tonight, a special edition of "world news tonight." the deadly terror attacks in brussels. at the airport. >> stay down. the americans caught in the middle of it all. three deadly explosions rocketing the city. tonight, isis reportedly claiming responsibility. dozens killed. more than 200 hurt. this image leading to an urgent manhunt at this hour. what authorities have spotted in the surveillance photo. passengers escaping the subway in the dark and smoke. i talk with the american man who pried the door open. >> it was a nightmare. >> and the virginia woman who hid behind the counter at the airport with the ticketing

while here at home tonight, images from the subway in new york city. amid questions about our own security. the tense moment at an american airport, the passenger jet met by authorities. and the fbi tonight. we ask, how will lone wolves are they tracking right now in the u.s.? we have team coverage. "world news tonight" guns now. from abc news, this is a special edition of "world news tonight" with david muir. brussels under attack. good evening on this tuesday night, as this country and the world now reacts to another series of deadly terror attacks. tonight, the urgent manhunt right now, after the city of brussels is rocked with multiple explosions, at the airport and then in the subway. americans among the injured, among those trapped, and you'll hear from them tonight. authorities now putting out this image. three suspects at the airport, two of them believed to be the suicide bombers. the third man on the right they believe is on the run at this hour.

that photo. the first blasts at the airport, afterwards, smoke and dust, the injured crying for help. and then, on the subway, in the 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. belgium'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. suicide bombers in the departure hall outside the security checkpoint. the terminal filled with smoke and the sound of screams. travelers lying top of each other on the floor.

>> 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, okay. >> reporter: ordering people to evacuate. they rush 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 smoke. >> reporter: at least ten dead here and more than 100 injured, including nine americans. mormon missionaries richard

wells, but the horror was still unfolding. 9:11 a.m., just an hour after the airport explosions, seven miles away, another bomb goes european union. this time, in a packed metro car, as it was leaving the station. climbed out of train cars. the terrified screams of a child. the path to safety down the 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 bomb went off, a twisted mass of metal. outside, more smoke as the sidewalk becomes a makeshift triage center. first responders carrying some victims.

ambulances rushed to the scene. at least 21 people dead. more than 100 wounded here, too. and at 4:19 p.m., eight hours after the terror began, isis claimed responsibility. brussels tonight, a city gripped by fear and uncertainty. this is normally one of the busiest avenues in brussels, just outside the 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 shoop choppers in the air, residents told to stay inside, watching from windows as officers patrol rooftoops. >> 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.

afternoon, indicating that belgian authorities fear what 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 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 image. we showed it to you at the top of the broadcast. two of the suspects wearing gloves. the other man on the right there is not. and they are searching for him tonight. abc's chief investigative correspondent brian ross now. >> reporter: they look grim and determined as they push luggage carts through the brussels airport, now identified by belgian authorities as the 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.

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 tonight are studying the aftermath of the devices set off at the airport, but already, they say, the third bomb at the metro stop in brussels appears to be much more powerful than the explosives used in paris last november. 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

>> this is all very alarming tonight. brian ross with us now, and brian, your sources telling you that this is all part of an effort by isis 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 in the 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 attack in the airport, and -- 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?

as we're pulling into the maalbeek station, there was a massive explosion. the lights went out. the power went out on the train. everyone 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 thought, 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 train reacted when you all realized that this was an explosion on the train? >> 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.

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 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 smoke was everywhere, i can still smell it. it was -- it was crazy. i mean, it was horrific, honestly, i couldn't imagine a

>> 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 attendant. 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 agent 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, i hope she's okay. >> she told me she's determined to find that american airlines agent who consoled her. in the meantime, we turn next here to the high stakes raid on a brussels neighborhood that authorities now say may have set today's attacks in

