Dalaa al-Aydi, 4, and her family left Syria just before the start of the civil war. Her only memory of Damascus is, "Takh, takh," the sounds she makes mimicking the gunfire. Holly Pickett for NPR hide caption

itoggle caption Holly Pickett for NPR

A Turkish paramilitary police officer carries the body of 3-year-old Aylan Kurdi, found washed ashore near the Turkish resort of Bodrum early Wednesday. The boats carrying the boy's family to the Greek island of Kos capsized. His 5-year-old brother and mother also lost their lives. DHA/AP hide caption

itoggle caption DHA/AP

Inspektor Jan Gieber of Austrian police shows the inside of the large van outside the police station in Braunau, Upper Austria, on Sunday, where the children were found among 26 migrants trying to reach Europe. Daniel Scharinger/EPA/Landov hide caption

itoggle caption Daniel Scharinger/EPA/Landov

Migrants from Africa receive instruction in French in the port city of Calais. Some 3,000 migrants live in a makeshift camp known as "The Jungle." Most are seeking to travel on to Britain, while some are seeking asylum in France. Ari Shapiro/NPR hide caption

itoggle caption Ari Shapiro/NPR

Migrants queue to continue their journey north at a newly built registration and transit center near Gevgelija, Macedonia, on Sunday. More than 5,000 migrants crossed into Serbia on Sunday, resuming a journey to western Europe after an overwhelmed Macedonia gave up its attempts to stem the flow of mainly Syrian refugees by force. Ognen Teofilovski/Reuters/Landov hide caption

itoggle caption Ognen Teofilovski/Reuters/Landov

People wait for a train in the foreground as members of a police forensics team take part in an investigation next to a Thalys train on the platform at Arras train station, northern France on Saturday. Virginia Mayo/AP hide caption

itoggle caption Virginia Mayo/AP

Members of the Syrian band Khebez Dawle include (from left to right) Hekmat Qassar on guitar and keyboards, lead guitarist Bashar Darwish, bassist Muhammad Bazz and lead singer Anas Maghrebi. Half the band members are now in Turkey, and are strongly considering seeking asylum in Europe. Courtesy of the artist hide caption

itoggle caption Courtesy of the artist

Lucie Morillon, head of research at French watchdog of Reporters Sans Frontieres (Reporters without Borders) holds a banner depicting Syrian human rights activist Mazen Darwish during a protest against violence in Syria, in Paris, Saturday, Oct. 20, 2012. Darwish was released from a Syrian prison Monday. Francois Mori/AP hide caption

itoggle caption Francois Mori/AP

Kurdish rebels in northern Syria walk near the devastated town of Kobani last November. The U.S. bombing campaign helped the Kurds push back the Islamic State from the area. But overall, the U.S. operation against ISIS in Iraq and Syria has shown only limited gains in the past year. Jake Simkin/AP hide caption

itoggle caption Jake Simkin/AP

A fighter with Jabhat al-Nusra, the al-Qaida affiliate in Syria, takes down a picture of Syria's President Bashar Assad in the northwestern city of Ariha in May. Jabhat al-Nusra is strong in this area, and recently captured Syrian fighters trained by the U.S. Ammar Abdullah/Reuters/Landov hide caption

itoggle caption Ammar Abdullah/Reuters/Landov

Flags of member nations wave outside NATO headquarters in Brussels. For just the fifth time in its 66-year history, NATO ambassadors met in an emergency, Article 4 session to gauge the threat that the so-called Islamic State poses to Turkey. Geert Vanden Wijngaert/AP hide caption

itoggle caption Geert Vanden Wijngaert/AP

Syrian President Bashar Assad speaks during his meeting with the heads and members of public organizations and professional associations in Damascus, on Sunday. Assad acknowledged that the fight against rebels had suffered setbacks, but vowed to win against insurgents. SANA/Reuters/Landov hide caption

itoggle caption SANA/Reuters/Landov

Civil defense workers wear gas masks near damaged ground in a village near the Syrian city of Idlib in May. Activists said there had been a chlorine attack. Abed Kontar/Reuters/Landov hide caption

itoggle caption Abed Kontar/Reuters/Landov

A U.S. Air Force plane takes off as a Turkish air force fighter jet taxis at the Incirlik airbase, southern Turkey, in 2013. Reversing an earlier policy, Ankara has agreed to allow the U.S.-led coalition to fly anti-ISIS airstrikes from the base. Vadim Ghirda/AP hide caption

itoggle caption Vadim Ghirda/AP

"What we are doing now has nothing to do with what we expected to be doing," says Rami Jarrah, who protested against the Assad regime in Damascus in 2011 and now runs a radio station from southern Turkey that broadcasts to civilians in rebel-controlled territory in northern Syria. Alison Meuse/NPR hide caption

itoggle caption Alison Meuse/NPR

Saeed al-Batal, a Syrian photographer, posted this image from Douma, Syria, on his Facebook page on March 31. Courtesy of Saeed al-Batal hide caption

itoggle caption Courtesy of Saeed al-Batal