Laachrao laachraoui. Just in, nbc news has confirmed the names of the two attackers on the left as brothers, khalid and ibrahim el bakraoui. Counterterrorism officials tell nbc news that the men wheeled suitcase bombs, two of which exploded, while the third did not. It was later safely detonated by belgian authorities, overnight raids yielded what investigators believe to be a bombmaking factory. They found chemicals used for explosives, bombaking material, nails and bolts, an isis flag was also found. Isis has claimed responsibility for the attacks, 31 people were killed and hundreds more injured. Nbcs bill neeley reports. Terror in the airport terminal. Its 8 00 this morning, moments after an explosion. A stroller lie ace bandened. A victim is on the ground, a survivor says stay down. Through the smoke, a woman cowers, clutching a child. Someone cries help me. Then survivors begin running. Past a body and the injured. Some in shock. Another calling with news shes alive. Minutes after the first bomb, another explosion near an airport starbucks and hundreds are running for their lives. Others fled to the tarmac and safety. There was no safety inside. With fire from the first explosion, Ceiling Tiles falling. Dozens injured. And at least 11 dead. And it wasnt over. Another bomber was about to strike in the very heart of brussels. Near the European Unions headquarters. 9 10, deep underground, a massacre in the brussels metro. A bomb has just exploded. Dozens flee through the darkness. Its terrifying. They left behind a mangled train car. At least 20 dead. Horror on the morning commute. Many of those on the train and at the station here have been reading about the first attack at the airport on their phones, when the bomb here went off. An american on the next train felt the impact. We felt a little gust of wind, my ears popped. And we heard some thudding. Belgiums Prime Minister called this a dark day. And all day president obama has been kept briefed. More than 200 were injured, many by shrapnel, this nail is in a mans chest. At least four americans were wounded. Three are mormon missionaries in the hospital with shrapnel wounds and burns, one had been a block away from the Boston Marathon bombing. That was nbcs bill neely reporting. Steve clemens is washington editor at large for the atlantic. He writes frequently about politics and foreign affair, is joining me now on the phone. Steve, good morning to you. What can you tell us about this attack . Well what i can tell you is i mean i came up from the, the basement train station up into brussels airport. And the departure hall yesterday just off the bombs. And was there to just sort of see on peoples faces the fear, the terror they felt after what happened. I saw smoke, i saw broken glass. I can tell you that apparently we lost steve clemens. Cities around the u. S. Have stepped up security in response to the terror attacks in brussels, nbc news justice correspondent Pete Williams has more. In new yorks times square, extra police swarm in with 50 officers deployed to the subway station there. On bridges and tunnels, more random checks of cars and trucks. On commuter train systems from los angeles to washington, a scramble to turn out a visible show of force. Nationwide, fbi agents are stepping up surveillance of terror suspects on the lookout for possible copycat attacks here at home. U. S. Officials say theres no known threat of a brusselsstyle attack here. And the experts say the security picture here is far different. Police in europe are overwhelmed, trying to track the nearly 7,000 people who have been to train with isis compared to the roughly 200 who have gone or tried to go from the u. S. Some of the countries in europe have unique challenge. I think its probably because of their close proximity to some of the countries of concern. And the fbi has proven adept at stopping potential attacks here. But u. S. Officials say they face one big challenge their european counterparts do that make terrorists harder to track the use of encrypted apps, disposable phones and other ways to communicate that cannot be monitored. And a former Homeland Security secretary says the u. S. Has a head start over much of europe, working hard since 9 11 to prevent terror attacks. The bombmakers are crafty and they keep adapting. This is not a static situation, it will keep moving. It requires United States security to keep improving. Nbc news bs Pete Williams reporting. Much like those reactions, last nights contests were also varied. In the democratic arizona primary, Hillary Clinton is the winner. Handily defeating Bernie Sanders. It was a different story in the democratic caucuses where sanders won the utah caucus, as well as the idaho caucus. Interesting to note, officials report massive and overwhelming turnout in the state. Donald trump is victorious in the winner take all Arizona Republican primary. And the 58 delegates up for grabs. While in utah, ted cruz is the winner. He actually takes all 40 delegates up for grabs there. After exceeding 50 of the vote. Meanwhile cruzs Campaign Says hes getting an endorsement from former gop candidate jeb bush. In a statement via the Cruz Campaign. Bush says in part we must move to overcome the divisiveness and vulgarity