, on Monday, Feb. 4, 2013. Kabul has been experiencing below-freezing weather and snow for several days. (AP Photo/Rahmat Gul)