Thousands. Good evening. Great to have you with us on a busy friday night. Breaking news in the race for the white house. Donald trumps threat late today. The primary i south carotina, donald trump saying he may sue ted cruz himself because he was born in canada. Jonathan karl leading us off. Reporter for a moment, it looked like wed be seeing a kinder, gentler donald trump. I wont use foul language. Im just not going to do it. Reporter trump is now taking his feud with ted cruz to a new level, tweeting this threat. If ted cruz doesnt clean up his act, stop cheating, and doing negative ads, i have standing to sue him for not being a natural born citizen. Cruz is pummeling trump with ads in South Carolina featuring a woman trump tried to force to vera cokings home was all she had left, but it stood in Donald Trumps way. Reporter what the ad doesnt mention the woman did not end up losing her home. Theres more than a little irony in donald accusing someone of being nasty. Reporter cruz and trumps other rivals are now criticizing the e llionaires tendency to do this. I would bomb the [ bleep ] out of them. She got [ bleep ], she lost. Is anybody here worried about the frontrunning candidate shoutingut obscenities in front of children . [ applause ] this is lili what is going on . Reporter jeb bush sounding off today during a forum at South Carolinas most conservative christian university. Theres a reason youre going to see four president ial candidates here t tking to these christian conservatives here at bob jones university. In the primary here in South Carolina, twothirds of the voters here are expected to be evangelicals. Found them more than a little concned about trumps foul mouth. At about when you hear him swear . When he cusses or does dirty things that he doesnt, it just doesnt look christian. Reporter but today, heres Something Else for evangelicals to consider. This actress in a cruz ad hitting marco rubio . Maybe you should vote for more than just a pretty face next time. Reporter well, it turns out shes a porn star. Cruz dropped the ad when he found out. And jon joins u u from South Carolina. Another big debate tomorrow night. Donald trump said he would stop swearing, tone it down, but tonight threatening to sue. Reporter yes, the stakes are especially high for ted cruz. This is a state with a lot of the evangelical voters. He has too prove h hs notust a onehit wonder that can only win in iowa. Jon, thank you. Meantime, on the democratic in particular, africanamerican voters. After the smiles last night, then the fireworks. Senator sanders, asked by the moderatorsrsf he c cld be standing in the way of history in the country. The possibility of the first woman president. Mary bruce in South Carolina with how he answered. Reporter tonight, Hillary Clintons new ad invokes the e rrific Church Shooting in charleston, South Carolina, using the husband of a victim. Somebody called me on the she said, reverend thompson . She said, theres shooting around the church. Ani just dropped the phone. Reporter reverend anthony thompson. His wife Myra Singleton thompson was killed that day. Hillary is really committed to making sure that the guns dont get into the wrong hands. Reporter Bernie Sanders is channeling the pain of another africanamerican family. I was able to see my dad die on national tv. Reporter erica, whose father, eric garner, was killed by police. We need to believe in a leader like Bernie Sanders. Reporter both candidates africanamerican votes. At last nights debate, Something Else. Sanders asked if hes standing in the way of the first woman president. Senator, do you worry at all that you will be the instrument of thwarting history as senator clinton keeps claiming . . I think from an historical point of view, somebody with my background, somebody with my views, i think a sanders victory would be of some historical accomplishment as well. [ applause ] im not asking people to support me because im a woman. Im asking people to support me because i think im the most qualifieie experienced and ready person to be the president and the commanderinchief. [ applause ] and reporter secretary clinton is convinced that wrapping her arms around president obama is a good strategy. Be a better president with race. And lifethreatening cold moving in for 65 million americans, from the plains to the carolinas, subzero temperatures expected to shatter records. Heres linsey davis. Reporter tonight, the lake effect snow machine in full swing. Some spots in western new york getting more than three feet in 24 hours. Abcs indra petersons, in buffalo. Reporter its been a relatively mild winter so far by buffalo standards, but that is about to change. A dangerously cold arctic air mass is moving in tonigh meaning g tomorrow morning wewe could set a 100yearold record. Reporter in minnesota, firefighters already battling negative 10 wind chills. From the midwest all the way to north carolina, the National WeatherService Warning conditions will result in frostbite and lead to hypothermia or death if precautions are not taken. The cold already cauaung damage. A burst pipe in scranton, pennsylvania, turning these in some places, it could feel like 40 below zero this weekend. And at temperatures like that, frostbite can set in in just minutes. David . Linsey davis, thanks to you. Lets get right to rob marciano in new york tonight. Some temperatures not seen in 100 years . Reporter yes, were going to have to protect li and proffer professor property. Cordsetting stuff. Arctic air will be coming down, the peak of it will be sunday morning. These are actual low temperatures. 