Children will catch potentially deadly cases this season. Nightly news begins right now. From nbc news World Headquarters in new york, this is nbc nightly news with lester holt. Good evening. What happened this morning just outside new york city is among the worst nightmares for more than one million americans who ride commuter trains to work each day. It happened at the height of the rush in hoboken, new jersey. A train filled with mostly manhattanbound commuters failed to end of the line, smashing into a barrier at high speed and into the station itself. One person was killed and more than a hundred were injured. Some severely hurt. The man at the controls at the time is among the survivors and may be able to answer the question of what went so terribly wrong. Nbcs tom costello has the latest from the scene. Reporter 8 45 a. M. I have heavy structural damage. I have people trapped on the train. Major, major casualties. Reporter a violent suddenly exploded through the morning rush in hoboken as new Jersey Transit train 1614 came screaming into the train station, jumped the end of track bumpers on platform five and tore right into the central hall. Passengers on the train and on the platform crushed under falling debris. We just heard people screaming in the first car. They were trapped, they couldnt get out. Then i just heard these horrifying terrible screams coming out and shrieks. You know, loud, loud for their lives. Reporter glass, steel support beams and bricks came crashing down. We helped them out of the train. Reporter 34yearold Fabiola Bittar de kroon, a local mother, was killed while standing on the platform. More than a hundred other people injured, some able to walk to nearby hospitals but others transported with serious injuries. I thought we were going to die. I didnt think we would get out. Reporter 15,000 commuters go through hoboken station on their way to and from work in new york every traveled through new jersey and scheduled to arrive at hoboken at 8 38. But rather than approach hoboken at 2 to 3 miles per hour, the train never slowed. It didnt stop, it didnt slow down. It didnt brake. Reporter tonight federal investigators are examining the train, the tracks, signals, the trains black box, and hoping to talk to the engineer. Was he distracted, asleep oar suffering a medical emergenc point as to speculating what happened, why did the train come in so fast. Reporter we know new Jersey Transit does not have the automatic braking system known as positive train control, a system that can prevent fatal crashes. The ntsb has been recommending positive train control, or ptc, for 40 years. Reporter no suggestion of terrorism. Tonight the engineer is identified as 48yearold tommy gallagher. Were told theres nothing in his background that would employer, or for that matter, any medical issue. By the way, lester, the speed limit posted to go into the train station, 10 miles per hour. Obviously trains going a lot slower. So why was this train going in so fast . We simply dont know. Back to you. All right, tom, we want to drill down on that Safety System you mentioned, positive train control. Its yet to be installed on an overwhelming majority of rail lines in this country. Where 1. 4 million commuters go by rail every day. As our Miguel Almaguer explains, critics are to be done to protect train passengers. Reporter lessons learned. The amtrak derailment in philadelphia last year left eight dead and more than 200 injured. The train traveling at speeds exceeding a hundred miles an hour. In chatsworth, california, 25 lost their lives, 125 hurt, when a commuter train slammed head on into a Freight Train in 2008. These, just two of the 145 rail accidents positive train control, or ptc. Year after year, were going to continue to see accidents that could have been prevented by ptc. Reporter the advanced braking system is designed to automatically stop a train before certain accidents, like those caused by speeding or ending in headon collisions. But only 22 of trains currently have the advanced braking system. While trains like this one in los angeles have ptc, there are ways to maximize your possible, ride in the center of a train, so theres less impact from collision. And also, face the rear. So during extreme braking, youre pushed into the seat and not across the aisle. Gerald atkins narrowly survived the chatsworth crash, the deadliest in metrolink history. He was seated in the first car. I always sit in the middle car, its the safest place. Dont sit in the back. Dont sit in the front. Reporter train commute. But tonight there are more questions on how to make it safer sooner. Miguel almaguer, nbc news, los angeles. Were learning much more about the teen accused of a shooting rampage at a South Carolina school playground. Two students and a teacher were injured after the suspect allegedly killed his own father at another nearby scene. Now, as our Gabe Gutierrez tells us, police are trying to determine what may have driven him to reporter tonight in their search for a motive, investigators are looking into whether the suspected gunman may have been bullied. A source close to his family said the 14yearold was being homeschooled after he brought a machete and hatchet to his middle school earlier this year. We experienced a very devastating and lifechanging event. Reporter today an emotional fire chief, billy mcadams, described how he, along with volunteer firefighter jamie brock rushed to townville elementary, mcadams tended to the wounded, including critically injured while the unarmed brock took off after the suspect. Feeling it was imperative to the safety of the students, the teachers, and all the responders that were on site, he immediately confronted and subdued that shooter. Reporter this mans nephew was at the playground and has a message for jamie brock. Id call him godsent hero. And thats the truth. The