Khalid bakraoui is shown here on the left. He carried out the bombing at the train station ab hour later. Both brothers had ties to the paris terror attacks. Authorities updated the death toll last hour too. It rises to 31 and the wounded rises to 271. Were covering all the angles to the investigation. Lets begin with cnns nima elbagir in brussels. That News Conference was pretty surprising last hour. It was. It really broke down the detail. Were only just past the 24 hour mark. So there is a lot of information we had bln hearing earlier that now appears authorities had initially presumed but turned out to be incorrect. So lets break this down for everybody. 7 59 a. M. Yesterday Police Believe when the first detonation happened. The first suicide bomber detonated. 37 seconds later the second bomb. Then the third man, the one they are currently seeking, he left a bomb to be remote detonated and that horrifyingly seems to have had the largest amount of explosive. This was the bomb that was intended to cause the most damage. Mercifully it didnt detonate. It was then detonated by authorities in a controlled explosion. While Ibrahim Bakraoui was detonating himself in the airport husband brother was moving towards the train station. And an hour later is when he detonated himself in the metro station. And identifying him is the key to link between the him and the paris attackers Salah Abdeslam. Last week the address that was raided Salah Abdeslams dna was found and he is placed there post the paris attack. Authorities believe that was represent rented by khalid bakraoui. Throughout this of Course Police are hunting for the third suspect. The man who left the bomb. The man whose picture we showed you the light color coat and hat. Hes believed to be extremely dangerous. And to give you sense of how much big they are possibly could have been, police said when they raided the apartment in schaerbeek yesterday, they found 15 kilos of explosive, nail, acetone. So much more that could have gone horribly wrong. They also found the last will of Ibrahim Bakraoui. In it he talks about feeling the need to hurry this operation, feeling unsafe. And that really brings into play the horrifying foreshadowing of authorities the sunday of capture of abdeslam when the foreign minister was speaking out saying his worry was that this capture while crucial is and so necessary could accelerate the networks that were plotting to strike here in brussels, carroll. So nima, that means abdeslam, the man responsible for the paris attacks, he knew of a plot and police could got net the information from him in time . Is that what it seems like to you . Well the authorities only started speaking publicly about a plot after Salah Abdeslam had been captured. And they do say hes been collaborating. So clearly the sense is that hes bringing together pieces of this puzzle and that is what the prosecutor said. But they also said at the time this is far from over. We still dont have as they characterized it, the complete puzzle. And that is sadly what led to the unfolding of the circumstances, the tragic incidents we saw here yesterday morning, carol. So the paris attacks and the brussels attacks appear to be connected. That means there was this cell operating within both countries. How big do authorities think this cell is . How many more people are they looking for . Authorities believe there is an overlap between these networks as you see with Salah Abdeslam and the bakraoui brothers. But they believe they are largers because they are two networks and this is really whats been really starting to hear authorities talk about. Almost this lattice work of islamist radical networks operating in europe. In brussels. And that Salah Abdeslam, while part of the paris attack conspiracy, while he was on the run had also been part of this other network that had built up around him they believe to be implicated in the brussels attacks of yesterday morning, carol. So other countries have been put on alert. So theres probably this massive man hunt in, i dont know, france . In germany too . Where are they looking . Well Authorities Say they are giving increased scrutiny across europe. Of course they are not giving out any details of exactly where they are raiding because they have been so cautious post paris about potentially putting that information out there that could allow any of these suspects to evade capture. But we do know that the French Police have deployed an extra 1600 officers onto the streets and other countries are looking careful at their borders. There is just this state now have hierp vigilance here in europe carol. At the same time here in brussels were actually overlooking just behind us here the memorial for those injured and those who lost their lives in the attack. People seem to be very consciously choosing to come out onto the streets in spite of the threat level. Some ive been speaking to just said we want to try and snatch back some normalcy from those who did this to us. Because if we stay at home, if we stay afraid then we feel that they will have won. One of the oddest turn of events this morning out the News Conference was one of the the brothers left a will but it was like part will and part suicide note, wasnt it . It definitely wasnt the kind of will that weve seen from militants before, especially isis has claimed responsibility for this. Authorities havent confirmed that but with isis there will tend to be very flashy