4 years on: Iraq children pay toll

Four years after the U.S.-led invasion of Iraq, the toll of war can be seen on the faces of the country's children. Hundreds of thousands no longer attend school. Many are forced to deal with mass displacement and killings of loved ones.

Some are so shaken by the war, health experts say, they suffer from seizures and other mental health problems. "They killed my father and uncle in front of my eyes," one boy wept.

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