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. authorities interrogating him, and what he told police led them to warn that another attack was imminent. abc's 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." the sweep lasting deep into the night. the raids have targeted this neighborhood, just a mile or so from downtown. this whole block has been cordoned off, and they have found yet another explosive

chemical products and an isis flag. tonight, authorities are investigating whether today's carnage was triggered by this raid four days ago. the one that took down salah abdeslam from the paris attacks in november. the most wanted man in europe, all the while hiding right under the noses of belgian authorities. authorities say, in custody, abdeslam even admitted planning other attacks, all while hiding in molenbeek. this country sends more foreign fighters to iraq and syria than any other european nation. tonight, all europe is asking, how many of them have come back to wage a war of terror here? >> and terry moran joins us live from brussels, as well, tonight. terry, it would appear the attackers might have been right under their nose in neighborhoods that had been investigated already. why has it been so difficult to get these guys before the attacks? >> reporter: you know, david, belgium has long been seen as a

counterterrorism. it's a divided country, divided by language, divided by politics, and immigrant communities are 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 putting americans 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 security scare there. and in the subways and on trains across this country, hundreds more police now on duty. abc's linsey davis on the major show of force right here in new york city tonight. >> reporter: these images of the bombed-out subways in brussels striking fear into the hearts of american come muters.

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 with 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 deploying extra officers. >> we hope that powers that be are doing what they need to do. >> reporter: and security is not just beefed up on subways, but airports are also on high alert, and bringing in additional armed

>> 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 clinton said, reacting to donald trump, and waterboarding. two very different views from both front-runners on how they today. as our special edition of "world 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? pi spoke to my doctor and she told me about eliquis. peliquis treats dvt and pe blood clots pand reduces the risk of them happening again. pnot only does eliquis treat dvt and pe blood clots. z but eliquis also had x significantly less major x bleeding than zthe standard treatment. knowing eliquis had both... ...turned around my thinking. ndon't stop eliquis unless you doctor tells you to. neliquis can cause serious, and in rare cases, fatal bleeding. ndon't take eliquis if you have

nor abnormal bleeding. nif you had a spinal injection while on eliquis ncall your doctor right away if you have tingling, nnumbness, or muscle weakness. nwhile taking eliquis, you may bruise more easily... nand it may take longer than usual nfor bleeding to stop. nseek immediate medical care for sudden signs of bleeding, nlike unusual bruising. neliquis may increase your bleeding risk nif you take certain medicines. ntell your doctor about all planned medical nor dental procedures. eliquisz treats dvt z & pe blood clots. plus had lessx major bleeding. z both made switching z to eliquis right for me.

allergies with nasal congestion? find fast relief behind the counter with claritin-d. [ upbeat music ] strut past that aisle for the allergy relief that starts working in as little as 30 minutes and contains the best oral decongestant. live claritin clear, with claritin-d. next tonight here, to the immediate reaction right here at home, from the two front-runners in the race for president. and president obama himself observing a moment of silence in havana, before that historic game, the tampa bay rays playing the cuban national team. but it was what donald trump said about waterboarding and what else he would do that had hillary clinton responding and quickly. here's abc's tom llamas with how the presidential candidates would handle the attacks. >> reporter: tonight, terrorism at the forefront of the race for president. "gma," saying he'd use

information from salah abdeslam, the paris attacker, recently captured in belgium. >> i would use maximum, maximum interrogation technique. i would have waterboarding and i would go a step 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. >> reporter: senator ted cruz with his own solution -- patrols of muslims neighborhoods in the u.s. >> it is standard good policing to direct your resources to where the threat is coming from. thing with radical islamic terrorism. >> reporter: senator bernie sanders calling that not only 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

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 president did not leave cuba after word of the attacks. and the images coming in right now. what's being done around the world and right here in new york city to honor the victims, as we continue 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 that the national eye institute recommends to help reduce the risk of progression of moderate to advanced amd... after 15 years of clinical studies. preservision areds 2. because my eyes are everything. constipated?

