Welcome to the lead. Im john berman in for jake today. Breaking news in our world lead. A Major Development in the brussels terror attacks. The man suspected of building the bombs that tore through paris in november and brussels yesterday, he may in fact be dead. Cnn has learned that Najim Laachraoui is believed to have been one of the two suicide bombers who blew themselves up at the Brussels Airport killing at least ten people, injuring dozens more. This comes as the search is intensifying for this unidentified third terror suspect who failed to detonate his suitcase bomb inside the airport terminal. Cnn has people on the ground in the belgium capital. Lets start with the development over the last few minutes, word from belgian officials that laachraoui, the bomb maker, may be dead. Reporter belgian and french officials are telling cnn that they believe Najim Laachraoui, the man implicated in building the bombs that were detonated in the paris attacks is dead. Bell began counterterror officials are in the process of cross referencing his dna, but at the moment their working belief is that he is dead. Identifying Najim Laachraoui at the scene, placing him at the airport bombing scene is key, because it closes that loop on bringing together the overlapping between the network that carried out the paris attack and carried out this attack. Just to recap a little bit for our viewers how important, how dangerous this man was believed to be. His dna was found on the suicide belt of the paris attackers detonating in france. Back in january belgian counterterror officials told us they intercepted phone calls between him and abaaoud, the paris attack leader, where he was giving instructions. They believe him to be a key conspirator. He studied electromechanical engineering and that has been a great value of isis. But its really coming together. Investigators are overlapping them to try and figure out who else is out there. Stand by. Thats the latest. Najim laachraoui believed to be the bomb maker in brussels and paris, but what about that third man in that picture we were just looking at, the man in the lightcolored jacket, the man believed to have left the bomb at the airport. Clarissa ward is with us now. Clarissa, what are you learning about the search for that person . Reporter well, john, earlier we heard from belgiums prosecutor that there are still a number of people at large. These people may be armed, they may be dangerous. Among them, the primary focus of the manhunt is, as you said, the man on the right in that surveillance video. He is particularly distinctive because he is wearing a light jacket, he is wearing a cap an glasses. You also might notice he is the only one of the three of them who is not wearing one glove. Authorities believe that glove may have been used to conceal a detonator. We know that in his suitcase, which did not explode, there was a particularly large bomb, larger than the explosives that were in the other two suitcases of the two suicide bombers. Its not clear yet did he get cold feet, did the bomb not go off . Authorities arrived on the scene afterwards and were able to do a controlled detonation so the explosives did not actually harm anyone. But at this stage we still dont know where that man is. There are a lot of questions now, john. We are learning more and more. Najim laachraoui was wanted by interpol, he was on a red alert. The two brothers who are also attackers in these vicious attacks also had extensive rap sheets. So a lot of questions here as to why all of these men who were well known to authorities were able to slip under the radar and go undetected and carry out these attacks when this country was already on a state of very high alert, john. Indeed. A lot of questions, as you say, clarissa ward. Thank you so much. Stand by in brussels. Were also learning the identities, as clarissa said, of two of the bombers. They are brothers. One blew himself up at the airport, the other behind the attack on the subway. Lets bring in pamela brown. Pamela, what is the latest on the investigation . John, as clarissa alluded to, there were warning signs about both brothers. Turn turkish authorities are saying one of them was deported back to belgium last year for his ties to terrorism and the other brother has an interpol red notice that was issued this year for terrorism charges, yet both of them were able to wreak havoc in brussels yesterday morning. New details are emerging about the brussels suicide bombers. Brothers and belgian nationals, ibrahim and cla reed bakraoui. The suicide bomber on the left has not yet been publicly identified and the unidentified man on the right dropped off a large bag of explosives before fleeing. Translator his bag had the strongest explosives. A few moments after the bomb squad arrived at the scene, the bag exploded. Fortunately, no one was hurt by that bomb. Reporter an hour after Ibrahim El Bakraoui said off his bomb at the airport, his brother, khalid, detonated his bomb at a metro station in brussels. The taxi driver who drove the three to the airport led police to the brussels residence where he picked them up. Inside, investigators found bombmaking materials, including as tone and hydrogen peroxide, detonators, a suitcase full of nails and screws and 33 pounds of the explosive called tatp, enough to make multiple bombs. In a trash can on the street