Buildings leveled. And prosecutors this evening arguing, it was all because of greed. And we have breaking news involving bill cosbys wife. And gas prices dropping to 99 cents a gallon. Is your town next . Good evening. And its great to have you with us here on a thursday night. And we begin with a new turn in the race for president. On both sides, it is now a battle for the south. And donald trump now saying, if he wins in South Carolina, hes going to, quote, run the table. On the democratic side, Hillary Clinton and Bernie Sanders set to battle tonight on that stage. Many eyes on clinton. Will she change her strategy after a bruising loss in New Hampshire . Abcs Jonathan Karl in South Carolina tonight, where trump now says there is something you will not see from him. Reporter taunting his rivals, donald trump is declaring, if they cant beat him here in South Carolina, they wont beat him anywhere. Run the table. If we win here, after winning so big in New Hampshire, all of these characters are going to give it up. Were going to run the table and we will make America Great again. That i can tell you, okay . Reporter the Trump Campaign says its so confident, its only going to run positive tv ads. He wants to make America Great and thats what i want, too. Reporter but theres one candidate trump still cant resist attacking. You have a guy like bush, who has this big fund its terrible. Ill be honest. The last thing we need is that i can tell you. Reporter we traveled to florence, South Carolina, to meet up with governor bush. As he went into the venus restaurant, he seemed irritated by the mere mention of trumps name. 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, he hit back. Do you want an entertainer in chief . Someone who will say whatever he all about him . Insult people, divide people . Basically just talk trash on his way to the republican nomination . Reporter South Carolina president ial politics is known for its brass knuckle attacks. Ted cruz is out with this video, ridiculing trump. Look, i got the trump action figure. No way, its huge. What does he do . He pretends to be a republican. Reporter and today, marco rubio launched his own grenade at trump. Donald trump has zero Foreign Policy experience. Negotiating a hotel deal in another country is not Foreign Policy experience. Reporter rubio is still haunted by his bad debate. Were here to see marco robot roboto. Is he inside . Reporter those mocking rubio robots following him to South Carolina. But at a town hall meeting today, a vote of confidence. As far as the robot stuff, you havent brought that up, but just keep in mind that the terminator was elected twice as governor of california. Reporter that won governor schwarzenegger, of course. From columbia, South Carolina, tonight, and job, n, there has been so much talk on the republican president george w. Bush would be a help or not, if he campaigned for his brother, jeb. And theyre about to give it a shot . Reporter the former president bush will be at brother in charleston on monday. Its the latest indication, david, that jeb bush, who started the campaign saying i am my own man, is now banking on the bush name to help save his campaign. Jonathan karl in South Carolina. Jon, thank you. Meantime, to major developments on the democratic side tonight. Hillary clinton and Bernie Sanders, and the showdown this evening. Theyre in wisconsin now, their first debate since Bernie Sanders trounced Hillary Clinton in New Hampshire. Both now looking to nevada and South Carolina. Polls in that state have shown clinton with a lead, but sanders, of course, with new momentum. Tonight, both courting black voters, and abcs cecilia vega, oneonone with Bernie Sanders, asking, does clintons ground game give her an advantage in and heres what he said. Reporter tonight, a debate stage showdown. The first since Bernie Sanders sweeping New Hampshire win. And the first since the candidates most heated clash. I think its time to end the very artful smear that you and your campaign have been carrying out in recent weeks and lets talk lets talk about the issues. Lets talk about issues. And so lets talk about issues. Lets talk about issues. Reporter sanders and Hillary Clinton hunkered down all day, but their campaigns in overdrive rolling out key africanamerican endorsements with an eye towards the South Carolina primary. In clun on thes in clintons corner members of the congressional black caucus. Georgia congressman john lewis slamming sanders, saying he wasnt on the front lines of the civil rights struggle. But i never saw him. I never met him. I was involved in the sitins, the freedom ride, the march on washington, the march from selma i met president clinton. Reporter but sanders today, winning the support of another civil rights icon, superstar harry belafonte. I think he represents opportunity. I think he represents a moral imperative. Reporter all signs the campaign is moving to a new battlefield. The democratic vote, more than 90 white in iowa and New Hampshire. But in