War_Conflict

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President Obama (right) shakes hands with Afghan President Hamid Karzai during their meeting at the NATO summit in Chicago on Sunday, May 20, 2012. (AP Photo/Pablo Martinez Monsivais)

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Demonstrators make their way through downtown Chicago to protest the NATO summit on Sunday, May 20, 2012. (AP Photo/Charles Rex Arbogast)

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NATO Secretary-General Anders Fogh Rasmussen speaks to the media before government leaders arrive at the NATO summit in Chicago on Sunday, May 20, 2012. (AP Photo/Carolyn Kaster)

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** FILE ** Afghan security men and NATO soldiers (right) are seen at the scene of an attack by militants in Kabul, Afghanistan, on Wednesday, May 2, 2012. (AP Photo/Musadeq Sadeq)

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Protesters block traffic on Michigan Avenue as they march through the city during a demonstration Friday, May 18, 2012, ahead of this weekends' NATO summit in Chicago. (AP Photo/Charles Rex Arbogast)

Margaret Nelson, center, from Evanston, Ill., joins about 100 anti-war activists as they march down Michigan Avenue after rallying outside President Barack Obama's campaign headquarters in downtown Chicago, protesting for an end to NATO operations in Afghanistan, Thursday, May 17, 2012, in Chicago. (AP Photo/Charles Rex Arbogast)

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The various stages of an annular solar, or "ring of fire," eclipse over Anuradhapura, Sri Lanka, are pictured on Jan. 15, 2010. (AP Photo/Eranga Jayawardena)

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Former Bosnian Serb military commander Gen. Ratko Mladic, center, a U.N. security guard, right, and member of his defense, left, are seen at the start of his trial at the Yugoslav war crimes tribunal in The Hague, Netherlands, Wednesday, May 16, 2012. (AP Photo/Toussaint Kluiters, Pool)

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** FILE ** NATO Secretary General Anders Fogh Rasmussen addresses the media at NATO headquarters in Brussels on Wednesday, April 18, 2012. The United States and its NATO allies are readying plans to pull away from the front lines in Afghanistan next year as President Barack Obama and fellow leaders try to show that the unpopular war is ending. (AP Photo/Virginia Mayo)

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A military aid holds the Medal of Honor for President Obama to award posthumously to Rose Mary Sabo-Brown, widow of Army Spc. Leslie H. Sabo Jr., on Wednesday. Sabo died protecting his comrades in Cambodia during the Vietnam War in 1970. (Associated Press)