Government to raise its terror alert to severe, the fourth highest of all levels. The concern is that insurgents could return from fighting in the middle east to strike at home. We need to tackle that ideology of extremism at home, at root. That means challenging the thinking of extremist ideal logs. We are joined live from london with more specifics about the threat and the u. K. s reaction to it. Reporter well, natalie, a lot of tough talk there by Prime MinisterDavid Cameron, but the actual specifics of any threat, well, very thin indeed. In fact, this terror alert level means that there is a highly, highly probable likelihood of a terror attack. But nevertheless, mr. Cameron went on to say that there was no specific intelligent that any attack was imminent. Now there has been, of course, great political pressure on mr. Cameron to be seen to be doing something. Particularly in the light of growing public concern about those 500plus british jihadys fighting in syria and iraq alongside isis and other jihady groups. And also in light of the video of james foley in which one of the insurgents appeared to have a british accent. That looks to be one of the factors driving this decision now. As far as what it will look like on the streets, we are told that there is going to be an increased Police Presence at airports and railways, and we could even see more armed police on the beat, on britains streets, which is something in britain, that were not too used to. His words, he wasnt kidding around. He said were in the meddle of a generational struggle of ideology that we will be likely be fighting for decades. What is the reaction from lon n londoners that there is apparently a new enemy . Reporter a lot of people are shrugging their shoulders and saying why now because weve known of the threat from radical islam for a number of years now. Weve seen homegrown terror attacks on british soil, and weve known about britains heading off to join these extremist groups in iraq, afghan sc stan years before that. But some are saying that its time that we got to grips with radical islam here in britain. Some feel theres been a feeling of Political Correctness and thats why they havent driven down on the problems at the core of a lot of muslim communities. Of course those that are born and bred as muslims are saying maybe this will be another problem for us. Maybe police and Security Forces are going to use any new measures imposed by mr. Cameron against us. A lot of these communities feel discriminated against and feel that this could be another thing against them. Things like withdrawing passports for british nationals who are heading off to conflict areas of the globe and also possibly putting travel bans on them before they can set off, natalie. All right, well, well find out much more next week if he makes these announcement. Thank you, carl pithall. Authorities are not aware of any specific credible threat on u. S. Soil. Heres cnns rene marsh. Reporter as britain raises its Terror Threat level to severe, the u. S. Says its working to track foreign fighters who travel in and out of syria. And the u. S. Is continuing enhanced Aviation Security measures at overseas airports with direct flights to the u. S. We now have to make sure our mobile phones, laptops, they can see that its charged. Reporter since this summer, fliers from middle east and european airports bound for the United States have had to power up all Electronic Devices to prove they werent explosives. Intelligence had suggested that terrorist were developing more sophisticated bombs to avoid airport screening. In the u. K. Today, a clear sign that they are worried about foreign fighters returning. We are stopping suspects from traveling by seizing passports. Were depriving people of citizenship. Reporter the u. S. Is striking a similar tone after two americans were killed fighting for isis in syria this week. We have the prerogative at the state department in kwoord nation with Law Enforcement authorities to revoke passports when it comes to a point where someone is working with a terrorist organization or posing a threat to the american public. Reporter no fly lists are updated and sent to tsa in real team as threats develop, but its not a perfect system. Moaner moham moaner mohamed abu sal law was not to be seen again until he blew himself up in a Suicide Attack in syria. We know there are going to be questions. The real concern is the sleeper cell, somebody is under the radar. Reporter the 14 million americans taking to the sky this weekend may see heightened security already in place because of the busy labor day travel. But more security is being considered, and not all. Of it will be visible. I dont anticipate there is a change to that level. Reporter the u. S. No longer uses a colorcoded threat system. They stopped that in 2011 because it was confusing. Rene marsh, cnn, washington. U. S. Secretary of state john kerry is urging a global coordinated effort to defeat isis. In a column, kerry says no decent country can support the horrors perpetrated by isis, and no civilized country should shirk its responsibility to help stamp out this disease. Kerry writes that Coalition Building is hard work but extremists like isis can only be defeated when responsible nations and their peoples unite to oppose them. Well, the u. S. Military has shed more light on its operations against isis in iraq. The pentagon said friday American Forces have carried out 110 air strikes since august 8. That includes missions conducted that same day on isis fighters near the mosul dam. Meantime another migfight is un way in iraq. Lets go live to baghdad. I believe were talking about fallujah . Reporter natalie, if you recall