Big hit, and millions of families who cant get enough. Nightly news begins right now. Announcer from nbc news World Headquarters in new york, this is nbc nightly news with lester holt. Good evening. A success against terrorism. The words of belgiums Prime Minister aftfter announcing a few hours ago that t the only surviving attacker in novembers terror attacks in paris has been taken alive. 130 people died in that awful night last november when isis terrorists massacred concertgoers and patrons at a restaurant. All but one of the attackers weree killed wiwithin days as the last slipped across the border into belgium, and it was there in a Dramatic Police raid today that elusive suspect was shot and wounded and taken into custody. Nbcs keir simmons has late details from brussels. Reporter gunfire forces aim at a suspect. They drag him to a police car. Hes falled and then bundled into the back and a crowded street close by people flee as more gunfire erupts, and live on Belgian Television an explosion. The Dramatic Police raids capturing europes most wanted terrorist, 26yearold Salam Abdeslam on the run since the paris massacre which killed 1300 people. Tonight president obama called to congratulate belgiums Prime Minister who appeared with the french president announcing the news. Abdeslam, one of ten isis members identified by investigators as taking part in the paris attacks, all now either died c carrying them out, were killed or captured. He had been on the run from police for four months. The morning after the attacks hes seen on Surveillance Video in northern france at a gas station. Making it through a border checkpoint and into belgium. The manhunt accelerating when his suspected suicide vest was found abandoned in paris later that month. Twice since, once in december and again tuesday, prosecutors said his fingerprints had been found in raids in brussels, and the key breakthrough was that tuesday raid in the brussels neighborhood of molembique. A suspect is shot dead after abdeslam was thought to have slipped away but tonight Police Closed in hon him. The top terror suspect who was able to avoid capture for so long, even in a major european capital, now providing investigators with an intelligence gold mine. This case is all about intelligence, the ability to look and see if there are other pending attacks or those that are in place right now. Additionally they will be looking at other coconspirators coconspirators, other abdeslam was found in this neighborhood just streets from his childhood home. Meanwhile tonight the french president saying t there were many more people involveved in the paris attacks than was first thought. Lester . Keir simmons tonight in belgium, thanks. Our chief Foreign CorrespondentRichard Engel has covered this manhunt from p paris to brils and beyond. Richard, what do you make of this takedown . Reporter left, i think the most revealing aspect of all of this is location. Why did he go back to his home neighborhood, and i think it reveals how isolated he was. You see, from isis perspective abdeslam was a failure. The other attackers all died in the attack, and if youre an isis Suicide Commando the group does not expect you to survive. He couldnt go to syria nowow having failed in this attack. He couldnt slip away back into isisheld territory, so he went back home where he still had a networork of friends a and supporters who were able to shelter him. Perhaps the belgian authorities should have been looking in lester . And the question, of course, what can he tell authoritities . Richard, thank you. Lets turn now to a latebreak Political Development here at home. Just two weeks after his scathing public dressing down of donald trump, mitt romney has announced hell vote for ted cruz in next weeks utah primary. The 2012 republican nominee is not calling ittan endorsement, but hess being quite open aboutt his motivation. Hallie jackson is covering the cruz campaign. Tell us more about this, h ha llie. Reporter sure, lester. This move by mitt romney is like a bat signal to the rest of the establishment to get on board behind ted cruz who i is campaigning on the border in arizona today, but utah were romneys influence could make the most difference. They have modelled theirr path to the nomination on not jusust winning utah but winning big to scoop up every delegate and cut into Donald Trumps lead but dont call this an endorse president. Mitt romneyy isnt. Instead hee says coconservatives should force an open conventionon and that tells us two things, first, that t the establishment hasnt fully settled necessarily on who itits for, although it knows who its a against and, second, howow serious partyty leaders are that a contested coconvention is the most plausible way to stop trump. Listen, in my book when someone says im voting for you and i encourage everyone else to vote for you, thats pretty darn good, and ill take that and take that happily. Reporter all of this a blow to john romney calling a vote for him a vote for trumpism. All right. Tonight, thanks. Were going to get reaction