Lefthand side of the screen. What you could see was a woman clinging by her fingertips to a ledge. There she is again. You see her just there right there. Shes hanging from the window ledge. Someone eventually pulls her up. And you see someone standing on the ledge, as well. They were there because they were trying to escape the gunfire inside. Absolutely terrifying. People hanging on for dear life. At least seven attackers strapped to a suicide belt and equipped with automatic weapons assaulted six locations in coordinated attacks in paris. A french politician has identified one of the suicide bombers as ismail many whom are in hospital tonight, fighting for their lives. The french president is vowing a ruthless response to what he called an act of car. He declared three days of mourning. Lets get more now from Fred Pleitgen. He is live in paris. We know the names, but were learning more about the identities of the attackers who were involved in this terrorist attack in paris on friday. Yes, certainly. It seems as though the investigation is moving forward and we saw the raids late yesterday in belgium that were going on, that were three people who were potentially connected to all this were taken into custody. Also one person was taken into custody who was going from france to belgium. He remitted a black vw polo that was later found at the site of the bataclan, the place where the worst attacks took place. So there does appear to be that connection between france and belgium. And we have the one attacker identified by his fingertip. He was identified by the local mayor of that town. So slowly we are learning more about the identities of the attackers. We are certainly looking forward to see whether or not more information is going to come out today. Again, this is an ongoing investigation. It appears as though that link to belgium is something thats becoming more and more important for the investigators, john. Fred, its isha here. This link to belgium narrowing down to a particular area, an area thats been known to authorities before. Some going as far to describe it as a den of terrorists. What more can you tell us about the specific area and its significance . In when the Charlie Hebdo attacks took place. There were also raids in belgium outside of brussels. It does appear that in that town in the past there has been some activity by people who apparently were radicalized and one of the reasons they had those raids there yesterday. So its something where, as during the last attacks with the Charlie Hebdo, there was a lot of weapons found there. Belgium does appear to be one of the countries that has a big problem with people who become radicalized and are able to acquire things like ak47s and possibly traffic them all the way to here. So we are learning more as this investigation is going on. Not only about belgium but also theres a possible link to germany, as well with a man who was arrested earlier this year and a lot of weapons found in his car in the head of german state of bavaria was saying there could be a link to that, as well. So slowly the pieces of this are getting put together. But its unclear whether theres a bigger, Larger Organization behind this. Whether or not this is a smaller cell that was operating. So a lot of work needs to be done. And fred, it seems that its very slow identification process here. Is it unusually slow, or is this to be expected given the high number of fatalities involved here . Reporter i dont think its particularly slow. I just think that the information that is coming out about the victims of the attacks is just something thats taking longer. This is also of course an Ongoing Police investigation, as well. We do know that there was one american who was killed, 23yearold student from california who was studying here in paris, studying graphic design. Theres also some citizens of mexico that were killed, as well. Of course, a lot of people from paris who were also killed. T the identities are coming out very close. In that bataclan venue, there were so many People Killed. It is going to take some time for the victims to be identified and to be publicly identified. That doesnt mean that the city here wouldnt be in mourning. Fred, the president is just arriving in turkey. Well have to leave it there for a moment. We can see the u. S. President barack obama just touching down for that g20 summit now in turkey. Of course, the issue of terrorism will now top the agenda. Undoubtedly. This is now going to be a very different gathering, this gathering of World Leaders. The issue of isis and move beyond containing them and actually defeating them. The president offering the people of france all the help that they will need from the United States and we now now the u. S. President on the ground there for that g20 summit. Lets head back to Fred Pleitgen. Right now there in paris, security incredibly high. Some of the most iconic sites in the world are now closed as a result of the security measures which have been put in place. Reporter for instance, the eiffel tower which is closed. There was a bit of a scare around the eiffel tower last night. We had a hotel that seemed to be a police operation. That turned out to be a false alarm. If you look at the streets of paris over the past days since this has happened or right here where im standing light now, there is noticeably a lot more Law Enforcement on the streets as well. We do know that until around tuesday, theres going to be at least 3,000 french soldiers that have been mobilized to keep security in place, in paris and if other places, as well. Theres at least 500 who are already on the streets. So certainly you can feel an incross in security. You can feel it especially in places considered to be vulnerable, like public transport, of course, also Public Places and iconic places. So certainly that is something that you can truly feel here. It doesnt mean people arent going out on the streets. We