How France is struggling with those radicalised by Islamic State

European countries are still struggling with the challenge of how to deal with citizens who travelled to join extremist Islamic State fighters in Syria and Iraq.

Like France, which had the most people travelling to join the jihadis and is now facing the problem of those who’ve already returned: how to punish, deradicalise and stop online grooming happening in the future.

And in the wake of the 2015 terror attacks, which killed more than 140 people, it’s a highly divisive issue for the French, as we have been finding out.