system for public business. it is the last thing she needs, three days before iowa. nancy cordes is with clinton tonight, on the campaign trail. >> hello, everybody! >> reporter: just before clinton took the stage in dubuque, state department spokesman john kirby announced that seven e-mail chains from her private account, totaling 37 pages, were being upgraded to top secret. >> in consultation with the intelligence community, we are making this upgrade, and we believe it's the prudent, responsible thing to do. >> reporter: top secret is one of the highest levels of classification, reserved for material that, if released, would cause exceptionally grave damage to the national security. the e-mails resided on clinton's private server at her home in chappaqua, new york, for years, until she turned over 55,000 pages at the department's request. >> i did not e-mail any classified material to anyone on my e-mail. >> reporter: in a statement today, her campaign called the move "over-classification run amok," the result of "bureaucratic infighting," arguing, "in at least one case the e-mails appear to involve information from a published news article." kirby would not share the topic of the e-mails or whetherhe clinton was the sender or receiver. >> i'm not going to get into debating or discussing candidates one way or the other on the campaign trail. >> reporter: he said the e-mails will be withheld from public view and not blacked out piecemeal, like hundreds of other clinton e-mails that have already been released. the clinton campaign argues these e-mails should be released, at least in part, but an intelligence official tells cbs news that some of the information in them is so sensitive, scott, that clinton and her aides should have known never to discuss it over an unsecured system in the first place. >> pelley: nancy cordes on the road in iowa. nancy, thank you. 12.5 million people watched last night's trump-less republican debate. that is the second smallest audience for a g.o.p. debate this season. nearly four million watched donald trump's counter-event. and here's major garrett. >> you have to stick up for your rights. ( cheers and applause ) you have to do it. >> reporter: at his event last night, donald trump admitted he wasn't sure if his political gambit would pay off. >> is it for me personally a good thing, a bad thing? will i get more vote, will i get less votes? nobody knows. nobody knows. who the hell knows? >> i'm a maniac and everyone on this stage is stupid, fat, and ugly, and, ben, you're a terrible surgeon. now that we've gotten the donald trump portion out of the way-- ( laughter ) >> reporter: just miles away at the fox news debate, ted cruz poked fun at the missing g.o.p. front-runner, but he quickly found himself under heavy fire. the central topic-- immigration and the definition of amnesty. senator rand paul: "oh, you're for amnesty. everybody's for amnesty except for ted cruz." but it's a falseness and that's an authenticity problem. >> reporter: marco rubio, hoping to finish third here, had some of the fiercest clashes with cruz. >> this is the lie that ted's campaign is built on. the truth is, ted, throughout this campaign you have been willing to say or do anything to get votes. >> marco made the choice to go the direction of the major donors to support amnesty because he thought it was politically advantageous. >> who's got the best personality? >> reporter: trump took a detour to new hampshire, and urged supporters, especially the unemployed, to vote. >> get up and vote. i will get rid of your depression. you'll be happy. you'll be happy. >> reporter: iowa's republican governor terry branstad told us today, g.o.p. turnout monday night could be 30,000 higher than the previous record. scott, the governor said trump, who has drawn impressive crowds in democratic strongholds here, would likely be the biggest beneficiary. >> pelley: major garrett, john dickerson, our cbs news political director, sat down with donald trump today for a "face the nation" interview. >> reporter: some veterans groups have said that you used the veterans as part of a political stunt, that you were, you know-- >> i haven't even seen that. i haven't seen hat. we were so-- they were so happy we had tremendous numbers of vets. why would they be against raising money? >> reporter: well, i guess the idea is you were offended by fox, wanted to get-- you know, not be in the debate, and then you concocted the veterans thing kind of as an afterthought. >> i mean, i can tell you the vet groups we dealt with are so happy and they are going to be splitting up $6 million. that's pretty good. >> reporter: 22 organizations. wounded warriors is not on the list of the 22 you're giving to. why not? >> i saw some stories, i think on cbs, actually, and i think i want to give it a little pause until we find out whether or not that stuff is correct. i look very carefully as to expenses and what things are costing and how they allocate their money, and i like to see nice, low numbers in terms of those numbers were pretty high. >> pelley: and john is joining us now from washington. john, where do these races stand the weekend before the caucuses? let's start with the republicans. >> well, on the republican