and this is why we did this and you will suffer. This seemed to be like you say a tinge of regret. A fear. He speci he didnt want to en where Salah Abdeslam is. Authorities were combing the computer trying to see what else there is in there. It definitely gives you real an insight into his thinking. Thanks so much for your reporting. Lye from brussels this morning. I want to bring in Frederick Pleitgen now. Hes near the place where explosives were found earlier. What can you tell us . Reporter yeah where a lot of the things that were found that were talked about in that press conference that just tack place. Where is ever this is where the main raid took place yesterday. Were in front of this residential building and the top floor is where most of the raids took place last night. And we were there yesterday and there was a lot of forensic work being done. And we were wondering why there was an explosive ordinance crew there for a very long time. Several eod trucks were in front of this place. And there were some 15 kilograms of explosives they found inside that apartment. Also a lot of screws. They said yesterday they were talking about a nail bomb. Also one of the other things was the will that was found. Apparently it was found on a laptop computer in a garbage can right outside of this building. And turning aroundky actually see a garbage can outside the building where the computer may have been dump. The Authorities Say that is where they found that will where apparently one of the two brothers there said that he felt he was on the run and things were getting close and he was afraid of going to jail. So this certainly seems to be one of the focal points where at least most of the explosives for the terror attacks that happened here in brussels yesterday were manufactured. Where the lab to manufacture them was and also of course where the screws were put in and also an isis flag was found at this location as well carol. As for the materials they use to make these bombs, where did they come from . Reporter well that is a very good question. A lot of materials they used appear to be stuff you can basically buy in the pharmacy. You have to go of course probably to several different places. But it is essentially homemade explosives. And judging by the press conference that took place by the belgian prosecutor just a couple minutes ago, the definition for the explosive that was used, tatp, is the same kind of explosive that was also used in the paris attack. It is not necessarily something that is very easy to make but it is something that with the knowledge of how to make bombs is something that can be manufactured in somewhat of a homemade lab like this one was. Now remember this is also the place where these people were picked up to then go to the airport to conduct the bombings there. And the taxi driver who picked them up said first of all they had a lot of luggage with them. That some had to stay behind here. That might explain why a nail bomb was found here at this location. But also that when they goth the airport the man there were there refused to allow the taxi driver to handle their luggable and that seems to indicate obviously that something very unstable was inside that luggage and that of course could explain the tatp would have been inside those pieces of lunggage. So a lot of what authorities are telling us seems to originate here from this residential building in the schaerbeek area of brussels. And that tatp frederick mentioned is important and im going to get into that in a second. We still dont know who exactly police are arrested in part. But i want to talk now about najim laachraoui. I want to talk about laachraoui for a moment. Allegedly isiss chief bomb maker. One of the most wanted men in belgium. Days ago he was named as the new suspect in the terror attacks and they are also trying to figure if hes linked to the brussels attacks. We know he traveled to syria in 2013. And isis claimed responsibility for the bombings. And put out a statement. The big question, one of the Big Questions this morning, is isis in syria or iraq directly orchestrating these kind of terror attacks . Lets talk about that side of the story. Paul crook chang shaq is here. Paul. Some media has been reporting the man in the light coat that he was the bomb maker but apparently he is not. Who do you suppose he is . Well they dont know at this point carol. He was suspected to be the third suicide bomber at the airport with a large amount of explosives, tap explosives in his suitcase which he placed on the trolley. For some reason it didnt work or he backed out. And according to footage he runs away from the scene. The other two blow up their device. But the key new piece of information weve just received in the last hour or so is that the bakraoui brothers, one at the metro station, one at the airport, wented Salah Abdeslams safe house where he hit after the paris attacks. That definitively ties the paris attack cell and the brussels attack cell as part of the same network, same isis cell carried out both of these attacks. We are also learning from the federal prosecutor that one of the bakraoui brothers left a last will and testament which was found near that residence in schaerbeek which was searched yesterday, saying i dont want to go to prison. We need to speed this thing up. Senior belgian counterterrorism official tells me that Belgian Security services believe the cell accelerated their planning