This is the first visual that we have now of the aftermath. We are waiting for video. You will see that in a moment as well. In between the two explosions, the now alltoofamiliar and jarring path of a van that plows into human beings throughout enjoying a beautiful evening in barcelona just hours ago. Isis now saying that these are their killers. Trace gallagher has been covering this all day. Watching it with all of us at fox news. And quite a few moving parts in this story. What is the latest . Well, the early information, martha, coming from authorities in spain was confusing and in three languages. For most of the day we were told that the driver of the van that sped down la rambla trying to kill as many people as possible was in custody. As you said, we know that the driver is still on the run. Apparently disappearing into the crowd during the mayhem after the attack. There are two suspects who are in custody, but neither of them was arrested at the scene in barcelona. Instead, one was arrested in the town of where the van was rented. And the second was arrested in elk in order to pray to the side of the two deadly explosions. One was last night. Another tonight. On scene in both of those trying to link together the pieces. Police believe that the explosions are linked to the attack on las ramblas, but very unclear how. And police to acknowledge the two suspects in custody may be a part of a bigger cell. Meantime in spains catalonia region, a man who tried to run down police at a traffic blockade who was shot and killed was initially linked to the van attack in barcelona, but now police say that there is no connection. And to confuse matters more, police also released the name and picture of a man that they thought was the driver of the van in las ramblas, but that man walked into a Barcelona Police station identifying himself saying that his i. D. Had been stolen. Isis has now claimed responsibility. Releasing a statement saying that the attack was carried out by soldiers of the islamic state. Targeting countries trying to drive isis out of iraq and syria. Todays bloodshed was spains deadliest attack since 2004 when al qaeda killed 192 people in coordinated bombings on madrids commuter trains. Martha thank you very much. The trace will be with us throughout the evening covering the breaking news story. If the next guest is in barcelona. She was having lunch with a friend on las ramblas at the moment that this attack them in. She started to see people running for their lives. Police ordered everyone to get inside wherever they could pray to the restaurant that she ran into pull down the metal shutters, and she recorded this video from inside. Watch. We do not know what is happening. And one of the waiters showed us photos of what was happening. All we could see where the bodies. Like we are fine. But so scared. Martha there was a view from where she was. Alana fearon from ireland, wrapping up a holiday in spain before heading back home. She joins us now. Alana, it has been an unbelievable day for you. Talk to us about what you are feeling at that moment when you made the recording. Yes, obviously it was a bit of a serious scary situation to be in, because we were caught up in panic, but we did not know why or what was happening. And so, we were really scared. And there was a small gap in the shutter that i could see outside from where i had taken it looked like a ghost town, but there were police everywhere. Blue flashing lights, and all you could hear was the ambulanc ambulance. After about 45 or 50 minutes, the shutter went up, and solid 20 minutes of not being able to move anywhere. And we were told to get back inside. The shutter went down again. And although we knew was apparently there were two men, and that there was a possible hostile situation. The shutters went down again, and then we really started to panic. We did not know what was going on. And we were surrounded by siren sirens. And pandemonium. Martha alana, thank you. We are glad that you are okay. We watched your video and the story of seeing people in the van go by with guns hanging out the door. This is obviously the kind of thing that we have all witnessed. But to actually be living through it and realizing in real time that this is happening to you must be so terrifying. We thank you very much for sharing your story with us tonight. We hope you get back to ireland soon. If you look back to made the first, the state department issued a warning to all americans about Summer Travel in europe. It said this, extremists continue to focus on tourist locations, transportation hubs, markets, shopping malls, u. S. Citizens should exercise additional vigilance in these and similar locations, in particular during the upcoming Summer Travel season when large crowds may be common. It went on to say that terrorists will likely use vehicles as ramming devices. So tonight, here we are with death and destruction in the beautiful city of barcelona. Im joined now by lieutenant cornel, a cia trained operative. And mia bloom is a terrorism expert and author of dying to kill. Let me start with you, mia, you say that you came across some interesting things on social media. Looking at isis with regards to this attack today. Well, right away when there is an attack, the person that i do as i see what is isis saying about it. So we saw that isis made a claim of responsibility on a semi official channel. Almost right away. It did not wait a day or two days as we have seen in some of the previous attacks. The other thing was, very interesting that in previous issues of the magazine, and even more recently in june, they have been circulating videos of how to do these kinds of attacks precisely to try to inspire individuals to get in the car and graham civilians. In order to cause mass casualty attacks. So they have been trying to inspire these attacks. They put it in the magazine. They put instructions how to on there. Thats on the encrypted platforms. So this is directly out of the isis playbook. Martha 20, what do you think about