Beheading of three americans. Tonight Mark Phillips in london tells us who he is and what we know about him. Reporter hes the masked face of isis in all its brutality, and now he has a name. The executioner nicknamed jihadi john, who figures in at least five gruesome beheading videos, is really mohammed emwazi, a 27yearold College Graduate from london. His accent was first hint. This is james foley, an american citizen of your country. Reporter for months as isis romped across syria and iraq, british and american antiterrorist officials were known to be aware of the masked figures identity, but they refused to release this presumably because they were trying the trace his links to other isis figures. Armed with a Computer Science degree from londons westminster university, emwazi was already on the Security Services radar. When he flew, he said for a vacation, from london to tanzania in 2009. There he was stopped by british and local officials who accused him of trying to go to somalia to join the alshabaab militants. He was sent back to amsterdam for more questioning before returning to london. And while he lived in this house with his family, he was watched until 2012 when he disappeared and showed up with isis in syria, where he became the man with the knife and in Islamic Militant circles something of a recruiting tool. Terrorism expert shiraz maher. Hes become a huge character to fan boys and fan girls that support the Islamic State virtually. So jihadi john is a celebrity to them. Reporter some even tried to justify his behavior. Asim qureshi a group the deals with people under antisurveillance, says that he knew emwazi and that he became radicalized because he was harassed. He was such a beautiful young man. Really. You know its hard to imagine the trajectory. Reporter for the families of isis victims its hard to imagine the horror, even when it has a name. Mohammed emwazi has been identified scott. Victims families are demanding justice. Pelley mark fill phillips in the london newsroom. Mark thanks. In the u. S. , police are tracking a terrorist who is influencing followers from his home in michigan. Jeff pegues looked into how social media is inspiring jihad. Its very easy to go on youtube. Reporter Ahmad Musa Jibril is a palestinianamerican cleric whose extreme views caught the attention of u. S. Law enforcement. His alleged call for jihad in 2005 led federal prosecutors to describe him as man who encouraged his students to spread islam by the sword, to wage a holy war and the hate and kill nonmuslims. In 2012, he was released from federal prison after serving six years for insurance fraud. Hes currently living in dearborn michigan where hes on probation. Even under Law Enforcement supervision, hes become one of the most influential figures for western foreign fighters. According to british researcher peter neumann. He countered their likes their mentions, their follows and what would turn out to be true is that Ahmad Musa Jibril is like an astonishing percentage of foreign fighters. Reporter according to research, 60 of west everybody foreign fighters were following him on facebook, favoriting his tweets and retweeting his messages. Last year a federal judge heavily restricted jibrils ability to use social media. As a result, his accounts have gone dormant and yet his Facebook Page has grown from 211,000 likes last year to 245,000 today. There were hundreds, maybe even 1,000 messages i got from social media. Reporter jibril declined our request for an interview. His probation ends in one month. Without new charge hes free to go back online without restriction. Hes toned down his rhetoric. That suggests maybe hes changed man. Some arent convinced. Theres nothing to suggest that he has changed his views. Hes toned them down because he realizes that if he doesnt tone them down, they will come after him. Reporter and this is the dilemma that Law Enforcement deals with every day in this country, how best to identify potential threats who may mask their true intent but scott social media can also help Law Enforcement. It can give important clues about who and where extremists might be. Pelley jeff, what are some of the things the f. B. I. Does to monitor these people that they dont have any reason to arrest . Reporter well, scott, in the early stages it could be as simple as monitoring social media. Thats something that could escalate to monitoring emails texts and phone conversations. All of that under court orders. The f. B. I. Looks at hundreds of people who may have terrorist leanings and opens investigations into some of those cases. Now, the f. B. I. Director just yesterday confirmed that the bureau has now opened investigations in all 50 states. Pelley but after Edward Snowden there has been a lot of concern about government surveillance. I wonder what intelligence officials are saying to themselves . Reporter well, scott, Law Enforcement has been very, very public about the damage they believe Edward Snowden caused to intelligence gathering in this country. The director of National IntelligenceJames Clapper has said that snowden caused significant damage a significant blow to National Security by exposing and compromising intelligencegathering tactics. Pelley jeff pegues in the washington newsroom tonight. Jeff, thanks very much. As if they were finding new ways to express depravity today isis posted video of an attack on a museum in mosul. Iraqs second largest city. The militants took hammers and drills to sculptures and statues, calling them blasphemous. Some of them were blaster copies, but others dated back to the 7th century bc. In a syrian winged ball, part of the wall of neneba had stood for thousands of years. Parts of the sun belt had another snowy day today. Folks in red bank, tennessee woke up to more than half a foot. North folk virginia, got eight inches and they had to get the earth movers out. Across the south this morning more than 180,000 homes and businesses were without power most of them in the carolinas where we find vinita nair. Reporter this is the scene above durham after last nights storm. Four inches of snow fell in this part of the state, even more in the hardesthit regions of the south, enough to snap tree limbs and fracture power lines. Today crews were dealing with the cleanup like this utility pole that splintered