When Rosa, now 14, asked her Islamic State captors about her younger sisters, Bushra, 12, and Suhayla, 7, she was told they had been killed for misbehaving.
"At that point, I didn't care about anything anymore. Even if I died," she said. "I never thought I'd see them again."
The sisters were finally reunited on Sunday, more than three years after being taken by the militants in an assault on Sinjar, the Yazidi heartland, on Aug. 3, 2014.