South Carolina, more than half of the democratic vote could come from africanamericans. And in nevada, blacks and latinos could make up a third. But sanders acknowledging clinton has a head start. Shes got the infrastructure, shes got the name, shes got the ground game. I agree. Reporter you bring . Shes ahead of us. But were moving quickly. She was ahead of us in iowa and New Hampshire. But we caught up. And cecilia vega with us now live. Cecilia, Hillary Clinton and Bernie Sanders both fighting hard for South Carolina, and tonight, that states most powerful democrat appears to be torn, choosing his words very carefully . David. Congressman jim cliborn saying that he is undecided in this race. His own family is split. His daughter is for hillary, his grandson is feeling the bern. And listen to this. He says, quote, my heart and head are in different places right now, but we will see. A sign of the tough road ahead for Hillary Clinton. All right, well let the viewers interpret that one. Cecilia vega with us tonight. Cecilia, thank you. To the polar vortex and the arctic air sinking south tonight. The deep freeze on the way for 65 million americans. Subzero temperatures. 20 states, in fact, bracing for record cold and extreme wind chills. Images already coming in tonight. Dangerous roads outside cleveland. Pipes bursting. A water main break in scranton, pennsylvania. Even florida, that car window in melbourne, covered in frost. Lets get right to meteorologist rob marciano, tracking it all, and rob, you were saying, the wind chills with this, going to make it really rough. Reporter its going to be dangerous. Weevil been jammed weve been jammed up in this pattern thats going to release even more cold air. Heat, recordbreaking heat to the west. The great lakes. Saturday, daytime highs, 3 in minneapolis, 11 in chicago. Then overnight saturday into sunday morning, the core of the cold air gets to the northeast. It will be 0 likely in new york. If thats the case, thats the coldest weve seen since 94. Minus 22 sunday morning in new york. 36 below in albany. That is dangerous cold, david. Try not to go outside too much. Certainly protect your pets and check on the neighbors. In the west tonight, a dramatic end to the armed standoff in oregon. The fbi with bull horns and youre about to hear what the protesters were shouting back. All of this in a town taken hostage over a fight over government land. Abcs Neal Karlinsky in oregon tonight with the audio from the final stand. Reporter the final hours of the standoff playing out live over an open phone line. Youre going to come out with your hands up. No, were not reporter a surreal end to a bizarre standoff that began over government control of land in the west. The right reporter three of the final four holdouts finally surrendering this morning. Sandy and sean both have their hands up in the air. Seans holding an american flag. Reporter but inside the federal compound, occupier david fry wouldnt budge. Unless my grievances are heard, i will not come out for liberty than it is to die for it. Dont be a coward like that. A coward. Reporter his list of grievances varied, from taxation issues to this all i needed was marijuana. You guys wouldnt even let me have my marijuana. Reporter but little by little, activist Krisanne Hall got through to him. If everybody says hallelujah, ill come out. Im walking towards them right now. Can i just cry now, gavin . Reporter tonight, those final four are now part of a group of 16 people now under federal indictment after 41 days that wreaked havoc out here. David . Neal karlinsky on the scene from the start. Now, to a breaking headline tonight from georgia. A major prison scandal. Officers raiding this prison, more than 40 current and former guards under arrest at this hour. Abcs senior justice correspondent Pierre Thomas on what they are accused of doing while in uniform to avoid getting caught. Reporter Georgia StatePrison Guards are the ones wearing handcuffs today, busted in an fbi sting, accused of taking bribes from inmates and drug dealers. They allegedly helped up mates get drugs into the prison and helped them transport the drugs through the state, while wearing their uniforms, so that the police would be less likely to stop them. Allegations range from smuggling in contraband, but also using their official capacity as officers to protect what they believe to be drug transactions and drug shipments. Dont overlook anything. Reporter raids like this coming as the fbi and state officials vow to clean out compromised guards and illegal activity inside prison walls. The arrests, the latest example more than 130 inmates, guards and outsiders charged just since september. And Pierre Thomas with us live tonight, as well. Pierre, so, these officers are accused of staying in uniform to go undetected and the inmates had cell phones to run their deals . Reporter david, its stunning. 