radicalized from coming into the united states talked about intelligence sharing and we know there are failures there in the past and also talked about changing some of the visa statutes that are in place right now to make vetting much more rigorous, much manufacture challenging to try and weed out those who may be looking to come here with bad intent. the fbi, we've not been able to identify people radicalized here in the united states with efforts and capabilities of u.s. law enforcement. i don't know how we're going to be able to do that just in coordination with foreign partners. certainly there will be some opportunities but that is not going to be traide and true. >> you argued how tough it is to find these types of individuals radicalized bringing up the point many are in their mid 20s, well-educated and given that, so what do you look for as an investigator? what clues? >> until we find a machine to