welcome to "world news tonight." protesters trying to stop donald trump in his tracks. taking to the streets in arizona, blocking the main road to a trump rally. the massive delays, the arrests and the rallying cry from phoenix to new york. while donald trump doubles down tonight. the passenger jet plunging to the ground, killing everyone onboard. a fireball lighting up the sky. was the pilot disoriented? details from the investigation coming in right now. the winter storm crashing spring break. from heavy rain to freezing temperatures, how much snow is in the forecast? the move to ban texting while walking. the number of pedestrian fatalities on the rise. is texting to blame? and the picture-perfect

pontiff, now on instagram, and breaking the internet within hours. #amen. good evening. thank you for joining us on this saturday. i'm cecilia vega. tonight, the pushback against donald trump louder and more forceful than ever. this, as voters in two more states now just days away from heading to the polls. in arizona today, protesters blocking the main road to his rally outside phoenix, some chaining themselves to cars, the traffic backing up for miles. anti-trump protesters taking to the streets right here in new york city, too. thousands of supporters did manage to make it to hear him speak. right there, you can see it, a massive rally and a sea of "make america great again" hats and republicans plotting their own strategy to stop him, as he heads closer to that republican nomination. abc's mary bruce starts us off tonight with the growing resistance and donald trump's

response. >> reporter: tonight, tensions rising across the country as trump faces new roadblocks. protesters outside phoenix blocking the main highway to a trump rally. demonstrating lining up, using their own cars to stop traffic. gridlock for miles. three arrested. those cars eventually towed out of the way. sherriff joe arpaio, a lightning rod for controversy, coming to trump's defense. >> if they think they are going to intimidate you and the next president of the united states, not going to happen. not in this town. >> reporter: and in new york, thousands taking to the streets outside trump tower, clashing with the front-runner's supporters. this, as the republican establishment tonight tries to block trump's road to the nomination. >> you have the establishment, they don't know what they're doing, they have no clue. >> reporter: top republicans, including mitt romney, now throwing their support behind ted cruz, as their last hope to

deny trump the delegates to take the nomination. >> we need to come together. >> reporter: in response, trump is taking aim at romney. >> this guy is a loser. >> reporter: and questioning his faith. >> are you sure he's a mormon? >> reporter: but cruz is punching back. >> it is disgraceful to call into question the faith of another. >> reporter: trump is also hurling new insults at an old foe -- fox news' megyn kelly. tweeting his supporters to boycott her show, calling her "highly overrated and crazy." fox firing back, saying trump's "extreme, sick obsession" with kelly is "beneath the dignity of a presidential candidate." now, the big prize on tuesday is that winner take all state of arizona. but republicans are already looking ahead. the establishment is now hoping ted cruz can win enough delegates to prevent trump from claiming the nomination before the convention. cecilia? >> mary bruce leading us off, tonight, thank you. we turn next to our other top story. all 62 people onboard killed in that plane crash, the final moments caught on video. a surveillance camera recording the impact in skies above

russia, hours after midnight, during rain and fierce winds. the aftermath a somber scene. pieces of that shattered plane scattered, landing on the runway. tonight, teams from the ntsb and the faa are joining the investigation. and abc's jennifer eccleston has the details of this fateful flight and the big question tonight -- what went wrong? >> reporter: security cameras capturing that flash of light against the night sky. the boeing 737 plunging to the ground. seconds later, the fireball. the plane erupting into flames. daybreak giving investigators their first look at the crash site. 55 passengers and seven crew lost. the flydubai facing near hurricane-force winds before landing. for two hours, the pilot circled the area in a holding pattern, then tried again. radar capturing the sudden drop,

3,000 feet in 15 seconds. >> given that we see it was night, it was bad weather, low fuel, the pilot was under pressure to get the airplane on the ground, everything suggests at this point that it was human error. >> reporter: investigators say there is no evidence of a terror plot like the one that brought down a russian plane last fall over egypt. still, the families of the victims overcome with grief and looking for answers. the ntsb is now headed to russia, where investigators say they're looking at weather, pilot error and mechanical failure as possible causes, but we know both of the plane's black boxes have now been recovered. cecilia? >> so many questions still, jennifer, thank you. we do have breaking news now from turkey. two americans killed if a suicide attack in the heart of istanbul. the lone bomber striking the city's popular shopping street. five people killed including the americans. 36 people injured. no one yet claiming responsibility. turkey has suffered several terror attacks in recent months.

