Mazen (right), 13, and his brother Mezban in a camp for displaced Yazidis in the Kurdistan region of Iraq. Mazen was freed recently, five years after being kidnapped by ISIS. He was found in Baghouz, the last ISIS stronghold in Syria. His brother was also kidnapped and, 2-1/2 years ago, was rescued with their mother. The boys' father is still missing. (NPR)