1 in new york. 6 in boston. And look at the windchills, minus 21 in new york. What we dont need is a storm coming, thats what well get on monday and tuesday. Cities, but will change over to rain. But first, we need to get rob, thank you. In the meantime, breaking develops after a terrifying machete attack in ohio. Law enforcement saying he was known to the fbi. Alex perez with the 911 calls tonight. Somebody pulled out a machete and started stabbing people. Reporter tonight, investigators trying to figure out what triggered an attack in columbus, ohio. How many people hurt . One seriously, hurt very badly. Reporter about 6 00 p. M. Thursday night, at nazareth restaurant. The attacker, storming in with a machete in hand. Just thought to myself, at any moment ill get a knife in my back. Reporter the attacker went table to table. Authorities say he took off in a car, eventually tracking him down and shooting him dead. The attack leaving four people injured, including one critically. The fbi working with investigators trying to figure out a motive. Law enforcement says he was known to the fbi, but wasot under a fullscare investigation. An alarming development, tonight, new fears of a possible link to miscarriage with the zika virus. Two women suffering miscarriages when coming home. Test you can take to check for the zika virus. Heres eva pilgrim. Reporter tonight, a new concern in the fight against zika. The edc confirming two pregnant american women, traveling abroad, contracted the virus, then miscarrrrd when they returned home. Our goal really is to protect pregnant women. Thats the key priority right now. Reporter researchers already seeing a strong link between zika and birth defects of the brain. Now the cdc is looking at whether zika causes miscarriage. Samantha mejia was pregnant when she visited her husbands family in hondura before the travel warning. The biggest thing wasnowing that i was pregnant and hearing alalthe different studies come out. Reporter when samantha came home, she tested positive for zika. She miscarried at nine weeks. The placenta also testing positive for zika. And his sister is pregnant right now, so were very concerned for her and her baby. Reporter david, this latest finding from the cdc highlighting just how little we really know about the zika virus. Researchers say theyre learning more every day. Eva, thank you. Lets get right to dr. Besser. Theres no confirmed connection to the miscarriages, right . Its not proven, but it is suggestive. Its likely, if it can cause some birth defects, it can cause others. And theres a new test . Yes,t will allow us to follow pregnant women and identify those at risk, and should be here by mosquito season. And now to a shooting in glendale, involving two teenagers. The school on lockdown. Students in shock. The girls were found dead, and a both were 15 years old. Its unclear who fired or what the motive or plan was. The aerial pictures of the apparent parents and students evacuating are all too familiar. It was 17 years ago at columbine high school, and tonight, for the first time ever, Dylan Klebolds mother is breaking her silence. Heres diane sawyer with her exclusive. The police were there and the helicopters were going over. And i remember thinking, if this is true, if dylan is really hurting people, somehow, he has to be stopped. And that at that moment, i prayed that he would die. That god, stop this, just make dont let him hurt anybody. Reporter and so her quest begins. She says, she goes back over every year of her life with a magnifying glass. Looking for the path of her sons descent and the clues that she missed. Sometimes he would seem you know, distant or quiet. And i remember asking him, are you okay . Are yoyosure youre okay . You seem so tired. And hed stand up and say, ive got a lot of homework. I just, i need to go to bed. Reporter and you let it go. And i let it go. And thats the difference. If it were me today, i would dig and dig and dig. I felt that i was a good mom. That he would, he could talk to me about anything. Part of the shock of this was the was that learning that what i ielieved and how i lilid and how i parented was an invention in my own mind. That it was a completely different world that he was living in. Reporter she says not a day goesesy she doesnt think of the victims and their families. And reading about them. All these kids and the teacher. And i keep thinking constantly thought how i iould feel if it were the other way around and one of their children had shot mine. I would feel exactly the way they did. I know i would. I know i would. And diane is with us now. 17 years have gone by. Why now . She says it took a long time to stare the truth in the face. Shes been on a quest to understand how she missed what she missed. And shes been talking to experts to try to make sure there may be something useful for another parent. A diane sawawr exexusive. Silence broken, a mothers reckoning, tonight at 10 00 p. M. Eastern right here. Up next, consumer investigation, a warning about something that could be in your garage right now. Our cameras under cover at discount stores. Could it be doing harm to your car . Also, the new headline involving the turf used by so many young athletes. And tim tebow is here tonight, putting football dreams aside to make dreams come true for thousands of children who would not have had the chance to dance. ll be right back. What if one situp could prevent Heart Disease . One. Wishful thinking, right . But there is one step you can take to help prevent another serious disease. Pneumococcal pneumonia. You are 50 or older, one dose of the prevnar 13 vaccine pneumococcal pneumonia, an illness that can cause coughing, chest pain, difficulty breathing, and may even put you in the hospital. 