And you are looking at the scene in paris right now, marchers in the streets up to a million joined by political leaders from all over the world all gathering in solidarity against the worst attack by radical islam that paris has seen, unprecedented security in place, the french Prime Minister now says his nation is at war and abcs senior Foreign Correspondent terry moran is on the scene. Good morning, terry. Reporter good morning, george. It is an incredible moment here as this huge throng is just about to step off on this march of national unity, of solidarity and shared grief. Dozens of World Leaders are going to be joining them later this evening. Security, as you say, is very tight. The main feeling that you get in this crowd, though, is one of determination as if the whole nation is rising up after being knocked down by that terrorist rampage this weekend declaring as one, no, we will not live in fear. With paris still traumatized by terror, security is very tight. Thousands of troops and police, plainclothes officers in the crowd, roads and streets blocked off. Theres acute concern about copycat attacks and overnight in hamburg, germany, the offices of a newspaper that published some of Charlie Hebdos cartoons firebombed but in the bright winter sunshine this day really belongs to them, streaming into the street, young and old. In silence and raising their voices. All charlie, charlie. Reporter across paris you can see the shock and National Grief in the spontaneous memorials at the offices of Charlie Hebdo, in Prayer Services in services and everywhere, je suis charlie, i am charlie but for frances 5 million muslims, there is fear of a backlash. Mosques have been attacked. We spoke with this man, a leader of the mosque frequented by one of the kouachi brothers. I wont hide from you or fear our religious sites he says. The president has tried to calm things down but because our religion is physically manifested in how we dress, yes, there is a fear. To face down fear for colleagues and loved ones left behind, it is their moment too. Chloe verlhac the widow of the famous cartoonist tignous must raise their four children, the youngest 5 years old alone. She told us we have a duty, we owe it to them to stand up. I have lost the love of my life who is the father of my children but the country has lost an amazing cartoonist. He didnt belong to us. He belongs to the people. So much emotion in the aftermath of these attacks, but the investigation continues, and authorities now say that one of the main suspects, hayat boumeddiene, shes the girlfriend of the man who took hostages in that Kosher Grocery, she has left france before these attacks they believe made her way to turkey and turkish authorities are confirming they believe she made it into syria. George. Okay, terry, thanks very much. So many questions remain, and now we turn to one group claiming responsibility for the attacks, al qaeda in yemen. The terror group has been pummeled by u. S. Air strikes. The groups american born cleric Anwar Al Awlaki was killed by a drone in 2011 but his followers continue to plot and inspire terror. Abcs chief Global Affairs correspondent Martha Raddatz has traveled to yemen several times. She brings us this report. Reporter in the middle of fridays dramatic siege on the two brothers who carried out that reign of terror in this week, one of them, cherif kouachi, boasted to a French Television station that the men had been directed by aqap, al qaeda in the Arabian Peninsula, and that they had been financed by one of the groups top leaders, american born cleric Anwar Al Awlaki. Soon after the deadly siege ended, a top leader of the yemenbased aqap praised the attacks calling france a beacon of blasphemy. A separate statement claiming aqap directed the attack in revenge for the honor of the Prophet Muhammad who the french magazine had depicted in cartoons. U. S. Officials said at least one of the brothers had traveled to yemen for terrorist training in 2011. The fact that he was in yemen getting trained as a terrorist working with terrorists was grounds to arrest him. Reporter this weeks deadly attacks by the french terror cell carries on aqaps efforts to strike western targets with the Group Directly involved in previous attacks on the u. S. Including the attempted bombing of a u. S. Airliner bound for detroit on christmas 2009 by socalled underwear bomber Umar Farouk Abdulmutallab who had been trained by al qaeda in yemen. I traveled to yemen just days after the attempted bombing visiting the school where abdulmutallab came to study arabic before being equipped with his explosives. This is the third floor room where abdulmutallab spent most of his time while he was at the institute here in yemen, just a bed, a desk, a closet. And even with the americanborn al awlaki killed by a u. S. Drone strike in 2011, the cleric continues to inspire attacks in the u. S. And europe. Aqap remains a lethal threat and a terrorist network that continues to threaten not just the region but the west. And Martha Raddatz joins us now. Martha, we just heard admiral kirby say that aqap remains a lethal threat despite what you pointed out as about 100 air strikes by the United States against aqap. What exactly are they capable of right now . Reporter well, theyve certainly been degraded over the years but still considered very capable, very dangerous. There are still Training Camps operating in yemen and clearly as we said, Anwar Al Awlaki is viewed as a martyr by some in the group, and they use him to inspire others to carry out attacks, but still the u. S. Very concerned about aqap and any kind of attack they could carry out, and