your host, melinda crane. melinda: hello and welcome to "quadriga." is the rhetoric of war suitable and useful or counterproductive? that is one of the questions we want to talk about today on "quadriga" with three people who are following the incidents in france and their aftermath very closely. it is a pleasure to welcome ulrike guerot. she is a political analyst and the founder and director of the think tank european democracy lab. she lived for many years in paris and has family there. she says the decisive question is do we defend our values or our security. and very glad to have asiem el difraoui on the show. he is a german /egyptian expert on islamism. who is working with the can dade -- candid think tank based here in berlin. he is currently living in france, and he says the fight against i.s. cannot be fought solely with military resources. and finally, great to have alan posener back on the show. he is a british-born commentator for the british newspaper "die welt." he says of course it is war and it has been since the fatwa issued against s

let's go now to melinda crane who is following this story for us. what can you tell us about this operation? >> it is an ongoing police operation using swat teams and special forces. to further people have been arrested, which we bring the total threat the course of the day to seven people. the first three were arrested this morning around 9:30 a.m. this was after a tipoff. apparently came from a saleswoman and a local discount store. she believes she had recognized the man who is the brother of one of the suicide bomber sprung saturday's attacks in paris. he is thought to have driven the getaway car. he is known to have alluded a seven -- assemblies who work looking for suspects in france. the region we are talking about in germany is close to the belgian border. it has been a region where there has been heightened police scrutiny. three people arrested this morning outside of an employment center after this tipoff came. police later told german media that he was not alone the three. there was a man amongst them, but we were told by german media th