North Atlantic Treaty Organization (Nato)

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U.S. Secretary of Defense Leon E. Panetta (left) shakes hands with Australian Defense Minister Stephen Smith (right) as U.S. Ambassador to NATO Ivo Daalder (second from left) and NATO Secretary-General Anders Fogh Rasmussen look on during a round-table meeting of NATO defense ministers at the alliance's headquarters in Brussels on Wednesday, Oct. 10, 2012. (AP Photo/Virginia Mayo)

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Police secure the site of a suicide bombing in Khost, Afghanistan, on Monday, Oct. 1, 2012, after a bomber drove a motorcycle packed with explosives into a patrol of Afghan and international forces, killing more than a dozen people, including three NATO service members and their translator, officials said. (AP Photo/Nashanuddin Khan)

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**FILE** U.S. Defense Secretary Leon Panetta (center) speaks June 7, 2012, with Ryan Crocker, U.S. Ambassador to Afghanistan, and Gen. John Allen (left center), the head of NATO coalition forces in Afghanistan, upon arriving at Kabul International Airport in Kabul, Afghanistan. (Associated Press)

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The French flag is lowered during a ceremony to transfer authority from French soldiers, who are part of NATO's forces, to Afghan security forces in Surobi, Afghanistan, east of Kabul, on Tuesday, July 31, 2012. (AP Photo/Musadeq Sadeq)

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**FILE** Afghan security forces raise Afghanistan's flag in place of NATO's flag on July 18, 2012, during the third phase of transfer of authority from NATO troops to Afghan security forces in Kandahar, Afghanistan. (Associated Press)

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** FILE ** Hafiz Saeed (center), leader of Pakistani religious group Jamaat-ud-Dawa, is surrounded by guards as he arrives July 8, 2012, in Lahore, Pakistan, to attend a rally condemning the movement of NATO supplies to Afghanistan through Pakistan. (Associated Press)

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A driver washes his face July 5, 2012, near a truck carrying NATO supplies at the Pakistani-Afghan border in Chaman, Pakistan. The first truck carrying supplies to American and NATO troops in Afghanistan has crossed the Pakistani border after a seven-month long closure of the supply routes by Pakistan ended earlier in the week. (Associated Press)

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A man Wednesday stands on a truck carrying NATO vehicles in Chaman, Pakistan, near the Afghan border. Pakistan on Tuesday decided to end a seven-month blockade of NATO troop supplies in a rare bright spot in relations with the United States. (Associated Press)