And raised has brutally killed people in such a horrific way. And why she says shes talking now. And kanye wests nationwide party for his new album. The surprise guests and a new feud brewing this morning because of what hes singing about taylor swift. Are they about to have more bad blood . And we do say good morning, america. Good to have lara back from l. A. Baby, it is cold outside. Take a look at buffalo, where snow is piling up on the ground. Its 15 degrees. The wind chill, just 5. Two days until valentines day. Its going to get colder and colder. Build a fire. Get cozy. You guys are dressed for thing. Were willing it. Willin it. Its in your mind, and so it meanwhile, the polar plunge taking aim at a lot of the country. Its a little more than mind over matter. You can see my breath. Wind chills near zero. It will get cloelder through the next couple of days. The cold air filtering over the great lakes. Over three feet in some spots here in oswego, near fulton, east of ontario and lake erie is where the snow zone is. The bitter cold will continue. These are the wind chills we expect sunday morning. This is what it will feel like against your skin. This is dangerous stuff. If youre going out, you have to cover up everything if you can. Tomorrow morning, 2 degrees the actual temperature in chicago. And, similar numbers on sunday morning. So, not only have to take care of yourself but your pets, neighbors, your pips. Any vulnerable spots in your home, you need to take care of that. In some cases, robin and gorge, this will be the coldest night sunday morning in decades. All right there, rob. In decades. Now to the race for the white house. Your voice, your vote. The democratic candidates, Bernie Sanders and Hillary Clinton getting heated. At last nights debate. Trading sharp words ahead of the next vote. Good morning, cecilia. Reporter good morning to you. Both sides feeling the pressure. Last night, Bernie Sanders, to keep the momentum going. Hillary clinton to tap into the momentum. It was the formula for a heated rematch. Facing off for the First Time Since the New Hampshire landslide, Bernie Sanders feeling confident. Lets not insult the intelligence of the American People. People arent dumb. Reporter the battle lines drawn overnight on this debate stage. From health care. But i think the American People deserve to know specifically how this would work. The numbers dont add up and many people will actually be worse off than they are right now. That is absolutely president obama. Hes called him weak, a disappointment. Madame secretary, sthat a low blow. One of us ran against barack obama. I was not that candidate. Reporter the contest now heading into South Carolina and nevada. And the race to appeal to black and latino voters at fever pitch. Were going to change policing practices. Race relations would be better under a sanders presidency than theyve been . Absolutely. Reporter Hillary Clinton hoping to recover from the embarrassing defeat, trying to show her dominance. Im not asking people to support me because im a woman. Im asking people to support me because i think im the most qualified, experienced, and ready person to be the president and the commander in chief. Reporter offstage, hoping to a fundraising letter saying im not kidding, maddi. Im not kidding. Spawning the hashtag im not kidding, maddi. Just a dollar, right this second. All going viral. Certainly going viral. Both sides claiming victory. No surprise there. What you did see is a shift in tone from Hillary Clinton last night. She didnt come out swinging as she has in past debates. Her goal is on paint herself as someone two can get the job done to show sanders policies as unrealistic. It will be a theme nor the next few weeks. Thank you. We move to the republicans right now. Its all about South Carolina. With most of the candidates trading blows ahead of their debate perform tomorrow, donald trump is trying a kinder, gentler approach. He even signs a baby. Jon karl is tracking it. Reporter good morning, george. Debate here in greenville, this republican race has turned into an allout brawl. Donald trump, the frontrunner, says hes going positive. Donald trump is so confident now, at rally in louisiana overnight, he was already looking ahead. To his reelection campaign. Im going to be there. Im going to do great job. Hopefully, maybe i get an extra four years. Maybe i dont. Reporter in another sign of confidence, hes pulling negative ads from the air in South Carolina and going positive. He wants to make america great. Thats what i want, foop. Reporter the other candidates are not turning the other cheek. Donald trump has zero Foreign Policy experience. Negotiating a hotel deal in another country is not Foreign Policy experience. Jeb bush has no Foreign Policy experience. Period. Reporter president ial politics can be rough and tumble. Trump is charzing cruz making robokals. Reporter check out this new ad slamming trump on Eminent Domain. Pattern of sleez stretching back decades. Worse, trump still supports Eminent Domain today. Reporter we caught up with jeb bush. Are you going to be able to stop donald trump here . I hope so. Reporter why does he keep hitting you . He must be worried. Reporter inside, bush went on the attack. Do you want an entertainer in chief . Someone who will say whatever he wants, to make it all about him . Insult people . Divide people . Reporter bush was fired up. Back outside, he took motherly advice from a supporter. How tall are you . 