among those trapped, and you'll hear froro them tonight. authorities now putting out this image. three suspects at theairport, two of them believed to be the suicidbombers. the third man on the right they believe is on the run at this hour. will analyze what else is in that photo. the first blasts at the airport, afterwards, smoke and dust, the injured crying for help. and then, on the subway, in the center of the city, the next explosion. you can hear the cries, passengers running in the dark. tonight, at least 31 killed, more than 200 injured. we have team coverage here, and we begin with abc's alex marquardt on the scene, taking us through the terrifying moments and the investigation now. >> reporter: tonight, terror striking in the heart of europe. beium's main airport, a smoky warzone. the city paralyzed. the attackers hit at the height of rush hour. those three men, police believe, walking into the busy airport. around 8:00 a.m., two blasts.

checkpoint. the terminal filled with smoke and the sound of screams. travelers lying top of each other on the floor. this man holdidi a little girl. >> stay down. stay down. >> reporter: people huddled in fear. and then, the questions. >> what it was? a truck or was it a terrorist? >> reporter: this man picked his small baby up off the floor before running to safety. the bombs so powerful that ceilings collapsed. the wounded treated amid the rubble. airport security scanning for victims. >> you have to go outside. >> okay, oka >> reporter: ordering people to evacuate. they r rh out of the terminal, glass crunching underfoot. outside, smoke pouring out of shattered windows as people raced away. >> we saw a lot of people really badly injured, with a lot of blood. and we know that it was even worse inside, but we could not see anything because of the

>> reporter: at least ten dead here and more than 100 injured, including g ne americans. mormon missionaries richard norby, joseph empey andmason wells, but the horror was still unfolding. 9:11 a.m., just an hour after the airport explosions, seven miles away, another bomb goes off near theffices of the european union. this time, in a packed metro car,2as it was leaving the station. in the dark tunnel, passengers climbed out of train cars. the terrified screams of a child. the path to safety down the dimly-lit tracks. this man still clutching a bouquet of flowers. in other metro cars, people waited, confused. >> more panic set in. some people started running, some people started crying, some people just stood still in disbelief and tried to mauck sense of whatever was going on. >> reporter: the car where the

metal. outside, more smoke as the sidewalk becomes a makeshift triage center. first responders carrying some victims. others sitting dazed, as ambulances rushed to the scene. at leaea 21 people dead. more than 100 wounded here, too. and at 4:19 p.m., eight hours after the terror began, isis aimed responsibility. brussels tonight, a city gripped by fear and uncertainty. this is normally one of the busiest avenues in brussels, just outsidedehe european commission near. you can see the flags back there now flying at half staff. this road should be full of cars. now, at rush hour, instead, as you can see, it's eerily empty, shut down by police. the threat level here raised to the highest level. police now looking for this man, the third suspected bomber. police shoopchoppers in the air, residents told to stay inside, watching from windows as

>> alex marquardt is near the site of the metro bombing now. and alex, the u.s. embassy tonight telling americans in brussels to shelter in place? >> reporter: that's right, david. that warning going out this afternoon, iicating that belgian authorities fear what they call a serious and imminent attack. most of the public transportation system here in brussels is still shut down, so, so much of this city tonight, emotionally and physically paralyzed. david? >> and the world stands with that city tonight. alex, thank you. we're going to turn next here to the urgent manhunt right now on the trail of that terror. isis taking responsibility. investigators now lasers in on clues in this surveillance image. we showed it to you at the top of the broadcast. two of the suspects wearing gloves. the other man on theight there is not. and they are searching for him tonight. abc's chie investigative correspondent brian ross now. >> reporter: they look grim and d determined as they push luggage carts through the brussels airport, now identified by

suspected attack team. the two dressed in black with no effort to hide their faces are believed to have been the suicide bombers. their bombs hidden in their large suitcases, according to officials. each wearing a black glove on the left hand, perhaps to hide the bomb's trigger according to one former fbi official. >> whether its wires, strings, a button, something is in there that when they move their hand, it actually makes the bomb go off. >> reporter: the third man, who authorities say got away and is being sought tonight, has a hat pulled down over his face, pushing what may have been the third bomb that authorities say did not detonate. >> the other individual could be their handler. he wants to be able to live for another day, for another terrorist attack. >> reporter: bomb experts night are studying the aftermath of the devices set off at the airport, but already, they say, t third bomb at the metro stop in brussels appears to be much more powerful than the explosives used in paris

this x-ray of one of the victims shows how the bombers used three inch metal bolts as shrapnel, tearing through flesh at a rate of about a mile a second. >> isis is very good at this sort of thing, that they know how to plan and they have the resources. >> this is all very alarming tonight. brian ross with us now, and brian, your sources telelng you that this is all part of an effort bysis to sort of direct these sleeper cells all across europe? >> reporter: that's right, david. isis has been organizing fighters by nationality and language. among the top targets, belgium and france, of course, along with germany, britain, and the u.s. >> all right, brian ross with us tonight. brian, thank you. and brian, as you know, we're hearing this evening from the americans who were trapped he middle of the terror today. i spoke with brian carroll from washington, d.c., who was on that train. he helped pry the door open after the explosion. >> as i was leaving in the morning, i saw on my phone that there had been some news of an