to this from the trump campaign. Nbcs katy tur has that for us. Katy, what are you hearing. Reporter hey there, lester, donald typical donald trump fashion tweeting that mitt romney is a failed president ial candidate, a mixedup man who choked in 2012. Now, although romneys support could help ted cruz in iowa, it is important to note that conservative state, much like iowa, much like oklahoma. Both of which ted cruz won and donald trump lost. Still, trump is campaigning there, even amid news and some serious security concerns for him and his family. Reporter security around donald trump tightening as new threats target the gop frontrunner and his family. The joint terrific task force now investigating a suspicious envelope filled with white powder delivered to trumps son eric in his new york city home. Preliminary tests show the powder was not hazardous, but police sourced tell nbc newss the letttter, postmarked massss marks demanded donald trump drop outut and threatened the contents of the next envelope wont be fake. This is a call to arms. Reporter and now the Hacker Group Anonymous declaring total war on trump. We need you to dismantle this campaign and sabotage his brand. Reporter the Group Promising to expose the billionaire, now posting personal his Social Security number. So much of that information was already available online. Still, the secret service is investigating alongside the fbi and wrapping up their presence around the candidate himself after a man tried to jump a barricade to rush the stage at a rally in dayton, ohio. You have counterassault assets and countersniper assets, this says to me that this is a grave threat. Reporter trump is back on the trail in utah and so are the protesters preparing to disrupt the candidate in salt lake tonight and arizona tomorrow. Katy tur, nbc news, new york. Just in time for the start of spring, a big snow storm is barreling across the country from the rockies to the midatlantic and all the way up to new england, but how much impact its said to have depends on which super powerful computer is right. For years the u. S. Has lagged behind in the technology to keep up forecasters, but as al roker reports, this season thats about to change. Heres the storm time line. Were going to see the snow mixing with some rain sunday m morning reporter east coast bracing for a potential noreaster this weekend. Were definitely getting snow on s sunday into monday. Reporter forecast from d. C. To boston, snow, on the first day of spring, but just how much . Thats the Million Dollar quesestion, why . The models. The european model, new york city, around 8 to 10 inches of snow. Up into new england 12 inches or more. The american mold almost nothing. So which is right . The actual positioning. Front reporter his torically the european model. It predicted the track of sandy and joaquin thanks to a superior super computer. Just outside of london at the European Center for mediumrange weather forecasts they take a ton of data, crunch it through a susupercomputer, one of the fastest in the world, producing what many say is the Gold Standard of weather what we are doing is were adjusting the whole trajectctory of the model in time over 12 hours, every 12 hours, using observation so its a continuum, more continuous fit of the model to the observations. Redevelops. Reporter but back in the National Weather service, they are doing their part to close the gap. Urgent efforts to ensure more accurate forecasting. They now have two new supepercomputers of their own. You need the worlds Fastest Computers because we are talking are very complex formulation of the atmosphere and were lag significantly in the computing power. Reporter now, lester, they are catching up, and this storm may be one where we see parity has been gained. You look at whats going on. The american model and the european model, the european mod sell coming closer to what the american model originally showed. On saturday rain and snow in d. C. And philadelphia, and heavier snow as you get into the appalachians. As we get into sunday evening, snow increasing from new york city to new england, heaviest by monday its just about over. A lot of strong wind and much cold ker and the snow endss by afternoon and look at the difference in terms of accumulation. European 2 purchasases from new york city and boston the heaviest and the american model much less and it seems like the european model with each run is coming closer to what says. And we dont get a vote. Exactly. Happy spring, by you bet. We turn now to a troubling story developing out of wiping where more than a does u. S. Airmen assign ed are suspended amid reports that they are the subjects of drug scandals. Jim miklaszewski has the report. Repeporter they guard one of americas most powerful Nuclear Arsenals and now they are under investigation for illicit drug activity. The 14 airmen are part of the support for the all 14 were suspended from duty earlier this week after reports they were involved in illicit drug activities. Air force officials refused to reveal the nature of