suspected gunmans mother says our entire family is absolutely shocked and saddened by the senseless actions of our son. First police say the teen shot and killed his father, Jeffrey Osborne at the family home and then drove about two miles to the school. At 1 44 p. M. , they say he called his grandmother in tears. Her grandson was very distraught, she couldnt understand what he was saying. Reporter at 1 45 p. M. , shots fired near the schools playground. Teacher Meghan Hollingsworth was hit in the shoulder. She and others rushed students inside and locked the doors. Protect them. Reporter administrators are crediting repeated active shooter drills for saving lives. Gabe gutierrez, nbc news, townville, South Carolina. The chairman of wells fargo faced more Harsh Criticism today over bank and credit card accounts opened without the permission of customers in order to meet sales goals. This time it was from hostile members of congress, even after the ceo was stripped of 41 million in compensation and one of his fired employees was there to witness it all. More for us tonight. Reporter wells fargo employees say the pressure to cell was unbearable. We were led by fear and intimidation. Reporter julie miller was a Branch Manager in allentown, pennsylvania, once recognized by ceo john stumpf himself, but later fired for failing to meet aggressive sales goals. With seven checking accounts and 42 Product Solutions for my branch a day. Reporter she seat. As you came out here and apologized and said the buck stops with me, then you should be fired because it stops with you. Again, congressman, the board has that power. Reporter house members on both sides pressing the ceo to take more responsibility. Did wells fargo employees steal from a million to two million of their customers . Yes or no . In some cases, they did. Reporter no criminal charges have been filed, but wells fargo has paid a 185 he first learned of the problem in 2013. We begged and pleaded with family members, with relatives, with business owners, just to open accounts so that we wouldnt lose our jobs. Reporter consumer advocates say what happened at wells fargo could happen anywhere. Check your credit card statements every month. This is the type of routine personal finance maintenance that needs to be second nature. Reporter today the ceo announced that wells fargo is ending its aggressive sales goals on saturday, lawmakers say thats not enough. Jo ling kent, nbc news, washington. Some 20 Million People under flood alerts tonight up and down the east coast. In north carolina, 10 inches of rain fell in some areas, and rescuers went door to door saving people who were stranded. The threat continues into the night. They expect another 3 inches or mo to fall all the way up to pennsylvania. The weekend is expected to be a wet one for much of the mid atlantic and the northeast. We turn now to even more personal today between donald trump and Hillary Clinton, with bill clinton now emerging as fair game in the trump playbook. Then there was gary johnson, the thirdparty candidate and the tough time he had last night. We get more tonight from nbcs kristen welker. Reporter Hillary Clinton in iowa today, bracing for an onslaught of new attacks, with the trump team signaling theyre poised to raise her husbands past indiscretions. Whats your response today . Chooses. Thats up to him. Reporter in the debate, trump stayed away from bill clintons past, but nbc news has obtained a trump surrogates talking points memo, telling them to talk about clintons infidelities. Trump today in New Hampshire trying out a new attack line. Follow the money. Reporter but backstage with a reporter, pressed on the strategy of dredging up the clintons history. Why would that reflect on Hillary Clinton anyway . Well, youll have to figat simple to figure that out. Possibly in the next debate, fair game . Well see what happens. Were going to see what happens. Reporter secretary clinton with reporters dismissing it all. He can say whatever he wants to say, as we well know. Reporter meanwhile, another challenge for clinton the threat from thirdparty candidates. The gary johnson effect. Johnsons drawing support from clinton, particularly with young voters. But hes also struggled recently, faltering on Foreign Policy with msnbcs chris matthews. The country, any of the continents, name one foreign leader that you respect and look up to. Anybody. Name a foreign leader that you respect. I guess im having an aleppo moment. In the former president of mexico im giving you the whole world. I know, i know. Anybody in the world you like. Anybody. Pick any leader. The former president of mexico. Which one . Im having a brain name anybody. If johnson fades and this gaffe could help that along, thats great news for reporter as for donald trump, who has been married three times, its not clear his strategy of getting personal with the clintons will help him win over women voters, the very voters he needs more of, in order to win the white house. Lester . Kristen welker, thank you, kristin. Now to an nbc news investigation into whats being called a secret campaign to influence americas president ial race. Election systems across many states investigative correspondent Cynthia Mcfadden tells us, officials are pointing the finger right at russia. Reporter intelligence sources tell nbc news, theres no doubt the russians are trying to influence the president ial election. Nbc news has examined the classified materials used by those who briefed both Hillary Clinton and donald trump. The secret materials indicate that u. S. Intelligence has drawn direct links between the russian government and hacking activity against the 2016 election. On according to two sources at the department of homeland security, there have been attempts to hack the election systems in at least 20 states. We are doing an awful lot of work through our