Bracing for dangerously cold temperatures this valentines day weekend. A polar vortex bringing bone chilling weather all the way down the florida. And whiteout conditions along sections of the new york thru way and in scranton nearby homes power lines all coated in ice. I cant even remember weve dropped this low in the northeast. So, i dont even know what that feels like. And youre not going to like it either. Its going to be a really, really cold weekend across many spots. We are looking at some dampgngerous cold. This is the leading edge of the arctic air. 19 below for the wind chill in minnesota. It will sweep down the south and east and all the places under wind chill alerts. That means how it feels will drop to 35 below zero. Thats dangerous cold. You need to layer up. And it looks like areas of the southwest will be in the 80s this weekend. So, its not everywhere. Thank you very much. Next to politics as the two democratic president ial candidates faced off in milwaukee last night. Kissinger. She talked about getting the approval or support or the mentoring of Henry Kissinger. Now, i find it rather amazing because i happen to believe that Henry Kissinger was one of the most destructive secretaries of this country. I am proud to say that he is not my friend. I will not take advice from Henry Kissinger. I know journalists have asked who you do listen to on Foreign Policy and we have yet to know who it is. One of the biggest back and forth came when clinton jabbed sanders for not supporting president obama. Today senator sanders said president obama failed the president ial leadership test and this is not the first time that he has criticized president obama. In the past hes called him weak, a disappointment. And i couldnt disagree more. The kind of criticism that weve heard from senator sanders about our president i expect from republicans, not from someone running for the democratic nominations to succeed him. Madam secretary, that is a low blow. Obama for the last seven years. But you know what last i heard we lived in a democratic society. Last i heard a United States senator had the right to disagree with a president , including a president whos done such an extraordinary job. So, i have voiced criticisms, maybe you havent. I have. Later, sanders hit back on critics saying only Clintons Campaign was historic and he was thwarting history. Well, you know from a historical point of view, somebody with my background, somebody with my views, somebody who has spent his entire life taking on the big money interests, i think a sanders victory would be of some historical accomplishment as well. And the twitter discussion was a dead tie although sanders was able to narrow the gap from the start to the end. And now to the republican race and frontrunner, dondenald group. He took time to autograph a mohawk sporting baby and a bedazled trump pacifier p. For much of the day trump was in a heated back and forth with nemesis cruz after he said trump and rubio are with president obama on gay marriage. And he said cruz is a liar and crazy and dishonest. Reporter making some 25,000 phone calls a day to topple iowa. In the state of South Carolina, i dont think people are interested in someone, a republican candidate whos pushed partial birth abortion. Paint trump as more liberal, with more ad said like this one on the way. He pretend to be a republican. Reporter for his part, trump seems to be playing a more positive Political Campaign than before. Its going to be such an unbelievable reporter but in the more mannerly south, his colorful language may bowe a big turn off. Its crass. Its not how you want your president of the United States. You turn on the tv and you have a leading president ial candidate saying profanity from a stage. Reporter marco rubio and jeb bush taking jabs that frontrunners and at each other. Jeb bush has no Foreign Policy experience, period. Reporter trying to prove South Carolina isnt simply a twoman fight. 41day armed siege at an oregon wildlife refuge. Four remaining wildlife activists surrendered after hours of tense negotiations. David frey had refused to come out but finally turned himself in. All expected to have an arraignment today. The refuge will remain closed to the public for weeks. Meanwhile, the father of two activists taken into custody two weeks ago was also arrested after landing at the portland airport. He faces several felony charges from two years ago in nevada. Four people remain hospitalized after a frightening that call about a man in a head scarf came in shortly after 6 00 p. M. Local time. He entered the nazareth restaurant and reportedly began attacking people with a machete. Diners threw chairs and other objects to stop the attack. Minutes later, the suspect was stopped and police unsuccessfully tried to taser him and he then lunged at officers with a machete and a knife and he was fatally shot. As of now theyre not calling it terrorism. A prison battle between rival drug gangs in northern mexico. Mexican Officials