under the heavy weight of the snow. Can you tell me when the power will be back on . Jay simmons is directing part of the 1,000person emergency team, helping to restore power. Hes on a 16hour shift. Thats a big storm anywhere, 200,000 people, but hopefully a lot of the problem will just be the freeze trees and we can clear them. Reporter Coleman Brown is with the Durham Department of public works. The snow was coming down so hard, it was really difficult for us to keep up. Reporter last nights storm coated the south in snow and ice from georgia down to texas inch lubbock icy roads caused this vehicle to flip. In tennessee drivers were stranded on i24 for hours overnight. More than in north carolina, the roof of a stable buckled trapping the horses inside. Here in henderson, they also have plenty of cleaning up to do, including the roof of this newly renovated gas station, which also crumbled under the weight of the snow. Scott, throughout the region, conditions improved significantly, which would be great news if it wasnt expected to freeze again here tonight. Pelley vinita nair covering the big chill for us. Thanks very much. This was a rare sight off of massachusetts. Waves of slush washed ashore on nantucket island. The water temperature there is below freezing, but sea salt and the motion of the ocean are keeping it from going solid. One thing heating up today is the race for the white house. Republicans are auditioning at the annual conservative Political Action conference in maryland cpac for short. Our nancy cordes is there. Reporter there are few places besides a debate stage where you can find every single g. O. P. Hopeful. But cpac is one of them, an annual gathering of thousands of conservative leaders and activists. Texas senator ted cruz is right at home here. Obamacare is a train wreck. And thats actually not fair to train wrecks. Reporter for new jersey governor chris christie, its chance to convince sceptics that hes further to the right than they think. Im prolife. I ran as a prolife candidate in 2009 unapologetically. I spoke at the prolife rally on the steps of the statehouse and vetoed planned parenthood funding five times out of the new jersey budget. Reporter winning over this crowd is critical because they reflect the views most of g. O. P. Primary voters inch a recent cbs news poll, 65 of prints republicans nationwide identified themselves as conservative including onethird who said they are very conservative. Former Texas Governor rick perry and all the rest insist theyre still testing the waters. Where are you in your deliberations . Were just. Thats a good descriptive term, just a good deliberating. Reporter wisconsin Governor Scott walker, who has surged in recent polls got the biggest reception today. The biggest challenge to that is just up the way just down the river up the potomac to washington, or as i like the call it, 68 square miles surrounded by reality. Right . Reporter former Florida Governor jeb bush has the most to prove when he addresses this conference tomorrow. Early polls show him struggling a bit among conservatives scott, in part because of his support for Immigration Reform and those common Core Education standards. Pelley nancy cordes for us tonight, nancy, thank you very much. In washington, there was an historic change today. The fcc voted to make the internet subject to federal supervision. The result, big broadcasters leer comcast and verizon will not be able to sell content providers like netflix faster Data Delivery service than everyone else. Lawsuits are next. Faster ports are desperately needed in long beach california, tonight. A labor dispute was settled last week, but the hangover it caused is epic. Omar villafranca is in vernon, california, tonight. Omar . Reporter scrap metal at this recycle center usually ships out in three days. Containers of aluminum like this have been here for a month and up the coast recycled paper is taking up prime real estate on the San Francisco waterfront. 700 tons of trash day is sorted at San Franciscos recycling center. It keeps coming in but not going out. Thousandpound paper bales are piled sky high. Spokesman robert reed says the mountain has moved into the parking lot. Because were having trouble shipping it, were storing it. Were baling it and then were stacking the bales five high until were able to get them on the ships and moving again. Reporter the bales are sent to asia and remade into everything from cereal boxes to stationery. Exporters arent paid when the goods are stuck in port. The worst day is when you tell somebody, i dont know how youre going the feed your family. Reporter at his familys scrap metal business in los angeles, doug kramer cut back hours and benefits. It wasnt enough. Weve cut employees which is incredibly painful to do. Reporter do you worry that your overseas consumers may be looking elsewhere . We know theyre looking elsewhere. The Global Supply chain is not going to stop because the u. S. West coast ports are screwing around. Reporter there is a two to threemonth backlog at the port that kramer uses. Scott, this business has been in his family for three generations. Hes worried there wont be a fourth. Pelley Omar Villafranca reporting for us tonight. Omar, thanks very much. This is cool. A warship of the future hit the water today. The uss gabrielle giffords. It is a new class of trimaran capable of hitting 51mph. Giffords is the former congresswoman who survived massacre in 2011. She posted this picture. Her ships official launch will be in august. Reefer madness in the Nations Capital as pot becomes legal. Or does it . And a look inside an erupting volcano when the cbs evening news continues. Low magnesium, and vitamin b12 deficiency. Side effects include headache abdominal pain and diarrhea. 