The Paris attacks have brought new attention to Dimitri Bontinck, a member of Belgium's Dutch-speaking majority. His life was dramatically changed a few years ago, when his then-teenage son converted to Islam and went to Syria to join Islamist fighters there.
Now Bontick is trying to prevent other young Europeans from following the same path.
Bontinck says his son, Jejoen, was raised as a typical Western boy, the child of an atheist father and a Catholic mother.