And its great to be with you on this monday night. And as we begin this week together, americans from north to south in this country, are starting to feel a new arctic freeze. And you can see it happening in the windy city already. The chicago waterway, an Obstacle Course of ice. And even if you travel south 500 miles to tennessee, a frozen waterfall. Weve been telling you a lot about the cold this winter. But heres whats different tonight. This arctic blast is driving as far south as texas and florida. And they could both get hit by treacherous snow and ice. And our extreme weather team is ready to show you how cold it will get, how fast. Abcs alex perez starting us off. Reporter this is the battle millions are facing across a frozen midwest. Blowing snow and dangerous whiteout conditions, shutting down roads, making cars just disappear. In kankakee, illinois, this bus sliding right off the road. In parts of colorado, pileup after pileup. 27 states are coping with brutal, dangerous windchills tonight. In chicago, the Public Schools 400,000 students told to stay home today and tomorrow. Across minnesota, schools closed due to plunging temperatures. Snowcovered minneapolis feels like 26 below zero. I dont like it. Reporter in rural minnesota, the propane that ron selleck expected would keep his house warm until march nearly finished friday. Shes a mean winter. Reporter his home down to 40 degrees at 1 point. Relying on layers, space heaters and an electric blanket just to survive. That electric blanket maybe saved you a couple nights . Oh, for sure. Reporter hes one of millions of americans who rely on propane to stay warm. Facing a nationwide shortage and surging prices, he had to turn to the Salvation Army to help him buy fuel. Last month, how much were you paying a gallon . It was 2. 39. Reporter 2. 39. This month . 4. 89. Reporter another big problem, the relentless snow. Indianapolis on track to have the snowiest january since is the civil war. In chicago, four feet of snow since november, more than the city usually gets all season. In alaska, aboveaverage temperatures are the problem, triggering this massive avalanche, blocking the only road that leads to the town of valdez. Food is being shipped to the town by barge. The snow, ice and cold in the midwest now moving south. In alabama, theyre salting roads and preparing for the worst. Were not geared up to do 1,000 miles of road if they ice up. We just have to close the roads. Reporter and that ice, still a big concern here in the midwest. It seems to be just about everywhere. And were actually standing near minihaha falls tonight. And as you can see, diane, tonight, completely frozen over. Diane . Strangely beautiful, too. Thank you, alex. I want to bring in abcs meteorologist, ginger zee, for a look ahead. Ginger . Theres winter storm warnings that have just gone up, from texas to far southern maryland. And warning means its imminent. Happening now. Snow and ice. And how much we expect tomorrow. Thats tuesday into wednesday, for most folks. That low slides across. It is plenty cold. And we are in that threeinch to sixinch range in the white. Anywhere pink or maroon, thats more than a halffoot of snow. And then, there will be the ice. This will make it extra messy, especially from southeastern georgia up through south and north carolina. Something were going to be watching, especially for these towns that just arent used to it. They either dont have plows or salt. Or places like houston just have sand to put on some of the icy places. For a moment, ginger, look ahead to the super bowl. Are you still predicting temperatures in the 30s . Yes. It looks like the moderating trend gets on by the end of the week. Were fortunate were not having the super bowl tomorrow or wednesday. All right. Ginger zee, we thank you and the entire extreme weather team. We move, next, tonight, to a mystery the cdc is scrambling to solve. How did a giant cruise ship, become a kind of floating petri dish . Hundreds of passengers sick with a virus that moved from decktodeck like lightning. The cruise ship with a lot of miserable americans onboard. Vacations ruined. Abcs linsey davis. Reporter the cruise line promises relaxation, fun and entertainment. Prepare to be truly amazed. Reporter but instead for 3,000 passengers tonight high anxiety on the high seas. It just felt like one of the worst stomach bugs i have ever had in my life. Reporter passenger arnee dodd is just 1 of the more than 600 people on the Royal Caribbean explorer of the seas, whove become violently ill. Everybody was so nervous they were either staying to their state rooms or a public place that wasnt too crowded. Reporter Officials Say this is likely a case of the highly contagious norovirus, which probably came onboard with a sick person or in contaminated food. If it arrived in, say, contaminated