64. You need to stand up straighter . Yes, maam. Reporter jeb bush is banking on family help to help revive his campaign here in South Carolina. His brother, former president george w. Bush will head up a here in South Carolina, the bush name and former president bush is still popular. It sure spp lets bring in jeb bush. Governor, thank you for joining us this morning. As jon just alluded to, yourr brother very popular in South Carolina. He got his way to the nomination by defeating john mccain there in 2000. Donald trump saying bringing your brother is a sign of desperation. Why not call on him earlier . What you to hope he can do for you now . Well, look, hes been supportive for a long while. This was the appropriate place for him to start his campaigning. This is the beginning of the campaign. What donald trump says about my brother has no relevance to this. Hes popular because he kept us safe. People here are promilitary. Proveterans. Hi brother served as commander in chief and people respect that. And now, were in a commander in chief primary. Commander in chief election. Were living in dangerous times. On my behalf about the skills i have to lead this country will be helpful. The commander in chief primaries. Is donald trump prepared to be commander in chief . He hasnt shown it hes not shown seriousness as it relates to the threat of our time. Isis, for example, hes gone from saying we dont have a do in the fight to let isis take out assad. The latest tack is bomb the profanity out of isis. Thats not a serious plan. We need to lead the world to rid ourselves of a threat. I dont think hes a serious candidate in that regard. Look, hes preying on peoples angst and fears. He does it in a marvelous, fantastic way. Huge crowds. Lots of energy. But the simple fact is as it gets to specifics on Economic Security and National Security, he doesnt have one. You have said that well be trump is elected president. How can you pledge to support him if hes the nominee if you believe that . I said in terms of off. We cant be worse off as it relates to the National Security of this country with Hillary Clinton as president or on Economic Issues as well. In terms of dividing our country, thats the skill set of thats bad. And its wrong. You cant disparage women, hispanics, the disabled. People who are war heroes and expeek well live in a country purpose. The president of the United States has to use words carefully. Profanity and divisive language isnt going to help us to allow people to get a pay raise for the first time in a decade. Meantime, other candidates swinging ard hat you. Marco rubio saying you have no Foreign Policy experience. John kasich is saying thats laughable . When you compare marco rubios experience of going to Committee Hearings once . Awhile. I was the governor of the state of florida. I led the national guard. I had trade missions. Ive lived overseas. I have invested overseas pip have vast experience as it relates to the world. And im pretty fluent on Foreign Policy issues. I look forward to debating marco on these issues. We share a common belief that the United States needs to be engaged in the world. To suggest he has Foreign Policy experience and i dont is ludicrous. Came in fourth place in New Hampshire. Is sk sack must win . No, no, look, were in it for the long haul. Were on to nevada after South Carolina. Im looking forward to the ten days of hard came panningpaigning. People want to know who has the steady hand. Who can make the tough decisions . Who can have the back of the military . Restore the devastating military cuts . Veteranshen they come home . That seems to be rezsonateing here. Governor bush, thank you for joining us this morning. Thanks, george. We move on from politics to breaking news overnight. A terrifying take at a restaurant in columbus, ohio. Man with a machete targeting diners before Police Killed the suspect. Pierre thomas is in washington with the latest. Reporter good morning. Robin. It truly was a nightmare. Now the fbi is trying to figure out if it was terrorism. At 6 20 p. M. , the man carrying machete burst into the nazareth restaurant launching his attack. Shocking customers. No rhyme or reason as to who he was going after. As soon as he walked in, according to some of the witnesses, he twoept male and female just inside the door in a booth. At that point he started the attack. Reporter two men ran out to call 911. While those inside took matters into their own hands. Throwing chairs at him, trying to get him out of there. One of the employees was able to grab something there behind the register and came out. Reporter the suspect fled the restaurant. Jumping into a car. Witnesses describing the vehicle to police. Even taking video for evidence. Police caught up with the suspect a few miles from the restaurant. The man inside allegedly lunging at him with a knife. They tasered him. Officers shot him dead as he continued to lurch in regard. Some witnesses say he came in half hour before the take asking for the manager. Four victims going local hospitals with one in critical condition. An intensive investigation under way to determine who the suspect is and with whether he was inspired by terrorists. Were going turn to frightening moments now for passengers aboard an American Airlines flight. Smoke filled the cabin. David kerley has the latest. Reporter good morning, george. Emergency crews were ready. Look at the scene inside the boarding area after they got the passengers off. This morning, passengers are recovering after their American Airlines jet partially fills with smoke. And ground crews are alerted. We have an emergency inbound, give me about two minutes. Reporter the flight took off just before 10 00 in the morning. Not long, smoke engulfing the cockpit. He was on the oxygen mask. The masks had dropped in the cabin. That made concern to us. Reporter with their masks on, the pilots divert to los angeles for an emergency landing. There should never been smoke emanating from any part of the plane. Its a pilots worst nightmare. Reporter those emergency