The little girl grabbing her bag when a hoverboard ignites. The home catching fire. The oscars. Is this matt damons year for hes right here tonight. Good evening. Its great to have you with us on a friday night. We have breaking developments in a possible motive, and a major turn in the race for president tonight. Marco rubio and donald trump unleashing blistering new attacks. Worse than last night, if thats possible to imagine. And donald trump unveiling his newest weapon, chris christie, and the surprise endorsement. Trump taking incoming fire from both sides. But ahead in nearly every state heres Jonathan Karl with the new fight playing out tonight. Reporter his biggest endorsement yet. Chris christie. I can guarantee you the one person that hillary and bill clinton do not want to see on the stage come next september is donald trump. They know how to run the standard political playbook against junior senators and run them around the block. They do not know the playbook with donald trump because he is rewriting the playbook. Reporter christie is also the guy who pummeled marco rubio in the abc news New Hampshire debate and today he called rubios new tough tone desperate. Desperate people in campaigns do desperate things, flailing punches in the last days of a losing campaign. There is no better fighter than donald trump. Reporter but it sure looked like rubio had trump on the ropes last night, mocking him for repeating simple talking points on health care. We should have gotten rid of the lines. We should have gotten rid of the lines around the states. Around the states. Now hes repeating himself. No, no, no, no. I watched him repeat himself five times four weeks ago reporter and today rubio sounded like an entirely new candidate, launching trumplike attacks against trump. Last night in the debate during one of the breaks, two of the breaks, he went backstage, he was having a meltdown. First, he had this little makeup thing applying, like makeup around his mustache, because he had one of those sweat mustaches. Then, then he asked for a fulllength mirror. I dont know why because the podium goes up to here, but he wanted a fulllength mirror. Maybe to make sure his pants werent wet. I dont know. Reporter we asked trump about that. He actually suggested you were sweating backstage, that you seemed ill tell you about backstage if you would like. I walked back there. He is with a pile of makeup, putting it on his face. I said, marco, easy with the makeup. I heard he had some nasty personal comments. He was putting it on with a trowel. Reporter later, trump performed an odd impression of that infamous moment when rubio reached for his water bottle on national television. Its rubio reporter rubio clearly incurred the wrath of trump after ripping into him on that debate stage. Youre only person on this stage thats ever been fined for hiring people to work on your projects illegally. You hired some workers from poland. No, im the only one at this stage thats hired people. You havent hired anybody. In fact, some of the people and by the way ive hired and by the way ive hired tens of thousands of people over my job. Youve hired nobody. Youve had nothing but problems with your credit cards, et cetera. Reporter ted cruz chimed in too. When i was leading the fight against the gang of eight amnesty bill, where was donald . He was firing Dennis Rodman on celebrity apprentice. Reporter prompting Dennis Rodman to tweet, yes, ted cruz. Hes about to fire your cruz got under trumps skin. Relax. Im relaxed. Youre the basket case. Go ahead. Donald theres nothing about reporter but tonight its clear. The race is now a battle between donald trump and a newly aggressive marco rubio. Its time to pull his mask off so that people can see what were dealing with here. What were dealing with here, my friends, is a con artist. The whiplash today, jon with us live from texas. You heard what we said at the top, where were the attacks months ago . Is the 11th hour, right before super tuesday, too late . Thats one of the biggest questions for the entire for months, rubio didnt lay a glove on trump. With super tuesday four days away, it may be too late. And now to the democratic side, four days until super tuesday. And South Carolina tomorrow. Hillary clinton there today, Bernie Sanders returning tomorrow. Sanders team aware, showing clinton with a near30point gain. Heres what they said. Reporter in their final push in South Carolina tonight, Bernie Sanders and Hillary Clinton nearly coming facetoface. Hello, South Carolina state reporter both visiting historically black colleges right next to each other. Waiting to see Hillary Clinton. On these campuses, many young voters are split. Theres a big line waiting here to see Bernie Sanders, too. What is it about Bernie Sanders . Hes consistent. No. Momentum from a big win in South Carolina will carry her into super tuesday. Making 22 Campaign Stops here this week. While sanders is looking ahead, visiting eight other states for super tuesday and beyond. This morning in minnesota, sanders turning up the attacks. Because maybe what you said behind closed doors is a little bit than what youre saying to the american people. I would hope she would do that. How are you . Pouring on the southern charm. Unexpectedly crashing this bachelor party. Cecilia vega with us. After that republican brawl last night, Hillary Clinton saying she thinks its going to be trump . She sure did, and already fund raising off of a possible trump nomination. Saying shell fight to make sure he wont become president. She says hes no joke. Thank you. And super tuesday, special editions of good morning america, and well be on the air beginning 10 00 p. M. Eastern, super tuesday. And to the other developing story this friday night, the workplace shooting in kansas. The gunmans own video on his facebook page, showing an automatic weapon. Killed, more than a dozen hurt. And that could have been much higher if not for a hero police officer, the first on the scene. Heres clayton sandell. Reporter in this clip posted to facebook last september, 38yearold cedric ford is firing an akstyle rifle. The same type sources say he used to gun down his coworkers late yesterday at this kansas lawnmower factory. It began at 4 57 p. M. Police getting calls about a gunman randomly shootibg a driver in the shoulder. Not far away, shooting another, stealing his car. By 5 04 p. M. He is pulling onto the excel lot six miles away, shooting one person outside. Inside, fourteen more. People are getting pushed, trampled. It was just, everyone was trying to get out of the shooting, reporter three excel employees are killed. Renee benjamin, Brian Sadowsky at 5 06, the first help arrives. It is hestons police chief doug confront