Bomber. A major manhunt is under way for the unidentified third man. Counter terrorism Officials Say theyre concerned about more attacks in europe and isis operatives have picked out potential targets. Cnn has complete coverage of the attacks in brussels. Well here from our team of correspondents throughout the next several hours including a report on how sophisticated these bombs are now. We are getting a much fuller picture about who was involved in the track, but crucially how it has links with the same network that carried out the paris attacks last year. Reporter exactly. I think that investigators when they raided that apartment after a tip off by a taxi driver found these huge quantities of explosives and that was the exact explosive used in the paris dwaattacks. The question is have they been able to identify all of the members of the network. We know at least one is on the run, probably more, but how many more and are they capable of carrying out more attacks. This is a huge concern for officials. Theres a lot of concern that there could be multiple targets across the continent. And yet the city is still trying to come to terms with it, but for the families of those who were killed and for those who more than 200 people injured, wasnt it, theyre still being dealt with. There are still people unaccounted for. Reporter absolutely. One of the toughest challenges here is because of the nature of the attack, these massive bombs, they ripped through a lot of the b bystanders that were there and its made it hard to identify people and hospitals are finding theyre full still days after the attack. The day after twin terror attack shattered the city of brussels hospitals are dealing with the influx of victims. This is where at least 80 of the victims from the airport blast were brought to suffering from multiple burns and shrapnel wounds. The entrance was transformed into an emergency ward designed for disaster. Many have been transferred to the burns unit, though the hospital is working with investigators to identify the dead. This man was among the first medics at the airport. What was the first thing you saw when you got to the scene . Chaos. Dust chaos, people shouting and crying and yelling help over here. It was a war zone. Reporter for 20 years he has served as a military medic in places like afghanistan, but he has never seen anything like this. A bomb that investigators believe was packed was nails and bolts. I saw a lot of people with holes in their body. The people were hit by pieces that flew around. I saw children with wounds penetrating wounds so it has to be some explosive device, things are floating around with a great power. Reporter outside the hospital soldiers stand guard. The belgian flag flies at half staff. Do you also have a picture of your girlfriend . This man is searching for his girlfriend. They have a 1yearold son. What kind of a person is she . Shes very shy. Shes short and shes reporter strong . Strong, yes. Reporter shes a strong person, yes. Yes. He has set up a Facebook Page for information. She was studying to a botanist and on her way to school when the bomb ripped through the train car. Her last iphone location was near the metro station. Are you worried that shes been injured and unconscious yes. I dont think. I dont think. I dont want to think about it. Reporter hospitals across brussels, the heart breaking search for answers continues. Now, as you heard there for many family members they dont want to imagine the worst. They are providing however dna samples, dental records, anything that might be able to identify loved ones that were caught up in the blast, but it is a painful thing to do. Thank you. The attacks confirmed a disturbing reality that brussels is now a major hub for jihadist. As we saw in November Isis has spread from the middle east and beyond. We report on the expansion. Reporter Salah Abdeslam captured in brussels following extensive raids of homes across belgium and france. Authorities admitting the scope of the network was bigger and more so first kated than ever imagined with belgian a logistic capital for some muslim extremists to launch their attacks. It illustrates that its very worrying. Reporter belgium is a small country. About 6 of the population is muslim. Many originally from more rack koe. The highest number of fighters to isis have come from belgium. Some 500 men and women believed to have traveled to syria and iraq. Many were inspired by the power jihadi group which gained prominence in 2010. Its leaders targeted a Vulnerable Community with crime and unemployment. Two or three men who were critical in the recruit proceme process and in the fundraising and getting the channels organized to send people overseas. The belgium authorities did not take it seriously until it was too late. The damage had been done. Reporter prosecutors say hundreds have been arrested or detained since novembers paris attacks. The most notable belgium linked terrorists included the high speed gunmen, Salah Abdeslam and all three of the brussels suicide brothers. Salah abdeslam was found in a neighborhood that is a hot bed for jihadist activity. They havent been able to ramp up at the same rate as foreign fighter recruitment as ramped up. Reporter those fighters are well funded, well protected and intent on destroying the west. Authorities have been investing heavily in counterterrorism. Still the Community Remains insula insulated. Police have a long way to go to fight what is an invisibility army. Cnn new york. We have a reporter for news week, has reported extensively from the neighborhood where some of the suspects lived. You went back there yesterday. What was what was the feeling compared with other visits to that area . Reporter it was very strange. It was all boarded up and no shops or kacafes were open. One man who ran a Grocery Store there said there was a sense of fear in the neighborhood. Police raids have been going on there and i suspect perhaps the community worried about reprisal. Molenbeek was busy and open for