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And keep being their favorite playmate. With tenas unique super absorbent micro beads that lock in moisture and odor. Tena lets you be you. Pelley washington, d. C. , is fuming over marijuana. A law allowing Recreational Use went into effect today but some members of congress are threatening to have the mayor arrested. Heres julianna goldman. Reporter this man didnt waste any time. As soon as it became legal the man who led the effort invited the press over the watch as he smoked a joint in his d. C. Home. It feels great. It feels like freedom. Reporter in november district votedders overwhelmingly approved initiative 71, which allows adults to grow up to six plants and carry up to two ounces of pot. Its still illegal to sell the drug or smoke it outdoors. But some republicans in congress say its all against the law. Marylands andy harris. If you live in the district of columbia, under the United States constitution, you live under the jurisdiction of congress. Congress has the final say. Reporter in december, Congress Prohibited the city from spending any money the legalize pot but d. C. Mayor Muriel Bowser says the voters had already spoken. So we would encourage the congress to not be so concerned about overturning what seven out of ten voters said should be the law in the district of columbia. Reporter two members of the House Committee that oversees the district told the mayor shes in willful violation of the law and demanded names of employees who worked on the initiative. Theres up to two years prison time, you lose your job there are fines involved. Its a serious violation because its taking taxpayer money and spending it for Something Congress says you specifically cant spend taxpayer dollars on. We believe were acting lawfully. So i have a lot of things to do here in the district of columbia,. Me being in jail wouldnt be a good thing. Reporter as for jail time, it would be up to the attorney general to prosecute. Thats unlikely in a democratic administration. Now, scott pot isnt legal in all of d. C. Its still prohibited on federal lands including all the monuments and museums. Pelley the district joins three states with Recreational Use now. Julianne narcotics thanks very much. Will a suspended nfl star get back on the field . A judges decision next. Konohito. And this guy. Who knows a guy. Hey guy. I know a guy in new york, vegas, dallas. Ive known some guys for decades and some, nice to meet ya, lets deal. My competitors may know a guy, but i know over 60,000 guys. And gals. Exclusive hotel deals up to 60 off. Priceline. Com toenail fungus . Dont hide it. Tackle it with fdaapproved Jublia Jublia is a prescription medicine proven to treat toenail fungus. Use jublia as instructed by your doctor. Once applied jublia gets to the site of infection by going under, around and through the nail. 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They captured the sea of lava boiling at 2,000 degrees. Two of his drones were lost. There are more than 80 islands in the vanuatu chain. Today the American Kennel Club put out its annual list of the most popular dogs. A beagle won the westminster title, but the breed fell to fifth place as the bulldog moved up to number four just behind the friendly golden retriever. The courageous German Shepherd is number two and for the 24th straight year, the lab doir Labrador Retriever is number one, which brings us to this question who let the llamas out . Well cut to the chase next. This portion of the cbs evening news is sponsored by cbs health, because health is everything. So we quit selling cigarettes in our cvs pharmacies. Expanded minuteclinic for walkin medical care. And created programs that encourage people to take their medications regularly. Introducing cvs health. A new purpose. A new promise. To help all those wishes come true. Cvs health. Because health is everything. 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Its red, white and blue. Log on to learn more. It may seem strange, but people really can love their laxative. Especially when its miralax. It hydrates, eases, and softens, to unblock your system naturally. So you have peace of mind from start to finish. Love your laxative. Miralax. Pelley the journalists around here are worldly, so breaking news that stops this newsroom in its tracks is very rare, but it happened today. These are pictures of the evening news editorial meeting captivated by live llamas on the lam in sun city, arizona. Of course we assigned one of our most experienced correspondents, dean reynolds. Reporter you really have to sympathize with a posse of wouldbe captors who try to deal with this pair. How do you catch a 350pound llama must have been the first question on their minds. The Maricopa CountySheriffs Office confirmed to cbs news that officers here had never had to deal with wayward llamas before, and that became abundantly clear as they launched their pursuit with all manner of hand signals and gestures, which the llamas basically ignored. Many misdirected attempts to lasso the animals what else would you use came next before they were finally caught, out of breath but unhurt. Its safe to say the folks at sun city have seen few afternoons like this one. According to authorities, the llamas had an appointment at the assisted Living Community as therapy animals, but they apparently thought better of the idea when one of the retirees got a little fresh at least thats how bob their handler explained it. What happened . What did you guys do . We took them to an elder home. We were letting them pet her. One of the older gentlemen wanted to petter and she broke loose and then the chase was on. Reporter how long was the chase . Two and a half, three hours. We have breaking news to report. There are lamb mas loose in sun city arizona. Reporter in any case, the llama drama was soon broadcast across the country and within minutes, twitter exploded in a hail of arizona hashtags. The Arizona Cardinals offered the elusive pair oneyear deals and 2,400 pounds of hay each. We dont usually offer hairk but for these two we had the make an exception. Pelley thats our news roundup for tonight. For all of us at cbs evening news all around the world, good night. Captioning sponsored by cbs kanye on a table. Madonna tumbles off stage. Sam smith. Perhaps overserved. Welcome to the brits. The british version of the grammys got even crazier than ours. Its an amazing show. Who is slamming madonna after her nasty tumble . And see how the madness continued after the show. Of course, kanyes involved. Plus, did ed and sams after party go off the rails . I enjoy really going for it in parties. Then tracy morgan. New video of his recovery. It is the finale of how to get away with murder. The cast is here to catch you up on the season real quick. And we investigate the kid