As France marked the third anniversary of deadly terrorist attacks in Paris, an international nonprofit organization launched a guide to help teachers, social workers and others to detect early warning signs of potential Islamic radicalization among young people. Among key things to watch out for, it says, are the expression of sentiments condemning Western society, or rejecting mixed-gender activities. Radicalization of those in the 16-18 age bracket is of particular concern, as they are seen to be especially vulnerable. The guide, which will be available for free in France in the coming weeks, is a project of the Counter Extremism Project (CEP), a group that fights extremist ideologies, with offices in New York and London. Foreign ministry advisor Muriel Domenach, who has also worked on the guide, said one of its main aims is to detect in advance any risk of radicalization among French youth. “We have to work on prevention of radicalization and we set up a chain of intervention at all levels to fight it among young people,” she said.