isis and kurdish separatists being blamed. tonight, the white house condemning the terror attack. next, the hunt for most wanted man in europe, finally coming to an end. heavily-armed police in brussels capturing the final suspect in the paris terror attacks. but tonight, a new twist. investigators now saying salah abdeslam planned to commit a suicide bombing during those deadly attacks, but backed out at the last minute. here's abc's alex marquardt, reporting in from brussels. [ gunfire ] >> reporter: europe's most wanted man, tonight, behind bars and under interrogation. salah abdeslam, the lone surviving terrorist from the paris attacks, has admitted to authorities that, after he drove the car to france's biggest soccer stadium, he was supposed to be among the isis suicide bombers. but he didn't go through with it, the french prosecutor said, and fled to belgium. this image captured by

surveillance cameras in a gas station. it's the first major revelation since police cornered abdeslam yesterday. shot in the leg, he was dragged away and rushed to the hospital where he spent the night. for four months, this neighborhood, molenbeek, was the main focus of this massive manhunt. raids taking place across the area. in the end, he was found right here in this building, just a few hundred yards away from his family's home. >> it's been very difficult for law enforcement and security services to really penetrate these heavily immigrant neighborhoods in cities like brussels, so they don't have sources, they don't have a lot of information. >> reporter: abdeslam was charged today with terrorist murder, and being part of a terrorist group. four others, including three from a single family, were detained after that raid. two of them charged with hiding a criminal. >> the real key from this arrest is the opportunity to interrogate abdeslam, find out who else he may have been working with, find out more about his ties to isis. >> reporter: abdeslam's lawyer told reporters his client is

cooperating, but that they will fight, having him sent to france, where he helped kill 130 people. belgian authorities will keep interrogating him, but the french said today they expect to have him handed over at some point in the next 90 days. >> okay, alex, thank you. tomorrow, president obama heads to cuba. for the first official visit by an american president in more than 80 years. havana undergoing a face-lift ahead of the big visit. a big step in bringing the two countries together. workers there painting, planting trees and repairing the roads. and abc will be right there when president obama arrives, and on monday, our david muir has an exclusive interview with the president, right here on "world news tonight." and to the weather now, severe storms and snow on the move at this hour. tomorrow, the first day of spring, but tonight, freeze and winter alerts from the south to the northeast. storms bringing heavy rain to corpus christi, texas, and this water spout off a beach in ft. lauderdale, florida.

and here in the north, snow for some spring breakers in pennsylvania. abc's senior meteorologist rob marciano, good to have you back with us on the weekend. but this forecast feels more like winter than spring. >> it's been a mild winter. a little carryover. as we head into the first day of spring. i want to talk about the severe weather across the south, you mentioned the waterspout. severe weather there and the snow across parts of southern pennsylvania, especially at higher elevations west of d.c., that will continue. you see some rain getting into atlantic city. we'll see this low develop off the coast tonight and tomorrow. by 7:00 p.m., some snow gets into new jersey. then it really scoots off the coast. i will just be far enough that we won't get a blockbuster storm. but monday morning, the commute will be a bit of a mess there. five to seven inches in eastern mass. one to two here in new york city. cecilia. >> rob, great to have you back again. thank you. we want to move on to scene on a highway in indiana. the school bus carrying a high school basketball team, overturning, crushed. police said another driver

sideswiped the bus when the lid of her drink came off, the contents spilling. players and coaches in the hospital, instead on the court. missing the semifinals. none of the injuries, thankfully, were life-threatening. next, to a health alert about lead in the water. the crisis in michigan making it a national headline. now schools in new jersey, under scrutiny, and there are so many others. abc's eva pilgrim with the cry crisis putting children at risk. >> reporter: tonight, new jersey officials testing faucets at all public schools in the city of newark, after finding lead in the drinking water. parents are outraged. >> you don't care! >> we demand accountability. >> reporter: as many as 17,000 kids may have been exposed to the toxic water. many now undergoing blood tests. the city telling abc news a teacher alerted the district about discolored water. further testing revealing the lead. families, afraid their community could become another flint, michigan. >> i don't want people to get into a crisis thinking that there's something like on the scale of flint or that level.

it's absolutely nowhere near that. >> reporter: now, worried the problem stretches well beyond flint and newark. a "usa today" investigation finding alarming lead levels over the past few years in the water of schools and day care centers in 42 states. one school in maine with lead levels 41 times higher than the epa limit. the epa saying that lead has been an issue here in newark schools since 2003. the mayor's office blaming bad recordkeeping and communication for why this hasn't been addressed. cecilia? >> eva, thank you. we move on now to a frightening moment on a flight to hawaii. a passenger watching a movie on her iphone went suddenly it burst into flames and ends up looking like this. abc's linzie janis tonight with the two big questions -- what happened and can it happen again? >> reporter: tonight, these images of a charred phone, evidence of a mid-flight fire scare. >> i immediately thought, like, this is the end.

