but after that -- >> tara palmeri there from politico europe at brussels airport. , thank you very much. >> sam, i took the subway here this morning in london, and everyone is reading about this on their phones. there is no extra sign of security. but i am sure that the ramifications of what's happened in brussels today will be felt here in london by the end of the day. and i understand they're already ramping up security in new york as well. >> yeah. and news coming in that president obama has been briefed on the situation and that his administration is in touch with belgian counterparts even while in havana. i have a question forame ayman. we're being told on one hand that it's a sophisticated, planned attack, something that's been in the works for a while. on the other hand the timing is not suspicious, it's clear that it happened a few days after salah abdeslam's arrest. it seems retaliatory in that respect. ho you do you square those two things? >> i would say look at it from a few different perspectives. you could say that this is not sophisticated in the sens

. >> tara palmeri from politico, thank you for coming back. i appreciate. >>> earlier i spoke to a european security expert claude monique about the sophistication of tuesday's attack and the importance of the bombmaker. the bombmaker both from paris also tied to the brussels attacks. you protect the bomber because he's highly trained and you can always fine people who will go and kill themselves. you can't find people with that type of skill. i've been told by some' people the bombmakers aren't that importa important. >> you can find it on the internet with a degree in chemical engineering and find thinking, actually, you will just blow up yourself because it's a very unstable environment. you have to know exactly how to mix it. that will take weeks. and after you use it, to know exactly the effects. >> so they are not teaching themselves in their basement. they are going to syria. >> it's important to log this on the computer and try this in your basement. you have to be trained in a special specificity by special people in explosives. >> wh

more on the reaction in belgium a day after the attacks, let's bring in politico europe reporter tara palmeri. she's joining us live from brussels. i think we had to phone her yesterday. we can actually see you today. good morning. >> reporter: morning. i'm standing in front of a makeshift vigil where there is actually a lot of movement, but in the rest of the city, it's pretty quiet today. european officials have been told not to go to work. european parliament shut down. we're still at level four terror alert. the belgian officials have learned there are deep ties between salah abdeslam, the paris attacker, and the two el bakraoui brothers. they're all of moroccan descent. they all had close contact in their hub, which is molenbeek. so definitely some correlation in planning the attack. >> tara, thank you, once again for your report. we have ambassador burns here so we're going to move on. we appreciate it. thank you. as i said, for more reaction in the attack, former u.s. ambassador to nato as well as an undersecretary of state. he's currently a professor at the harvard kennedy school of g