Is nbc nightly news. Reporting tonight, lester holt. Good evening. It has happened before a deadly terror attack on a crowded modern shopping mall. And so it might be hard to dismiss entirely out of hand a new threat issued by the Terror Group Al Shabaab that identifies major mall as by name inside and outside this country as targets. As it often does in these cases, the u. S. Governments walking a careful line here insisting tonight that theres no specific credible threat while at the same time urging the public to exercise heightened awareness. Its a threat especially hitting home in minnesota. Nbcs Kristen Welker is outside the famous mall of america, one of the threatened targets with more for us. Kristen. Reporter lester good evening. Shopping traffic has been steady here at the nations largest mall despite that video calling for an attack here. The white house today insisted that there is no plot that they are aware of. Still this latest threat has sent shock waves through this community and the rest of the country. Inside the mall of america this afternoon heightened security increased patrols, bomb sniffing dogs and a Team Monitoring social media. Is the mall of america safe . Yes. Reporter you have no reservations about people coming to shop here . I believe its a safe place to be. Reporter federal officials issued a bulletin today to local Law Enforcement calling for increased vigilance at malls across the country in response to somali based Terror Group Al Shabaabs threat against western malls, specifically the mall of america. Homeland security secretary jeh johnson. Im not telling people to not go to the mall. I think that there needs to be an awareness. There needs to be vigilance. And, you know be careful. Reporter today, the white house called the video pure propaganda. Terrorism experts say the main concern now. The primary fear is that a lone wolf inspired by this announcement would go ahead and pick up a weapon and take it in a mall and start shooting it up. Reporter al shabaab carried out the attack against the Westgate Mall in nairobi, kenya in 2013 a massacre that claimed nearly 70 lives. Law enforcement Officials Say al shabaab has longtargeted minnesota, home to roughly 39,000 somalis for recruitment. Today, Community Leaders denounce the threat and said theyre reaching out to young people. This is not islam. This is not american. This is not somaliamerican value. Reporter meanwhile some shoppers were concerned. Im very uneasy about the threats. Reporter federal law enforct Officials Say the old rules still apply. If you see something, say something. And their Investigation Continues tonight. Lester. All right, kristen, thanks. And as malls step up security based on these new threats, believe it or not at the very same time theres a big fight erupting in washington over the money to fund homeland security. And will democrats and republicans will argue and blame each other, that money is set to run out this week. Our senior White House CorrespondentChris Jansing is digging into the details. Reporter for 200,000 essential employees, an excruciateing wait to see if congress will fund the department of homeland security. Tsa officers at airports Border Patrol and customs agents coast guard, fema workers and secret service agents. Overall 80 of workers would still have to show up if congress doesnt fund dhs, but they wont get paid. Today, president obama made an appeal to the nations governors. It will have a direct impact on your economy. And it will have a direct impact on Americas National security. Reporter 30,000 more workers, mostly office staff, will stay home. Fema for example, would stop sending checks to rebuild from natural disasters. Those funds that are for those disasters will still be there, but the people required fo actually make those payments to oversee that will not be there. Reporter with the clock ticking, late today another senate debate. But no resolution. Now, critics charge the white house is overstating the threat to National Security just to put pressure on congress a charge the white house denies. We have just learned Senate Republican leaders are working to find a solution to end this standoff. Lester stay tuned. Chris jansing, thank you. Meantime, much of the country continues to be caught in the grip of this relentless brutal deep freeze. Now all the way south to texas where much of dallas is like a ghost town paralyzed by icy roads. Nbcs ron allen is there. Reporter a massive 25vehicle pileup blocked this texas interstate highway as an entire seasons worth of sleet and freezing rain up to two inches, fell in a single day. Wreaking havoc. Dozens of accidents reported one motorist killed. The icy bonechilling wintry mix shut down just about everything. This is the heart of the city its the middle of the day. Everywhere you look things are pretty empty. And everywhere things are frozen. Sam and janet dixon only stepped out to walk their dogs. Theyre not liking it too much. Reporter winter storm warnings and watches stretched some 2,000 miles across the u. S. From california to the carolinas. Snow on the ground in every state except florida and hawaii. Record lows in cities like cleveland, 5 below zero erie minus 7, and marquette, michigan 28 below zero. Some schools closed in 21 states. In tennessee the storm has been deadly. At least 