that donald trump has brought into the political arena. Political analyst ellis hanigan joins us from new orleans. Before we get to the numbers, did the attacks in belgium have any effect on the voting last night . I think its more confirming than disrupting. What i mean by that is say youre Hillary Clinton supporter. You probably convinced by the attacks that oh, we need just the kind of firm hand that hillary has. If you love trump you say yeah, we need some of that trump muscularity. And trump is edging closer to the 1237 delegates needed to secure the nomination. Especially now that theres the big win in arizona. That was a big win for him. Do you think he will now reach that magic number . You know, hes inching closer and closer. I dont want to call it a lock yet. But every time he advances, he gets that much closer and it gets that much harder for those stop trump people. Well speaking of stopping trump, cruz, how big was the utah win for the Cruz Campaign . Well, pretty big. I mean particularly since he got over the 50 threshold, which means he gets all the delegates there. So yeah he has a good story to tell last night. Frankly all these guys do, except for kasich, who doesnt have too much to brag about. Hillary clinton also dominating win in arizona. But Bernie Sanders won utah and idaho. Is he gaining momentum . You know people stood in line for hours in idaho to place their vote. Thats true. Theres clearly still a lot of passion there. But again, you know youve got to get back to those numbers. And while bernie may have a little mull, hillarys got the numbers. That may matter more. And Bernie Sanders says hell go all the way to the convention and try to win over superdelegates. Is that a valid strategy for the Bernie Sanders campaign . Good luck on that, bernie. Its probably what he has listen, he wants to keep pressing this message, hes clearly got some real genuine passionate support. Hes going to go until the summer. The chances of victory, i dont think theyre looking so great. Ellis henican, thank you so much. Lets get a check of your wednesday weather now from nbc meteorologist bill karins. Good morning to you, bill. Good morning to you, dara. Were dealing with a huge storm in the middle of the country. It affected the west the last two days, now all the problems are from colorado to the great lakes. We have a blizzard, an allout blizzard, a lot of people dont realize some of the snowiest months of the year in colorado are march and april. This will live up to it in denver. 50mileperhour winds and up to nine inches of snow. Blizzard warnings for northeast colorado and winter storm warnings cover nine states into the plains and up to the northern portions of michigan. A lot of the big cities are on the edge of this, like minneapolis and madison and milwaukee, but green bay is in the middle of this, a foot of snow possible at the end of march, oshkosh, same to you, rochester, minnesota could get a foot. Traverse city, grand rapids and lining here in michigan. This is springtime, when you get the storms, the southern portions have severe weather. I dont expect a tornado outbreak. But isolated tornados are possible from areas of arkansas to oklahoma and northeast texas. St. Louis will have a line of strong storms with really strong winds later today. The forecast temperatures go to l. A. , no problems in the west, just a little cool. As we mentioned temperatures are seasonable is safe in the middl of the country. Bill, thank you so much. Just ahead, how countries are paying tribute to the victims of the belgian bombings. And crowds have been growing around the makeshift memorials. Youre watching early today. With ingredients like roasted hazelnuts and cocoa, the delicious taste of nutella takes pancakes to a whole new level. Make any day a pancake day with nutella. Spread the happy if you have allergy congestion muddling through your morning is nothing new. Introducing rhinocort® allergy spray from the makers of zyrtec®. Powerful relief from nasal allergy symptoms, all day and all night. Try new rhinocort® allergy spray. All day and all night. Pepper discovers jimmy dean delights, made with real egg whites, lean cut meats, and whole grains. An excellent source of protein, it fuels her up with energy to help power through her morning. With jimmy dean delights, good mornings lead to great days. What body aches . Gels, youll ask what knee pain . What sore elbow . What joint pain . Advil liquigels are so fast, they make pain a distant memory nothing works faster stronger or longer than advil liquigels the worlds 1 choice what pain . Advil. Eye of the tiger ime. Tv anncr good afternoon everyone. Morning rituals are special. When you share what you love. With who you love. Kelloggs frosted flakes. Theyre grrreat ifor all the wrong reasons. Gical you may be muddling through allergies. Try zyrtec® for powerful allergy relief. And zyrtec® is different than claritin®. Because it starts working faster on the first day you take it. Try zyrtec®. Muddle no more®. Around the world from pariss eiffel tower to the Brandenburg Gate in berlin, monuments lit up in the belgian tricolor. New york city, the Empire State Building went dark to honor the victims and flags were lowered at londons 10 