North Atlantic Treaty Organization (Nato)

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** FILE ** Pakistani protesters burn representations of U.S. and NATO flags during a demonstration on Monday, June 4, 2012, in Multan, Pakistan, to condemn U.S. drone strikes in the tribal areas. (AP Photo/Khalid Tanveer)

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The flags of NATO member countries fly outside the alliance's headquarters in Brussels in June 2007. (AP Photo/Virginia Mayo)

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Afghan soldiers at the Chinari outpost and elsewhere in Afghanistan are limited by a lack of equipment needed to do their jobs, yet they say they aren't afraid of the Taliban and expect the fighting to stop once U.S. and NATO forces leave in 2014. Most of the soldiers say they enlisted because they love their country and because the $250 monthly salary offers a way out of poverty. (Associated Press)

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Villagers gather at a house destroyed in an apparent NATO raid in Logar province, south of Kabul, Afghanistan, on Wednesday, June 6, 2012. Afghan officials and residents say the airstrike, aimed at militants, killed civilians celebrating a wedding, including women and children. (AP Photo/Ihsanullah Majroh)

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In this Wednesday, June 6, 2012, photo, a Pakistani man cleans the roof of an oil tanker that was used to transport NATO fuel supplies to Afghanistan, and parked with other tankers in a compound in Karachi, Pakistan. (AP Photo/Fareed Khan)

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U.S. Defense Secretary Leon Panetta, center right, speaks with U.S. Ambassador to Afghanistan Ryan Crocker, second right, and the head of NATO coalition forces in Afghanistan Gen. John Allen, center left, upon his arrival at Kabul International Airport in Kabul, Afghanistan Thursday, June 7, 2012. (AP Photo/Jim Watson, Pool)

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Villagers gather at a house destroyed in an apparent NATO raid in Logar province, south of Kabul, Afghanistan. Afghan officials and residents say a pre-dawn NATO airstrike aimed at militants in eastern Afghanistan killed civilians celebrating a wedding, including women and children. (Associated Press)

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** FILE ** Chicago police Superintendent Garry McCarthy (left) poses for a photo after protesters marched to President Obama's campaign headquarters in Chicago on Monday, May 21, 2012, the final day of the NATO summit. (AP Photo/Charles Rex Arbogast)

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From left, President Barack Obama, NATO Secretary General Anders Fogh Rasmussen, Afghan President Hamid Karzai, Azerbaijani President Ilham Aliyev and Pakistani President Asif Ali Zardari talk during a family picture of NATO leaders at the NATO Summit in Chicago, Monday, May 21, 2012. (AP Photo/Philippe Wojazer, Pool)