actually hesitated for a minute, before i got on the metro this morning. >> can you just describe for me the moment when you knew something had gone wrong? >> yeah, it was almost immediately. as we're pulliling into the maalbeek station, there was a massive explosion. the lights went out. the power went out on the train. everyoyo fell to the ground. it was clear to me, at least, that this was a terrorist attack. >> no question in your mind, that you had to pry those doors open? >> yeah, i saw the people going for the door, it wasn't opening and i ought, you know what, we don't know who else is on this train or, you know, the attacker might be on the train itself, our maybe there will be more explosions. one of the other passengers went to try and open the door and it was difficult and so, collectively, we all manually forced open the door, we just decided to go for it and get off the train and try and find safety. >> can you take us through that moment, how the other people on the trainreacted when you all

>> yeah, i mean, it was really like a, you know, sort of loud, really a loud sound. immediately, everyone started screaming and people dropped to the floor. people were crying. holding, you know, holding each other in fear. i mean, it was a nightmare. it was exactly -- the worst nightmare you could imagine. >> have you had a chance to talk to your family back home? >> yeah, yeah, of course, i sent them, you know, i sent them multiple messages and we've spoken already, so, of course they with very relieved to know i'm safe. >> brian, it was brave work getting those doors open to help everyone out and we're glad you're okay. >> definitely a a collective effort and it wasn't my first instinct, but we got the door open and everyone at least in my train got out. >> and we talked with shireen who was in the airport with her boyfriend at the ticket counter. >> the second i heard it, i mean, i felt it, i can still feel it in my chest now, the first blast, and debris and

still smell it. it was -- it was crazy. i mean, it was horrific, honestly, i couldn't imagine a more ofhorrific thing. >> you and your boyfriend, jeff, obviously, ran for your own safety. >> he kind of brought me back to reality when he ran towards me and he jumped over me and, like, shielded me from the second blast. the lady had my passport, she was checking me in. he pushed me under there and she was such a sweetheart, i wish i could remember her name, aaron air american airlines tendant. she held me underneath her station and we kind of both, like, bunkered down there and jeff, my boyfriend, was right in between. >> we're glad that you and your boyfriend are okay, and, of course, the ticketing agenen who consoled you behind that counter. >> oh, yeah. i wish i got her name, she was such a sweetheart, she grabbed my hand and she hugged me and she pulled me in, like, right next to her, so, god bless her,

>> she told me she's determined to find that american airlines agent whoho consoled her. in the meantime, we turn next here to the high s s ss raid on a brussels neighborhood that authorities now say may have set today's attacks in motion. it was just four days ago here, we reported on heavily-armed police forces setting off this series of explosions here, the smoke rising into the air, and then the arrests, including the most wanted man after the paris attacks, captured after a four-month manhunt. authoritiess interrogating him, and what he told police led them to warn thatt another attack was imminent. abs chief foreign correspondent terry moran on what might have ignited the attacks today. >> reporter: the manhunt triggers raids across brussels. guns drawn, a drone overhead. police move in, using a camera on a stick to peer into an upper floor apartment. these people evacuated through a window. residents gathered to watch. "they did not allow me to go inside or outside," this man said. "the people living there can no go out."

night. the raids have targeted this neighborhood, just a mile or so from dotown. this whole block has been cordoned off, and they have found yet another explosive device packed with nails, chememal products and an isis flag. totoght, authorities are investigating whether today's carnage was triggered by this raid four days ago. the one thah took down salah abdeslam from the paris attacks in november. the most wanted man in europe, l the while hiding right under the noses of belgian authorities. authorities say, in custody, abdeslam even admitted planning other attacks, allhile hiding in molenbeek. this country sends more foreign fighters to iraq and syriathan any other european nation. tonight, all europe is asking, how many of them h he come back to wage a war of terror here? >> and terry moran joins us live from brussels, as well, tonight.

attackers might have been right under their nose in neighborhoods that had been investigated already. why has it been s difficult to get theseseuys before the attacks? >> reporter: you know, david, belgium has long been seen as a weak link in european counterterrorism. it's a divided country, divided by language, divided by politics, and immigrant communitiessre not well assimilated. every country has cracks and kref valss where criminals and terrorists can hide. here, those cracks are a mile wide. david? >> terry moran, thank you. and the terror attacks there in brussels puttingamericans on edge here at home. especially at airports and train stations. the subways. this plane arriving in orlando today from brussels forced to stop far from the terminal. a line of police cars meeting there. it was all a precaution while they searched the luggage. and partal of the denver airport evacuated today after a a security scare there. and in the subways and on train across this country, hundreds more police now on duty.

