Yazidi children pose for a photo in the Khanki camp, about 20 km northwest of the province of Dohuk, northern Iraq, Oct. 21, 2014.(Xinhua/Yaser Jawad).

Yazidi children play with toys in the Khanki camp, about 20 km northwest of the province of Dohuk, northern Iraq, Oct. 21, 2014.(Xinhua/Yaser Jawad).

A Yazidi boy plays with his toys in the Khanki camp, about 20 km northwest of the province of Dohuk, northern Iraq, Oct. 21, 2014.(Xinhua/Yaser Jawad).