A Syrian girl walks through an empty, ruined house in Raqqa earlier this month. Many civilians like her have no choice but to stay in the war-ravaged city despite the danger, either because they've been trapped by ISIS fighters or because they don't have the money to pay smugglers.
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Arabic signs have replaced Turkish ones in Istanbul's Fatih neighborhood, where many Syrian refugees have settled. Turkey has absorbed some 3 million Syrian refugees since the Syrian war began.
Syrians arriving last month from Jarablus, in Aleppo province, to their old neighborhood of al-Waer, in Homs, Syria. They left their homes to escape the government of Syrian President Bashar Assad, and now they are going back.
Carla Del Ponte, a former United Nations prosecutor and member of a U.N.-mandated commission of inquiry on the Syria conflict, at a 2013 press conference in Geneva.
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The Syrian city of Daraa, heavily hit by barrel bombs and other strikes by the Assad regime, is one of the areas covered by the current cease-fire. For the past eight days, residents have had a respite from the regime's attacks.
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President Trump and Russian President Vladimir Putin at the G-20 Summit on Friday. Shortly after they met, the United States said the two countries had agreed to a cease-fire in southwestern Syria.
Several people were killed and injured in a series of Damascus car bombings on Sunday. Two cars were intercepted on the airport road and detonated while a third made it to the city center. This photo was released by the official Syrian news agency SANA.
Hassan Youssef, a 40-year-old victim of the April 4 chemical attack in Khan Shaykun, receives medical care in a hospital in the nearby Syrian city of Idlib in April.
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Nurses give the oral polio vaccine to a Syrian child in a refugee camp in Turkey. The oral polio vaccine used throughout most of the developing world contains a form of the virus that has been weakened in the laboratory. But it's still a live virus.
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Mohammad Al Abdallah, the executive director of the Syria Justice and Accountability Centre, shows a video that was posted to YouTube of illegal cluster bombing in Syria.