ford in a oneonone gun battle. By 5 24, the shootout is over. Ford is dead. Sergeant chris carter says what his boss did saved a lot of lives. If theres gunfire, we go to the gunfire. If youre by yourself, youre by yourself. Reporter run towards the gunfire . We will run towards it. Reporter police say just 90 minutes before the rampage, ford was served at work with a court order to stay away from an exgirlfriend who alleges he was violently abusive. She wrote, he is in desperate need of medical and psychological help. Reporter today, the president made yet another call to a mourning community. The real tragedy is the degree to which this has become routine. The factory is still shut down for the investigation. And saying the police chief is a hero. Clayton, thank you. Now to breaking developments overseas tonight. A cease fire in syria, brokered by the u. S. And russia, taking effect just a short time ago. But a fierce round of air strikes in the hours before. Alex marquardt, from damascus. Reporter bombs pounded rebel areas today, just hours before the ceasefire agreement went into effect. Here in syria, there is little hope it will succeed. Are you optimistic . Not really. Reporter everyone agrees isis and al qaeda will still be targets for all sides. But heres the problem. The Syrian Regime and their russian backers see almost all rebels see as terrorists. Meaning that only tiny pockets of syrian that could be spared caught in the middle, civilians. Will let them deliver muchneeded aid to besieged areas. David, these next few days are a critical test after five years of war. This temporary ceasefire, if it new peace talks in the next two weeks. David . Alex, thank you. Next, back here at home, to the new headline this evening on the zika virus and pregnant american women. The cdc revealing whats happened to nine women infected overseas. Its sobering. Two with miscarriages, two chose abortions due to severe damage. And two have been born healthy. And dr. Besser with much more. This report was concerning. It is. These were all women who had symptoms of zika. It doesnt tell us what part of pregnancy could be the most dangerous. And a new focus on the olympics . Yes, they have to try to avoid sexual transmission for the entire pregnancy. Next to the alarming headline from michigan, the stunning allegations in flint. The water crisis there. Showing lawyers urged them to stop using the water months. One of them calling the river downright scary. It was not switched for another year. Next to the lawsuit over erin andrews. Suing a stalker and the hotel who booked him in a room next to hers. The video seen nearly 17 million times. Heres linsey davis. Reporter all eyes will be on erin andrews monday as the sportscaster and dancing with the stars cohost is expected to take the witness stand in her 75 million civil trial against a nashville marriott hotel. Her testimony comes after the videos at the center of this case were played for the jury. Videos taken by her stalker, Michael David barrett, who used his cell phone to record her in changing through an altered peephole. An emotional andrews left the courtroom as jurors watched the video, which is estimated to have been viewed nearly 17 million times. I know of no way to get it off. And doing continued research, people are still posting the video online. Suing him and the owners and marriott claiming the hotel intentionally placed barrett next door to the tv star and failed to notice he removed and altered the peephole on her door. The hotel claims barrett is a criminal who tricked them into gaining access. Jurors will see barrets deposition by videotape next week. David . Thank you. And theres still much more ahead on world news tonight this friday. What caused this huge explosion in the kitchen in a family home . And the Real Money Team is back. Major savings, including the Department Store offering onecent deals. And the big question, is this the year for matt damon and the best actor . Right here with robin roberts, as we continue tonight. What if one situp could prevent Heart Disease . One. Wishful thinking, right . To help prevent another serious disease. Pneumococcal pneumonia. If you are 50 or older, one dose of the prevnar 13 vaccine can help protect you from pneumococcal pneumonia, an illness that can cause coughing, chest pain, difficulty breathing, and may even put you in the hospital. Even if you have already been vaccinated with another pneumonia vaccine, prevnar 13 may help provide additional protection. Prevnar 13 is used in adults 50 and older to help prevent infections from 13 strains of the bacteria that cause pneumococcal pneumonia. 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I was born on february 29th therefore, im 10 reporter pizza hut is offering a free onetopping personal pan pizza. We also spoke to a number of Additional Stores and restaurant restaurants to look for more sales on monday. Thanks. Next, we remember an actor from rocky. And what caused this explosion inside a kitchen in a family home . A very close call for a little girl there. We came up with a plan to help reduce my risk of progression. And everywhere i look. Im reminded to stick to my plan. Including Preservision Areds 2. My doctor said Preservision Areds 2 has the exact nutrient formula that the National Eye Institute recommends to help reduce the risk of progression of moderate to advanced amd. After 15 years of clinical studies. Preservision areds 2. Beyond natural grain free pet food is committed to truth on the label. P when we say real meat is ther first ingredient, it is always number one. We leave out poultry byproduct meal, corn, wheat and soy. 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To the index of other news tonight. Starting with a dangerous fire sparked by a hoverboard. This video captured on a Home Security camera. Hoverboard batteries explode. Huge flames ripping through the home, north of chicago. And look at this. A little girl got out just moments before the explosion. Screen. The u. S. Airways aborted takeoff in philadelphia. It happened two years ago. Officials now say the cause was pilot error, not a blown tire. The plane slammed into the runway. Passengers quickly evacuated. And tonight, new video released of the moment the plane touched down, collapsing the landing gear, skidding off the runway. Two people were injured. And a passing to note tonight. Hollywood remembering rocky star tony burton. The actor and boxer who appeared alongside stallone rocky films has died. Tony burton was 78. When we come back, matt damon is here. Will this be his year to win best actor . What he has to say. Our countdown to the oscars, when we come back. 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