back in january, this was the first city to fall to militants, but since then they have been bombarding it on a daily basis. Air strikes and what some Rights Groups say is the use of barrel bombs. These are claims that the Iraqi Government categorically denies, says its not true, not targeting its own people the way its targeting what they call these terror groups inside fallujah, but they are paying the price for this battle between the armed groups, between isis and the Iraqi Government. As a result of this shelling, were told yesterday 18 people were killed and 75 were wounded. Extensive damage to peoples homes. And over the past few months weve seen thousands of families flee this bombardment that happens on a daily basis. This shelling. And the government insists that its not doing so, but we see images like what came out of fallujah yesterday where people are paying the price. President obama would hear the administration urging the Iraqi Government, the shia led government here to reach out to the sunnis, to try really hard to regain their trust after all these years of what sunnis feel marginalization and persecution by Security Forces. Images like these, what is going on in fallujah shows that there is little being done to win the hearts and minds of sunnis at a time like this. Instead, it seems to be increasing those sectarian rifts. With all of this fighting swirling around baghdad and the world now just condemning isis and its goals and its tactics, of course, what, certainly, the people of baghdad are quite hardened because theyve been through so much for so many years. But what is the mood there . Reporter its always tense in baghdad. People always say when its quiet, its the calm before the storm. Theyre worried about what may come. Its always the resilience of the iraqi people thats striking. Its how this violence has become a fact of life. And just a few days ago we visited a mall in baghdad, and heres what we found. This is hardly the image that comes to mind when you think of baghdad, but over the years Entertainment Centers like this one have opened up in the capital, providing people with sort of an escape from their daily lives. Most in baghdad live with a few hours of electricity per day. Some are here because being at home is just unbearable. And the mall has power. But most are here because its a place which people can comfort themselves because of the conditions of the terrorists. We want to have fun here in iraq, you can just visit this place. Nothing, and theres no other places. You know, little safe here. Reporter safety in baghdad is relative. Even the mall has been targeted. A few months ago, a car bomb was detonated. If we explain the situation here, we would lose hope and get desperate. Life must go on. Reporter for iraqis, violence has become a fact of life. The fear is of the unknown. Translator when my husband goes to work, until he comes back i live in fear. I pray he does come back. Reporter and natalie, while this mall provides people with a venue of normalcy, normal has really taken a whole new definition in iraq over the past ten years. People in the mall we spoke to said they really fear what the future may bring, even if its as soon as they walk outside the mall. They still understand theres no concept of normalcy after all theyve been through and now this. Still ahead, russnato warps russia to say out of ukraine. But is anybody listening . Plus the latest from iceland where a volcano is erupting. Well tell you where alerts stand right now. Take a look at smoke rising on friday from a volcano in iceland. Officials say it has not produced any significant ash products. Thats good. As a result, the aviation warning has been lowered from red to orange. All airports are open as well. And its not the only volcano were watching. How many . Four. Japan just got involved. So well start with iceland and work our way through the volcanos here and eventually well do some weather, too, in the next half hour. But for now were in volcano mode here and start in iceland. And this would not be getting that much attention if we had not had the event four years ago which, of course, paralyzed european airspace. That is not happening now because we have a different kind of eruption. We are now back to orange, which is good. Red is the bad one. That is when were talking about imminent eruption and air delays. Alert level, back to orange. We were under alert on friday because what we had was an eruption but a fissure eruption. Were going to continue to monitor that volcano. But it looks pretty quiet right now as ive been watching it. But as we fly you close to the equator, what were looking at is the papua, new guinea volcano. Its way more impressive than in iceland. This is down further south. No glaciers here. And we dont have to worry about a widespread air travel situation. But look at that. Can you imagine watching that out your window . A lot of people were, and they were sending the pictures along with it. There you see some incredible images. And behind me, some more spectacular images. Look at this one here. That is just, look at that with the sun there, postcard perfect, but scary stuff as well. Of course, if you are if you live anywhere near by, and theyve been evacuating some folks. This one has caused air traffic disruptions, because were involving indonesia as well as some delays as well. Although most of the activity has been across papua, new guinea. The pilots will certainly be aware of this. But unlike iceland, we dont have the danger of the jet stream picking this up because subtropical jets to the south. And to the north, what well have is just this ash disbursed over the region, and that is just fine with us. And