we prevent attacks like this in the future? >> i am not concerned aboutal te investigation. they will get a lot of information about him. his network, where he is coming from. i am concerned about the fact that we were not able to a detet him and therefore vetting him before. the real battle is going to be the vetting system. >> tucker: but with the scale of our immigration in this country, how could you possibly vet all of those people? >> you have a problem of immigration that we need to respond to, regardless of terrorism. then you have a problem of terrorism connecting to these loopholes inside that immigration system. we need to be smart, making sure that we have a government ability to detect on the one hand, and disconnects that threat from the windows they are using to get into the space. >> tucker: this attack seems like it could have been far worse. why wasn't it? >> yes, it absolutely could have been far worse because he made it to that place with a bomb on his body.be more than likely there are two scenarios here on why it didn't work well. b