Personal information. Nightly newssegins right now. Announcer from nbc news world headququters in new york, this is nbc nightly news with lester holt. Good evening. There are w wnings tonight of a dangerous freed about to plunge a huge part of the country in its grip as theereaded polar vortex moves south. Parts of 16 states will see temperatures below zero and windchills that make it feel a lot colder. Yes, its winter. Supposed to o cold, but as weve come to knkn c cd snaps of this extreme cane deadly, and in this case tens of millions people are bracing for the biggest chill so far this season. In a moment, al roker, but we begin with nbcs ron mott in boston. Reporter 65 million americans bundndnd up against the brutal cold as the ever present polar vortexexunleashes yet. The winds are like knifecutting into snow brought a burst of snow as far south as tennessee and the carolinas causing trouble for commuters. Commuters also stranded in new york where c cd weather likely c ctributed to train delays during rush hour. In pennsylvania, a broken water pipe left this home frosted over, and in chicago orists are taking extra care witit their valentines day delivevees. Its tererble for flowers. If they are frozen, they a a gone. R rorter here at fenway park the red sox are heading south to florida for sprinin training, giving up their home to skiers and snowboarderssho are literally jumping for joy. And further north in maine the biathlon worlrl cup left competitors with frozen faces. Record low temperatures are possssle from minnesotaao the midatlantic. Buffalos forecast for saturday, 2 grees. Bostons looking at 4 below sunday morning and new york city is bracing for zero, toppling a 100yearold record, so cold in fact that saturdays annual ntral park icece festival canceleld. You shohod take this weather very, very seriously. Temperatures very often, and they canan be reporter here in the boston area, the wiwichills are forecast to dip down to 20 to 30 below zero over the weekend, even colder in some places, as low as 40 below those temperatures frostbite becomes a real concern. Doesnt takeeery minutes. Lester. Ron mott, thanks very much. Al roker i ihere. Al, walk us through this. So lester, the beginning of this cold greenland. Were talking temperatures of 60 below across the greenlanddce sheath. Youve got low pressure over quebec and this strong lowow pressure system with counterclockckse flow around it it brings that c cd air, brutally cold air into thth continental united states, so low temperatures tomorrow morning, burlington minus 12, 5 in cleveland and 10 chicago and 17 in charlottee and 21 in atlanta. Ghs tomorrow, 19 in new york, 1 1 cleveland and 14 chicago butut as ron mentioned those minus 6 in new york and minus 4 in ncinnati and minus 13 in chicago, and then we bottom out on sunday morning, but e good news, lester, by tuesday temperatures rebound into the 50s and 30s. Everybody either at or above normal. Ll right. Al roker, thanks very much. True to predictions its getting nasty on the campaign trail in South Carolina as donald trump lobbed another socalled birther attack todayay reatening to sue ted cruz fofo quote,ot being a natural born citizen. If cruz d dsnt as trump clean up his act and that battle is just one offeveral fronts opening up as the gop candidates sharpen their attacks on each other. Nbcs Gabe Gutierrez is o o the trail in greenville, South Carolina. Reporter fresh off autographing a baby in louisianan republican frontrunner donald trump is now leaving a new signatutu on this race, threaeaning to susu his closestst rival ted cruz for not being a naturalalorn citizen. Twitter the billionaire calling the texas senator a negative ads against him. Theres more than a little irony in donald accusing anyoneeff being nasty given the amazing torrent of insults and obscenities and vulgarities that come out of h h mouth. Repepter r hese voters have serious concerns about trump repeated a vulgarity at a rally this week and d dcribed him this way. Leader. Flashy. Alplp dog. Rich. Dogmatic. Narcissistic. Inspirational. Reporter cruz himself is mocking his ponent in aeries of new ads, this one against marco rubio backfired. Makes me feel dumb for trusting them. Maybe you should vote for more than just a pretty face next time. Reporter Cruz Campaign yanking it aftete the revelation that actress had appeared in adudu films. We would not have castster h h we known of that history. Reporter rubio today firing back inn an exclusive interview. The bottom line is ey were actor, and i think thats parar of a bigger problem that he tries to act like the only consistent conservative in thihi race. Its just not true. Hes a recalculated litical operativiv reporter all this as several gop hopefuls try to court crucial evangegecal voters. Faith is the mosos important influence in my nighgh one night reading the bible i just got a serenity. Reporter tonight amid a flouriflurry of attacks serenity in this race is hard to find. The republican candidates are set to face off in another debate tomorrow. The stakes may be highest for marco rubio. Hessxpected to take some of the heaviest fire, especially from his mentor and felelw Floridian Jeb bush. Lester. Allllright, gabe, thank you. Ttacks are flying dontic side of the race with Bernie Sanders accusing Hillary Clinton of hitting him with a, quote, low blow on the debate stage last night, and a heated battle over the Different Directions they take on health care in this country. Lets get more from nbcs andrea mitchell. Reporter tryryg to rebobo her campaign, Hillary Clinton accused Bernie Sanders president obama who is hugely popular with minorities in the primaries and caucuses to come. The k kd of criticism that weve heard from senator sanders about our president i expect from republicans. Madam secretary, that