we're going down. >> reporter: college sophomore anna crail was on her way from bellingham, washington, to honolulu, watching a movie on her iphone, when she says, it suddenly burst into flames. >> there was, like, eight-inch flames shooting out of my phone. >> reporter: with a blanket, she smothered the fire, putting it out in under 30 seconds. iphone fires have happened before, but they are rare. this atlanta man's refurbished iphone caught fire in his pocket in december. the same thing happened to this girl in philadelphia last may. >> the biggest threat is having something buried inside a bag or in an overhead come apartment, and that's something like a heferboard has a higher propence till of being more dangerous. >> reporter: apple did not respond for our request to comment. but crail said they contacted her. the faa is also investigating. linzie janis, abc news. well, like it or not, tax time is fast approaching. and with that, a warning tonight. if your return was hacked last year, watch out.

it could happen again. here's abc's lauren lyster. >> reporter: tonight, as millions of americans are preparing to file their taxes, a warning. >> there's an issue with your federal refund, and it's been rejected by the irs. >> reporter: the growing threat of tax return fraud happening to victims not once, but twice. you're the victim of fraud against this year, what was your reaction? >> oh, i was angry. i was so angry. >> reporter: last year, hackers grabbing michelle quinn's refund, diverting it to a bank account that wasn't hers. this year, crooks beating her to it again. filing a fake return. how much is this happening, where someone is a victim, not once, but twice? >> nobody's really sure yet, because this is sort of a new and unfortunately growing area. >> reporter: to combat the problem, the irs adding an extra level of security for fraud victims. issues pin numbers for 2.7 million taxpayers. this month, the irs suspending the online tool. they found 800 fraudulent returns using those very pins.

and those are just the ones they caught. to protect against praud, use long and strong passwords. don't fall for phishing scams or for a phone call saying it was the irs. >> within the next hour they will be at your doorstep to handcuff you and put you behind bars. >> and what is michelle quinn doing to avoid being a victim a third time? she signed up for a program that tracks any time your identity is used. it can take up to 300 days to see your refund if you're a victim. >> a good warning as tax time is approaching. thank you, lauren. great to have you with us on this saturday. still ahead on "world news tonight" this saturday, the 21st century habit so many of us have, it now may no longer get the green light. news tonight for those of us who walk and text at the same time. and, oh, baby. the eagle cam that has captivated a nation. so, what happened today? the home movies you do not want to miss.

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about a vaccine that can help prevent shingles. we have all done it, texting while walking. well, it may not be allowed for much longer in some places. some lawmakers are trying to crack down on what they call a high-risk habit. here's abc's kendis gibson. >> reporter: tonight, a new push to make this a criminal offense. distracted walking. >> even headphones are bad. headphones are bad, because you're not really paying attention to where you're really going. >> reporter: so dangerous. >> i've been caught a couple of times, like, about to get hit by a car. >> reporter: a new jersey assemblywoman introduced a bill making violators subject to a $50 fine or 15 days in jail. it doesn't matter if you have the right of way, the bill states, if you're in a crosswalk, your phone has to be put away and you have to be hands-free. our abc cameras rolling as one after the other, in just an hour, pedestrians caught texting in new york city, where it is legal. this, as cameras capture mishaps of distracted walking.

this man nearly runs into a bear in a california neighborhood. while a fast-moving robber in london takes advantage of this guy's distraction. recent numbers from the governors highway safety association show a 10% spike in pedestrian fatalities in the first six months of last year. experts calling cell phone distraction a big problem. >> the smartphone is the newest and arguably one of the most dangerous forms of distraction. >> reporter: now, lawmakers hoping to stop this increasingly dangerous habit in its tracks. kendis gibson, abc news, new york. when we come back on this saturday night, the video causing outrage and now, sparking an investigation. what this officer does to a handcuffed suspect, all caught on camera. and #elpapa. the pope's new online adventure. why he says he's joining the masses on instagram. woman. or where you're from. city. country.

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well, finally tonight, pope francis has described the internet as a gift from god and he is seeing some godly numbers on his first day on instagram. a million followers and counting. on track to beat david beckham on his first day. #instapope is, yes, now a very real thing. with the tap of a finger, almost as if from on high, his holiness joins the masses. his first picture, the pope deep in prayer. the words "pray for me" in nine languages. today, the new account, @franciscus -- latin for francis -- attracting more than 100,000 followers per hour. pope francis going viral faster

than you can say holy hashtag. >> pictures of pope francis go viral, so it's a match made in heaven, you could say. >> reporter: instagram's ceo there for the big launch. >> the power of an image was that it could transcend culture or language and it can speak to anyone anywhere in the world. the sky's really the limit for him. >> reporter: new traditions for an old institution. this pope, already perfecting the photo-op. from the first family, to little kristupas. during his u.s. visit last year, i even got in on the action. #selfiegoals. pope francis might already be the coolest pope of all, but if he is praying for true instagram success, he'll have to step up his selfie game. #blessed. a million followers and counting already. "gma" and "this week" in the morning. we will see you right back here tomorrow night with, of course, david's special broadcast from cuba. thank you for joining us on this saturday. i'm cecilia vega. have a great night.