. >>> nbc news analyst sean henry, the former executive assistant director of the fbi joins us now. the investigators now, law enforcement now in brussels and belgium at large have two major jobs. one, they have to try to prevent anything further from happening. two, they've got to begin the investigation as to how this happened. where do they begin? >> both of those things are really kind of locked together. as they continue this investigation, they're going to be developing intelligence of who might have been involved. they're coming on the backside of what happened with abdeslam. the intelligence they're collecting from that. absolutely, the top priority will be preventing any further attacks. again, matt, it really starts with identifying who these cohorts are here, what they're pulling out of their ongoing investigation. there have been hundreds of searches. there have been dozens of arrests in the weeks preceding this. there's a lot of intelligence there that investigators will be combing through to try to put the pieces of the puzzle together. >> when you see the images, sean

. >>> nbc news analyst sean henry, the former executive assistant director of the fbi joins us now. the investigators now, law enforcement now in brussels and belgium at large have two major jobs. one, they have to try to prevent anything further from happening. two, they've got to begin the investigation as to how this happened. where do they begin? >> both of those things are really kind of locked together. as they continue this investigation, they're going to be developing intelligence of who might have been involved. they're coming on the backside of what happened with abdeslam. collecting from that. absolutely, the top priority will be preventing any further attacks. again, matt, it really starts with identifying who these cohorts are here, what they're pulling out of their ongoing investigation. there have been hundreds of searches. there have been dozens of arrests in the weeks preceding this. there's a lot of intelligence there that investigators will be combing through to try to put the pieces of the puzzle together. >> when you see the images, sean, especially those images

as we turn to sean henry who is our nbc terrorism analyst and former leader in the fbi, i wonder what your thoughts are this morning, sean as you look at the scope of the damage. i'm struck by the departure's lounge. your eye is more expert. when you see the carnage there and windows blown out, do you come to any conclusions about the force that might be necessary or involved here? >> yeah. clearly it looks as if this was a powerful explosive device. i have been to that airport before and it's a typical airport like you would see anywhere throughout the united states. you don't have security until you get to the gate area where you're about to go through the gate but then you have all the folks congregated in that area. you have people getting food and there's a large mass of folks in that airport without security until you get to the gate area prior to the departure. >> can you lend a little insight into whether you think that something like this, proexplosions at an airport followed closely by one, perhaps more explosions in the metro system in brussels could have been pulled togeth

as we turn to sean henry who is our nbc terrorism analyst and former leader in the fbi, i wonder what your thoughts are this morning, sean as you look at the scope of the lounge. your eye is more expert. when you see the carnage there and windows blown out, do you come to any conclusions about the force that might be necessary or involved here? >> yeah. clearly it looks as if this was a powerful explosive device. i have been to that airport before and it's a typical airport like you would see anywhere throughout the united states. you don't have security until you get to the gate area where you're about to go through the gate but then you have all the folks congregated in that area. you have people getting food and coffee and what have you so there's a large mass of folks in that airport without security until you get to the gate area prior to the departure. >> can you lend a little insight into whether you think that something like this, proexplosions at an airport followed closely by one, perhaps more explosions in system in brussels could have been pulled together quickly. does thi

i was talking with sean henry a former fbi agent here in our office this this morning who raised an interesting point that we should lay out there. the concern right now among u.s. law enforcement is not necessarily that this particular set of plotters in belgium has contacts here in the united states and could spread that. the concern is more that there could be self-radicalized individuals who are inspired by today's activity in belgium and might seek to do their own attacks of their own volition and that's really the insidious thing about isis and the terror threat we're facing you could have situations where people simply decide to do this on their own without any contact, without any kind of command and control element of isis itself. that makes it very difficult for u.s. law enforcement to respond. we're seeing stepped up security in new york and we're just getting word now from nbc news that metro system here in washington, d.c. is saying there will be stepped up security patrols, additional k-9 units, more officers walking the beat on the metro. having driven through downtown washington

henry. do they fear him? >> reporter: well, sean, at least publicly they insist they don't and i think when's going on here with the comment you saw there, a series of comments, a strategy of hillary clinton. looking past bernie sanders. he won four states on super tuesday, out-raised here in the month of february and another $12 million beyond what she raised in february. he is not going away. hillary clinton wants to look past him attacking donald trump instead. secondly, she's having an enthusiasm problem, an energy problem and so that's why she wants to pit herself against donald trump. go after some of his incendiary comments and basically say, look, i'll restore sanity here. that's about her trying to juice democratic turnout and enthusiasm. but as you say, there are some democrats warning the clinton campaign may be a mistake for them to take donald trump lightly. look at mudcat sanders, used to advise jim webb and said today i think trump could beat her like a tied-up billy goat. there are many areas that look like sherman w

henry mc million. tara mc pope. >> guys are ready to help out. we're going to wake up. >> we're the hornacek sean>> okay, let's go. >> we are following you. >> let's go in. >> (horns blowing). >> hey! wake up! how are you doing? >> how are you doing? wake on up. >> how are you doing? >> how are you doing? >> huh? >> has this ever happened? >> your mom says you don't wake up in the morning. your mom says you don't wake up in the morning. we came here to wake you up. sigh high to everybody. >> ya. >> that's the way to wake you up. >> you want us to wake you up. we'll wake you up. >> hey, hey, you waking up? >> back to you guys in the studio. >> i don't know why i like that? oh, man. >> okay. could you be arrested or could your children be arrested for using a emojis? you think i'm nuts now, right? well, i probably a.m. but 12 year old girl in big trouble for texting emojis. finds out which emojis police said were threatening. she could be fined or put on probation. hey, here's jen. free me. >> mike, you are going to love this. ann is getting ready to go in, we are at a cro spa in southampton bucks