the attack today . It is as horrific as it gets. Some news outlets i have not been able to verify independently, but reported ci spain coming into this specific warning. Im not surprised by that. Mike pompeo has doubly increase the pace of cias game quite a bit. And to the point of what we are talking about, social media. This is a pattern that we need to look at more seriously. We saw this on the attack in benghazi, we saw this before the eagles of death metal attack. Against the ban in paris. And clearly, social media issues something, we have to Pay Attention to it. And i have a lot of questions on the network about can we get ahead of us . We can, we have to study how they do things online. We have to go back to the methodology of espionage, getting people on the inside. We have had people like, chelsea manning, bradley manning, whatever you want to call him, and others who have compromised our capability to do technical collections. We have to go to the oldfashioned methodology. In social media is one of the areas where we can study a lot of patterns and try to get ahead of what they are doing based on the fact that they are starting to not only telegraphed things, but i think there are ways of seeing what they are going to do. Martha so true. Mia, it looks like they were building bombs in at least two locations. And time and time again you have the rows of flowers that come out the following day. Everything across twitter, the Solidarity Movement with the beautiful cities that have been attacked and people have lost their lives. And yet, we start to find out that people were on social media and looking things up, doing internet searches, so we have all this surveillance, and yet, we cannot seem to get ahead. Well, it is very difficult added to the fact that many of the platforms that i do my research on are not open api in the sense that it is not something that you could google. It is not something you actually have to be on these encrypted platforms in these very limited chat rooms. And so, i agree with mr. Schaefer, you do have to do the traditional intelligence gathering, but you have to do so almost undercover on the social platforms. I could not agree more. Martha but doesnt that happen . I would assume that the intel agencies have the same access that you do to these places. Is there protections that are in place that we need to rethink . There is. Sorry, go ahead, mr. Schafer . No, youre right. We were going down the path. We cannot get as much access as she does based on restrictions. This is something i met with and briefed leadership on last year. I brought in a group of experts who outlined how we are failing in this area. As to what she can do as a citizen does not match what you should be able to do. Martha how can that be . That was totally crazy. But she is looking at the right place, clearly. Martha that is stunning. I have to agree, one of the challenges have been coming you know, in order for me to do what i do, i speak eight languages. Im doing this in a number of different languages. Even though i am following strict ethical requirements, when i talk to different agencies, they cannot do what i am doing. They have told me its too expensive, too timeconsuming. We do not have the linguistic capabilities to get in and read the stuff in these languages and translate it and get it fast enough. She is qualified, she does her job, but the failure of leadership in dnc i to do the hard work to invest in people like her to get the job done. Thats how sad it is. Martha thats a wakeup call. Thank you very much to both of you. Good to see you. Coming up next, the cia may have known a bit about the terror plot for months, we now know that isis has wanted to strike spain for years. Why is that . Why spain . And what does this attack tell us about what may be next . Dr. Robert pape studying thousands of isis videos, came across one today that specifically warned about this. Raising the question about why the intelligence is not seen that . Mark studying the attack like this one that have brought to europe of late for years. And he knows what is going on here as well. Both are coming up next. [speaking foreign language] [sirens] their experience is coveted. Their leadership is instinctive. Theyre experts in things you havent heard of researchers of technologies that one day, you will. Some call them the best of the best. Some call them veterans. We call them our team. I kept looking for ways to manage my symptoms. I thought i was doing okay. 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This latest attack, the worst terror attack on spanish soil since the 2004 madrid train bombings, showing us that radical islamic terrorism is one of the greatest threats we face today. Isis has taken credit for this barbaric attack. But whoever is responsible should know that the United States of america together with our allies will find and punish those responsible and to drive the evil of radical islamist terror from the face of the earth. Martha our first look at that, coming in moments ago. Vice president mike pence sending a strong message to the attackers. A spanish media reports at the cia warned them that la rambla, this beautiful pedestrian and car area with lots of shops lining and cafes in the middle of barcelona, they warned them that this could happen. And thats warning according to the spanish reports came in about two months ago. So if that is true, the intelligence was certainly and sadly quite accurate. Isis did claim responsibility, quickly. As mia bloom was saying. A couple of hours after this. There have been post calling for attacks on spanish tourist hot spots as well. And saying we will recover our land from the invaders. Spain was a Muslim Country for 700 years. Ending in the 15th century. It is part of their spoken mission to take it back. Fox news chief intelligence Catherine Herridge joins me now from washington. She has been talking to her intelligence sources all day on this. Here with the latest. Good evening, catherine. The spanish authorities