A young boy walks past a makeshift barricade made of wreckages of buses to obstruct the view of regime snipers and to keep people safe in the rebel-held side of the northern Syrian city of Aleppo. Syria's conflict entered its fifth year on March 15, 2015 with the regime emboldened by shifting international attention and a growing humanitarian crisis exacerbated by the rise of the Islamic State group. (Photo by Karam Al-Masri/AFP Photo)
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