busy. I dont know if thats because molenbeek is no longer the real focus of the police or simply because molenbeek having been raided since november is sort of used to it. Do they feel the police are on their side . Reporter i think thats hard to say. What i would say in these kinds of neighborhoods where you have a lot of people from immigrant backgrou background, low incomes and high unemployment rate, often there is a rift between them and authority figures. Its common in cities across the world. What we keep hearing is the Security Services to get across to these communities to identify people before theyve been radicalized. They dont have the intelligence coming out of them and how do they improve that. The Belgian Intelligence Services have been saying that they are understaffed and i think its about having people from those background and those areas on your team and on your staff. Thats probably the best way to get integrated within the community. What sort of people make up the police and Security Services trying to tackle an area like molenbeek where a typical belgian would stand out, right . Absolutely. I think whats lacking is people from the communities within the police force. The other thing is its a very tight knit community. I was speaking to a taxi driver who says everyone knows everyone. Some people have implied that maybe the people in molenbeek knew that Salah Abdeslam was sheltering there. Not necessarily supporting him, but they dont want to get involved because they dont feel the police are on their side. Reporter exactly. I went to a house that was raided in december and they found Salah Abdeslams fingerprints are. Everyone i spoke to said they heard and knew nothing and i get the sense that they didnt want to open up. How do you think the police can encourage people to go to them if they have a small suspicion . Reporter i think all European Police forces have played it very clear that you can report the problem if you notice it and there have been instances where parents have said they feel their children are being more radicalized. It requires a vast amount of staff which i dont think they have at the moment. Did you feel safe there . Reporter i did feel very safe. When i was in paris in november, that felt a little bit less safe, but the interesting thing about molenbeek is theyre right next to the center of brussels. Theres a mixture of high Income Housing and low Income Housing. Its similar to neighborhoods where i live in london. So i did feel safe and its very interesting places to visit because you know there is a problem with extremis extremism politicians are at extreme ends of the spectrum suggesting that having open boarders means we are less secure, but at the same time people feeling a lot of these suburbs, a lot of the immigrants and refugees are going to those areas when perhaps the solution is to have a more integrated approach to bringing migrants in. Do you stop immigration or do you bring people in to make people feel safer. Reporter everyone in europe is talking about a more integrated europe in terms of intelligence sharing and thats something that could help with the problem. This idea of a shared database, its never going to happen. Are you going to share your details with the french Security Services . Its never going to happen. Reporter perhaps not a shared database, but some form of intelligence sharing. A lot of officials are talking for a more integrated europe. They say the problem is people coming back from syria, theyre saying that maybe needs better policing, but its not a question of stopping migration and raising boarders. Can you explain to people from what youve learned how we get in a situation where people are going to syria no one seems to be aware of it and the authorities and then theyre coming back and theyre not being tagged. Reporter reporter i think the sheer number of people going to syria makes it very difficult to follow. What you have to remember is syria is not that far. Its quite easy to get to turkey and then slip over the boarder to syria. The islamic state, isis groups, they know how to protect people. I think it is difficult for Security Services to monitor each an every person who goes there simply because they are going in very large numbers. Just describe the complexities of these areas where the jihadis are from because what you find is a complete disconnects between the older and Younger Generation because the older generation want to do as much as they can and they want to help. Reporter i think it goes both ways because we have heard that some of the Younger Generation feel their parents arent integrated enough and they blame them for their feelings. I think its too difficult to distinguish the two groups like that because there have been reports of the older generation radicalizing the Younger Generation as well. I think in belgian and in many countries across europe theres a big problem of integrating these people from different backgrou background. Its been a painful wait for the relatives of the people missing here in the attacks in brussels and those who died. Next youll hear from the families anxiously Still Holding on to hope. Lease a 2016 lincoln mkx for 399 a month only at your lincoln dealer. Coming soon from progressive, its savin u, the new hit single from the dizzcounts. Cash money the Biggest Discount and understand. The dizzcounts. Safe driver, paperless, paidinfull, multicar and joey fatone. Savin you five hundred im savin you five hundred we have autotune, right . Oh, yeah. Thats a hit all yeah with Heart Failure, danger is always on the rise. Symptoms worsen because your heart isnt pumping well. water filling room about 50 percent of people die dog whimpering within 5 years of getting diagnosed. But theres something you can do. Talk to your doctor about Heart Failure treatment options. Because the more you know, the more likely you are. dog whimpering to keep it pumping. We are lerchiarning more ab the moments right after the blast moments after. A taxi driver was outside