downing street and 1600 pennsylvania avenue. As the world stood in solidarity with the belgian people, now its time for the latest on the investigation in brussels and for that lets go to alistair jameson, live in london. What can you tell us now . Good morning, dara. Thats right, just a few moments ago as you mentioned, the city of brussels fell silent in tribute to those who have died. Earlier on this morning, authorities gave an update on the investigation into yesterdays attack. Saying that three suspects involved in the bombing were actually known to authorities, and had been sought by them for their involvement in or had links to the paris attackers. Those responsible for the attacks back in november. They included Najim Laachraoui, a 24yearold who will gone to syria in 2013, had returned in september to europe, crossing many borders, on false passport before renting a house in belgium. Where he had been in contact with those paris bombers. The other two were brothers, khalid el bakraoui, 27 and his 30yearold sibling, ibrahim. They were sought over their links to the paris attacks. And to the escaped and antiterror raid in brussels, only a few days ago. Now there were conflicting reports a few minutes oolg that Najim Laachraoui had been arrested. Those have not been confirmed. All of this raises questions for authorities in belgium about why they were able to identify and to shut down this major terror cell in the almost five months now since those attacks in paris in november. And also, whether the arrest on friday of abdeslam, the main suspect, had simply, encouraged others on the run to carry out attacks, knowing that their time was up soon. Tough questions this morning for european leaders about the open borders in europe and how to clamp down on the movement of terrorists around europe. The french pm saying we have closed our eyes to the terror threat. This is not like any war here known in the 20th century. Dara . Alistair jameson in london for us, so many moving parts to this. Thank you so much for those details. Just ahead, new details on the americans injured in brussels, plus, sad news about torontos infamous former mayor, rob ford. Youre watching early today. 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 now with lightweight spf 30. That are lighter in calories and added sugar when you use splenda no calorie sweetener. Think sugar, use splenda this morning on today, matt lauer is live from brussels with an emotional eye witness account of yesterdays terror attacks and what investigators learned overnight. Well there were no reports of any americans killed in the brussels attacks, but a number of americans were injured. Including a group of mormon missionaries. Nbcs Miguel Almaguer has more. At least six americans were injured in the attack. But thousands are in belgium. Here at home, their families waited desperately for word from their loved ones. He was there in the middle of the blast. Chad wells son, mason, suffered seconddegree burns and was hit by shrapnel. The 19yearold was at the airport along with mormon missionaries richard norby, joseph empey and Fannie Rachel clain, all are recovering. Ironically, mason was in paris when 130 people were killed. And also survived the Boston Marathon terror attack. I think that experience of the chaos and civil unrest prepared mason toor whatever experience. For parents, news came painstakingly slow. Lauren cleary, monica hall and kate duffy, students from Quinnipiac University were also at the airport during the attack. Janet cleary got the call at 3 00 a. M. That lauren and her friends were all safe. She called and crying, hysterically that you know, that she, there was a bombing, that she was at the airport. And a bomb went off. Nbcs Miguel Almaguer reporting. Now to other news were following today. Rob ford, the controversial former toronto mayor passed away tuesday. He became mired in scandal three years ago, into his term, three years into his term when a video alleged to show him smoking crack cocaine much after denying the account. Ford later admitted using the drug in a drunken stupor, he was hospitalized in february for a rare form of abdominal cancer. Ford was 46 years old. On the heels of his historic trip to cuba, president obama touched down in argentina this morning. Hell meet with the countrys new president , macri to discuss trade and argentinas reform agenda. Nasa launched an unmanned rocket carrying 8,000 tons of food and equipment to the International Space station. The two are set to link up on saturday. And former Alaska Governor sarah palins new career, daytime tv judge. A publicist said the onetime Vice President ial candidate will do her best judge judy in mediating and deciding cases. The yet to be named show wont premiere until the fall of 2017. Just ahead, living through a terror strike, eye witness accounts of yesterdays terrifying moments. Mascara. Now, revlon introduces a new llection of mascaras that makes getting the lash look you want easy. So whether you choose ultra volume, super length, volume and length magnified, dramatic definition, or the ultimate allinone. The choice is yours. Choose love a revolution in mascara. Revlon. Love is on. Ifor all the wrong reasons. Gical you may be muddling