Say the fight started around midnight thursday between a faction of the infamous zedas gang and another group. Authorities say there was no gun fire. The situation is now under the possibility of a prison break. And the riot comes less than a week before pope francis is scheduled to viz at different prison. Now over 100 years later, we finally heard this. Thats what weve been looking for. Those are waves that came from a collision of two black holes, burst 20 times as big as the sun. The waves are ripples in space time, similar to dropping a rock into a pond. The discovery proves the last piece of einstines theory of and now meteorologist,ing into the grips of bitter cold. We will be inside, the reason why, this polar vortex, or a piece of it, will be heading our direction. A high of only 9 in minneapolis. Well see the winds relax a bit, yesterday you heard them rattling. It looks like that will subside but tomorrow, throughout the weekend, get ready for some very bitter cold across the country. Now a look at the weather where you are. Were look ath showers and lake effect snow in the midwest. And highs only in the Single Digits and nicer out the west. So, good news, it only lasts about 48 hours. By monday, already getting better. But its going to be a brutal new details on the rest of those Hillary Clinton emails. And smart phones up to 100 times faster than what you may have today. Day. I take pictures of sunrises. Its my job and its also my passion. 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Amid freezing temps, firefighters from at least five towns battled the blaze. Fortunately, no injuries were reported. We get down to business. Late news about a possible oil deal helped can cut stock losses in half. Uber has agreed to pay 28 million in lawsuits brought by riders who say the service fee as much as 230 per trip. At t is joining verizon in testing 5 g service. It would make them 100 times faster than they are right now. 5 g should roll out in the next few years. Just ahead, the zika virus has some of our star athletes on edge. Well bring you some of those details next p. If prrssrrs now, revlon introduces a new collection of mascaras that makes getting the lash look you want easy. So whether you choose ultra volume, super length, volume and length magnified, dramatic definition, or the ultimate allinone. The choice is yours. Choose love a revolution in mascara. Revlon. Love is on. 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Reporter the u. S. Olympic committee announced its hiring two Infectious Disease experts to advice the 500 athletes hoping to compete in brazil, including soccer star, hope solo. If i had to decide today to go, i wouldnt go. Fortunately, theyre six months away. Sfwlrks will compete in areas more vulnerable to zika, one in the amazon rain forest and another where the zika cases are especially high. I dont think the soccer game needs to be that close to the rain forest where theres even more mosquitos. Reporter new Research Found more evidence linking zika to babies born with microensefally. There were five during the london games of 2012. We will be waiting to hear what kind of steps are going to be taken to make sure everything is safe and secure. Reporter with women making up half the american team, the countdown to the olympics is on. Nbc news, new york. And just ahead, a big valentines day weekend ahead at the movies. Well tell you whats hot. 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Amazing story there. The massive methane gath leak in porter ranch has finally been stopped. It forced thousands to flee their homes. The Southern California gas company says the well may be days. And the city asked them to pay 500 for tamirs ambulance ride and treatment after he was shot by a Police Officer november 2014. He said there was no intent to send an unpaid medical bill to the family. And check out this video of congressman of california. Hes vaping during a congressional hearing on the topic of vaping on airplanes. He was making a point that they have helped thousands of people quit smoking, including himself. A 93yearold world war ii vet from virginia flew to australia to reunite with his former girlfriend. They did it for the first time it was morriss son who found her long lost love. They reconnected over skype and plan to spend valentines day together. Right now, pope francis is headed to cuba for a historic meeting with a pate rearc of the Russian Orthodox church. And hes supposed to meet with other officials in mexico. And happy birthday to josh bill rustle turns 82. Why we still dont know if an oil pipeline will be built across iowa. When a decision could be made about allowing the use eminent domain. Johnston development. Where the something old to make room for something new. And how this fits into the plan its busiest roads. New overnight. Police say a high speed chase lead officers all over the city. How it finally came to an end. And how the snow may have helped. Its friday february 12th