-led coalition, and the attacks, pash of a concerted campaign to depolarize europe. so they hope that the destabilization can radicalize europe's muslim population. it has one of the largest foreign fighter populations and isis has a significant supporter population. >> of young people who have left belgium. >> who have left and gone back, like the mastermind of the paris attacks. who have left and come back several times. >> that's a problem, and it's a problem in this country, and clearly a problem in europe. what do you do, do you think with these populations of particularly young people who feel themselves isolated and ostracized from their cultures? >> i think that there's more than one dimension to this. obviously, the caliphate, and the schol list has brought the campaign to the caliphate and now the caliphate has demonstrated that it can defend itself and defend itself beyond its borders, and the second dimension, from the caliphate, you have the capability there, and export that back to wherever you can find a location, you know, foreign operating cell. and o