crews were ready. Fire trucks surrounding the aircraft. The 125 passengers evacuated. The boarding area becoming an passengers complaining of breathing difficulty. A loft pandemonium here. People are scattered. A pretty, pretty scary day at l. A. X. Reporter where did the smoke come from . The possibility of a hydraulic leak is being invest gaited. Heres something a lot of us dont realize. In almost every jet that you fly in the air that youre breathing, the air comes through the engine before coming into the cabin. If you have a leak, smoke, theres a good chance it will be inside the aircraft as well. I did not know that. Thank you, david. Lerts go amy for todays other top stories. Aen arrest in the cyberattack against the cia director. Thats right. A teenager they believe is behind a series of hacks aimed at National Security officials. The pemp accounts of top officials at the cia, fbi, and officials have not released the suspects name. But say he is under age. Its being called a significant step toward a peace deal in syria. Secretary of state john kerry and his russian counterpart agreed overnight to a temporary halt in fighting by next were. Theres serious doubt where the Syrian Government will go along. Dozens of Prison Guards in georgia are in custody, busted in a sting. The undercover investigation uncovered staggering corruption involving 46 current and former officers, accused of taking bribes and smuggling drugs. It could take a week to fully extinguish this fire. The smoke visible for miles shut down major roadway. No injuries reported. And uber has agreed to pay 28 million to settle a classaction lawsuit over safety claims. The suit accused uber of making false statements about driver back ground checks. Theyre eligible for a refund. Look at this bizarre sight at bostons fenway park. A giant ramp was installed for the Winter Sports event last night. Athletes launching off that 140foot jump. The 2018 olympics will be the first to include big air snowboarding. A new york man zbeting more desperate as valentines day approaches. He needs to find his wifes clothes. Take a look at the sign. Hes trying to find 1,000 worth of his wifes clothing after he put the dry cleaning in the resiblging bag which his son then tossed out with the trash. The sign says, please contact dead husband walking. What would ali do . I would just write the check. Youre a smart man. A smart man. A new wardrobe for ali. Thank you, amy. Rob, we brought you in from that cold is stretching all the way to florida. Check this out. Frost in melbourne on the windshield and rear window. Were not done with the cold. Were going to increase it. Winter storm warnings for parts of north carolina. Up to a foot through parts of maine with the next clipper coming through. To by macys. 50 degrees in denver. 88 in phoenix. That sounds toasty. With the valentines day chill, im getting interesting comments on the twitter feed. I saw that, too. Nine months from now, you never know whats going to happen. Interesting. It is cold outside. Coming up here on gma, thank you, rob. Her son a mass murderer. Now, for the first time, the mother of one of the columbine killers opens up to diane sawyer. Part of the shock of this was learning that what i believed, how i lived, how i parented more of dianes gripping interview wh sue klebold coming up. May not be a bargain. So my kids dont have to forage, got two jobs to pay a mortgage, and ive also got a brain. Lifes short, talk is cheap. Ill be working while you sleep. Still dont think ive got a brain . You think a resumes enough . Wholl step up when things get tough . Dont you want that kind of brain . A degree is a degree. Youre gonna want someone like me. But only if you have a brain. Theres no one id rather. Share with. No one id rather lean on. Being in love is an amazing thing. Being in love with your best friend. Is everything. Introducing the ever us twostone ring. One diamond for your best friend. One for your true love. For the one woman in your life whos both. Ever us. New this valentines day at jared, kay and zales. Wish your skin could bounce back like it used to . Neutrogena hydro boost water gel. With hyaluronic acid it plumps skin cells with intense hydration and locks it in. For supple, hydrated skin. Hydro boost. From neutrogena some things are always there for you. [ alarm ringing ] like your alarm clock right on time. Your parking space. Seriously . [ car alarm chirps ] and avocados from mexico theyre always there because theyre fresh all year round. Welcome back to gma. And look at buffalo, new york, right now. A big blast of snow right now. Dangerous cold temperature. We all know it will be a very cold valentines day weekend for 65 Million People. Ready . Not really. But what choice do we have. Fire. Exactly right. Also right now, six republican candidates ready to make tomorrow night their first faceoff. After trumps big win in New Hampshire, john kasichs surprising second place finish. And the department of holeland security trying to fight the zika virus. They may point people to the cdc. Could there be more bad blood for kanye west and taylor swift . The superstars making headline again. What kanye is saying about taylor in a new song getting quite a lot of backlash. Her brother weighing in. Last night, lamar odom. To rob. And a special guest. Now to an abc news exclosive with the mother of one of the kol m bin kylers. 17 years ago, dialen klebold and his friend, eric harris, killed 13 people at columbine high school. Dylans mother, sue, sat down with diane for the first time ever. 17 years ago . 17 years. For some, just like yesterday. We have got try to learn something. Got to try to learn something both for our own lives and our own children but also to protect against the next school shoot