counterintelligence investigators to understand just what mischief is russia up to in connection with our election. Reporter nbc news has also learned from a senior u. S. Intelligence source that inside a secure Briefing Room this summer, admiral michael rogers, the director of the National Security intelligence committee, we believe potential adversaries might be leaving cyber fingerprints on our critical infrastructure, partly to convey a message that our homeland is at risk if tensions ever escalate towards military conflict. In other words, a warning from the russians. Senator Dianne Feinstein and congressman adam schiff, issued their own warnings. We have concluded that the russian intelligence ages and concerted effort to influence the u. S. Election. This effort is intended to sew doubt about the security of our election and may well be intended to influence the outcomes of the election. If were even talking about russian influence in the election, thats a problem for people accepting the credibility of the results. Reporter but even russias success in creating doubt is still a long way from changing the outcome of a president ial election. Government warning about the flu that every parent will want to know about. Also party time, the pictures of todays royal outing you wont want to were back now with a new warning from Health Officials as we stand on the brink of flu season. The cdc fears more children may get the flu because they need the vaccine shot and not the nasal spray to get the best protection this year. Nbcs dr. John torres kids. . Happy birthday to you . . Reporter for 5yearold joseph marotta, it happened so fast. A simple case of the flu quickly sent him to the hospital. And then he got worse. The attending doctor came in and i looked at her and i said, i cant hold my hand up. And i said, did he die . And she said, you need to come in the room with me. He was well loved . Yes. Reporter joseph died of a flu strain vaccine he received. That strain is now protected by this seasons shot. Get a flu shot. Reporter today the nations top officials worried about children getting vaccinated because they can no longer use the easier nasal flu mist. Everyone ages six months or older needs a shot. The flu vaccine lowers your risk by 50 to 60 . Its particularly important for the atrisk population. Those are children, pregnant patients, elderly people, and people with chronic marotta runs a group called families fighting flu, and getting their daughter emma vaccinated is a family event. We want families to understand that this can happen to you. Reporter an important reminder, last year, more than half of americans failed to get a flu shot, taking a potentially deadly risk. Dr. John torres, nbc news, syracuse, new york. We are back in a moment with a heckler who put his money where his mouth was and shocked two golf a Golden Moment at the white house today, as in olympic gold. President obama welcomed team usas olympians and paralympians to the east room, to congratulate them on their performances in rio. Most of the final five were there. Star gymnast simone biles getting to rub elbows with the first lady and swimming sensation Katie Ledecky among those getting a special little kids at a party, something every parent can relate to. Only today it was the royal family on their visit to canada. Prince george and Princess Charlotte attended a childrens party, complete with pony rides and lots of balloons, which charlotte couldnt get enough of. She was reportedly heard for the first time saying pop. The children seemed fascinated in playing with the other kids, two dozen of them from military families. And tough going today at the ryder cup during a practice round. Rory mcilroy and Henrik Stenson just couldnt sink a 12foot putt. A fan named David Johnson shouted that even he could make the shot. So they pulled him on the green, gave him a putter, and look at that, the fan showing the pros how its done, winning a hundred dollar bill and earning the admiration of some of the worlds top players. You think hes got a great story to tell . When we come back, why thousands of people just cant get enough of this scene on tv. I dont get it either, but well try to finally tonight, what has become a mustsee tv phenomenon. People around the country, even the world, are watching the live feed from a camera fixed on an intersection in so fascinating . We sent harry smith to find out. Reporter jackson hole, gateway to the tetons and yellowstone. Jawdropping vistas and an eyeful around every corner. But on any given day, go figure, hundreds, even thousands of good evening, we are starting with breaking news. A sixyearold boy on a bicycle hit by a car. It happened a short time ago. It happened in of ever heard in a Neighborhood Parks for mac the boy was flown to the hospital. We are learning to know about his condition. We go to our big story on 12 news at 6 pm. Members of the Hispanic Community are making their voices heard tonight. Protesting what they say is a broken system at the department of child safety. Several parents say that they were wrongly accused of child abuse and their children were taken away. Live outside the office on what these parents have to say. Here is Charly Edsitty that is the treatment they have received. Taking their message to the streets. They claim that the department of child safety is ripping apart families. Kids are taken away from parents and accusations of being falsely abuse. They came and destroyed with the head of thmi reporter she is a mother of three and says that they took away her children after it was discovered that her instead had several broken ribs it would not stop crying. She and her husband were accused or asked whether they had broken the ribs and they said no. Reporter she had a difficult labor and has proof that she took the child several times to local clinics. Doctors kept telling her that