A Syrian soldier walks through the hotly contested city of Qusair on May 22. The Syrian army, backed by Lebanon's Hezbollah militia, has been waging a fierce fight with rebels in the key western city for the past two weeks. STR/STR/AFP/Getty Images hide caption

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Um Ahmed, her husband, Abu Ahmed, and their two children sit inside a United Nations refugee registration center in Tripoli, Lebanon. They fled the northern Syrian city of Aleppo a month ago. "There was a lot of shelling," said Um Ahmed. "I wasn't thinking. I was just thinking of my children." Nicole Beemsterboer/NPR hide caption

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