His step-father took him to Syria in 2014. His ordeal had just begun.

At its height, ISIS recruited and trained children to fight for its cause. Some participated in atrocities and appeared in propaganda videos. Others were brought to the so-called caliphate by their parents or they were born there. The World's Shirin Jaafari visits a rehabilitation center in northeastern Syria and brings us the story of one young man from Trinidad who has been stuck there for 5 1/2 years.