22 people have lost their lives. Thousands still without power. In New Hampshire dozens of residents forced to evacuate after the roof of this apartment complex collapsed. Ironically in alaska where the weathers been too warm a 2,000mile sled race splashed through the slush where there wasnt enough snow. You need to get me to the hospital right now. Reporter in the midst of all this treacherous weather, near denver this family welcomed a new baby boy in the backseat of their car after the hospital said it wasnt time yet and they got stuck in the snowstorm. Just screaming. And i reached over real quick and he just came right out. And i caught him in my hands. Reporter back here in dallas they call this massive interchange the high 5. Its usually bumper tor bumper one of the busiest roadways in the state, but not tonight because the roadways are still so icy and treacherous. Were hearing more than 100 schools will be shut here again tomorr weather nightmare in dallas endures. Lester. Ron allen, thank you. Want to bring in meteorologist janice huff now. Its unending. Its winter we know that. But this is getting almost ridiculous. Is there any letup . Any relief in the forecast . Not for a few days. The next system that comes through this area will be all rain. But for now this system has moved out of texas and ice is going to be collecting on power lines, roads and trees across parts of louisiana, mississippi and arkansas. Even parts of alabama and georgia as well. By tomorrow morning were expecting some snow in and around the atlanta area as well as some ice that will move into the mountains of north georgia, North CarolinaSouth Carolina and tennessee. And then it continues east later on Tuesday Morning for places like columbia, charleston maybe wilmington North Carolina and the outer banks of North Carolina may see some snow as well. In the northern states its the brutal windchills. It continues wave after wave after wave of cold as minus 30 over the next several days into thursday. It just wont let up, lester back to you. Janice thank you. New hope tonight for families worried about peanut allergies. Two reports indicate new breakthroughs going against conventional wisdom by carefully exposing kids to peanut proteins. In one report researchers gave small amounts of proteins over time to babies deemed at risk. Those who already have eczema or egg allergies. Five years later the risk was significantly lower for 80 of them. In the other report kids with peanut allergies were able to tolerate small amounts of proteins after using a new type of skin patch. Now to an nbc news exclusive. The family of Kayla Mueller, the Young American woman killed while isis held her hostage, sitting down with today savannah guthrie. Theyre opening up about her life the devastation brought by her death and their agony over the belief that the u. S. May have missed its chance to get her back alive. I hope i never forget that everything happens for a reason. Reporter 26yearold aid worker Kayla Mueller was passionate and fearless. I dont know where she got the courage to do the things that she did, but thats who she was. Reporter in spring of 2013 kayla traveled to turkeys border with syria to work with refugees. What would she tell you about what she was doing and what it meant to her . Kayla did not give us a lot of detail. Reporter she was protecting you . Yes. Very much so. Reporter she knew the risks. Yeah she definitely knew the risks. She wasnt she didnt go in blind. Reporter but that summer unbeknownst to her family kayla went inside syria with her syrian boyfriend. Days later her parents got the call they dreaded most. It was at 5 00 a. M. On august 5th. And they said that she had been detained. Reporter they learned kayla was in the custody of isis. I really feel that we had a chance to get kayla out. Because we were in communications with them unlike the other families. But how do you raise 6. 2 million . And, you know pretty much made it impossible. But we feel they really did want to release kayla. Reporter the muellers say kayla never would have wanted isis to profit. Do you feel our government did enough to help you help her . I think they wanted to. But i think, again, the policy and i dont think anyone had any idea this group would be as powerful as they were. Reporter last summer u. S. Special forces attempted a daring secret rescue of kayla and other western hostages but by the time they arrived the hostages were gone. The rescue attempt and theres been some reporting that some people involved in it felt like they were too slow to approve it. That washington kind of dragged its heels a little bit. Yeah. I mean theyre so cautious about getting actionable intel. You dont want to put soldiers in harms way without knowing exactly the circumstances. But, yeah i think they waited too long. We had an idea where they were. And it was 30 days i think, before they took action. Reporter the rescue effort unsuccess unsucces kaylas family could only watch as one by one the other hostages were brutally executed. There were also reports kayla may have been forced to marry an isis fighter. Do you think thats true . I have no idea. I dont know. But i just know that she was doing the best she could to stay alive. That i do know. Because she wanted to come home desperately. Reporter but it wasnt to be. Earlier