use dulcolax tablets for gentle overnight relief suppositories for relief in minutes and stool softeners for comfortable relief of hard stools. dulcolax, designed for dependable relief shopping for an suv? well, this is the time. and your ford dealer is the place, to get 0% financing for 60 months on a ford suv. that's right. just announced. ford explorer...edge...escape... and expedition... are available with 0% financing for 60 months. ford suvs. designed to help you be unstoppable. no wonder ford is america's best but hurry, 0% financing for 60 months on ford suvs is a limited time offer. see your ford dealer today. good news. you're down with crestor. now there's a way adding crestor, along with diet, crestor is not for or women who are nursing,pregnant, tell your doctor all medicines you take. call your doctor or weakness;

have loss of appetite, upper belly pain, dark urine or yellowing of skin or eyes. these could be signs of serious side effects. ask your doctor about crestor. financial advisor, up that stock again? well you need to think about my dad gave me those shares, you know. he ran that company. i get it. but you know i think you own too much. gotta manage your risk. and you've gotta an honest opinion, even if you disagree. with 13,000 it's how edward jones makes sense of investing. your body was made for better things than before you and your rheumatologist move to a biologic, ask if xeljanz is right for you. xeljanz is a small pill for adults with moderate to severe ra for whom methotrexate

xeljanz can reduce joint pain and swelling in as little as two weeks, and help stop further joint damage. xeljanz can lower your ability to fight infections, including tuberculosis. serious, sometimes fatal infections, lymphoma, and other cancers have happened. don't start xeljanz if you have an infection. tears in the stomach or intestines, low blood cell counts, and higher liver tests and cholesterol levels have happened. your doctor should perform blood tests before you start and while taking xeljanz, and monitor certain liver tests. tell your doctor if you were in a region where fungal infections are common, and if you have had tb, hepatitis b or c, or are prone to infections. r xeljanz can reduce r the symptoms of ra, p even without methotrexate. rask your rheumatologist t about xeljanz. tonight, we're learning more about why president obama decided to stay in cue ba after learning of the terror attacks. but this is how he began his

>> 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 necessary to support our friend and ally, belgium, in bringing to justice 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've 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, this is an historic day, an historic trip, but there was a more profound reason that the white house was determined to go forward as scheduled today. the president put it himself this way when he was at that game. he said the whole premise of

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 analysts 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 idea isn't just what you invest in,

nexium 24hr is the new #1 selling frequent heartburn brand in america. i hope you like it spicy! get complete protection with the purple pill. the new leader in frequent heartburn. that's nexium level protection. everyone's lookin' red carpet ready. my man, lemme guess who you're wearing... toenail fungus!? whaaat?!? fight it! with jublia. jublia is a prescription medicine... ...used to treat toenail fungus. use jublia as instructed by your doctor. jublia is workin' it! most common side effects include... ...ingrown toenail, application site redness,... ...itching, swelling, burning... ...or stinging, blisters, and pain. oh!! fight it! with jublia! now that's a

jublia is right for you. visit our website for savings on larger size. to you, they're more than just a pet. so protect them with k9 advantix ii. it kills fleas, ticks and mosquitoes. k9 advantix ii. for the love of dog. when my chronic pain got bad, my doctor prescribed medication-an opioid. it really helped! but it came with some baggage: opioid-induced constipation-oic. sooo awkward... you sound like you're ready for the movantalk! opioids block pain signals. but they can also block activity in the bowel, causing constipation. movantik can help reduce constipation caused by opioid pain medications. do not take movantik if you have a bowel blockage or a history of them. serious side effects may include a tear in your stomach or intestine. and can also include symptoms of opioid withdrawal. common side effects include

and headache. tell your doctor about any side effects and about medicines you take as movantik may interact with them causing side effects. i'm so glad i had the movantalk with my doctor! constipated by your prescription opioid pain medication? ask your doctor if movantik is right for you. if you can't afford your medication, astrazeneca may be able to help. tonight, in brussels, powerful images catching the world's attention. people sharing words of comfort, 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 in new york city, the world trade center to be lit in the colors of the belgian flag

for many, this hour-long edition

our special one-hour edition of "world news tonight" continues right now with new reporting at this hour. the urgent manhunt under way. the intense focus on this surveillance image. after those three deadly explosions rocked brussels. dozens dead. more than 200 injures. several americans among them. this half hour, the stories behind the american victims. why they were there, what are their injuries? the security here at home. the debate, what more can be done at airports? and the war on isis. martha raddatz tonight, and the images from the american targets. are we gaining any ground?