seafood, not only would everyone who ate the fish likely get sick, but the virus could spread to those who handled the fish and to anyone who touched the ice it was served on. Norovirus survives on surfaces and on hands. So, once it leaves the dining room, it can spread exponentially throughout the ship. The crew, sporting hawaiian shirts and sanitation masks, is scrubbing and disinfecting the ship from top to bottom. Why is the norovirus so difficult to contain . It is able to survive in the environment for days, for weeks, sometimes for months. Reporter cdc inspectors are onboard. In a statement, Royal Caribbean said, we think the right thing to do is to bring our guests home early. Linsey davis, abc news, new york. And back here, on land, as we do count down to the super bowl this sunday, hundreds of thousands of people are already coming to new york and new jersey. But with every big sporting event, there is something in the shadows. Sex trafficking. And tonight, a counterattack, as all of us are being asked to help and to step in. And heres abcs Senior National correspondent, jim avila. Reporter these flight attendants and airport workers, training to recognize sex traffickers among the thousands heading to the super bowl. Criminals, transporting women and children to new york, against their will. Not for the biggest weekend in football. But for the biggest weekend in prostitution. Any major event where theres going to be a lot of men, a lot of money and a lot of alcohol, theres going to be a an increase in demand for commercial sex. Reporter the number of prostitution ads on new york websites jumped by 50 over the weekend. Expected to triple by sunday. So, today, a counterattack. New billboards in times square. At Madison Square garden. And videos played in major train and bus stations. Its time to open our eyes. These are places we know that victims end up. They will see these billboards. They know someone is out there to help them. Reporter the training works. In boston, a child prostitution ring smashed. 86 children freed after an Airline Worker noticed a man traveling with 2 crying children. We caught a dozen. Reporter all because the Airline Worker had been trained to look for telltale signs. Someone who doesnt have control of their own i. D. S. Someone appearing under the control of another. Someone who looks lost. Its better to be a little nosey and be wrong than to let a victim walk out of your life. Reporter airlines, amtrak and hotels on the lookout this super bowl weekend, for the young and exploited. Most, totally unaware of the big game. Jim avila, abc news, washington. And next, the latest, tonight, on the other big games. The olympics. Today, another terror warning, a new assessment. And this one, from British Security services. The bbc reporting their conclusion that, quote, a terror attack is very likely before or during the olympics. And today, there was no better symbol of the confounding danger than this. Look, the olympic torch being carried through the capital dagestan, a hotbed of extremism, thought to be the most dangerous of the regions near the olympic site. And now, we turn to the groundbreaking news right here at home today. From yale university, about American Children and guns. Every hour, a child is rushed to the emergency room because of gunshots. And abcs anchor, david muir, is here on a story weve been working on together for nearly a year. David . Thats right, diane. The two of us teaming up and traveling across this country. And this evening, on the eve of our special report, young guns, later this week, the numbers reported in the journal pediatrics. Looking at children and guns. The most recent statistics from 2009. And take a look, tonight. They are eyeopening. The new numbers are arresting. Nearly one child or teenager every hour, injured by a firearm in this country. The study, tonight, revealing that 7,391 children rushed to the hospital every year with those gun injuries. So often, accidents in the home. 453 of those children die at the hospital. Youve seen it often when its an accident inside the home. Yes, i have. And its devastating. Reporter dr. Robert glatter of lennox hill hospital of new york, has spent many years in the e. R. At one point, the doctor himself, saying he was seeing gunshots in children twice a week. He says this new window into the e. R. , into the horror seen with children and guns, hes been witnessing firsthand for some time. These are gunshot wounds that have happened inside the home, generally . Theyre a result of accidents where a gun safe is left unlocked. And teens and children gain access. Reporter tonight, the authors of the study calling this a National Public health problem. And for nearly a year, abc news has traveled coasttocoast, into neighborhoods where the numbers tell us one in three homes in america have a gun. 1. 