Abdullah Kurdi, father of 3-year-old Aylan and his brother, Galip, age 5, whose drowned bodies both washed up on a Turkish beach. Mehmet Can Meral/AP hide caption

itoggle caption Mehmet Can Meral/AP

Washington Post Iranian-American journalist Jason Rezaian, seen here with his wife, Yeganeh Salehi, has been held prisoner since he was arrested in Tehran last July. On Thursday, a powerful Iranian politician said of a potential prisoner swap, "That's one way." EPA/Landov hide caption

itoggle caption EPA/Landov

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

An International Atomic Energy Agency inspector cuts a uranium enrichment connection at Iran's Natanz facility, 200 miles south of Tehran, in 2014. The U.S. Congress is expected to address the Iranian nuclear deal this month. One unresolved issue: How much work might Iran have done previously on weaponizing its program? Kazem Ghane/AP hide caption

itoggle caption Kazem Ghane/AP