after abdeslams safe house was raided in brussels last week after Salah Abdeslam was brought into custody. They accelerated their plans. They did not want to be arrested. And therefore they carried out this very large attack. Now this is very important. They do not have specific evidence yet that Salah Abdeslam was going to be part of this attack. That played out yesterday in brussels. But Salah Abdeslam, part of the same cell as the attackers yesterday. You were referring to laachraoui who was still at large. This is an individual who played a key role in the paris tarbgs. He was on the phone in real time to various teams during the night of the attacks. Now his dna was found at the paris attacks bomb factory. But his dna has not yet been matched to the schaerbeek property which was raided yesterday which was the bomb factory for this attack. The fact that his dna at this location suggested he might have been the bomb maker. I think it is premature carol to call him isiss chief bomb maker. We dont know that for sure. But certainly he is a very skilled bomb maker and still at large. Belgium authorities very keen to arrest him. He may be the most dangerous man in europe right now. Okay. So all of these people are apparently connected though. And that is really the point. And i think that Many Americans are wondering, general, is isis in the form of albaghdadi directly ordering these kind of attacks . Because we know this bomb maker went to syria. We dont know who he talked to or anything but that is what Many Americans fear . Well i think there is a command and control element to all of this carol. But his terms of directly ordering it as to the details of the plot, the timing, the place, the location, no. He is not doing any of that. What you were talk about with nima before in these Large Networks throughout europe that have smaller cells placed all over the countries in europe, it is critically important to understand that there are some key and important people. There are leaders. There are the financer, there are the bomb makers. There are the communicators and then there are the pawns that carry out the attack. When it was reported that the man in the white trench coat, accompanying the two suicide bombers was the bomb maker yesterday, i shook my head and said no that is not the case. They would never send someone as important as the bomb maker on an attack. He is back considering ways to make new bombs and execute more missions. So that is the kind of things you have to concern yourself with. The various cells that are part of this network actg on their own at many times. They may have general guidance from the cells in syria or from the network in syria. But they are doing this on their own. Hence the letter that says hey weve got to do this right away because i dont want to spend time in jail with abdeslam. They wanted to execute these fast to make sure they werent caught up in this collection of individuals as the various Police Agencies in europe were conducting their operations. Up next the brussels attack front and center in the 2016 president ial election. Oh, look. Another antiwrinkle cream in no hurry to make anything happen. Neutrogena® rapid wrinkle repair works. In one week. With the. Fastest retinol formula available. Its clinically proven to work on fine lines and. Even deep wrinkles. One week . 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We give you your day back. What you do with it is up to you. Tylenol®. Well continue you to bring you the latest out of brussels. But first, Hillary Clinton continues to pull away from Bernie Sanders. Even as the vermont senator crushed his rival in idaho and utah. But in the arizona primary clinton gained the upperhand big time. As for donald trump, the road to the white house hit another hurdle as senator cruz wins big in utah. Trump posted a big win of his own in delegate rich arizona. But cruz says his victory has trump running scared. Citing this tweet from the gop front runner. Liein ted cruz just used a picture of melania in a goal kick shoot in his ad. And cruzzen responded, if your try to attack heidi you are a coward. More of a coward than i thought. Hashtag classless. Cruz talked about it on cnn this morning. Last night donald threatened my wife. He went directly after my wife. And i got to tell you that number one, heidi my wife is the daughter of missionaries in africa. Shes by best friend in the world. And if donald wants to get in a character fight hes better off sticking with me because heidi is way out of his league. All right. Joining me now to talk more about this and more mark preston, good morning. Good morning. We certainly have got into the gutter of american politics with donald trump and ted cruz. But lets talk about the numbers right now. The delegate tolds at this point. As you said there was a split. Donald trump picked up 58 delegates by winning the state of arizona. Ted cruz picked up 40 by winning the state of utah. Overall now you need 1,237 dlgts to win the republican nomination. Right now donald trump has 741, he is in the lead. Ted cruz has 461 delegates. Now carol, another big bit of news for ted cruz this morning. He received the endorsement of jeb bush, the former florida governor, bush as you recall left the race about thirty days ago because hoyis campaign was unable to pick up traction. He described ted cruz as the principled conservative. But listen this biting remark about trump. We must mo