And kwoorm good morning. Im carol costello. Thank you for joining me. Some of the worlds top terror investigators scrambling to unravel the belgian attacks and racing to prevent the next ones. And an all out man hunt. Sources telling us there may have been a second bomber at the belgium train station. Surveillance cameras captured a suspicious looking man holding a large bag but it is not clear if he was killed in the blast. If alive he becomes a second focus in the hunt for this man, the third airport attacker. Police still have not identified him. But we now know the names of the attackers killed. Both at the metro station and at the airport. On the far left is najim laachraoui. And the prime suspect, Salah Abdeslam is no longer cooperating with investigators in belgium. His attorney is demanding he be extradited to france as soon as possible. Correspondents, analysts and experts are covering all angles of this unfolding story. We begin with cnns phil black at the maabeek metro station. It was here where it was the deadliest of the attacks. At least 20 people died in what investigators say was a suicide bombing. We understood they had identified one person who was involved. One of the brothers involved in the overall operation khalid el bakraoui. Now today we hear they are looking for another suspect. Someone bhofrs apparently captured on security video in the moments before the blast with a large bag. Now the language they use in here is interesting. They are talking about seeking this person. That doesnt make clear where they believe this suspect also died in the blast or whether he is now another member of this network that is effectively on the run and police are trying to catch one him in that sense. Phil black live for us this morning. Now lets turn to the attack on the airport and new links investigators are chasing today. Nima al belbagir is in brussels. We know they are the seeking the man in the light colored jacket in the surveillance still image thats been disseminated by authorities here. But i just wanted to remind our viewers of the other threads now becoming apparent in this investigation. Take a look at this, carol. Just two days after the deadly coordinated attacks on brussels, investigators are scrambling to piece together the trail of clues on who the terrorist were and whether they have other accomplices. Authorities identified two out of three suspects. Caught on airport surveillance cameras before two bombs went off. On the left, najim laachraoui, prosecutors say hes a bomb maker whose dna was found in the home where the devices for the paris attacks were made. Next to him is Ibrahim El Bakraoui. The second suicide bomber. Last year he was deported from turkey to holland. He had a criminal record but coy couldnt determine any links to terrorism. The third man still unidentified and now most wanted man in all of europe p. Investigators say he dropped off a suitcase full of explosives and fled. An hour later a metro station near several European Union facilities also rocked by terror. Investigators learned he detonated in the second car of a crowded train at rush hour. Before the attacks belgian Authorities Say that until now these belgian born brothers had been linked to violent crime, not terror. Khalid was arrested 2009 for carjacking and five years in prison and ibrahim was arrested after shooting at police in a robbery in 2010 and had nine years in prison. This as we get another look at the horror that unfolded moments after the blast. A taxi driver capturing this chilling video, filming as he runs into the departure halls to find his son, who worked at the airport cafe. Thankfully he survived. He stumbles over debris. Bodies buried underneath the rubble. A baby cries in the middle of it all. Alone. Her mother lays unmoving. Here a single rose lay crushed. Possibly a welcoming gift for an arriving passenger. Now a symbol of lives lost in this tragic terror attack. Outside bystanders coming to the aid of the injured, waiting for medical assistance. Those who are able comfort the wounded. Though many inside did not survive. We have some news just into us here, carol. Belgiums interior minister has offered his resignation over his countrys failure to detain Ibrahim El Bakraoui when he was flagged to them by turkish authorities. As weve been reporting the Prime Minister has not accepted the resignation. But it gives you a sense of the seriousness of these intelligence gaps and the ramifications of them. Nima elbagir. Live from brussels this morning. U. S. Officials telling cnn they are seeing emerging signs that isis leaders in syria may have helped in the attacks. Evan prerz is live with more. What were hearing from intelligence and counterterrorism officials are those emerging signs that isis leaders in syria had a hand in directing or at least facilitating the team that pulled off the attacks in brussels. There is still a lot of investigation to be done and no hard evidence of a direct line to isis and external operations in syria. What we are talking about is more of a dotted line connection. The Broader Network behind this attack and the one in paris shows a much more sophisticated planning operation than western intelligence agencies thought that isis was capable of. A year ago u. S. Intelligence agencies had broad disagreement as to whether isis even had the external operations capabilities. That the group was more focused on taking territory and building its caliphate in syria and iraq. What they didnt know at the time was that isis was already sending trained bombers to europe. The paris attacks certainly put those questions to rest. And isis appears to have more of a loose control over those attacks. The bombers have some autonomy over when and where they are going to attack. Now investigators are racing to try to figure out to t support and the money system that these attacksers have in europe and where isis is looking to strike next. Evan perez live from washington. Authorities in belgium under scrutiny in the wake of the brussels terror attacks. Many questions whether officials have missed major warning signs, just months after similar coordinated attacks were carried out in france. In paris. I sat down with the u. S. Defense secretary ash carter to talk about it. It is not enough that we defeat them in iraq and syria. What brussels tells us is that they have a sympathizers, people who are belgians or french, who live there already. And there are an important part of the fight is also going to be a Homeland Security and intelligence and a Law Enforcement fight. On the other thing i think that brussels event is going to further signify to europeans is that they as we have been accelerating our campaign to defeat isil in syria and iraq and elsewhere, they need to accelerate their efforts and join us. Why arent they . Thats exactly right. And the European Countries are doing a lot more. Now in many cases they dont have the military capability that they used to have. And they certainly