show of force right here in new york city tonight. >> reporter: these images of the bombed-out subwayay in brussels striking fear into the hearts of american come muters. across the country tonight, a heightened state of vigilance. in new york city, thousands of additional officers at the ready. >> this is something we think about every minute of every day. >> reporter: beefed up security monitoring the subway, complete wqth bag searches and k-9 units. something we witnessed firsthand as we took a subway to grand central station, where more than 750,000 people stream through every day. do you find yourself being more vigilant today? >> absolutely. keep your eyes open, watching what's going around. we've seen a lot more police presence. >> always aware of my surroundings. look left and right, up and down. >> reporter: while there is no current intelligence that suggests a threat in these american cities, from washington, d.c. to chicago to los angeles, authorities are increasing security and

>> we hope that powers that be areoing what they need to do. >> reporter: and security is not just beefed up on subways, but airports are also on high alert, and briing in additional armed patrols and k-9 units. david? >> linsey davis, thank you. there is still much more ahead on with special edition of "world news tonight." the presidential candidates weighing in today. what hillary c cnton said, reacting to donald trump, and what he said about waterboarding. two very different views from both front-runners on how they would respond to the terror today. as our scial edition of "world news tonight" continues.t the hospital after a dvt blood clot. what about my wife... ...what we're building together... ...and could this happen again? i was given warfarin in the hospital, but wondered, was this the best treatment for me? i spoke to my doctor and she told me about eliquis. eliquis treats dvt and pe blood clots and reduces the risk of them happening again. not only does eliquis treat dvt and pe blood clots. but eliquis also had

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the presidential candidates would handle the attacks. >> reporter: tonight, terrorism at the forefront of f e race for president. gop front-runner donald trump on "gma," saying he'dse waterboarding and worse to get information from salah abdeslam, the paris attacker, recently captured in belgium.h >> i would use maximum, maximum interrogation technique. i would have waterboarding and i would go a sp further. we could have probably cut this off if they used the right technique and used the right technique on him. >> reporter: but hillary clinton blasting trump's approach. >> i don't think they need to resort to torture. you know, that's like an on recruitment poster for more terrorists, and it's wrong and it doesn't work. >> repter: senator ted cruz with his own solution -- patrors of muslims neighborhoods in the u.s. >> it is standard good policing to direct your resources to where the threat is coming from. we should do the exact same thing with radical islamic terrorism. >> reporter: senator bernie

wrong, but unconstitutional. >> we are fighting a terrorist organization. we are not fighting a religion. >> reporter: and governor kasich agreeing. >> in our country, we don't want to create divisions where we say okay your religion, you're a muslim, so therefore we're going to keep an eye on you. >> reporter: and david, tonight, donald trump saying he agrees 100% with senator ted cruz, that police should patrol muslim neighborhoods in the u.s. david? >> tom llamas live in washington tonight. tom, thank you. and when we come back here on this special edition, new reporting tonight on why the presidenen did not leave cuba after word of the attacks. and the images coming in right now. what's being done around the worl and right here in new york city to honor the victims, as we continiue tonight.macular degeneration, amd we came up with a plan to help reduce my risk of progression. and everywhere i look... i'm reminded to stick to my plan. including preservision areds 2. my doctor said preservision areds 2 has the exact nutrient formula

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tonight, we're learning more about why president obama decided to stay in cueba after learning of the terror attacks. but this is how he began his historic televised speech to the cuban people today. >> the thoughts and the prayers of the american people are with the people of belgium, and we stand in solidarity with them in condemning these outrageous attacks against innocent people. we will do whatever is necessaryry to support our friend and ally, belgium, in bringing to j jtice those who are responsible. and this is yet another reminder that the world must unite. >> the president in cuba today. let's bring in our chief white house correspondent jonathan karl. and jon, what a difference 24 hours makes. just standing with you in cuba this time last night. you' learned more information tonight about what went into the president's decision to stay there in cuba for that game between the tampa bay rays and the cuban national team. >> reporter: david, thiss an

but there was a more profound reason that the white houou was determined to go forward as scheduled today. the president put it himlf this way when he was at that game. he said the whole premise of terrorism is to disrupt people's lives. so, the mere act of going to that game was a political act, a statement that terrorism must not and cannot be allowed to disrupt our way of life. david? >> all right, jon karl in cuba tonight. jon, thank you. when we come back here, what's being done right here in new york city tonight. and a spontaneous tribute in brussels written in chalklanguages, all sharing the same message tonight. we'll be right back. stock prices, earnings, and dividends... an equity summary score that consolidates the stock ratings of top anysts into a single score... and $7.95 online u.s. equity trades, lower than td ameritrade, schwab, and e-trade, you realize the smartest investing ia

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written in chalk. a police officer lighting a candle. and tonight, the colors of the belgian flag, as the world now honors the victims. and here inn new york city, the world trade center to be lit in the colors of the belgigi flag later tonight. for many, this hour-long edition continues in a moment.

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