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Reporter our expert tom glenn of the Petroleum Quality institute of america spots this wellknown oil, 10w30. Its cheaper than the others. But look on the back. A warning. Not suitable for engines built after 1988. Thats 28 years ago. And heres another dg oil, 10w40. Theres that same warning on the back. Joe wood says he never thought to read the back of the bottle and that his engine died after he starting using the oil. I didnt think anything was different from any of the brands. Reporter glenn says its not just Dollar General selling obsolete oils. S. We go undercover to other stores. Out of eight other retailers, half were selling oils that glenn considers obsolete. Current oil, look for this starburst seal on the bottle. Older formulations dont have it. As for Dollar General, it told us their products meet not only our standards for quality and value, but contain obvious and unambiguous language regarding the products intended and appropriate use. The company also takes issue with the term obsolete, saying these oils can be used in the millions of cars on the road built before 1988. Gio benitez, abc news, new york. Thanks. When we come back, a surprise for one of our correspondents from the pope. And major news on Barry Manilow tonight. And concerns for children playing on artificial turf. Well be right back. Yep, vern from voya. Why are you orange . Thats a little weird. Reblly . Thats the weird part in this scenario . Lookokorange money represents the money you put away for retirement. Ah, ok. So, why are you orange . Funny. See how voya can help you get organized at voya. Com. Ibsd. You know the symptoms when they start. Abdominal pain. Urgent diarrhea. Now theres prescription xifaxan. Xifaxan is a new ibsd treatment that helps relieve your diarrhea and abdominal pain symptoms. And xifaxan works differently. Its a prescription antibiotic that acts mainly in the digestive tract. 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And Barry Manilow, said to be doing well, after being rushed to the hospital. Suffering complications after surgery. Saying hes been instructed not to talk, sing, or rap. When we come back, tim tebow with a surprise. A gift for thousands of american families. You have to see this. Well be back. Ballllince. Hey, how did he get in here . and with toe nail fungus fight it with jublia. Jublia is a prescription medicine used to treat toenail fungus. Use jublia as instructed by your doctor. Now thats prime time. Application site redness, itching, swelling, burning or stinging, blisters, and pain. You ready to fight it . Ask your doctor if jublia is right for you. Visit our website for savings on larger size. Only miralax hydrates, eases and softens to unblock naturally, so you have peace of mind from start to finish. Love your laxative. Miralax. If you have postmenopausal osteoporosis and high risk for fracture. I can tell you prolia is proven to help protect bones from fracture. 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New robitussin 12 hour delivers fast, powerful cough relief that lasts up to twelve hours. New robitussin 12 hour cough relief. Because its never just a cough. At ally bank, no branches equals great rates. Its a fact. Kind of like grandkids equals free tech support. Oh, look at you, so great to see you none of this works. Come on in. Would like to see people under 17 years of age not allowed to use a tanning bed. Ready for performers. Almost eight years after the flood, a rebuilt Hancher Auditorium will soon be open for audiences and performances. Tonight at 6 finally tonight, tim tebow is here to help us name our persons of the week, young dancers who would have never had the chance to dance. America knows tim tebow on the field. But tonight, what tim tebow is quietly doing off the field. More important than the magazine covers, are the children hes helped along the way. Tebow, born in the philippines, his parents missionaries. He was inspired by children with special needs, who simply needed a champion. Years later, hes now rolling out the red carpet. I want to fight for these people moreso than play football moreso than anything elsin my life. Thats what i want to do. Reporter the Tim Tebow Foundation sponsoring whats called the night to shine, prom night tonight for young people who otherwise wouldnt get the chance. 72,000 volunteers, 32,000 the prom tonight. Thank you for the flowers. Reporter just listen to colin. For him to come here to share all that with us i think he cares about us. Reporter in new york city, volunteers getting ready for tonight. I get so choked just thinking about it. Youre special and important. Lets have so much fun tonight, okay okay . [ applause ] reporter arm in arm. Walking them in. Ready for the dance. So many smiles, so many twirls. A night to shine for thousands. And so we choose all of the young dancers given the night to ine. Thank yoyo for watching. The more we can protect minors in the state of iowa, the better another attempt. Supporters of a bill to get minors out of tanning beds will try again with iowa lawmakers next week. Some overnight shelters in dubuque say overnight volunteers. One iowa lawmaker is workrkg to get rid of the states public intoxication laws. Ill have all the details coming up in a live report. Youre watching kcrgtv9. Now, from your 24 hour news source, this is kcrgtv9 news at 6. Its common this time of year for people to use tanning beds before a winter vacation, spring break, or maybe even an upcoming prom. But a bill in an iowa house subcommittee would ban minors from using uv tanning beds. Last year, the iowa Senate Passed a similar bill, but it didnt become law. This year, a house subcommittee decided to take up the bill, but lowered. The age limit from 18 to 17 years of agag kcrg tv nines Dave Franzman joins us now. Dave, cancer survivors and families plan to meet with lawmakers next week . Beth, a group of abobo 100 from converge on des moines tuesday to lobby for a bill that would get minors out of the tanning beds. This is the third year in a row theyve made a legislative push for a tanning bed ban for those under 18. Only 8 states, including iowa, still allow minors to risk skin cancer by using indoor tanning devices. So with recent legislative progress theyre wondering if this is finally the year. When 27yearold andrea ard talks to lawmakers about melanoma and tanning beds, shes liable to reach for her phone. She has photos of the scars from three surgeries to remove her skin cancer two years ago. She started tanning as a 16yearold, with parental permission, and did it as often as five times a week. And if she could turn back the clock. I would tell myself not to put my body through that. T. You need to look into he health risks and at that age all you think about is the social pressure ard will join the cancer society