did note yesterday that the french authorities had told people it might be better to stay outside, not to venture out, but it feels to me people are venturing out, saying were not going to be intimidated by terrorism. You can feel that there is, even after this has gone on, still life here and that people are not allowing their way of life to be halted by all this. Okay, fred, thank you. Fred pleitgen there with the latest at this early hour just on 6 00 a. M. There in paris. The fbi is sending reinforcements to paris. Joining us is steve moore, a retired special agent for the fbi. Thank you again for spending time with us. Sure. As we look at this investigation, it is now taking on a broader european dimension. Its worrying but not surprising. This is what were up against now. As the president said, we have physical containment on them, but thats like saying we have physical containment on a cancer in the body. There are going to be billions of cells moving around the body, trying to metastesize. Thats what happened here. Unless you wipe out the original cell, its going to keep coming. See, were hearing from our justice correspondent that u. S. Law enforcement are running a batch of names, trying to get some positive i. D. Right now none of the names are none to the u. S. Terrorist suspects. One, is that a surprise . And talk to us about the identity of identifying the suicide bombers. Well, it kind of surprises me that theyre not on u. S. Radar at all. But then again, there might be some names we dont know about. Youre not going to hear everything thats going on for one reason, they dont have time. The other thing is that when you get the bodies, and when they say we found a body, you found parts of a body. So now youre looking for fingerprints. What the terrorists are looking for is somebody thats never been involved in terrorism before so that they can get through boarders, they can get through all sorts of security measures, and their fingerprints may or may not be on file in a country, as you know in pakistan, fingerprint records, yeah, think about it. You mentioned identification of the attackers, but you also said you dont feel the authorities necessarily have a full grasp of that. I cannot believe that eight people did all of this. When you look at the two cafes, there was not a resolution of the situation by authorities, the violence just stopped. So it is very possible that after the shooting and the bombing, the shooters disappeared into the crowd. We have a situation where the frenchman who stopped at the belgium border on saturday, driving another car with two other people, there is a suspicion that may have been another cell, which was trying to get out of the country. Does that make sense to you . It could be another cell, or it could be part of this cell trying to escape. When we get into discussing cells, what we have to realize is that one cell may not know what another cells doing. And its going to be hard to even define a cell. You saw that the fbi is looking at 900 terrorist cases. They dont even sometimes know if they have a cell or if they have a single radicalized individual. Thats how difficult these investigations are. So whether theres a cell here or three individuals who were affiliated, we dont even know that now. And they may not even know that. Steve, many unanswered questions, much we dont know. But one thing we do know, the types of explosives used by the seven attackers. Tatp. Right. Talk to us about that. Tatp, those are the type of explosives that we would expect terrorists to come out with from the middle east. Theyre used all through europe for different things, for industrial purposes. You can get them, but who has what . That kind of tells us who might have supplied these explosives. If we know that a Certain Group has a supply of tatp or has used tatp in the past or used whatever, this helps the investigators to narrow down who the cell might be dealing with, because somebody is supporting them. They didnt make this explosive in their living room. This is all about not just finding out who did this, but stopping the next one. Well talk to you again soon. Many in paris are taking time to visit makeshift memorials at the scene of the attacks. Atika scubert spoke to some of the mourners about the horrible violence and how it might change the city. Reporter the sound of paris has been reduced to a murmur of mourning, as parisians come to this tiny corner of the city to see the aftermath. Alexandra was supposed to meet her friend here last night. Maybe i catch you later, guys, and i never catch them. They died. She was my friend. And i didnt say to my family, i said to my family i go there and i didnt say im changing my plans. So my mom came to the hospital to see if she can find my body. Reporter they stair at the bullet holes and look in disbelief at the sidewalks covered in sawdust and sand to absorb the blood. They come with their dogs and bicycles. They hold their children. The police allow people to linger close to the crime scene. They share an intimate grief. You can still see here the measuring tape used by the Forensics Team to measure the bullet holes here. And this is just how raw the emotion is. People have been coming here throughout the day, dazed and shocked, trying to understand why a place like this would become the target of a terror attack. Mother and daughter, vivian and caroline, live around the corner. Do you think this will change paris . Yes, of course. Reporter were scared, says caroline. Im worried for my neighbors and this will change our daily lives. But we are stronger than this, she says. Noah nieman from california was enjoying a glass of wine when he heard shots ring out. I heard lots of gunshots and i stood up to sort of peek around. And i saw terrified people running at me. Reporter in this neighborhood, everyone is a local. Alexandra says they struck at the citys warm heart. People this morning were crying and