War nightmares of Syrian children
The civil war in Syria is now into its fourth year and is thought to have claimed more than 150,000 lives.
Millions more have been displaced and many of them are living in refugee camps.
But those left behind in Syria are also suffering and none more so than the children caught up in the conflict.
The BBC's Chief International Correspondent, Lyse Doucet, has been to several cities across the country to meet some of them and sent this report.