19 georgia Corrections Officers have been charged with protecting inmates who were using cell phones for outrageous scams, including posing as Law Enforcement officials and demanding demand ing victims pay fines. Pierre thomas again tonight. Pierre, thank you. Now, to a case weve been reporting on right here. A massive and deadly gas explosion that brought down three buildings here in new york city. It caused a sevenalarm fire. Buildings were reduced to rubble. Two people were killed. Well, tonight, four people are now charged with manslaughter, and prosecutors say it was all because of greed. Abcs Ron Claiborne from the scene tonight. Reporter it began with a fiery explosion. Flames engulfing three apartment buildings. And in just a few hours, all of it gone. Displaced. Today, the buildings owner, her son and two contractors were arrested and charged with manslaughter. Accused of tampering with gas lines in their rush to rent apartments for up to 6,000 a month each. When greed guides the decisions and the respect for human life doesnt, this is the result. Reporter nearly one year later, the two people who died are still remembered here at the site. Prosecutors say the contractors illegally rigged the gas lines twice. First, with dangerous flexible supply gas to the apartments above. And later, allegedly tapping into the gas lines of the neighboring building and hiding it all from inspectors. They say the day of the deadly fire, the owners son and the lead contractor went to investigate the odor of gas in they smelled the gas and then they sprinted out of the building, without alerting people in the restaurant. Reporter minutes later, the gas ignited. Had already failed one inspection, and the owners wanted to get those renters in as soon as possible, and not wait for the next inspection. David, those four suspects accused of manslaughter, they pleaded not guilty today. Ron claiborne live right here in new york tonight. Ron, thank you. This evening, the u. S. Coast guard is now inspecting that Royal Caribbean cruise ship, back at port after sailing straight through hurricaneforce winds. Tonight, the passengers now describing the horror. Heres abcs linsey davis. Reporter for passengers onboard this rough and tumble cruise that had some fearing for their lives this is crazy. Reporter renewed meaning has finally come in. Im alive. This is insane. Reporter finally on dry told our robin roberts, anthem of the seas in that storm sunday night felt like being inside a washing machine. Like, robin. It was absolutely terrifying. We were on the third floor with an ocean view and we literally by. Reporter as to why the captain thought it would be safe to sail with those warnings in the forecast, Royal Caribbean could only apologize, saying, what happened this week showed that we need to do better. Were going to figure out what exactly happened and make sure doesnt happen again. Reporter while the coast guard has yet to comment on its inspection of the ship, in a tweet today, Royal Caribbean called the damage minor and confirmed anthem of the seas will set sail again on saturday. David . Linsey davis, thank you. Now, to the economy tonight, and a wild day on wall street. The dow on a roller coaster ride yet again. At one point, plummeting more than 400 points. Then, leveling out somewhat, closing down 254 points. Abcs chief Business CorrespondentRebecca Jarvis tonight on the markets rocked by lower oil prices, while, at the same time, thats leading to 99 cents a gallon in parts of this country. Rebecca . Reporter david, 9 out of 10 stations around the country tonight are selling gas below 2 and its expected prices will continue to fall from here. And take a look at this. Its a station in kansas, now selling gas for 99 cents a gallon. Experts predict there is more where that came from, especially in the midwest, where prices could fall in coming weeks below 1 a gallon. This is great news for consumers, now paying the lowest amount for gas in more than a decade, but it has been a big problem for Energy Companies and energy jobs, and we have seen the Ripple Effect into stocks, as well. David . Rebecca jarvis with us tonight. Rebecca, thank you. There is still much more ahead on world news tonight this thursday. The investigation tonight. Youre about to see the irs agent caught up in an fbi sting. Authorities saying this video appearing to show him taking bribes. The moment, and what he said, leading to his arrest. We also have breaking news this evening on bill cosbys wife. And youre about to see a rescue unfold. Firefighters battling their way whats inside. What they pulled from this building. A moment thats america strong. Lifes simple pleasures. Now its our turn. Im doing the same for my family. Retirement and Life Insurance solutions from pacific life can help you protect what you love and grow your future with confidence. Pacific life. Helping generations of families achieve longterm Financial Security for over 145 years. Im billy, rand i quit smoking with chantix. I had a lot of doubts going in. I was a smoker. Hands down, it was, thats who i was. 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