Announcer from nbc news World Headquarters in new york, this is nbc nightly news with lester holt. Good evening. Whether you watched her growing up as part of the generation that discovered her in nighttime reruns, the death of Mary Tyler Moore probably struck you with a sense of nostalgia. In a career that span z tv an stages with she will be best remembered for two sitco sitcoms. Tonight there is reaction from hollywood and beyond. Who can turn the world on with her smile reporter smile lit up two of televisions two most beloved sitcoms of the 60s and 70s. As laura. A stay at home wife and mother. And later up ending tv gender stereotypes as a career woman in the Mary Tyler Moore show. Youve got spunk. Well, yes. I hate spunk reporter born in brooklyn in 1936, moore landed her first job out of high school. Im happy hop point. Reporter appears in appliance kmergss at the hot point elf. She married richard meeker. Then lost her job when she became pregnant at 18 with her only son rich richie. Its no use. Im just fed up. Reporter she returned to tv as a guest star on various series until joining the cast of Richard Diamond private detective. But her big break came in 1961 when she became dick van dykes tv wife. Oh reporter show creator carl rhiner today fondly recalling her audition for the role. She read the first line and i heard a ping in her voice that tickled me. Hi, guys. Reporter in 1970, she reappeared on tv as Mary Richards on the Mary Tyler Moore show produced by her own company mtm. Her character broke the mold for women in tv sitcoms. She was single, over 30, employed, and actually spent the night with a man. Why are you here . Well, i havent seen you in a month or so, and i oh, no. Oh, you didnt think that the only reason that i was here was to reporter and instead of family, she had coworkers and friends. Its a long way reporter from former costar ed azer in, i will never be able to repay her for the blessings she gave me. And from carol burr n net, one of the sweetest people i knew. She struggled in her life. From alcoholism. I began to drink to the point where i thought about it as a solution. Reporter but its the funny moments we cherish and remember most. The spunky, ambitious, and hopelessly optimistic mary. Youre going to make it after all according to her publicist, Mary Tyler Moore died in a hospital in connecticut today in the company of friends and her husband of 33 years. She was 80 years old. We turn now to another major story were following tonight. President trump acting on his campaign vow today to crack down on undocumented immigration. Signed executive orders to begin construction of his longpromised wall along the u. S. Border with mexico and strip federal funding from socalled sanctuary cities. Our White House CorrespondentHallie Jackson has details. Reporter his signature slogan becoming one of his supporters favorite phrases. Build that wall. Build that wall. Build that wall. Reporter now Donald Trumps set to start. Immediate construction of a border wall. Reporter today the president signing executive orders to direct money to Start Construction of his border wall with mexico. The wall, the wall. Everyone loves the wall. Reporter making good not just on that Campaign Promise but on his pledge to crack down on sanctuary cities. Places that dont prosecute immigrants for living there illegally. Now blocking almost all federal funding to those areas. On beefing up immigration enforcement, today hiring 15,000 more agents. And after campaigning repeatedly with people whose loved ones were killed by undocumented immigrants, establishing a new office to advocate for those victims. Out of all of it, his walls most notable and by far the most expensive. A report says fencing alone could cost an estimated 8. 3 million per mile. Democrats estimating the total cost to build and secure the wall at 14 billion. Whos going to pay for the wall . Reporter not according to mexico. The president today acknowledging taxpayers will probably have to foot the bill first while waiting for a reimbursement putting pressure on mexico to pay up by possibly President Trump not backing off that controversial plan or his controversial comments during the campaign about torture. As far as im concerned, we have to fight fire with fire. Reporter President Trump today reiterating where he stands on illegal methods like water boarding in an interview with abc news. I want to do everything within the bounds of what youre allowed to do legally. Do i feel it works . Absolu absolutely. Reporter still promising to listen to his top defense officials who have disavowed torture techniques. And after making false claims about widespread voter fraud, the president s promising a major investigation. Late tonight nbc news has learned from a source familiar with the plans, he could take president ial action as soon as tomorrow on that. But its not clear how hed actually implement it or through which agencies. Lester . Hallie jackson at the white house for us tonight. Thank you. There are reactions around the country this evening to President