7 million children live in a home with an unlocked and loaded firearm. And as part of our reporting, an experiment. We turn to the very parents who say theyve taught their children gun safety. Those parents agreed to take part at an Elementary School in st. Petersburg, florida. Seven hidden cameras. And for half the kids, reinforcing the message with a teacher. Who shows them the nras eddie eagle tape, guiding them through the program. Stop. Dont touch. Leave the area. Tell an adult. Reporter and the police come in with a gun safety class, repeating the message. And just listen to the children who have it down. Stop. Dont touch. Leave the area. Tell an adult. Reporter just a few days later, the police come in to place two real, unloaded guns inside the classroom. The teacher running the experiment, telling the children, theyre there for a memory test. And she has to go for a second. But theres candy on the table. Among the pairs of children, william and griffin there, in their case, ten minutes after this. Dont mess with it. Reporter there is this. One child looking down the barrel of the gun. I cant see. I told you. Reporter his friend, about to do the same. Im just seeing reporter both of them, already having looked down the barrel by the time they call an adult. Help . Help . Help . Help . Help . Anyone . We found a gun. Two guns. I mean, three. Two guns. Reporter from a control room, the professor and the police watching. Its a natural thing to look down the barrel. Reporter and the parents who agreed to it all were watching it, too. Oh, my god. Reporter that was just the beginning of the experiment. Friday night, youll hear from the parents. The children watch the video with them. And, diane, you begin the conversation friday night about whether or not parents out there ever really ask the neighbors or their friends parents if theres a gun in the home, whether its locked, loaded or put away. We want to hear from everyone, joining forces together on all sides of this issue. Thank you, david. Also, big news, tonight, about Hillary Clinton. Today, the former secretary of state expressed regret over the tragedy that cost 4 americans their lives in benghazi, 16 months ago. So, what did she say . And what does it mean if she runs for the white house in 2016 . Abcs chief white house correspondent, jonathan karl, right now. Reporter Hillary Clinton was asked, today, if she would have any doovers from her four years as secretary of state. Without hesitation, she pointed to benghazi, the attack that killed four americans, including our ambassador to libya. My biggest regret is what happened in benghazi. It was a terrible tragedy. Reporter benghazi has also become a political issue. Republicans saying, it is Hillary Clinton who ultimately bears responsibility for the breakdown in diplomatic security. Although she called the attack her biggest regret, it wasnt exactly a mea culpa. You make these choices based on imperfect information. And you make them, to, as we say, the best of your ability. That doesnt mean that theres not going to be unforeseen consequences. Unpredictable twists and turns. Reporter over the past week, two major magazine cover stories have treated Hillary Clinton like the allbut certain democratic candidate for president in 2016. But today, she said, that she isnt even thinking, yet, about whether she will run. Hillarys comments came before a group of car dealers. In a lighter moment, she admitted to them, she hasnt driven a car for almost two decades. The last time i drove a car myself, was 1996. And i remember it very well. And unfortunately, so does the secret service, which is why i havent driven since then. Reporter quite a thing to say. Especially before a bunch of folks who sell cars for a living. Jonathan karl, abc news, washington. A long time ago. And up next here tonight is there one way to protect yourself from a sneeze . With a cold or the flu . Is it in the hand . The arm . Or Something Else . Were going to show you in the lab, in just two minutes. Stay with us. Eed when you retir . Then we gave each person a ribbon to show how many years that amount might last. I was trying to, like, pull it a little further. [ woman ] got me to 70 years old. Im going to have to rethink this thing. Its hard to imagine how much well need for a retirement that could last 30 years or more. So maybe we need to approach things differently, if we want to be ready for a longer retirement. Legs, for crossing. Feet. Splashing. Better things than the joint pain and swelling of moderate to severe rheumatoid arthritis. If youre trying to manage your ra, now may be the time to ask about xeljanz. Xeljanz tofacitinib is a small pill, not an injection or infusion, for adults with moderate to severe ra for whom methotrexate did not work well. Xeljanz is an ra medicine that can enter cells and disrupt jak