are connecting the attack within an explosion last night in a town 90 miles away. What may be a bomb making factory. Police telling reporters that two suspects connected to the attack are in custody, but not the driver of the white van. Counterterrorism source telling fox at the evidence is consistent with the small more complex plots rather than the lone actor. Fox news has told the intelligence agencies that they are reviewing the watch lists and databases to see if the suspects identified by spanish authorities were known to homeland security, the nations threat analysis, the fbi as well as others. And whether the suspects were blocked from entering the u. S. Because of their suspected terror ties. Spain is part of the visa waiver program. Almost immediately, isis social media accounts celebrated the attack in barcelona. These accounts are known in counterterrorism circles as fan boys, not to leadership accounts. But not long after the news agency, the mouthpiece for isis claimed responsibility. But not clear whether the individuals were inspired by isis, directed by isis, or simply opportunistic. Spain, as you mention, has not been traditionally part of the isis online conversation. In july, and isis affiliated telegram account mention barcelona specifically. Our contact says that it was flagged to Law Enforcement, as you also mention, the barcelona newspaper reporting that the cia warned the spanish counterparts in recent months about isis targeting the city. And specifically the area which is very much like times square in new york. Or the shop to lizzie in paris which has been targeted by isis as well. Martha here now with more, and American Enterprise scholar who has studied vehicular attacks for years. He is also a fox news contributor. And dr. Robert pape, director of the chicago project on security and terrorism, both experts in the field. Good to see you both tonight. Thank you for being here. Yes, thank you for having me. Martha dr. Pape, let me start with you. You have a database that studies the behavior of every suicide bomber that you contract, so we are trying to put together the pieces of who is involved here. But what can you get from it so far . Well, we have a database of 1400 isis videos, the complete set of isis videos. Over the last three years. And studying particularly the isis videos really gives us insight as to what has been happening. So particularly since the fall of mosul, isis has been calling over and over for individuals, inside of the country that are bombing or otherwise directing military activity against isis to attack those countries. Rather than to leave those countries and travel to syria. In the past, if we look at the videos, and the recruitment appeals, a very different pattern. They did call for individuals to attack in those countries, but many of the videos were calling for travelers. People to leave. In the last few months since mosul fell, you are seeing a dramatic shift in the video propaganda which is the heart of isiss threat to the west. Martha i just want to point out, im going to get to you in just a moment. A learning Spanish Police telling us that there is an operation that is ongoing at this hour outside of barcelona. We also have, so far, our understanding, and the story has changed throughout the day that the van driver, the person who plowed these human beings down in cold blood is out there somewhere. So we are going to keep a very close if i could just act, this would not be weird. What we also have done is studied the networks of the cells that have been plotting, particularly in the United States and europe, and what we see our networks. We see networks of friends, networks of relatives, and undoubtedly, one of the things driving the authorities in spain to be looking for connections. Martha you know, mark, you have studied this in depth as well. And the guy who we originally thought this was walked into the police and said that his brother took the papers in the car. Your thoughts . What is really important about what the doctor is saying is that we have to listen to the words of the enemy. They tell us what they are going to do. The fact is seven years ago, al qaeda and the geary opinion peninsula published an article called the ultimate milling machine, which urged jihadists to pick up the truck as a mowing machine to mow down the enemies of a la, and went into great detail how to go into the attacks. They have carried out these attacks in nice, berlin, stockholm, ohio state university, now barcelona killing over 100 people. Why is outsourcing really important . Because just this month, the latest issue of inspired just came out, and it urges them to carry out tracks clinic attacks on trains. They have a list in the magazine of train routes in the United States. The number one target twisted and here is the corridor between washington and new york and d. C. They have an 18 page guide in there to how to build a derailment device. So we have seen that the enemy tells us what they are planning to do. And we need to take the words of the enemy seriously, because we have seen for a particular attacks following the pattern, no it will be trains. Martha in that material, saying that they should put the devices on the tracks, not long before the train comes across bread because they do check the tracks from time to time. So they dont have a whole lot else to do, dr. Pape. This is what they spend their time doing, tracking the movements of the sorts of things and figuring out when the right moment is to plant something there. We need to be very vigilant. We need to be very vigilant and realize that they practice. They review in detail past attacks to make better and improved attacks into the future. These are not first just amateurs getting lucky here or there appeared to be his who are practicing and then they are putting on the web what they have learned from their best practices. And actually, the content is really at the heart, as mark is saying. And it is difficult to get a grip on, because lets say the 1400 isis v