nearby investigators found a laptop. On it, messages from ibrahim before the attack stating he was, quote, in a rush and if he takes too long, he will end up with him in jail. Belgian investigators believe he was referring to Salah Abdeslam, one of the ring leaders of the november paris attacks who was captured last week. Investigators believe abdeslam was likely to take part in the brussels attack, and after his arrest, the cell accelerated their plans. As the manhunt continues for additional suspects, officials warn the threat is not over. A war has been waged against us and we must be totally determined in fighting this scourge. Weve learned from sources there was chatter prior to these attacks indicating something was about to happen but there wasnt anything specific enough for authorities to prevent the attacks from happening. The concern now is that others in the mens network will try to launch more attacks in europe in the days to come. John. Pamela brown, thanks so much. Lets discuss this further. Joining us now, our panel of terrorism experts. Cnn National Security analyst, julia, and former member of congress jane harmon from the House Intelligence Committee, also in charge of the wilson center. Thank you all for being with us. Julia, just over the last few minutes, so many more things have come to light. A lot of these threats starting to come together. The idea that the bomb maker, Najim Laachraoui blew himself up at the airport. The idea another one of the bombers left a will saying he was afraid of being caught and left behind 40 pounds of explosives unused in the apartment. What does this alltel y tell yo . It means last friday was significant, the arrest of abdeslam alive. Hes not captured dead. And the suggestions throughout the weekend by brussels officials that he was not only cooperating but they were using the term collaboratingment as we saw in the suicide note that they felt that they were about to get caught. Now, these are suicide bombers. They do not care if they die, they care if they are detained. So the arrest on friday sped everything up. And in particular, terrorist groups are organized in different ways but generally they have an operational wing and a technical and more sort of policy substantive wing. You never kill the bomb maker. Its a specialized skill. It must have been very clear to them that they did not have many moves left and he was willing to sacrifice himself. David, do you see it like that . You never kill the bomb maker. Juliet was drawing a distinction between suicide bombers, the soldiers on the ground and the people behind the scenes developing the process to carry out the attacks. If this guy was behind the tatp bombs in paris and behind the bombs here, that is a sacrifice to that organization to lose him in these attacks. I agree with that. Obviously he was a skilled bomb maker. His bombs worked in two major different terrorist attacks which not a whole lot of bomb makers out there can say that. The fact that he did die as a suicide bomber as far as we know seems to suggest that they felt the noose closing in on them just as soon as abdeslam was picked up by the sgloerts representative harmon, there is Something Else coming to light. The idea that the two brothers and now laachraoui will all know two officials. Laachraoui and one of the bakraoui brothers had notices from interpol. One was deported from turkey to belgi belgium. So three guys were able to pull out a terror attack. What does that tell you . First, you never kill the bomb maker unless you have more bomb makers. Possibly this guy who was, as i understand it, mentored by a brit in syria was one of a classroom of a students who can carry this on. There may be more waves of attack. But on your second point, thats very significant. Retired general john allen, who was head of the coalition, the effort to form a coalition against the assad regime and others in isis and syria said that the criminal element has played a much bigger role in these attacks than we understand. These are not just trained terrorists, these are criminals. And the fact that these people werent picked up, even though they apparently had rap sheets, as you just reported, shows me that were not casting the net broadly enough. If we did, not we, but the belgians arent. And if they had, we would have picked these guys up or certainly investigated these guys and found some really bad stuff. You never kill the bomb maker unless there are more bomb makers. I want to explore that in a little bit, so guys, stick around. Plus coming up for us next, now that we know the suspected bomb maker for brussels and paris, the bomb maker may be dead. The question is what did u. S. Intelligence know about this suspect and the other suspects beforehand . A member of the House Intelligence Committee who has been briefed, he joins us next. Osteo biflex, g hes noticing a real difference in his joint comfort. As well as heightened levels of abject humiliation in his son. In just 7 days, your joint comfort can be your kids discomfort. Osteo biflex. Made to move. Ricky Gervais verizon is the Number One Network in america. I know what youre thinking, they all claim stuff like that. Yeah, but some of them stretch the truth. One said they were the fastest. We checked, it was fastest in kansas city and a few other places. Verizon is consistently fast across the