they could do almost anything, george. Thanks, martha. We are joined now from paris by the u. S. Attorney general, eric holder. Mr. Attorney general thanks for joining us this morning. Weve heard about this concern, aqap still a lethal threat. Good morning. Good morning, and we also have this new video out this morning where coulibaly, one of the gunmen, appears to be pledging allegiance to isis. What more do we know about which group may have been behind this attack . Well, at this point we dont have any credible information that would allow us to make a determination as to which organization was responsible. I think its clear that both organizations pose a threat to the United States, as well as to its allies. Is there any evidence that any other sleeper cells have actually been activated . Again, i dont think that we have any information that would indicate certainly with regard to the homeland that there is any ongoing threat or any threat that was activated by what we see so tragically here in france. With regard to sleeper cells here in france, that is an investigation thats ongoing and being conducted by our french allies. And the french have said that if they can determine who is behind this, they will retaliate. Will the United States join in that retaliation . Well certainly have to see exactly who was responsible, determine what kind of retaliation would be appropriate. We have certainly worked together quite well with our french allies in a whole variety of ways bringing people to justice who are responsible for these acts is certainly something that we would Work Together with our french counterparts and to the extent there is something more than that, we will certainly consider whatever it is that they would propose, but we stand in solidarity with the french. Mr. Attorney general, do you understand how these gunmen slipped through the cracks . They had been arrested, they had been on the radar of the french yet they fell off and were able to carry out this massacre. Well, you know, these are the kinds of things that we have to do an after action report and try to make determinations about how these events actually unfolded. It is something its something that we have done in the United States as well as we have had to deal with these kinds of incidents. We Exchange Information with each other. We had a good meeting today with a number of interior ministers from around europe. Theres a meeting going on now with World Leaders meeting with the president of france and i think one of the things that we have certainly gleaned from these interactions is there is a greater need for us to share information, to knock down these informationsharing barriers so that we can always stay on top of these threats. One nation cannot by itself hope to forestall the possibility of terrorism even within its own borders. The head of British Intelligence, Andrew Parker of mi5, has been sounding the alarm about this threat. He said al qaeda in syria has been planning mass casualty attacks and added this, my sharpest concern as director general of mi5 is the growing gap between the increasingly challenging threat and the decreasing availability of capabilities to address it. Does the u. S. Share that concern . Do we have what we need to defeat this threat . Well, i certainly share the concern that he expressed about the continued viability and the threat capability that al qaeda and the Arabian Peninsula, especially isil growing poses to the United States. I do think that we have adequate resources to detect these kinds of threats to disrupt plots. But it will really entail a whole of government approach. It means that we have to have our intelligence community, we have to have the Law Enforcement community. We have our state and local counterparts, and we have to have american citizens be vigilant. We have that program of see something and say something. It will take the entirety of the american nation to try to keep us safe. But i am confident that we do have that ability. You said youre not aware of any specific Credible Threats against the United States right now, but youve told Pierre Thomas earlier this year that the entire threat environment is as dangerous as youve seen since 9 11. Is that still the case . Yeah i would say that thats true although there is not a specific credible threat i can point to, i certainly think that the environment has changed over the years. We have decimated core al qaeda and i think we have decreased if not eliminated their ability to do the kinds of things they did on september the 11th. On the other hand, when one looks at what happened here in france with a relatively small number of people and we look at some incidents that have happened in other parts of the world and look at whats happened in the United States we have a very small number of people without huge amounts of planning, without huge amounts of resources inflicting very severe damage. That environment is the one that i was referring to and that environment is still one that gives me great concern, especially, especially those we identify as lone wolves. The french Prime Minister said yesterday that france is at war with radical islam. Is the u. S. At war with radical islam . Well, i certainly think that we are at war with those who would commit terrorist attacks and who would corrupt the islamic faith in the way that they do to try to justify their terrorist actions. So thats who we are at war with, and we are determined to take the fight to them to prevent them from engaging these kinds of activities. Our president has indicated that we will be calling on february the 18th a summit so that we deal