the offense or drugs involved, but said the activity occurred while the 14 junior airmen were off base and off duty, and it had no impact on security for the nuclear arsenal. This is something that the air force has been trying and failing to address for years, and they do need to get to the bottom of this to correct these problems which do compromise the security. Its the third scandal in nine years involving the u. S. Nuclear commission. Nine Nuclear Weapons officers were fired in a cheheat willing scandal at mal strom air force base in montana monand four commanders were ousted after the air force lost track of six neapons at Minot Air Base inn north dakota. This time they launched a quick investigation in order black mark onn their nuclear mission. N. Lester . Thank you. Bail has been rerevoked for a former prep School Student when he was convicted of misdemeanor Sexual Assault against a fellow student. A judge said owen labrie repeatedly violated t the courtimposed curfefew and sent him straight to jail to begin serving sentence. Im going to revoke bail. Reporter owen l la brie, no longer a free man led out of a New Hampshire court. Guilty. La brie was out on bail under strict conditions while his case was appealed having been convicted of a misdemeanor Sexual Assault of and underage classmate when the two were at an elite prep school. After a report tweeted about him visiting aa girlfriend last month at harvard the prosecutor investigated whether he violated his 5 00 p. M. To 8 00 a. M. Curfew. The defense admitted la brie had missedd curfew but argued he lawyers or taking classes. He chose wrongly, your honor, admittedly, to try to fly under the radar. Reporter la bries case gained National Attention when the trial revealed an alleged ritual at the st. Paul school neon as the senior salute when seniors ask out freshmen, sometimes for sex. [ laughter ] brie now faces up to a year up in jail and his attorneys deciding whether to appeal the jail revocation. Never have i seen anybody having their bail revoked because of going to college or classes. None compliance is subject to penalties. Reporter so tonight the 20yearold is behind bars. Kristen dahlgren, nbc news, concord, New Hampshire. Still ahead here tonight, risky combination, how you may knowingly sabotage your medical medications with something millions and you never know woman its been a journey to get get where i am. And i didnt get here alone. There were people who listened along the way. People who gave me options. Kept me on track. And through it all, my retirement never got left behind. So today, im prepared for anything we may want tomorrow to be. Every someday needs a plan. Seresto makes it easy to help protect your dog or cat from fleas and ticks. With the performance you expect from a monthly topical in a nongreasy collar. Seresto kills and repels fleas s and ticks for 8 continuous months. Seresto. From bayer. Olay regenerist renews from within. Plumping surface cells for a dramatic transformation without the need for fillers. Your concert tee might show your age. Your skin never will. Olay regenerist, olay. Ageless. And try the microsculpting cream you love were back now with a warning from doctors for the tens of millions of americans who take Dietary Supplements. Perhaps youre one of the twothirds of adults who takes at least one supplement every day. Researchers are finding many of them can interfere with prescription meds, especially cancer drugs. Yet as nbcs tom costello reports, patients often forget to tell their doctors reporter for 42yearold shell he newhouse a devastating diagnosis, facing cancer in both breasts. She opted for a double mastectomy and then on the advice of holisticc practitioners loaded up on any dietary supplement that promised to build her immune system and fight cancer. I was taking 60 pills a day. Reporter 60, 60 supplement pills a day . Yes. Reporter but when she went back to Dana Farber Cancer institute to begin chemotherapy her white count was too low to start, likely due to all the susupplements, say her doctors. She didnt realize it was important for me to know what she was take when she was on chemotherapy as it wasnt a prescription medication. Reporter it took weeks without supplements before her white count was high enough to begin the chemo. Now new Research Indicates its becoming more common. The biggest concern many supplements can interfere with cancer drug, either lessening their effffectiveness or make being them more toxic and many prescribing doctors never know the patients are taking the supplements. Echinacea and kava can impact Breast Cancer drugs and other supplements can interfere with a wide range of prescriptions from blood thinners to cholesterol and anxiety meds, even radiation therapy. People think, you know, it cant hurt, but biggest problem is that have there are actist ingredients in Dietary Supplements that act same way that medications do in the body. Reporter many want the fda to regulate is uppants. That just because something is natural doesnt mean that its safe. Repororter supplement