What draws young men to extremist groups? The issue has been thrown into the spotlight by the advance of ISIS in Iraq, who've drawn on foreign recruits, but many countries have battled the problem for years. In this report, we hear from men who've been drawn to radical groups - and what some people are doing to dissuade them. But first, Owen Bennett-Jones speaks to Rehman Malik, the former interior minister of Pakistan. He was the public face of his government's struggle with the Pakistani Taliban - does he know how many foreign fighters are in Pakistan?
(Photo: A video released by ISIS purportedly showing British recruits of the militant group)