dont have the military capability that we have. And thats fine. We can do a lot of the military job. Where we need the europeans and also the gulf states and the rest of the coalition is for example, rebuilding these places that have been destroyed. Helping them to be governed. Because remember, our strategic approach in iraq and syria is to help local forces to take back territory from isil. Because after all, they have to live there afterwards. Lets talk about this. Im joined by cnn terrorism analyst paul cruickshank, coauto ore f asian storm, my life inside al qaeda. And peter beinart. Welcome both of you. Peter, that surprised me when the defense secretary said that europe needed to accelerate its fight against isis and terrorists. Because you do wonder like paris happened. So why isnt it . Well i think there is a good story in the New York Times today about the difficulties of the coordination. We know how difficult it is to coordinate between governments. Here you are talk about a continent with a lot of different sovereign governments. Times said the europeans dont even have common way for trans lit rating arabic names. In the difficulty of belgium getting the information they needed from turkey to be able to trap this guy. Paul, what does europe need to do now . Well i think one of the things that ash carter was referring to was the actual war against isis in syria and iraq and apart from france, most of European Countries are making very modest contributions to the antiisis coalition efforts. Britain has very few combat aircraft in operation. A country like belgium does have some aircraft that are bombing isis in iraq. But they have limited capabilities. European countries have not been spending much on defense. Their Defense Budgets have gone down. They are losing frankly some of these capabilities to launch air strikes that they may have had a generation ago. So they need to contribute more. Because as long as isis has that safe haven in syria and iraq, this terrorism is going to continue. It is going to accelerate. This is one big terrorism safe haven. Thr are thousands of western recruits who have gone in. And they need to get rid of that as a hugely urgent task. Well it is urgent. Especially in light of what evan perez reported. If things are being orchestrated from syria and they are sending people in europe, these bomb makers and organizers of these terror attacks. Why does i understand that europes been through a terrible economic time and they probably dont have the money to invest in a lot of, you know, military equipment. But as ash carter said they can do other things. They can still coother things. Sure. This has been a longstanding complaint by the United States that the europeans dont invest more in their militaries. And i think you are right. The fact that europe hasnt rebounded as well as the United States has from the financial crisis it means it is hard to have the budget for that. I think were this a particularly dangerous moment now because there is some evidence that as isis is losing territory in syria and iraq, they are trying to make extra effort to attack in europe and elsewhere to show their relevance, showing their supporters that they are not losing. And so were in this dangerous moment where the very success we are starting to have in the middle east is in the shortterm, maybe not in the longterm but in the shortterm potentially making isis an even greater threat. That is a scary proposition. I want to center on the United States for a second. Ash carter told me there is a difference between, you know, the terrorists carrying out these attacks in europe and some of the terrorists who have carried out attacks here in the United States. So id just like you to reiterate the difference and why americans perhaps neednt worry as much as the europeans have to. Carol as the simple math of arithmetic. About 200 americans have traveled to syria and iraq to join the various jihadi groups. Around 6,000 europeans. So 30 times more europeans have traveled than americans. And you can roughly translate into a terrorism threat which is at least, at least 30 times but actually much bigger because there are other greater radicalized community in europe. So this is a vastly greater threat in europe. And the threat in europe. The biggest threat is isis directed this attack was make no mistake about it. Isis directed this. This was the same cell as the paris cell. They were given their marching orders from isis. They filmed an elaborate propaganda video before the paris attacks were. Almost all the attackers appeared in. And this was coming from the very top of isis. So it is no surprise the belgian interior minister wants to resign, right . Thats what that says. Thanks both of you. That is my other terror pam. Thanks to both of you. I appreciate it. Still to come in the newsroom, the excruciating wait for information about missing americans in brussels. We stop arthritis pain, so you dont have to stop. 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Cnns on whats been doing to locate and identified the missing but i want to start with International Correspondent frederick pleitgen. Hes at whats called now the airport morgue. Hi fred. Hi carol. Yeah, and the morgue here at the airport in brussels is of course the place that pretty much all of the bodies that were the people who were killed, after the bombing at the Brussels Airport were brought to. And they have been ever since that bombing took place. And the most recent information weve gotten from the authorities here is that even three days or the third day after this attack place there still hasnt been a single body thats been identified with absolute certainty and thats certainly something very troubling to people who are still missing loved ones, who are still missing friends and possibly family members. But of course as always is very troubling to the authorities as well. Nevertheless we know from the people who work here and also from those who work at other morgues around the area of that metro station that was hit, that of course the people here are really working around the clock trying to identify the bodies but in ma m cases these were very, very powerful explosions that hit that area. And so it is very difficult for them to say with certainly who the identities of many of these people. Frederick pleitgen, live from brussels this morning. So not easy. No its not. And very sad. The issue is we still dont know those names with certainty. And so pain staking for the families who vntd heard and just want some answers. So we know that state deputy is reaching out to any sources that they have out there. We have people from the consulate in belgium actually going to hospital, trying to cross names off the list of people injured. But again we dont know the people who have died in these enormous blasts. Of course we have a list of people missing. 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Man what do they know that we dont . Wo