is a lo below. Reporter and she pounced on his proposed m micare for all, birthtodeath Government Health care sgsgn with health care, this is not about math, this is about peoples lives. The numbers dont add up, and i think once im in the white h hse we will have enough Political Capital to be able to do thatat secretary clinton, youre notot in the white house yet and let us be clear that every proposal that i have introduced has reporter sanders would combine all Government Health plans into one, medicare, medicaid, veterans benefits, Childrens Health insurancnc and replace employerbasas health insusunce. How to pay for it . Sanders would tax the rich. Class would pay 500 a year more in taxes, but average family would save 5,000 a year by eliminating insurance premiums. Who is correct here . Here are a lot of tax increases but itt certainly not clear that they would be enough to pay for all the additional expenses. Reporter nonbudget partisan experts say sanders hasnt given enough details and in canada and Great Britain which have Health Care People wait months foror procedures, a form of rationing. There will be tradeoffs, and if we want to save money youll have to undedetand that your access to Health Care May be limited. Reporter and then e political costs, Getting Congress to pass his Health Care Planan with the most bruising fight of the obama preredency but Bernie Sanders is calling for a political revolution, a grass roots army he lieves would compel congress to accept his vision. Lester . All right, andrea, thank you. The fbi is investigating a vicious attack that took place inside a restaurant in ohio. It happened when a man pullll out a machete average, slashing and stabbing people as customers made panicked calls for help. The questions investigators are trying to answer why did he do it and c cld it have been an act terrorism . We get the late forestt our justice correspondndt pete williams. Reporter police say a man walked into this columbus restaurant around dinnertime, asked some questions and came back a short time latat we are a machete. Some guy pulled out a machete and started stabbing people i ran out with my kids. There are several people injurededhere. Reporter some of those inside threwew airs to fight back. He ran out, drove away and was s spped after a fivemme chase. Police say heeas shot and killed when he lulued holding a knife at one of them. The fbi immediatelyly began searching the home o othe man identified as the atatcker, 30yearoldd mohammed barrie. Radical comments four years ago b bught a brief look from the fbi and then movov on. Restaurant employees say when he first came the ownerers f fm isisel, a christian arab. Investigators are looking at whether barrie may have mistakenly thought he was jewish. Im a 50yearold man and been crying like a baby for the last 12 hours. Reporter four people were hurt, the mostst seriously big foley who sings at thehe aurant now in critical but stable condition. Were very gratetel at our victiti that sustaineddounds last ght are all expected to recover. Reporter investigators say they dont know why barrie attacked now and shows that target, no known connections with isis. It may be one Law Enforcement official says a blend of factors, a l lg simmering interest in radicalism and all the attention given to terror attacks worldwide. Pete williams, nbc news, washington. The city of glendale, arizona is in shock and mourning after the shooting deaths of two 15yearold girls on a high school campus. The girls, both sophomoror, died of single gunshot wounds at independence high school. A gun found beside police say they are not pursusug any suspects, but they could not yet confirm if it was murder or suicide. Within a week a temporary crease fire in syria brokered with the help of the u. S. Is schedule to take effect, but key parties have been left out of thth agreement announced last night. Our keir simmons now withth rare look inside syria where theres much skepticism over whether the deal will end t t bloodshed. Reporter a little boy is pulled from rubbbb after an air strike. The video said to be in aleppo province was posted on facebook laststweek. Tonight there is little signs those air strikes will end, even with World Leaders including america and russia agreeing to a cessation of hostilities within one week and humidianid to communities end siege suffering starvation. And what we have here are words o o paper. What we need to see inn actions on the ground, in t t field reporter Major Players innhe fight, including syrian president Bashar Al Assad and the rebels fighting him are not part of thth deal. Neither is isis. And today assad is vowing to rerekeke the whole country. President assad is very visibly in control of the capital damascus while outside the c cy his forces are clearly on the offefeive. The syrian army advancing, backed by russian air strikes. They have gained momentum, the upper hand. Why would they stop now . While in damascus few people the fightiti will stop. Do you believe there will be peaea now. I dont think so. I think nobody nobody knows when t t peace is gone. 6yearold ayas lex were broken while in an air raid while she was out buying cookies. Shes one of tens of thousands who have fled. Losing hope. Keirirsimmons, nbc news, damascus. A major announcement from three federal agencies about a possisie danger that nbc news first reported on nearly a year and a half. The government will investigate the potential health risks from a type of turf that Children Play on all across the nation. Nbcs Stephanie Gosk has more. Reporter these soccer players, all goalals, all diagnosed with cancer, sparked a battle over the use of foam rubber, ground up car and truck tires in tens of thousands of turf field around the country. Todada three f feral agencies, including the