then we have this other volcano here, mayon, which is an alert. This is an alert two here. So were watching this one for potential eruption. We do have a lot of People Living around here, 182,000 to be specific. And the japan one, which well get to at some point as well. I dont remember when weve had so many volcanos. Its almost volcano season. Incredible. Thank you, ivan. The skies could get a lot more crowded if google gets its way. Google is the latest company to bet big on drone delivery. The Search Engine is looking for new engines of growth. Reporter hear that . Its the building buzz of potential business by drone. Can i order some dog food for my dogs, please . Reporter and now, google has announced its latest aspiration, a Drone Delivery Service for anything from dog streets to first aid kits. Project wing aspires to take another big chunk out of the friction of moving things around. Reporter moving things around, mainly products to paying customers, is something google is looking to streamline. It may seem like a strange move for google which has built its empire around searches and maps. They want all these little pieces working on your behalf. Reporter goolgle is no strapgser to expansion, like the driverless car prototype. Google wants to transform the world, quickly delivering medical supplies and other goods to people in hardtoreach services. The post office changed society. Fedex changed society. So dont we think that being able to get you a package in two minutes would also change society . Reporter this time google is already a bit behind. Amazon introduced their prototype last december. And dominoes pizza tried their own in 2013. The coast guard already uses them for surveillance of ice sheets in alaska. And they have been used to survey the damage after an earthquake struck napa, california. Technical and safety issues have to be addressed first. They want to fully integrate drones into the National Airspace by september 2015. Cnn, washington. And ahead here. Fresh claims of largescale russian incursions ukraine. Well go live to kiev when we come back. Its one of the Fastest Growing crimes in america. Theres a new victim of Identity Theft every three seconds. Makes you wonder am i next . One weak password could be all it takes or trusting someone you shouldnt. Over 70 million records with personal information were compromised in recent security breaches. You think checking your credit cards or Credit Report protects you . Of course, lifelock can do that for you. But lifelock also helps protect you from more serious fraud, like attempts to get a mortgage in your name. Take over your bank accounts, or even drain your investment accounts. Lifelock offers the most comprehensive Identity Theft protection available. Alerting you to threats by text, phone or email. 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A British Government source says there are 4,000 to 5,000 Russian Troops inside ukraine with 20,000 more massed along the border. That figure is far higher than the u. S. Estimate of just 1,000. And these satellite images are said to show russian equipment in ukraine as well. Nato secretarygeneral spoke about that friday. Despite moscows hollow denials, it is now clear that Russian Troops and equipment have illegally crossed the border into eastern and southeastern ukraine. Well, now russia says those satellite images are really pick it tours from a video game. President Vladimir Putin is suggesting russia is not a nation to be trifled with. Translator i want to remind you that russia is one of the most powerful nuclear powers. Its not words. Its reality. And more over, we are strengthening our nuclear force, strengthening our armed forces m they are definitely more compact and more effective. They really are more modern. Were covering all these developments. Were joined from kiev. And Vladimir Putin is certainly turning up the heat. Of course they deny it, but with troops, apparently, and with his words. Reporter yeah, natalie. I think both sides turning up the heat with the rhetoric here in kiev as well as moscow. Weve seen a lot of turning points in this conflict. And you get the sense were in the middle of another potential turning point. And where this conflict goes from here depends a lot on what happens today and the coming days. Not just on the battlefield but politically and diplomatically. Lets update you on all those fronts, starting on the battlefield. Were continuing to watch very closely allegations and accusations coming from kiev, now from the u. K. That the russians have sent troops, heavy artillery, armored trucks into the ukraine. Its important to point out that its impossible at this point for cnn to independently var pie that thats the case. And overnight friday into today we didnt see any activity that would suggest indeed there is a fullscale invasion by the russians into ukraine. Were also watching closely to see if indeed prorussian rebels, seb rattists are going to make a move on the all important city of mariopol. If they indeed continue to push west and take territory towards crimea, that would suggest that the russians are indeed looking to create some sort of land link between the russian border and the crimean peninsula, an area that they annexed several months ago. We should point out overnight into today, no activity that suggests there is an incursion into mariopl. Today all eyes on brussels where eu representatives are meeting to discuss the crisis in ukraine. Theres no indication that three will be announcing sanctions. But certainly after the allegations of an incursion, youre hearing more representatives saying that sanctions are the path to go. So a lot happening in kiev, southeastern