And the sudden explosion. The little girl grabbing her bag when a hoverboard ignites. The home catching fire. And the countdown is on. The oscars. Is this matt damons year for the oscar . Hes right here tonight. Good evening. On a friday night. We have breaking developments in the workplace rampage. 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 but ahead in nearly every state on super tuesday. 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 we have to get rid of the lines around the states. No, no, no, no. I watched him repeat himself 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 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 maybe to make sure his pants i dont know. Reporter we asked trump about that. Sweating backstage, that you 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 you dont need that much. 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. 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. celebrity apprentice. too. Cruz got under trumps skin. Relax. Im relaxed. Youre the basket case. Go ahead. Donald theres nothing about you that makes anyone nervous. 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 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 gain. Heres what they said. Reporter in their final push in South Carolina tonight, Bernie Sanders and hillary facetoface. Hello, South Carolina state reporter both visiting historically black colleges this is the line for people waiting to see Hillary Clinton. On these campuses, many young voters are split. Theres a big line waiting here to see Bernie Sanders, too. Hes consistent. Reporter hillary is not . No. Reporter clinton hoping a momentum from a big win in south super tuesday. 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 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 the terror at the factory, three 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. And josh higbee. At 5 06, the first help arrives. Schroeder, racing inside to confront ford in a oneonone gun battle. By 5 24, the shootout is over. Ford is dead. 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 . Reporter police say just 90 minutes before the rampage, ford was served at work with a court 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 the real tragedy is the degree to which this has become reporter night right now, 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 of syrian that could be spared more bombing. Caught in the middle, civilians. Aid agencies hoping some peace 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 can hold, could pave the way for 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. This report was concerning. It is. And adds more evidence that zika may be causing these problems. 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. Invasion of privacy brought by 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 her hotel room while she was 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, video online. Reporter andrews is now suing him and the owners and managers of this nashville 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 one. Wishful thinking, right . But there is one step you can take 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, in the hospital. Even if you have already been vaccinated with another pneumonia vaccine, provide additional protection. Is used to help prevent infections that cause pneumococcal pneumonia. You should not receive prevnar 13 if you have had a severe allergic reaction to the vaccine or its ingredients. If you have a weakened immune system, you may have a lower response to the vaccine. Common side effects were pain, redness or swelling at the injection site, limited arm movement, fatigue, headache, muscle or joint pain, less appetite, chills, or rash. Get this one done. Ask your doctor or pharmacist about prevnar 13 today. Seems like weve hit a road block. That reminds me. 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A holiday so special it arrives just once every four years. The new american tradition . Bonus discounts this monday in honor of our bonus day. 29 off select hotels on the expedia mobile app. At virgin america, a sale. And free tickets for the 29th person to retweet one of the companys twitter posts. And at jcpenney all next week, buy one item from their private label collection, get another for just one cent. Thats getting your pennys worth. Reporter plus, something specifically for the leaplings family. I was born on february 29th and there have been ten of those in my lifetime. 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. 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Next, a followup on a story we told you about last night. 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. Every day you read headlines about businesses being hacked and intellectual and it affects each and every one of us. Microsoft created the digital crimes unit we use the microsoft cloud to so we can track down the criminals. Trust and security are paramount. 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