with better ways in which we can counter violent extremism and get to the core and come up with ways we prevent people from adhering to, being attracted to this terrorist ideology. We certainly have to work i think in a dual way. We need to confront people who engage in these acts, hold them accountable but have to also somehow come up with a counternarrative that too many people especially young men find attractive. As i said, february 18th the white house will host a summit that i announced at the meeting here today in paris. Finally, sir, on another subject the New York Times reported yesterday that the prosecutors have recommended bringing charges against former cia director general David Petraeus for mishandling classified information. Thats drawn a sharp response from senators john mccain and lindsey graham. They say this leak is a shameful continuation of a pattern in which leaks by unnamed sources have marred this investigation in contravention to fundamental fairness. No american deserves such callous treatment, let alone one of americas finest military leaders. Your response . Well, i cant really comment on what is an ongoing matter, but i will say that i share those concerns expressed by two senators who i have a great deal of respect for. But i also want to assure them and the American People that any investigation that is ongoing will be done in a fair and an appropriate way. So you have not received a recommendation . As i said, i dont want to really comment on what is an Ongoing Investigation but i will say that frequently those things that we characterize as leaks, they are frequently inaccurate, and ill just leave it at that. Mr. Attorney general, thanks very much for your time this morning. Thank you. And we are joined now by the french ambassador to the United States gerard araud. Mr. Ambassador, thank you for joining us this morning. Our condolences for the loss of your french citizens. Were all feeling it here, as well. Several days out now as those marchers gather in paris, has french intelligence been able to determine with any greater specificity if there were any direct terror links between the gunmen and aqap or isis . Good morning. First, i want to say that we have been overwhelmed by the expression of grief, of solidarity of all the americans, you know, from the president of the United States who came to the French Embassy to the ordinary american. Its really the American People who are a compassionate people, indeed. What we at this stage, you know, what we know is that actually the two killers on one side, the two brothers on the other side the guy who attacked the grocery, the Kosher Grocery shop actually were linked in france and one of them said that they had organized their attack, they synchronized their attack, but at this stage of the investigation, its too early to go beyond that. And president hollande has said that the french have actually thwarted several possible attacks in the last several weeks and months. Are you now concerned that there are actually active sleeper cells being activated . Is this threat level continuing . You know, we have to consider the threat that we are facing. You have in europe thousands of young radicals, thousands of them, and, of course, we are a democracy, and you dont arrest somebody because of his ideas. We have in france hundreds of young people who came to syria or who came to yemen and who are getting their military training, so its a very, very specific threat because we dont know when these people are coming back and whether they are coming back, and we dont know whether these radical people are going suddenly to become terrorists. So, for the moment, i dont, you know its simply its very likely, unfortunately, that we are going to face other attempts of terrorist acts. The president of the French Republic has said, we are not over with it. And all of us, the europeans, but also the americans, when president obama came to the French Embassy, he told me, he said, we are all vulnerable. So what do you do . As you point out, these thousands of young men, some women potentially, as well, are woven into the fabric of your society. Your Prime Minister says you are at war with radical islam. How do you prevent this war from being a war against islam . I think, you know, we need a global strategy. On one side there is the military response in iraq and in yemen. We need information sharing. Actually the french and the americans, we are working quite well, but i guess we can improve it. We need working on Law Enforcement, and eventually we need to work with the muslim countries and the muslim people because theyre on the front line of this crisis, the front line because they are the first victims and they are also the breeding ground of the crisis. So i guess that the idea of having a summit in washington in february, which has been announced by the attorney general, is a very good idea, because, you know, in a sense france was not attacked as france. France was attacked as a western democracy, and it could have happened everywhere in europe and, unfortunately, i guess also in the u. S. If aqap in yemen was tied to this attack, if isis and syria was tied to this attack will france attack those groups in those countries . Well as you know we are already actually fighting with the americans in iraq against isil. The french are also fighting against al qaeda in the islamic maghreb, so we are doing our job with our western friends and our u. S. Friends, and as the Prime Minister said, if necessary, well strike back still more. Mr. Ambassador, thanks very much for your time this morning. Thank you very much. And coming up, after tha