side, the question is whether donald trump will break yet another rule of politics. iowa is supposed to be a retail state, and ted cruz has campaigned in 99 counties and is following the state-of-the-art science of voter turnout. trump, on the other hand, his campaign threw vast rallies and the two are pretty close as we go to the finish line and now we will find out which strategy will pay off. >> pelley: by retail state, we mean going door to door. john, what about the democrats? >> on the democratic side, bernie sanders is the one having the emotional reaction from voters of the kind donald trump is seeing. and iowa democrats love an insurgent candidate, but hillary clinton has been organizing the state vigorously from the start. she wasn't going to be surprised this time, the way she was in 2008 by barack obama. but despite all that be a surprise on caucus day. >> pelley: and you will have the very latest on "face the nation" on sunday. john, thanks. you just heard donald trump mention our cbs news investigation of the wounded warrior project, which exposed lavish spending for parties and conventions. well, today, charity navigator, a national evaluatorf charities, put w.w.p. on its "watch" list. documents have bubbled up in flint, michigan that show state workers were provided bottled water long before the residents were. and here's adriana diaz. >> reporter: a year ago, while flint residents were told their water was safe to drink, despite the taste and foul odor, water coolers were delivered to flint's state office building. newly released e-mails from january, 2015, show that the state was concerned about its employees drinking flint water. the e-mails were sent days after the city told residents the water contained high levels of a chemicals. the city's notice said, "you do not need to boil your water or take other corrective actions." and that the water was drinkable. but the state told its employees in flint that, in a radio interview this afternoon, governor rick snyder addressed the issue of state workers getting coolers. >> reporter: we asked flint residents what they thought about the e-mails. >> last when? >> reporter: january. >> january. a year ago? that's sad. very sad. >> reporter: what will it take for to you regain trust in the state? i really have no idea. >> reporter: that bad? >> yup. >> reporter: scott, the department that delivered the water coolers to the building behind me, told us that the water was for the benefit of both the employees who worked there as well as flint residents who received services inside. >> pelley: adriana, thanks. now, the main problem in flint was lead contamination, and it turns out that is a concern across the country. in new orleans, water flows through lead pipes that were installed 100 years ago. and manuel bojorquez is there. >> reporter: rachel depauw says she's done as much as she can to protect her daughters against the dangers of lead, repainting the walls of her 1930s new orleans home and trying not to track dirt inside. >> you want to give her a bite, honey? >> reporter: but in 2014, tests showed three-year-old phoebe had nearly three times of level of the centers for disease control depauw had her water and soil tested. >> when you can't count on basic infrastructure like water being scary. >> reporter: water tests in depauw's home confirmed the presence of lead, 8.5 parts per billion, that's still below the that's still below the 15 parts per billion the environmental protection agency considers safe. but scientists like adrienne katner from louisiana state university, questioned the numbers. >> there is no safe level of lead. the evidence is mounting that there is neuro-cognitive impacts on a child, behavioral impacts. >> reporter: the most recent lead testing in new orleans was in 2014. there are 137,000 water customers. the state requires just 53 homes be tested, and only one was found unsafe. but katner says in her independent testing, out of 151 sites so far, she's found 12 with unsafe levels. >> 1,500 miles of water lines. >> reporter: cedric grant is executive director of the city's water board. >> we are doing everything we can with one of the most the south. >> reporter: grant said the water leaves the plant lead- free, but once it exits city pipes it may travel through lead pipes to people's homes. after that, the water quality is left up to the homeowner. >> i am not responsible for what goes from the meter to them. i'm ready to assist. i'm ready to provide information. >> reporter: so it falls on the customer. >> it's the customer's responsibility at that point. >> reporter: in new orleans and other cities, corrosion-control chemicals are added to the water to try to keep the lead out of homes. and, scott, the e.p.a. is considering a change that would make utilities share the burden with customers of replacing some of the nation's estimated 10 million lead service lines. >> pelley: manuel bojorquez, thank you, manuel. today, we learned that a chicago cop charged with murdering a black teenager may ask that his trial be removed from the city. it has also been revealed that officer jason van dyke's dash- and our dean reynolds has found, that's happening a lot in chicago. >> reporter: there was something