when it happened and he went inside to search for his son and heres his incredible story. Ultimately a positive story for him. Were learning more about the victims of the devastating terror attacks. The pain is unbearable for the families for the people injured and killed, including this woman, the first fatality to be identified. S she had been living in belgium for six years. She was at the airport with her husband and twin 3yearold daughters waiting to board a plane. Her children and husband did survive. The molenbeek metro station in brussels, this man was killed. He worked for a government organization. He was on his morning commute when the explosion went off. Its been agonizing wait for the families of the people missing since the awful attacks. Every minutes and every second relatives are hoping to receive a call or message simply any signal that they have not lost the people that they love. Here is john berman. He was the the airport with his sister sasha waiting to fly back to new york. He was on the phone with their mother when the bombs went off. The phone line dropped. They havent been heard from since. Friends and relatives have flooded social media with pleas for information. We love you, let us know youre safe one post reads. Another says we still have the hope they might be with somebody. This man was at the airport with his wife. They were waiting for a flight to miami. Both were missing after the blast. Their daughter pleaded on facebook for any news. Every tweet, ping, gold ring has us trembling just in case. Then she posted this, my mother is found in hospital. Still no news of my father. 79yearold and dra is still missing. Bart texted his girlfriend on the way to the airport. He was on his way to visit her in georgia and was supposed to text her a picture of his boarding pass, but emily never heard from him. When she calls his phone, theres no answer. These last two days have been something i never thought i would feel. Its been the worst days of my life. I just i guess i didnt know how much one person can love another until until you just dont know where theyre at. Im just hoping for a sign of some sort that hes okay. Reporter bart is marketing student in belgium. Hes 21 years old. David texted his aunt to tell her he was safe after an explosion in the airport, but then commuted on the metro and hasnt been heard from since. Friends and family have been desperately trying to find him. They fear he was caught in the second attack. His partner has been driving from hospital to hospital trying to locate him. This woman was traveling on the metro during tuesdays attack. She was 29 years old. The brussels resident has been missing since then. We are desperately searbeen searching for her. This womans phone was found near the station after the terror attack. She has a 1yearold son who was staying with his grandmother as they search for her. Cnn new york. M migrants are using makeshift notes. This one reads belgium, syria, the same fear. Many people fear the attacks will hurt their chances of reaching european countries. Whats happening today in belgian is so bad for us. Maybe they will more afraid of us. They will make things harder here for people here. People here have nothing to loss. They cant come back. They will stay here and they have not choice not to stay here. More than 12,000 mig grants remain in camps there. Were learning more about the bombs from tuesdays attacks here and they have the Global Intelligence communities extremely worried. Up next why clues point to a more deadly isis explosive. Every day, america prints about half a billion dollars. Wow sadly, a whole bunch of those dollars are used to pay too much for car insurance. Luckily, theres esurance. Born online, raised by technology and majors in efficiency. Which saves dollars. And when they save, you save. So you can tell some of your dollars, good news, gang were going out for ice cream auto and Home Insurance for the modern world. Esurance. Backed by allstate. Click or call. Youre watching special coverage of the terror attacks here in brussels. Belgian authorities are on a massive manhunt for a suspect in tuesdays airport bombings and say these attacks may be part of a wider plot. They say a man left a bomb at the airport and is on the run. And Police Believe one of the them was Najim Laachraoui. He was previously named in the attacks in paris in november. And we have new details about the bombs used in these attacks. They say theyre hiybrids. This man on the right, a suspect on the run, still unidentified, considered one of the most dangerous men in europe. Hes believed to have been a leader of the suicide bombers at the Brussels Airport tasked with make sure the others carried out the attacks. Belgian investigators say the same terrorist cell master minded the paris and brussels attacks and now they worry that the bombings have revealed a hybrid capability. Combining a suicide vest with a more powerful explosive in a suitcase. What kind of flexibility does it give them to pack the explosive power of a car bomb with this. It gives them a lot of flexibility. This photo shows the three men pushing suit cases on carts. Two of them are wearing one glove each. Investigators tell cnn they think its possible that each mans glove hid a detonator. One conclude to the explosive is what police found in an apartment raid. 15 kill grams of explosives. 30 liters of hydroper objection side. Tatp, a very unstable kplo explosive that packs a nasty punch. This video shows it combusting from a tiny film cannister. Its one of the most sensitive explosives known and it takes very little to set it off. Its so delicate that just trying to make a bomb with it can be deadly, but if a terrorist is successful in making one, he has another advantage. It can be more dangerous because its difficult to detect. Bombs that are difficult to detect, easy to make, combining massive explosive power to maneuver through a crowded airport, a tactic so effective experts were it will be repeated. Essentisomething that we wil