epa, announced a w Research Plan to analale the safety of crumb rubber. E existing studies do not comprehensively evaluate the concerns. Nbc news first reported on crumb rubber in october 2014. This is the stuff everybody is t tking abouou reporter woman soccer coachchmy griffin started asking questions after two of her goalies devevoped cancer, a conversation who would later die of nonhodgkins lymphoma haunted her. She said i just have a f fling it h h something to do w wh those block dots. Reporter coach started a list of goalies with cancer which grew from just a handful to now 75 following nbcs reports. There is no research linking crumb rubber exposusu to cancer, and the industry points to dozens of studies as proof that their fields are safe, but the federal government today sayss more reacher is eded. The three agencies will analyze chemical compounds i i the crumb exposure to thoho chemicals and reach out to concerned parents, scientists and Industry Leaders. Parents likeehis who w the the use of crcrcr rubber hope that communities will hold off in installing new needs. Why not pause, use alternatives until this thing gets figured out because our children are certainly worth it. Reporter today Industry Leaders say they welcome the new research. In their words they hope theheederal government can settle thisisatter once and all right. Still ahead tonight, thieves after your medical records. Why you could be at risk without even knowing it, and one experts say you should never share with your Doctors Office in n order to protect your identity. And the cost of college could be out of reachchor those in this kindergarten are old enough, b with the pain and swelling of my moderate to severe Rheumatoid Arthritis. Ordinary objects often seemed. Intimidating. Doininsomething simple. Meant enduring a lot of pain. If ra is changing your view of everyday things orencia may help. Orencia works differently by targeting a source of ra early in the inflammation process. For r ny, orencia providid longterm relief of ra symptoms. Its helped new ra patients and those not helped enough by other treatments. Do not take orencia with another biologic medicine for rara due to an increased risk of serious infection. Serious side effectstsan occur including fatatainfections. Have been reported. Tell your doctor youre prone to or have any infection like an n en sore, the flu, or a history of copd, a chronic lulu disease. Orencia may worsen your r pd. If youre not getting the relief you need. Ask your doctor about orencia. Orencia. See your ra in a different way. The flu virus hits big. With aches, chills, and fever, theres no such thing as a ttle flu. And it needs a big solution an antiviral. So when the flu hits, call your doctor right away and up the ante with antiviral tamiflu. Prescription tamiflu is an antiviral that attacks the flu virus at its source and helps stop it from spreading in the body. Tamiflu is fda approved to treat the flu in people two weeks of age and older whose flu symptoms starard within the last two days. Before taking tamiflu, tell your doctor if youre pregnant, nursing, have Serious Health conditions, or take other medicicis. A sesere rash, or signsnsf unusual behavior, stop taking tamiflu and call your doctor immediately. Children and adolescents in particular may be at an increased risk of seizures, confusion, or abnormal behavior. R. The most common side effects are mild to moderate nausea and vovoting. Antiflu . Go antiviral with tamiflu. Hand now a warning as risk. Medical records being hacked, stolen and sold for fraud. Up 11,000 last year, roughly one out of every three americans has been hit, whether they know itr not, giving criminals a wealth of information that unlili compromised credit card numbers can last forever. Nbcs tom costello has what you can do to protect yourself. For john coon it was a simple xray after a snowboarding accident that turned into an counting n nhtmare when the hospital billed him 20,000 for surgery he never had. I had to go down in front of the Billing Department no less andnd ll up my shirt and show them that i did not have any major scarring on my stomach at all. Reporter it turns out the hospitals hard drive had been stolen along with johns medical records. Just one of the 100 Million Health care records stolen last year alone. Many of thoseseecoror show up foror sale on the dark web where hackers openly advertise t tmselves and what they have this site offers fresh health care profiles stolen l lt aprpr in california boasting youuan use those profiles for normal frauau stuff or to get a brand new Health Care Plan for yourself. This looks very user friendly, and this is dedegned for crooks. This is where information from big data breeches ends up as xhomd tis are being stole. Reporter stolele credit cards going g for 1 to 3 each and Social Security numbers 15, but complete Health Care Records are a gold mines going for 60 bucks because criminals can use them to order escriptions, pay for treatments and surgery and even file false tax returns. You basically own a person, have all the information and can you create a new account and fake his whole identity. Reporter to avoid getting hacked ibm Security Pros advisee using following good work practices, dont use the same passwords and avoid giving outut your Social Security numbers, even the last hospitals and Doctors Offices. You really need to push back on those situations and say, look, can i give you a p. I. N. Or some piece of information that can i change on a regugugu basis. Reporter if your Health Records are compromised, your Financial Life can be, too. Tom costello, nbc news, new york. When we come back, surfs up, way up. 50foot waves superchargrg by el nino are making one of the worlds most intense com im billy, and i quit smoking with chantix. I had a lot t