Trumps actions on immigration. Here in new york a massive protest has erupted against his wall plans and policy makeovers. And to the south, our Gotti Schwartz found along the border the president wants to seal with that wall. Reporter for over a thousandmile stretch, the texas border has no walls, no fence. Every day along the rio grande, Border Agents intercept mostly women and children from Central America crossing in rafts seeking refuge from violence. Today the National BorderPatrol Council applauding President Trumps plan saying now they can do their jobs. In the border town of nogal nogales, arizona, the news spread on both sides of the 20 foot tall iron fence. On the mexican side, anger. Nobody likes trump over here. Reporter and today on the u. S. Side, families coming to speak to those they wish they could hug without metal bars. Its going to be hard to see again. Reporter many asking why mexicans should have to pay for a wall they dont want. I think its ridiculous. It separates the family and then its a waste of money. Its kind of a joke to us. Reporter at the Central Plaza in texas, some latinos joke about the wall. They dont think it will be effective, but they may take the work it brings. We dont feel like traitors for helping trump. Its a wall thats going to bring us prosperity economicwise. Reporter along the 2,000mile u. S. Mexico border reactions to the wall are mixed. In ft. Hancock where a fence stops, Trump Supporters welcome the idea. I think we need to stop people from coming in illegally. Reporter but the lieutenant with the Sheriffs Office has his doubts. Do you think that trump can build a wall . I dont know. I dont see it. When i see it, ill believe it. Its going to be too much money. Reporter and tonight many critics pointing out that signing an executive order that building a 2,000 mile long wall is another. Sharing an extremely long border with some difficult terrain. Gadi schwartz for us tonight. Thank you. Theres big news from wall street where the Dow Jones Industrial average has crossed into record territory crossing the 20,000 mark for the first time. Closing at 20,068, to be exact. A lot of people wondering how long this rally will last. Heres tom costello now and what it means for your wallet. Reporter it happened just as they were ringing the opening bell. After months of toying with 20,000, the Dow Jones Industrial average finally crossed the line. The dow represents 30 of the nations biggest companies. If youd invested 50,000 in the dow when the market hit a bottom back on march 9th, 2009, your money would have tripled by now to 150,000. Just sense election day, the dow is up 9 . Leading the charge, manufacturing and banking stocks. Goldman sachs alone up 30 . On wall street, theyre betting on lower corporate taxes and fewer regulations. How much of this is an endorsement of what the stock market believes will be Donald Trumps policies . Well, i believe it is theres a lot of it right now. I think the investors feel very positive about the future. Reporter but its not just the trump factor. Corporate earnings and improving Global Economy have also helped. So what should average americans do with their retirement accounts . Joanne was meeting with her Investment Adviser outside of boston today. What should i do with my money . Reporter debra is telling clients to invest gradually. If youre in the market fully invested, i strongly suggest you stay in the market even though we could have pullbacks along the way. I still think longterm stocks are a great place to be. Reporter back on wall street, 18 years after first hitting dow 10,000 they were breaking out the dow 20k hats today. The question tonight is whether small investors who may have gotten burned and then got out of the stock market during the Great Recession might be tempted to get back in. Right now 10 of the wealthiest americans own 82 of the nations stocks. Lester . Tom, thank you. Lets turn overseas now for an nbc news exclusive as we assess the world reaction to the new american president. Last night Richard Engel had the word from beijing. Tonight we have access inside north korea with the Nuclear Program that could test President Trump early on. Bill neely has more. Reporter from kim jonguns defiant and unpredictable regime, a direct challenge tonight to President Trump. Cancel your military exercises on our doorstep. They are the root cause of tension on the korean peninsula, he says. The joint u. S. south korean exercises are due to begin in weeks. In a rare interview with this secretive regime, the man who deals with u. S. Affairs told me america cant stop north korea. We will match American Nuclear weapons, he says, with our own. North korea, he warned, is ready to test launch its first longrange missile. Is the launch imminent . Itll be carried out at any time, he says. Before taking office, President Trump tweeted, it wont happen. If it does, it would be another step towards north koreas goal of building a Nuclear Weapon able to hit the u. S. West coast. A former north korean diplomat who defected to the south