sent, but today's revelation raises questions about clinton's decision to use her private 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 >> i did not e-mail any classified material to anyone on my e-mail. there is no classified material. >> 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 whether 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 odds should have known never to discuss it over an place. >> pelley: nancy cordes on the road in iowa. nancy, thank you. now to the republicans. 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 of that 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. >> 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. found himself under heavy fire. the central topic-- immigration and the definition of amnesty. senator rand paul. >> he is the king of saying, "oh, you're for amnesty. everybody's for amnesty except for ted cruz." but it's a falseness ands that's an authenticity problem. >> reporter: marco rubio, hoping to finish third here, had some of the fiercest clalaes with cruz,. >> this is the lie ted's campaign is build builton. the truth is, ted, you have been willing to say or do anything to get votes. >> he chose to go the direction of the major doerns to support amnesty because he thought it was politically advantageous. >> 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 brand stead told us today g.o.p. turnout monday night could be 30,000 higher scott, the governor said trump, who has drawn impressive crowds in democratic strongholds here, would likely be the biggest beneficiary. >> pelley: major garrett, thanks, major. john dickerson, sat down with donald trump today for a "face the nation" interview. >> some veterans groups have said you used the veterans as part of a political stunt, that you were, you know-- >> i haven't even sign that. i haven't seep that. we were so-- they were so happy last night. we had tremendous numbers of vets. why would they be against raising money in. >> reporter: well, i guess the idea is you were offended by forks wanted to get-- you know, not be in the debate, and then you concocted the veterans thing kind of as an afterthought. >> i can tell you the vet groups we dealt with are so happy and they will be splitting up $6 million. >> reporter: 22 organizations. wounded warriors is not on the list. why not? >> i saw some stories, i think on cbs, actually, and i think i want to give it a little pause. what things are costing and how they allocate their money and i like to see nice, low numbers in terms of expense. 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 count counties and is following the state-of-the-art science 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 will pay off. >> pelley: by retail state, we mean going door to door. what about the democrats? >> on the democratic side, bernie sanders is the one having emotional reaction from voters of the kind donald trump is seeing. and iowa democrats love an insurgent candidate, but hillary clinton has been organizing she wasn't going to be surprised this time the way she was in 2008 by barack obama. but despite all that preparation, there still might 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 evaluator of charities, but putt 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 employees drinking flint water. the e-mails were sent days oofort city told residents the water contained high levels of a by-product from treatment 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, "while the city of flint states corrective actions are not necessary, it would provide a water cooler on each occupied floor so you can choose which water to drink." in a radio interview this afternoon, governor rick snyder addressed the issue of state workers getting coolers. >> they were just doing it as part of their normal operating procedures to make sure they were taking care of responding to those notices? >> but does it look bad, though, that state workers got waters before-- >> no, the appearance didn't help matters at all, but, again, it was not tied to the lead issue. >> reporter: we asked flint residents what they thought about the e-mails. >> last when? >> reporter: january. >> january. a year ago? that's sad. >> reporter: what will it take for to you regain trust in the state? >> wow, i have no idea. 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. andand manuel 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 home and trying not to track dirt inside. but in 2014, tests showed three-year-old phoebe had nearly her blood recommended by the centers for disease control and prevention. depauw had her water and soil tested. >> when you can't count on basic infrastructure like water being safe, what-- that's just scary. >> reporter: water tests in depauw's home confirmed the presence of lead, 8.5 parts per billion, that's still below the 15.that is considered 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 neurocognitive 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. >> reporter: cedric grant is water board. >> we are doing everything we can with one of the most extensive water quality labs in 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 it has also been revealed that officer jason van dyke's dash-cam was not working that night, 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 dash boards, an analysis of police maintenance logs by the web site dnainfo 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. 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 mcdonald, none of the five cruisers on the scene recorded audio when officer jason van dyke shot mcdonald 16 times. escalante concedes on any given day about 12% of the records need to be fixed, but intentionald destruction will be met with rep rimandses or suspension. dean angelo of the police union blames aging equipment and not the jierntionz some of those things have been in disrepair fair long time and it now come down on the operators of the unit 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. then left, leaving a lot of towns without a grocery store. that's coming up when the cbs 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 diarrhea; severe stomach pain or tenderness; severe nausea or vomiting; extreme fatigue; constipation; swollen ankles; loss of appetite; 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. fast, powerful cough relief. robitussin dm max. because it's never just a cough. >> 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 tap that snow watched as the front doors to her walmart neighborhood market were could have had 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 white wright texas, a year town of 1700 people without a grocery store for 22 miles. >> they didn't even celebrate a year anniversary, and they're shutting it down. 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 no plans to reopen. where are you going to buy your groceries now? >> i don't know. it won't be walmart. >> reporter: scott, the 35 employees who worked here were given two options-- keep your job and relocate to another store, or take a severance. >> 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. just like that. 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. the three broke out a week ago 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's nearly eaten by a monster wave at the maui surf spot known as "jaws." you may remember the jaws of a groundhog caught the earave small-town mayor last year. and it's next. getting involved to make court avenue a safer place, even though it's located nowhere near the entertainment district. we'll tell you how, next at si . >> 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 ground square. the local bakery s sls 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 last year, when then-mayor jon freund >> he says-- that-- uh-- that he, uh-- didn't see a shadow. >> reporter: shortly after chewing his way through the mayor's ear,ed sun prairie groundhog chewed his way through a metal cage and escaped. naturally, the town wanted a replacement woo chuck, 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. she says they started celebrating here in 1949, using ground hogs they caught. >> been a tradition ever since. >> reporter: now, it's not so easy getting a live groundhog. >> it becomes very complicated. >> reporter: there's money 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. 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. he says it's simply not humane 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 wouldn't. >> february 2 isn't gerbil day. it's groundhog day. >> we've got to have a ground hog. >> because that's the way it's always been and that's the way i like it. >> reporter: around sun prairie the consensus is clear. what do you think of a groundhog day celebration with no ground hog? >> it would just be winter from thereon. >> reporter: ah... and you were worried about chiement change. fortunately, ti did find a aloner groundhog for next week's celebration, which gives her a whole other year to find a permanent replacement. 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 his soapbox. steve hartman, nosratollah khosravi-roodsari, in pair, mayor, any time? 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 pelley. and i'll see you sunday on "60 [kcci captioning is brought to you by the iowa clinic] >> the final debate is over. with just three days to go before the iowa caucuses, what support. stacey: see if the efforts are working. steve: and bar owners and restaurants are saying more needs to be done to make court avenue safer. the last debate before the iowa caucuses gave voters the last chance to be seen head-to-head. stacey: now they're trying to build on any momentum they built. chris christie was rallying his campaign staff at his campaign headquarters he acknowledged his low ranking in the poll. one from quinnipiac university showed him with just 3% support from likely caucus goers. but he said low expectations leave room for surprise and he said last night's debate showed a real difference between him and the other ton contenders. >> last night was a lot of fun. i enjoy getting up on the stage and mixing it up with the other folks in this race. i felt good about the answers we answered the questions we were asked.