Children were sleeping. And the worlds biggest cruise ship, soon headed to america. 23 pools, 20 restaurants. And the robot bartenders. We take you onboard. Good evening. It was an horrific and deadly amtrak crash in philadelphia. The train barrelling down those tracks at more than 100 miles per hour. And tonight here, an alarming portrait of what was happening with that engineer. The train rounding a curve, going more than double what it should have been. Inside the cars, hundreds injured. Passengers trying to crawl out in the dark. Eight people were killed. And tonight, investigators say the engineer was at fault, as they reveal what they say distracted him. Abcs david kerley leads us off. Reporter tonight, the newest clues about what triggered that devastating amtrak derailment, seen here in these still frame images, edited together. Heard the noise from the brake and went, were turning over. Reporter josh gotbaum was in the third car. First reaction was okay, am i dead . Reporter eight passengers were killed, 200 hurt. The engineer, brendan bostian, had a clean record, but investigators say it was human error that caused this catastrophe. He went, in a matter of seconds, from distraction to disaster. Reporter bostian, heading north out of philadelphia, hears radio calls about a commuter train being hit by a rock. Transit 1, let those personnel know. So, use caution. All units copy . Reporter investigators believe bostian lost Situational Awareness as he listened to those calls. Thinking hed passed a dangerous curve, after which the speed limit is 110. He increases speed to more than 100 miles an hour, but his train is still heading towards that same curve, with a speed limit of just 50 miles an hour. Investigators are adamant that if the Safety System ptc, positive train control, was in place, this accident would have never happened. The ntsb has been calling for ptc for 40 years. But Congress Just extended the deadline for railroads another two years. What would you tell them, after this investigation . What i would tell them is, i hope were not back in this room again, looking at another ptc preventable accident. Reporter the engineer remains on leave. A criminal investigation is continuing, and several families are suing amtrak. David . David kerley leading us off tonight. David, thank you. Tonight, there are also major new developments as travelers across this country vent their anger against the tsa. And late today, at least one senator saying the tsa chief should go if this is not fixed by memorial day. Heres what hes talking about. The images over the last several days. At Midway Airport right there. And at chicagos ohare, lines several hours long. Travelers missing flights. Officials telling passengers to arrive three hours early. Tonight, there is new action from the tsa, but we ask, is it enough . Abcs alex perez is at ohare airport. Reporter tonight, flyers are furious and fed up. Are you [ bleep ] kidding me, tsa . Reporter with epic lines and thousands of missed flights, there are calls tonight for the tsa head to resign, if he doesnt shorten lines by memorial day, in about two weeks. Theres got to be a better way. Reporter its so bad, passengers in chicago have had to sleep on those cots at times. Not the greatest. Reporter and tonight, news that 100 parttime screeners will be rushed into fulltime work by this weekend, with 250 more screeners being sent in the coming months. So, check it out. Just arriving here at ohare. The lines are already growing. Experts say, to beat the lines, avoid flying Early Morning and in the evening. The crunch is being felt around the country, all due to tighter security since the brussels attacks, with fewer Security Officers screening a surge in passengers. Since 2013, the number of tsa officers has fallen by 5,000 agents. But passenger volume has spiked over 8 , 68 million more u. S. Flyers in the air. And david, more and more airports now considering joins chicago and denver, asking passengers to show up to the airport three hours ahead of time for domestic flights. David . Going to be an ugly few weeks ahead. Alex, thank you. Millions are bracing for tornadoes and high winds tonight at this hour. In fact, seven reported tornadoes in just the past 24 hours. This one along the new mexico oklahoma border. Images of funnel clouds in florida coming in late today, as they now prepare for a dangerous night ahead. Abcs phillip mena is in san marcos, texas. Reporter tonight, funnel clouds dropping from florida skies. Powerful thunderstorms flooding streets and damaging homes. This as millions in the south brace for Severe Weather. From oklahoma to texas twisters. And huge hail. Hitting with the force of major league fastballs, cracking this stormchasers windshield. Along with all of this, days of heavy rain stranding drivers. The heavy rains have left the west side of corpus christi. Severely flooded, as you can see here on kostoryz, 18wheelers and suvs are having a hard time driving through. Reporter the area getting more than a foot of rain in 48 hours. And more on the way. Tonight, along the blanco river, residents here are watching the skies closely. Rivers and streams are already at capacity, and anymore rain could lead to flash flooding. David . Its been a rough couple of days. Phillip, thank you. And were tracking it again tonight with rob. Hey, rob. Reporter david, a couple of spots with heavy action tonight. We start with the Severe Weather threat in texas. This watch is up until 10 00 p. M. So, heavy winds and hail, but rain is going to be an issue. As phillip mentioned, saturated area. Houston, over 25 inches above average for the last 12 months. Florida today, also getting hammered. Look at these storms today. Weve had 74mileperhour winds, so, damaging winds across much of the state. And the future radar shows more action coming tonight. So, a long night ahead for them. And the overall trend over the next four to five days, very wet, from louisiana, texas, right through the midatlantic. D. C. Has