says kim jongun must go and the u. S. Shouldnt make any missile deal or cancel exercises. That is really a trap, you know, which kim jongun, you know, wants. Reporter north korea carried out two dozen missile tests and two Nuclear Tests last year. There is no sign that that intensity of testing will end this year. And that is a test for President Trump. North korea has challenged a new president before test firing a missile soon after president obama took office. Here in north korea, the regime says it will judge President Trump by what he does. Hes sending general james mattis to south korea on his first overseas trip as the new u. S. Defense secretary. There is no sign that the new president will back down against an old enemy here. Lester . Bill neely from north korea tonight. Still ahead, stunning allegations. A nations largest Student Loan Service accused of taking advantage of customers and illegally driving up costs. The lawsuit that could impact one in every four student loan borrowers in this country. Well tell you what you need to know. Also, high anxiety. 15 stories let life in with new herbal essences bursting with argan oil of morocco and notes of jasmine sure to put more life in your hair and your head. New herbal essences let life in now on the next page youll see a breakdowhat . Costs. Its just. We were going to ask about it but we werent sure when. So thanks. Being upfront is how edward jones makes sense of investing. Its just a cough. Our cough, sfx woman coughing youd see how often you cough all day. And so would everyone else. Robitussin 12 hour delivers fast, powerful cough relief that lasts up to 12 hours. Robitussin 12 hour cough relief, because its never just a cough. Back now with startling news concerning the largest student loan collector in the nation. Navient which serves one of four student loan borrowers in this country has been slapped with lawsuits claiming it cheated people out of billions. Jole ling kent has the details. Reporter he borrowed 41,000 from navient then known as sally mae. He could no longer afford to pay when his Interest Rate jumped to 21 . I did everything i could to make good on my end of the bargain. Reporter navient recommended he stopped paying temporarily. He was not told interest would still pile up. What was originally a 41,000 loan has ballooned to 127,000. I used to beat myself up. Why didnt you ask more questions . I just didnt know. Reporter navient declined to comment on his case. But several state attorneys general filed suit last week. Navients priority was their profits over student borrowers best interests. Reporter the lawsuits allege they failed at every stage of repayment. What we saw consistently was that people were not getting counseling when they were struggling to make their loan payments. Reporter navient denies all the allegations calling them unsubstantiated, unjustified, and politely motivated. The company says their borrowers are 31 less likely to default than those with other companies. They also said its called for improvements to the system but says the government has failed to take steps to simplify it. Its affected my ability to, you know, buy a home, to get a car loan. All the normal daytoday things that adults have to do. Reporter if youve got problems with a navient loan, ask about a payment plan on your income. Put all complaints in writing and contact your attorney general. As for matt portwood, he hopes he can reach a settlement and get on with his life. Jo ling kent, nanz. Were back in a if you have moderate to Severe Plaque Psoriasis isnt it time to let the real you shine through . Introducing otezla, apremilast. Otezla is not an injection, or a cream. Its a pill that treats plaque psoriasis differently. Some people who took otezla saw 75 clearer skin after 4 months. And otezlas prescribing information has no requirement for routine lab monitoring. Dont take otezla if you are allergic to any of its ingredients. Otezla may increase the risk of depression. 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Its unclear why the scaffolder may have failed. A night in montgomery county, pennsylvania. A giant sinkhole opening up right in front of their yard collapsing part of the road leaving a pickup truck dangling on the edge. Local Officials Say its still unclear what caused the ground to give way in the middle of the night. They poured cement in the hole to try and stabilize homes nearby. And a new study that might surprise some but probably not anyone whos ever loved a dog. Researchers of the university of cambridge say kids like their pets more than their siblings. They get more satisfaction from their relationships with their pets and no surprise here, they get along better. Of course whens the last time your sibling ate your slippers . Something to think about. When we come back, remembering a trail blazer who inspiring boost its about moving forward not back. Its looking up not down. Its feeling up thinking up living up. Its being in motion. In body in spirit in the now. Boost. 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