i just they didnt touch they touch my heart. Its just like missing something. Reporter the heart of a city that still beats with life, even as it grieves for its dead. Atika scubert, cnn, paris. Lets get more now how paris is coping after these terrorist attacks. Thank you for joining us. According to some of the things i read, theres a lot of grief in paris after these attacks and post Charlie Hebdo attacks. But some people we have spoken to said paris feels different. Its not quite the same emotion. How would you describe it . I know youve been out and speaking to people. Reporter yeah. I think i mean, obviously theres a lot of emotion here in paris. I think the difference between now and the Charlie Hebdo attacks is that there is a lot more anger. Anger at the Islamic State and anger from some organized parisians that their government got involved in the war in syria and brought it home to france. We were here yesterday and at the site of the bataclan were killed. Many people were living flowers and candles, but mixed with the sadness is this residual anger. Mirren, there will be more grief and pain in the coming hours, because we have this National Service planned sunday. How will the people of paris be dealing with that grief . Reporter well, i think its going to be difficult. I think the memories and the images are going to linger for a very long time here. These are the worst attacks in paris since world war ii and the worst in europe since the 2004 madrid bombings. So its going to be a difficult week for paris. A national day of mourning is part of the collective three days of mourning and its going to take a long time for the wounds to heal here. I know youve been speaking to members of the Muslim Community in paris. What is their response to these horrific attacks . Reporter yes, we went specifically to speak to the Muslim Community. Theyre scared of there being a backlash against muslims. Theyve all expressed outrage at the attacks. The gunmen just shot and killed anyone that got in the way. And that may or may not have included other muslims. The overwhelming message was, this is not something that should have been done in the name of islam. Islam is a peaceful religion. It was something that everyone we spoke to, and we spoke to about four or five people, they utterly condemned it. And mirren, for the first time this century, passports are being checked at the French Border crossings. Thats a powerful symbolic measure that something here has changed, because those measures could be in place for some time. Reporter yes, absolutely. I mean, i believe its the First Time Since 2005 when paris had riots that they had declared a state of emergency. But the tightening of border controls does make sense. Were hearing that belgium made three arrests of men believed to be linked to the attacks. And also were hearing that a syrian passport was found with one of the gunman, who is believed to have come in to france through the greek islands disguised as a refugee. So we can see these tight border controls as france works out who these men were and how they got into the country. Mirren gidda, thank you for joining us so early in the morning. Thank you. Coming up here, a father and his joining son describe how they survived the massacre in paris and what one of the shooters told them. Thats up next. Plus, were learning the names of some of the victims. Their stories coming up. Do stay with us. At ally bank no branches equals great rates. Its a fact. Kind of like shopping hungry equals overshopping. The possibility of a flare swas almost always on my mind. Thinking about what to avoid, where to go. And how to deal with my uc. To me, that was normal. Until i talked to my doctor. She told me that humira helps people like me get uc under control and keep it under control when certain medications havent worked well enough. Humira can lower your ability to fight infections, including tuberculosis. 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At least seven attackers working in three teams targeted six locations across paris friday night. 129 people were killed and 352 wounded. A french politician has identified one of the terrorists. Isis claimed responsibility and the french president has vowed there will be a ruthless response. Belgium authorities made a number of arrests after conducting raids in connection with the attacks. More than 100 people were killed in fridays terror attack. There was no singling anybody out. There was just random victims. And so many lives cut short. Each of those people with futures, with dreams, with so much ahead of them. Energetic, thats how nohemi was described. The 23yearold was studying abroad in paris. She was meant to return home after one semester. She had a very joyous personality. She was extremely lively. Extremely energetic. Reporter british citizen nix alexander worked with the band eagles of death metal, which was playing at the bataclan theater. According to his family, he died doing his job he loved. They said nick was not just our brother, son and uncle, he was everyones best friend. Generous, funny, and fiercely loyal. His girlfriend tweeted, sleep tight, my sweet prince. Three victims were from chile, including lewis fi lipe, a musician who lived in paris for eight years. Valentine ribet also lost his life. The paris bar tweeted, our heartfelt thoughts to the relatives to a talented young lawyer, murdered. President of youn versal music france tweeted universal music family is in mourning. Thomas maria, manu, our thoughts are with their families. Rest in peace. A french soccer was on the field friday night when terror struck there and hit very close to hem. His cousin was there to support him and lost her life. On his facebook page, he wrote that she was a guide and support, a big suser. And he urged people to remain respectful saying its important for all of us who are representatives of our country and its diversity to speak and to