seen rain nearly every day this month, and that pattern is going to continue through the rest of the week. All right, rob, our thanks again to you tonight. As much of the country braces for rain and high ones tonight, overnight, it was a passenger jet that was rocked by unexpected turbulence, so severe, the jet had to turn around to get passengers and crew emergency help. Heres abcs linsey davis. Reporter tonight, more than 130 passengers and crew are still recovering from turbulence so severe, the pilot had to turn back. There were three or four other people on the plane thatt. Reporter the southwest jet left boston at 11 00 last night for chicago. Less than an hour later, the plane hit turbulence so intense, it was forced to return to boston. Sir, we also have another medical. Can you meet ems at the crash gate . Reporter two flight attendants were taken to the hospital. Two other passengers were hurt. In just the past two weeks, more than 50 people have been injured by extreme turbulence. Eight on this jetblue flight that also spilled debris across the cabin. And 31 were injured on this flight to indonesia. But theres hope that turbulent flights could soon be reduced dramatically. New Technology Like this, cuttingedge radar software, could make it easier for pilots to spot turbulence ahead and try to avoid rough air altogether. After changing planes and flight crew, those passengers headed to chicago finally made it safely to their destination around 3 30 this morning. David . Finally. All right, linsey, thank you. Now, to the race for the white house tonight. Primaries in kentucky and oregon today. And tonight, donald trump revealing he would talk to north koreas secretive leader. That would be a major shift in u. S. Policy. As Melania Trump and what shes now saying about the clintons at her wedding. Donald trump taking aim at both clintons, but of the three of them, donald trump, Hillary Clinton and former president clinton, who is the most popular . Tonight, the numbers right here. And heres abcs cecilia vega. Reporter from Hillary Clintons allies tonight, a scathing attack on donald trump, using trumps own words. You know, you can see there was blood coming out of her eyes. Blood coming out of her wherever. Does she have a good body, no. Does she have a fat ass, absolutely. Reporter the first shot in a 130 Million Ad Campaign by a proclinton superpac. And you can tell them to go [ bleep ] themselves. Does donald trump really speak for you . Reporter trump now throwing a counterpunch at both clintons, after hillary hinted bill would have a key role in her administration. My husband, who im going to put in charge of revitalizing the economy, because, you know, he knows how to do it. Reporter trump today tweeting, crooked hillary said her husband is going to be in charge of the economy. If so, he should run, not her. But the fact is, bill clinton is more popular than his wife, and twice as popular as trump. In one recent poll, trumps favorability rating, 29 . 44 for Hillary Clinton and bill clintons . 58 . Hillary clinton battling Bernie Sanders tonight in the kentucky and oregon primaries, hopes her husband reminds voters of the economic boom of the 90s. Trump wants to remind them of a different chapter. In the history of politics, Hillary Clintons husband abused women more than any man that we know of in the history of politics, right . Reporter but the former president s strategy . For now, at least, rarely even mentioning Donald Trumps name. And, tonight, a new dig from trumps wife, melania. The clintons famously attended their wedding. But Melania Trump now saying in an interview, i dont think they sent a gift. And she goes on to defend her husband, saying, quote, hes not hitler. He wants to help america. He wants to unite people. And cecilia vega joins us now from louisville, kentucky, tonight. Cecilia, donald trump today saying hed make another major break with American Foreign policy. This time, involving north koreas mysterious leader . Reporter he did, david. He said he would be willing to meet with north Koreas Kim Jongun to try to stop that countrys nuclear program. Donald trump said, quote, i would have no problem speaking to him. There are currently two americans detained in that country right now, and as you said, a meeting with that countrys leader would mark a major shift in u. S. Policy. David . All right, indeed. Cecilia vega tonight. In a gray and wet louisville there. Cecilia, thank you. Next tonight, back here at home, to a former Police Officer who was arrested in texas years after a shooting death, while on duty in st. Louis. Shooting a suspect at point blank range. Jason stockley is charged with first degree murder now. There was a high speed chase at the time. Police say they thought they saw a drug deal. When the chase ended, stockley allegedly walked up to the car and then fired. Anthony lamar smith took five bullets through the drivers side window. Next tonight here, to a controversial move in one mississippi town. Two high schools, one predominantly black, the other mostly white. But so close, the railroad tracks, the only thing between them. A court tonight ordering the two schools to integrate, to create a more diverse student body in both schools. But not everyone is happy. Heres abcs steve osunsami. Reporter the court order sounds damning, and forces the cleveland, mississippi, School District to combine schools, creating new ones that arent so racially separate. East side high, for example, thats 100 africanamerican, would merge with cleveland high, thats predominantly white. But heres a wrinkle. The black school is the one with better scores. Take a look at a map of the town. An old Railroad Line divides it. Schools with the most white students are on this side of the tracks, schools almost entirely black are on the other. Some families worry that bussing students around will encourage more white families to leave. Bad idea, because youre trying to force kids to go to schools they dont want