missing from these dashboard videos of fatal police shootings in chicago. there was no sound. and though almost all chicago squad cars have video and audio recorders in the dashboards, an analysis of police maintenance logs by the web site d.n.a. info chicago, indicates silent tape is not unusual. the analysis, which was not disputed by police officials, found microphones stashed in glove boxes, batteries removed, and antennas damaged on purpose. john escalante, the interim superintendent of police, says technical problems or human error can happen at any time. >> but there are other times it's deliberate. people deliberately trying to circumvent the system. >> reporter: in the october 2014 shooting of laquan mcdonald, none of the five cruisers on the scene recorded audio when officer jason van dyke shot escalante concedes on any given day about 12% of the recorders need to be fixed, but intentional destruction will be met with reprimands or suspensions. dean angelo of the police union blames aging equipment and not the cops. >> some of those things have been in disrepair for a long time. and to now come down on the individual operators of the vehicle and say they've done something to it, i think is a bit arbitrary. >> reporter: do the officers feel as though the public is breathing down their necks? >> there is some concern that officers don't want to be the next viral video. >> reporter: but their exposure is about to increase. this spring, police in several districts will be wearing new body cameras as part of a pilot program that, if successful, could spread to the whole force. dean reynolds, cbs news, chicago. >> pelley: walmart came and then left, leaving a lot of towns without a grocery store. evening news continues.eviously treated with platinum-based chemotherapy, it's not every day something this big comes along. a chance to live longer with... opdivo, nivolumab. opdivo is the first and only immunotherapy fda approved based on a clinical trial demonstrating longer life... ...for these patients. in fact, opdivo significantly increased the chance of living longer versus chemotherapy. opdivo is different. it works with your immune system. opdivo can cause your immune system to attack normal organs and tissues in your body and affect how they work. this may happen any time during or after treatment has ended, and may become serious and lead to death. see your doctor right away if you experience new or worsening cough;chest pain; shortness of breath; diarrhea; severe stomach pain or tenderness; severe nausea or vomiting; extreme fatigue; constipation; headache; confusion; hallucinations; rash; or muscle or joint pain, or flushing as this may keep these problems from becoming more serious. these are not all the possible side effects of opdivo. tell your doctor about all your medical conditions including immune system problems or if you've had an organ transplant, or lung, breathing or liver problems. a chance to live longer. ask your doctor if opdivo is right for you. bristol-myers squibb thanks the patients and physicians who participated in the opdivo clinical trial. get fast-acting, long-lasting relief from heartburn with it neutralizes stomach acid and is the only product that forms a protective barrier that helps keep stomach acid in the stomach where it belongs. for fast-acting, long-lasting try gaviscon . it's just a cough. if you could see your cough, you'd see just how far it can spread. robitussin dm max soothes your throat and delivers fast, powerful cough relief. >> pelley: economic growth sl >> pelley: economic growth slowed sharply in the fourth quarter of last year to just 0.7%, down from 2% in the third quarter. walmart laid off about 10,000 workers this month as it closed 154 stores in 27 states. many of them were the only place to buy groceries. here's david begnaud. >> reporter: shopper tabetha snow watched as the front doorser to her walmart neighborhood market were covered last night. >> in the big cities you know there's a grocery store on every corner. they don't get what small town living is like and how important having a grocery store here is. >> reporter: america's biggest private employer is pulling out of whitewright, texas, just a year after opening here, leaving this town of 1,700 people without a grocery store for 22 miles. >> they didn't even celebrate a year anniversary... that's crazy. >> reporter: retha thompson has two daughter-in-laws who worked at this walmart. >> they chose to come here, and then when they put the other grocery store out of business, they want to close down and leave. i'm mad. >> reporter: pettits was the mom and pop grocery for nearly 60 years. it closed nine months after walmart opened here. larry deeds was co-owner. what made you close? >> the business. they just quit coming. >> reporter: walmart stole your business. >> yeah. >> reporter: but deeds doesn't lay all the blame at walmart's door. >> walmart didn't make pettits close. you people that quit coming, made pettits close. >> reporter: deed says he has nos plans to reopen. where are you going to buy your groceries now? >> i don't know. it won't be walmart. i'm done with walmart. >> reporter: scott, the 35 employees who worked here were given two options-- keep