country. You wouldnt want to hear from the bloke who packs your parachute, its good over kansas. Do you know what i mean . So thats, you know. Anywhere else, splat. Only verizon is the 1 network for consistently fast speeds. And now if you buy a Samsung Galaxy s7 edge you get one free. At baas hard as the family everthat earned it. Work thats why were putting more food in our salisbury steak dinners and adding real cream to our mashed potatoes. So now. Theres more to love with banquet. Now serving. A better banquet. [eerie music] i am the ghost of cookies past. Residue. Oh. So gross. Well, you didnt use pam. So it looks like youre stuwith me bargain brand cooking spray leaves annoying residue. Thats why theres pam. Welcome back to the lead. Belgian officials warning that other suspects in the deadly terror attacks could still be on the run and they could strike again. Joining me now is republican congressman mike turner of ohio. He serves on the House Intelligence Committee. Congressman, thank you very much for being with us. Let me start with the breaking news, cnn learning over the halftime half hour that Najim Laachraoui, believed to be the bomb maker behind the paris attacks and making some of the bombs in the brussels attack as well, officials from belgium tell us that he is dead. Are you hearing the same thing . Certainly im hearing from your reports, but i think your Previous Panel and my good friend jane harman made an excellent point. You dont lose the bomb maker unless you have more bomb makers. And that really i think is the issue here. The United States needs to turn its attention to. Theres been lots of criticism for the president s strategy as looking at isis as contained. Theyre clearly not contained. We need to take them out and make certain that their ability to attack the west is diminished. Congressman, youre privy to information that we are not. Do you believe there are other bomb makers on the loose right now in belgium poised to attack . I think absolutely. I think the public is aware of that. The thing thats important here is belgium is just not prepared to be able to undertake the type of investigative look at tracking down these terrorists and bringing them to justice. They are going to need our help and the help of their nato allies. Well certainly be there to assist them and track these people down, track down these terrorist networks and eliminate their ability to execute terrorist attacks in belgium and the United States. There was an interpol red notice for laachraoui and one of for one of the bakraoui brothers and one of the bakraoui brothers was deported from turkey to belgium. These three people, were they known to u. S. Law enforcement . I cant speak to that, but clearly by the rap sheet you read they were known by the belgian authorities. Theres going to be a lot of second guessing as they look to what actions they have been taking to people they know is a threat and what they need to do tomorrow to continue to protect the citizens in belgium and brussels. So david nunez says he believes americans were the likely target given that the attack may have happened near a u. S. Airlines ticket counter. Do you think americans were targeted specifically in these attacks . Certainly if they sought out a specific counter with the symbolism of the name american, it certainly shows theyre looking to try to hurt us. I was just at that ticket counter on sunday morning and i can tell you my heart goes out to thinking of all the innocent people who work there that they have targeted. But this really goes to the viciousness of the terrorists and the immediate issue of why we need to take them down. People are at risk, they need to be stopped. You know what, i know everyone is hesitant to criticize in a situation like this when belgium is still very much involved in a manhunt right now, but do you think belgium based on what you know and your connections within the intelligence community, do you believe theyre up to this task . Not currently. I think with the United States help and others they can be. Certainly we saw from the attacks perpendicultrated from in paris, it was chosen because of the difficulty authorities have of tracking them down and taking them down. We need to do this. Certainly not just europe is at risk, the United States is at risk. We need to go further and get the president to get a fullscale strategy together to take down isis. We can find training camps, shut them down and prevent future bomb makers and future terrorists from going to europe and the United States. Congressman mike turner, appreciate it, sir. Thank you. Coming up, a rare and frightening warning for americans following the brussels terror attacks. The state department issuing a travel alert for the entire continent of europe. Then carpet bombing or banning syrians. What the 2016 president ial candidates have to say about fighting terror in the wake of the bombings. And one thats sweet. To satisfy the adult and kid in all of us. 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The new travel alert comes as we learn more u. S. Citizens were caught up in the carnage yesterday. Lets go to elise leavitt. This fieleels maybe more significant. Reporter thats right, its not unprecedented but its rare. The state department does not issue a caution like this lightly, particularly ahead of the Summer Travel season. But wi