pathways, thought to play a role in the inflammation that comes with ra. Xeljanz can lower your ability to fight infections, including tuberculosis. Serious, sometimes fatal infections and cancers have happened in patients taking xeljanz. Dont start xeljanz if you have any kind of infection, unless ok with your doctor. Tears in the stomach or intestines, low blood cell counts and higher liver tests and cholesterol levels have happened. Your doctor should perform blood tests before you start and while taking xeljanz, and routinely check certain liver tests. Tell your doctor if you have been to a region where certain fungal infections are common, and if you have had tb, hepatitis b or c, or are prone to infections. Tell your doctor about all the medicines you take, and if you are pregnant, or plan to be. Taken twice daily, xeljanz can reduce the joint pain and swelling of moderate to severe ra, even without methotrexate. Ask if xeljanz is right for you. And next, here, tonight, a kind of enemy traveling through the air all around us, every sneeze, that can give you cold or flu. So, is using your hand with the sneeze, or an arm the best way to stop it . Abcs chief medical editor, dr. Richard besser, shows us Something Else that really works. Reporter on the flu season battlefield, everyone around you is a potential enemy. Firing their germs like ballistic missiles. We set out to answer once and for all, how can you best stop your sneezes . And not get everyone around you sick . Is it with your hands . Or into your elbow . We put together a demonstration. Laid down a long paper ruler, set up highspeed cameras, and rinsed our mouths with food coloring so we could see where the sneezes landed. We put on protective suits to keep the dye off our clothes. And did everything we could to incite a sneeze. I even sniffed cat hair off my producers scarf. Im very cat allergic. I couldnt sneeze. But two of my producers, elara and marcus, found a way. Tickling their noses with these leaves. And were off. Round one. Marcus plays the rude guy, sneezing without blocking at all. Look at that dye. We found a small part of it landing almost 11 feet away. Round two. Elara covers her mouth with her hands. Just like mom always said. She cant block it all and some of it landed 3 1 2 feet away. And look at all of that on elaras hand. Disgusting. Round three. What about that newer move weve been advised to use, the dracula sneeze, into your elbow. Better. But look how much is still getting through. Parts of that sneeze landed 8 1 2 feet away. So, if youre spreading germs sneezing, even when covering your mouth and sneezing into your elbow, is there anything you can do . Grab a tissue. Believe it or not, with marcus sneezing right into the tissue, we found nothing getting through. Nothing. There you have it. Gesundheit. Heres to the humble tissue and dr. Rich besser reporting in. And next here, someone with a great record of predicting the super bowl gives you the secret of whos going to win this year. To prove to you that aleve is the better choice for him, hes agreed to give it up. Thats today . [ male announcer ] well be with him all day as he goes back to taking tylenol. I was okay, but after lunch my knee started to hurt again. And now ive got to take more pills. Yup. Another pill stop. Can i get my aleve back yet . For my pain, i want my aleve. [ male announcer ] look for the easyopen red arthritis cap. 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Is your tv powered by coal . Natural gas . Nuclear . Or renewables like solar. And wind . Lets find out. This is where americas electricity comes from. A diversity of Energy Sources helps ensure the electricity we need is reliable. Take the energy quiz. Energy lives here. Our instant index tonight, begins with a big surprise. Really big. Eight tons. Five friends on the trip of a lifetime, on safari, in zimbabwe, and see who photo bombs them . An eightton elephant. The ladies oblivious until they nearly got a hug from their new friend. And are you meticulous . Good a at highquality cleaning . Able to maintain confidentiality . We have a help wanted ad for you. The queen is looking for a new housekeeper. Theres an ad on the royal website. The new hire will run royal baths, serve tea, assist with dressing and looking after jewelry. Shes got some serious jewelry. 