your job and relocate to another >> pelley: david, thanks. still ahead, steve hartman, but up next, a break in the hunt for three fugitives. our cosmetics line was a hit. the orders were rushing in. i could feel our deadlines racing towards us. we didn't need a loan. we needed short-term funding fast. building 18 homes in 4 months? that was a leap. but i knew i could rely on american express to help me buy those building materials. amex helped me buy the inventory i needed. our amex helped us fill the orders. another step on the journey. will you be ready when growth presents itself? >> pelley: one of three men who escaped from a maximum security jail in southern california is in custody. bac duong surrendered in santa ana. as they were awaiting trial for violent crimes. surf's up in hawaii. el nino has kicked up some of the biggest waves in 15 years. 40 and 50 footers. wipeout of the week goes to tom dosland. he was nearly eaten by a monster wave at the maui surf spot that's known as "jaws." you may remember the jaws of a groundhog caught the ear of a small-town mayor last year. and it's next.sexually assaulting her own kids. coming up at six... why those children are now asking for leniency... when it comes to their mom's sentencing./// > after dr. phil -- the raiders scout team >> pelley: big holiday coming up tuesday, and therein lies a tale steve hartman found in the shadows of sun prairie. >> reporter: when you think of groundhog day, you probably don't think of sun prairie, wisconsin. but there's as much passion here as punxsutawney. they've got a wooden woodchuck in the town square. the local bakery sells groundhog cakes. in fact the only thing they're missing is a real groundhog. this was the sun prairie groundhog. you may remember him from lastma year, when then-mayor jon freund lent him his ear, and he took it. >> he says-- that-- uh-- that he, uh-- didn't see a shadow. >> reporter: shortly after mayor's ear, the sun prairie groundhog chewed his way through a metal cage and escaped. naturally, the town wanted a replacement woodchuck, and who wouldn't, if a woodchuck could be found, which apparently is easier said than done. >> you cannot capture it to exhibit it. >> reporter: ti gauger is sun prairie's groundhog day event planner. >> memorabilia from groundhog days past. >> reporter: she says they started celebrating here in 1949, using groundhogs they caught. >> been a tradition ever since. >> reporter: now, it's not so easy getting a live groundhog.it >> it becomes very complicated. >> reporter: there's more than one license? >> oh, yes, there's more than one type of license. >> reporter: she says you need one from the state, one from the federal government, and if you can't find a certified groundhog breeder in your area... >> so then you would need an import license. >> reporter: the new mayor, a guy named paul esser, says it's hardly worth the effort, and not just because of all the red tape, or because he's concerned about his own ears. to hold up groundhogs like we do. >> yeah, i don't like that. no. >> reporter: his proposal? >> he's a wild animal. >> reporter: to chuck the live woodchuck idea entirely. >> maybe we'll have somebody in a groundhog costume. >> reporter: what about a gerbil? would you have an issue with a gerbil? >> he's domesticated, so i would not have an issue. >> february 2 isn't gerbil day. it's groundhog day. >> we've got to have a groundhog. >> because that's the way it's always been and that's the way i like it. >> reporter: around sun prairie...un >> it would have to be a groundhog of some sort, wouldn't it? >> reporter: ....the consensus is clear. what do you think of a groundhog day celebration with no groundhog? >> it would just be winter from there on. >> reporter: ah... and you were worried about climate change. fortunately, ti did find a loaner groundhog for next week's celebration, which gives her a whole nother year to find a permanent replacement. >> you shouldn't be doing that with a groundhog. >> reporter: and it gives the mayor time, too... how would you propose celebrating thanksgiving? ...to find a way to balance on steve hartman, on the road, in sun prairie wisconsin. mayor, any time? >> i have to work on that one a little bit. >> pelley: and that's the cbs evening news for tonight. for all of us at cbs news all around the world, i'm scott and i'll see you sunday on "60 minutes." good night. captioning sponsored by cbs captioned by access.wgbh.org if you're doing everything right but find it harder and harder to get by, you're not alone. while our people work longer hours for lower wages, almost all new income goes to the top 1%. my plan -- make wall street banks and the ultrarich pay their fair share of taxes, provide living wages for working people, ensure equal pay for women. i'm bernie sanders. i approve this message because together, we can make a political revolution and create an economy and democracy that works for all and not just the powerful few. i was, you know, basically waist deep in the car cutting his seat belt we talk with the 7- eleven worker... to find out why he jumped into action... after a car crashed right outside his store. enters a guilty plea...

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