this month isis confirmed kaylas death. I became an only child that day. And thats hard. Its really hard. The kayla i remember is just a little sister playing in the backyard. Thats what i miss. Ill always love you. She changed our lives direction. I think thats what ill remember about kayla other than my little girl. Savannah strong people. Hard to imagine what theyve been through. Let me ask you about this rescue attempt. What does the government say about the timing and the speed . Well they have heard this criticism that perhaps washington the administration was slow to approve this rescue mission. What they say is by the time it got to the president s desk it was approved with warp speed, to use their words. But it was very quickly looked through, especially for such a dangerous and complex operation. And to be clear the family has its criticisms but they understand what a difficult situation this was for everybody involved. And theyre not focused on something they call kaylas hands. Its a new foundation and they hope to be able to raise money and continue the work she cared so passionately about. Savannah thanks for sharing their story. Appreciate it. Warnings about what may be a toxic batch of a party drug known as molly after a dozen people were hospitalized in connecticut over the weekend, most of them students at wesleyan university. Two said to be in critical condition. Officials are looking for the source of the drug reportedly distributed to students on campus saturday. A lot more to tell you about. Emergency calls ending in tragedy. When every Second Counts to save lives, the stunning reason 911 operators are having trouble getting help in time. And instead delivering powerful messages and touched some nerves. Meet the worlds newest Energy Superpower. Surprised . In fact, america is now the worlds number one natural gas producer. And we could soon become number one in oil. Because Hydraulic Fracturing Technology is safely recovering lots more oil and natural gas. Supporting millions of new jobs. Billions in tax revenue. And a new century of American Energy security. The new Energy Superpower . Its red, white and blue. Log on to learn more. Nexium 24hr. Its the purple pill. The 1 prescribed acid blocking brand. Available without a prescription for frequent heartburn. Get complete protection. Nexium level protectiontm. Sometimes the present looked bright. Sometimes romantic. There were tears in my eyes. And tears in my eyes. And so many Little Things that we learned were really the biggest things. Through it all, we saved and had a retirement plan. And someone who listened and helped us along the way. Because we always knew that someday the future would be the present. Every someday needs a plan. Talk with us about your retirement today. Welcome back. If emergency strikes and you must call 911 from a cell phone you might expect dispatchers to be able to trace your call and find you but an nbc news investigation in partnership with ganet has found something alarm alarming. 60 of 911 calls cant be properly located. Its because the technology they use to do it is so often out of date. Heres National Investigative correspondent jeff rossen. 911, what is the address of the emergency . Im in a car in a lake. Reporter youre listening to a panicked woman trapped inside her sinking suv. Where . Where are you . The fairway. Reporter Shanell Anderson delivering newspapers in the dark in suburban atlanta when she careened into this pond. She knew right where she was. The fairway. And batesville. Reporter but 911 dispatchers cant find her on their map. Im losing air very quickly. Give me the address one more time. Its not working. The fairway. Fairway. Reporter it took First Responders nearly 20 minutes to get to her. Shanell didnt make it. Youre telling me 911 doesnt have the capability to locate someone . That is absolutely absurd. Reporter turns out many 911 centers use Old Technology relying on nearby cell towers to locate you. Often inaccurate. Watch what happens when we do our own test inside this 911 center. 911. Whats the emergency . Reporter hi this is jeff rossen with nbc news. I just want to know if you can tell me where our location is on your computer. 4641 thats about a quarter mile away. Reporter and were standing in the actual 911 center. Thats it right down there. Thats correct. Reporter and they still cant find us . Thats correct. Reporter experts say 911 centers should be using sat Like Technology instead with precise gps, already standard on most smartphones today. Things must get better. Reporter the fcc oversees the 911 system. Now creating new rules to fix it. The new rules the fcc adopted demand 40 accuracy in thefection two years. How bad is it right now if in two years the goal is 40 , which i think we can agree is not a great number. We have to push to make sure that both the wireless carriers and the local 911 folks are prepared to be able to exceed that and to give the kind of expectation that you and i have a right to have when we call 911. Reporter the fcc says its also developing a 911 app for your phone using Gps Technology hoping to avoid more tragedies like this. Jeff rossen nbc news milton georgia. When we come back imagine what it would be like to hit one of the biggest jackpots in history. 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