40 hours a week. Starting salary, 14,400 pounds, which is 27,000 u. S. And this would be your new office, inside Buckingham Palace somewhere. And the countdown to the super bowl is on. And today the masterminds behind the video game sensation madden 25 tried to predict what will happen on sundays big game. As they dream it played in a blizzard. Denver pulls out the win in overtime, a squeaker. Broncos 31, seahawks, 28. And their prediction, has been right eight out of the last ten super bowls. Coming up next, the big buzz from the grammys. The mystery men under the helmets. Have we solved that mystery . And also, did this couple win something bigger than a grammy . [ male announcer ] the rhythm of life. [ whistle blowing ] where do you hear that beat . Campbells healthy request soup lets you hear it in your heart. [ basketball bouncing ] heart healthy. [ mm. ] great taste. [ tapping ] sounds good. Campbells healthy request. Mm mm good. ® campbells healthy request. So when my moderate to severe chronic plaque psoriasis them. Was also on display, id had it. I finally had a serious talk with my dermatologist. This time, he prescribed humiraadalimumab. Humira helps to clear the surface of my skin by actually working inside my body. In clinical trials, most adults with moderate to Severe Plaque Psoriasis saw 75 skin clearance. And the majority of people were clear or almost clear in just 4 months. Humira can lower your ability to fight infections, including tuberculosis. Serious, sometimes fatal events, such as infections, lymphoma, or other types of cancer have happened. Blood, liver and nervous system problems, serious allergic reactions, and new or worsening Heart Failure have occurred. Before starting humira, your doctor should test you for tb. Ask your doctor if you live in or have been to a region where certain fungal infections are common. Tell your doctor if you have had tb, hepatitis b, are prone to infections, or have symptoms such as fever, fatigue, cough, or sores. You should not start humira if you have any kind of infection. Make the most of every moment. Ask your dermatologist about humira, today. Clearer skin is possible. Afghanistan, in 2009. Orbiting the moon in 1971. [ male announcer ] once its earned, usaa Auto Insurance is often handed down from generation to generation. Because it offers a superior level of protection. And because usaas commitment to serve current and former military members and their families is without equal. Begin your legacy. Get an Auto Insurance quote. Usaa. We know what it means to serve. And finally, tonight, we did some detective work today on the mysteries of the Grammy Awards last night. Those guys in the helmets, that hat . And beyonce, with jay z. Abcs nick watt takes us behind all of the buzz. Reporter beyonce and jay z, no questions asked, brought the house down. Beyond that, theres a lot of postgrammy head scratching. Get lucky, daft punk. Reporter daft punk the french dance duo who won big, never leave home without their helmets. What do they actually look like . In the flesh, 20 years ago. The helmets are a slice of pop theatrics and they told rolling stone, were not models. It would not be enjoyable for humanity to see our features. Come on. Theyre hardly hunchbacks of notre dame. On behalf of the robots reporter also, whats with pharells rocky and bullwinkle chapeau that launched a thousand memes and tweets . Arbys claimed it as their own and pharell shot back, yall tryna start a roast beef . And the hat . Its a vivienne westwood. Seen on Malcolm Mclaren circa 1982. Who chose the 33 straight and gay couples married to the sound of same love . A casting agent of course. This is l. A. Among them, a pair of whose flash mob proposal in a home depot, already has gone viral. And now, without due reporter queen latifah, with the requisite legal permission, officiated. And katy perry caught the bouquet. Nick watt, abc news, los angeles. And thank you so much for watching tonight. Always here at abcnews. Com. And nightline later. And we hope youll join us tomorrow, in washington, for world news and the state of the union tomorrow night. Ill see you then. Who is responsible when the driver of a car service gets into a accident . A bay area teacher accused of bricki bricking bringing pot to a potluck and a creek now inhabited by beavers and efforts to make them feel at home. This is the scene of a new years eve pedestrian accident where a 6yearold girl was killed in the crosswalk. Should a ride service being held responsible for actions of the driver when there is no passenger in the car . That question is the focus of a lawsuit. A 6yearold hit crossing street with her mom and brother in the tender loin district. Abc7 News Reporter is live with the story ht. This suit is intended to force uber to insure drivers by the way, the driver involved in that accident has in the been charged. The District Attorney is still investigating the case. A new years eve this honda suv driven by a 57yearold. Police say he hit a 6yearold sophia lu, killing her. He worked for the on demand car service, uber. He was using his uber app looking to find a fare. Having that app there as a gps is using the uber app the mother is seen theer month. She suffered broken bones and her eyes were swollen shut. Her 5yearold son was also injured. I cannot save her life. The driver killed her. The suit claims