to go to and its going to cause people to move or go to a different school. Reporter no one is accusing Current School officials of willfully segregating children like it was 1950, but federal Officials Say theyre not doing enough to keep schools from becoming segregated on their own. Its an issue across the country. Heres a look at some of the most segregated states for black students. New york, california, illinois and maryland top the list. In a statement tonight, mississippi School Officials say they plan to appeal. David . Steve osunsami with us again tonight. We turn next here to an abc news exclusive. To the gangs right next door, across our border. And ready to send more of their members to the u. S. Theyre already here, in fact. In 46 states. Nightline anchor dan harris takes us to the tiny cells, overflowing in el salvador. Gang members who likely know many who are already here. And just look at what dan found. Reporter its the middle of the night in the murder capital of the world. Were in el salvador, on patrol with armed to the teeth cops who take us to this rundown police station, where theyre holding allegedly vicious combatants in this countrys allout gang war. As we approach the cells, the low roar abruptly extinguished. How many people are they holding in here . 169 people in here . Im not sure you can get a sense of how small this is, but this is tiny. Theyre just piled on top of each other. Theyre only supposed to be in here for 72 hours. How long have you been in . One year. Reporter one year . And now, these gangs are exporting death directly into america. Active in 46 states, because of a revolving door of illegal immigration and deportation. Here, the violence doesnt rest even for those in mourning. This grieving mother is holding a wake for her 17yearold son, alexis, murdered by gangs just last night. And right in the middle of the service gunfire. A chaotic scene. The madness in el salvador is sending a massive flow of Illegal Immigrants over the american border. Many of them kids, traveling alone, who arrive here only to be targeted for recruitment by those very same gangs. Tonight, youre going to meet one young man who was able to find a safe place for himself here, but has had to face the real threat of being sent back home. And some big news for this young man, youll see it tonight. All right, well be watching tonight. Again, dans special edition of nightline called gangland airs later tonight, 12 37 eastern, to be exact. Dan, well be watching. There is still much more ahead on world news tonight this tuesday. The horror inside one familys home. You will hear the call to 911. The wrong home had been targeted. Two teachers terrorized as their children were sleeping. Their father, trying to fight off the attackers. Theres also new fallout tonight from that major league brawl. The punishment is just in. And news tonight about the late james gandolfini. The paramedic now accused of stealing a valuable item as he lay dying. Well be right back. In a world held back by compromise, businesses need the agility to do one thing another. Only at t has the network, people, and partners to help companies be. Local global. Open secure. Because no one knows like at t. You do all this research on a perfect car, then smash it into a tree. Your Insurance Company raises your rates. Maybe you shouldve done more research on them. For drivers with accident forgiveness, Liberty Mutual wont raise your rates due to your first accident. Liberty mutual insurance. This clean was like pow. Everything well . It felt like i had just gone to the dentist. My teeth are glowing. They are so white. 6x cleaning , 6x whiteninga in the certain spots that i get very sensitive. I really notice a difference. And at two weeks superior sensitivity relief to sensodyne i actually really like the two steps step 1 cleans and relieves sensitivity, step 2 whitens. Its the whole package. No ones done this. Crest healthy, beautiful smiles for life. Next tonight, to the family in denver terrorized. Two middle school teachers, their children were sleeping. Authorities say their home had been wrongly targeted. Abcs Clayton Sandell with the mothers frantic call for help. Oh, my god. Oh, my god. Reporter the call for help is frantic. 911 . Theres three men that just came in my house and attacked my husband and i. Reporter a knock on the door in this golden, colorado, neighborhood. They knocked on my door and then they came in my house. Reporter a husband and wife, both middle school teachers, at home with their two kids last night, when three suspects break in. The husband is stabbed, but fights back, grabbing a knife, taking one suspect down. He has a cut on his arm and hes gushing blood out of his arm. Reporter police say the Home Invaders were looking for drugs and 10,000 in cash, but it was a case of mistaken identity. The bad guys had the wrong house. There were three guys. We have one of them down inside of our house. Hes been down. Baby, are you okay . Oh, my god. We have two kids downstairs in the basement. People could have certainly been killed in this situation, but obviously, this father was protecting his wife and children. Reporter tonight, the husband is in the hospital. Hes expected to be okay. The children are safe. Police say two suspects are still on the loose, david. Clayton sandell tonight. Clayton, thank you. When we come back, we have just learned of a historymaking moment for the american military. Also, the new headline tonight about the late james gandolfini. The paramedic now accused of stealing something very valuable after the actor collapsed. And coming in now, news tonight about that baseball brawl. The punishments have just been announced. Well be right back. This just got interesting. Why pause to take a pill . Or stop to find a bathroom . Cialis for daily use is approved to treat both erectile dysfunction and the urinary symptoms of bph, like needing to go frequently, day or night. 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