through allergies. Try zyrtec® for powerful allergy relief. And zyrtec® is different than claritin®. Because it starts working faster on the first day you take it. Try zyrtec®. Muddle no more®. And clean and real and inside jokes and school night. Good, clean food pairs well with anything. Try the clean pairings menu. At panera. Food as it should be. Easo get to kohls. And take an extra 20 off with your Friends Family savings pass shop friday night owls and saturday early birds. And dress em up with 40 to 60 off dresses kids dressy apparel. And new shoes for the whole family. For him save 45 to 55 on a crisp new dress shirt and tie. And pick up a new Spring Handbag at 50 off. Everyone gets kohls cash too now thats the good stuff. Kohls. Pepper discovers jimmy dean delights, made with real egg whites, lean cut meats, and whole grains. An excellent source of protein, it fuels her up with energy to help power through her morning. With jimmy dean delights, good mornings lead to great days. Eye of the tiger ime. Tv anncr good afternoon everyone. Morning rituals are special. When you share what you love. With who you love. Kelloggs frosted flakes. Theyre grrreat if you have allergy congestion muddling through your morning is nothing new. Introducing rhinocort® allergy spray from the makers of zyrtec®. Powerful relief from nasal allergy symptoms, all day and all night. Try new rhinocort® allergy spray. We are hearing more from survivors of the brussels bombings. Take a listen. Suddenly there was a blast of air and my ears popped. We heard some loud thuds that seemed to be in the distance and the metro stopped. My thought at the time was thats one, thats two. Threes coming, maybe even four and given what we know about what happened in paris, i thought theres a good chance im going to start hearing. Rifle fire. Its a tragedy, the bodies, the blood, destruction, that stuff, i wouldnt wish on anybody to see. Im dara brown and this is early today. How do you become americas 1 . Start by taking care of families for 70 years. Earn the trust of 32 nfl teams. Be there for americas toughest and help, when help is needed americas 1 isnt a status earned overnight. Its earned in every wash, and reearned every day. Tide, americas 1 detergent. Another antiwrinkle cream in no hurry to make anything happen. Neutrogena® rapid wrinkle repair works. In one week. With the. Fastest retinol formula. To visibly reduce wrinkles. Neutrogena®. Leading the news in the bbc, brussels attacks, belgium mourns amid hunt for suspects. In the wake of the detly attacks, belgian firms declare three days of national morning. Belgian Prime Minister charles urged citizens to show calmness and solidarity. The guardian, brussels bombing, first victims named as stories of survival emerge. The first publicly confirmed death was a 36yearold peruvian. Luiz lived in brussels with her husband and was at the airport to see off relatives. In nbc news. Com migration crisis looms in background of brussels terror attacks. National concerns stirred once again over the ongoing migrant crisis and the nations porous borders. In the washington times, pope francis speaks out against blind violence in brussels, in Bloomberg Financial analysts say renewed terrorist fears will likely cut down travel to europe. The horror we feel after the brussels terror attacks has sadly become part of the new normal. And yet, even under what some call a constant threat of terror, the world in which we live must still find a way to carry on. Heres harry smith with some final thoughts. Explosions rocking the airport and the citys subway system overnight. We click on the tv in the morning to see whats new. And we are stunned. As we watch the coverage, we connect our own dots. The arrest last week of the terrorists in belgium. The guy who got away from the attack in paris. We remember belgium, that neighborhood, molenbeek, did the belgian authorities miss something . If they did, then this is worse than we want to believe. The numbers, the resources, the commitment to wreak holy hell whenever possible. We hear the eye witness accounts. Shocking impact. The shock waves that hit just was like nothing ive ever felt before. Just another day stories turned into tales of survival. Our guard is up again. Just like every other time this happens. California, paris. We hold our loved ones closer and realize this feeling will fade in a few days. But we also now know this will happen again. Harry smith, nbc news, new york. Im dara brown, thanks for watching early today. Well see you back here tomorrow morning. One dalater. Brsels,europand tg one day later, brussels, europe and the rest of the world in shock and grieving from the terror attacks that unfolded in belgium. Plus conflicting reports about a terror suspect captured. Belgian media says that the third suspect in the brussels terror attacks is in custody. This hours after two brothers were identified as the suicide bombers behind the isis claimed attacks. And the bay area on alert, major met trees across the country are redoubling their efforts to keep us safe. Today in the bay starts right now. And a good wednesday morning to you. Thanks for joining us. Im laura garciacannon. And im sob. Many developments from brussels. First a quickhe