industry stresses they can be health and as long as patients tell their taking. Shelly now takes six. I believe in taking the Vitamin Supplements because i wanted to do anything that i could to beat cancer. News, today shelly learned shes cancerfree. Tom costello, nbc news, boston. Were back in a moment with the proroud new parents in a suddenly very busy nest at th i use what s already inside me to reach my goals. So i liked when my doctor told me susugar and a1c goals by activating what s within me. With onceweekly trulicity. Trulicity is notot insulin. It helps activate e my body to do what it s supposed to do release itits own insulin. Trulicity responds when my blood sugar rises. I take it once a week, and it works 24 7. It comes in an easytouse pen and i may even lose a little weight. Trulicity is a onceweekly injectable prescription medicine to improve blood sugar in adults with type 2 diabetes. It should be used along with diet and exercise. 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Lets review heat, plus relief, plus healing, equals thermacare. The proof that it heals is you. Cananada tonight where actor Dillon Obrien has been seriously injured on the set of a new maze runner movie in vancouver. The young star was hospitalized after some sort of mishap during filming of the film studio 20th century fox did not release details. Production has been shut d down while he recovers. History in the military tonight. Defense secretary Ash Carter Says president barack obama willl nominate the first woman to head a major combatant command. If confirmed by the senate air force general Lori Robinson would head the u. S. Northern command which was created after 9 11 to coordinate and improve our homeland defenses. The newest resident in our Nations Capital has finally come out of its shell, a baby bald eagle hatched on a live web cam this morning at the National Arboretum and viewers who stayed tuned also got a peek at i its very first viewing. A second eaglet is expected to hatch this weekend. When we come back, kids on the new what if one piece of kale could protect you from diabetes . 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. If you are 50 or older, one dose of the prevnar 13 v vaccine can help protect you from pneumococcal pneumonia, an illness that can cause coughing, chest pain, difficulty breathing, and may even put you in the hospital. Even if you have already been vaccinated with another pneumonia vaccine, prevnar 13 may help provide additional protection. Prevnar 13 is used in adults 50 and older to help prevent infections from 13 strains of the bacteria that cause pneumococcal pneumonia. You should not receive prevnar 13 if you have had a severe allergic reaction to the vaccine or its ingredients. If you have a weakened immune system, you may have a lower response to the vaccine. 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So you can breathe and sleep. Shut your mouth and say goodnight mouthbreathers. Breathe right finally tonight, the little kids with big talent on tvs newest hit show. Millions are tuning in sunday nights right here on nbc to see what these kids can do, but its what they are saying thatt really has families watching at home in stitches. Our Kevin Tibbles has more. Welcome to Little Big Shots, everybody. Reporter the only thing little about Little Big Shots. Thats enough. Reporter are the pintsized prodigies. Reporter nearly 15 Million People tuned in to watch host steve harvey introduce some very talented kids. And somehow navigate some quirky conversation. Where are your balls . Reporter his facial expressions take over when words just wont do. You cant produce a 6yearold. He doesnt remember what you told him to say. He doesnt care, and neither do i, so thats the magic. Reporter Little Big Shots is the sleeper success of the season, tapping into that tried and true tradition of something enjoy together. Oh. Reporter the shows coexecutive producer is ellen degeneres. Its a talent show but not a competition. Everyones a winner. Art linkletter and the kids. Reporter in the 50s and 60s folks were glulued to the tube and art linkletters house party where kidsds often said the darnedest things. Whats the hardest thing about schooll for you . Buttoning my pants. Reporter and perhaps theres another reason were watching. Election year where badly. Here can you actually see the future of the country through the kids as opposed to the politicians. Reporter this teeny tiny talent time is clearly a hit with kids of all ages. Kevin tibbles, nbc and thats going to do it for us on a fridayay night. A Quick Program note. Originate from cuba prpresident obama becomes the first president in more than 80 years to visit that country. Well see you from there. Im lesester holt. For all of us at nbc news, thank you for watching and good night. Questions around the fiery plane crash tonight. Coming up on 8 at 7 00. Two people died at the Davis Airport on davis island. However what exactly happened here is still a mystery tonight. Plus, a final farewell today for a bay area hero