the exception being john walker linde. i think the way we dealt with it after 9/11 was very problematic with regard to communication management units. i think we created an echo chamber where we assumed communication would not occur. >> explain in more detail what these units are. >> communication management units are isolated units fortha these units are.>> they are isolated units with people that have i guess, extremist affiliation. not just jihadists but sometimes environmentally, but predominantly, jihadist. so, there are many examples where, they are supposed to be essentially monitored in these cases but somehow or some way that's clearly not the case.>> why is that? what the theory of this case ?>> the idea is that if you were to put them in the federal prison system, one radical individual could rival a guys -- could radicalize the entire population. this is problematic because, these individuals, or those who are in communication management have probably, let's say, a sentence of seven years. that you are embedded