A Violent Storm assaulted the dalathforth worth area with huge hail stones leaving vehicles looked like theyd been attacked by machine guns. Vinita nair is here with the story and the pictures. Reporter hail, ranging in size from an egg to a tennis ball, destroyed just about everything it fell on this morning here in the dallasfort worth area. In arlington, texas, the Violent Storm paralyzed the morning commute. In dallas, backyards were covered in a sheet of white. More than two dozen medstar ambulances were put out of services. Some of their windshields were punctured by baseballsized hail, others completely shattered. This greenhouse roof blown over by the storm, the fort worth zoo said the hail killed a number of exotic birds, including five flamingos. The bad weather may not be over yet. There is a 40 chance of showers and thunderstorms in dallas tonight and a 50 chance through friday. Scott. Pelley vanita, thank you. From broazen water we turn now to tainted water. The e. P. A. Says over four years, the Drinking Water in 431 american schools were found to contain unsafe levels of lead. Today, they began testing kids in newark, new jersey, after lead was found in the water at 30 schools. Anna werner is there. Reporter Tanquir Walker brought his daughters into school today for a lead testing. I think school is the first place that they should be safe in. Thats just goes to show theyre not on tom of thip game. Reporter he joined dozens of other parents concerned about elevated lead levels found in 30 newark schools this year. And the district has now revealed 12 of the water samples taken between 2012 and 2015 have also been above the federal limit of 15 parts per billion. Doctors say no level of lead is safe for children. Valerie wilson is a newark district administrator. She blames old fixtures. We have 67 schools. They average 82 years old. The Building Infrastructure needs to be replaced. That is significant. Reporter wilson says the district has been addressing lead problems in schools water since 2004, including adding water filters. But the Teachers Union released these pictures of what it says are outdated filters, some dated 2012. Union president john abeigon i believe they pushed it to the back burner because it was not on their todo list. Reporter are you comfortable that children have not been hurt by these higher lead levels . I am not a medical expert, so i cannot provide that. I dont want anybody to think the district is not concerned about that, right. But it is not a primary source of contamination for children. Reporter now, district officials tell us tonight they disagree that those filters the union photographed were outdated but could not tell us how many filters need to be replaced. Scott, the superintendent has brought in state environmental officials to work on this problem, and children here are already drinking bottled water. Pelley anna werner, thanks. Well, the water crisis in flint, michigan, boiled over on capitol hill today. More than 150 flint children have elevated levels of lead in their blood. Democrats excorrated michigans republican governor, while republican congressmen blamed presidenpresident obamas e. P. A. Administrator. Heres adriana diaz. Adriana di. Reporter the publicking was unrelenting for michigan governor rick snyder. The buck stops at your office, governor. You are not in a medically induced coma for a year. Governor snyders administration caused this horrific disaster. Disaster. Reporter it was the first time lawmakers grilled the governor about his role in flints water crisis. Snyder admitted responsibility but blamed federal oversight. An unaccountable bureaucrats at the e. P. A. Allowed this disaster to continue unnecessarily. Reporter in april 2014, flint started pumping local river water to save money, but the improperly treated water stripped lead from pipes, doubling the number of children with lead poisoning. The governor says he only learned about the contamination 18 months after the switch. Before that, he says his own water officials told him the water was safe. E. P. A. Chief Gina Mccarthy said those same state officials misled her agency, too. From day one, the state provided our Regional Office with confusing, incomplete, and absolutely incorrect information. Reporter that wasnt good enough for republican chairman jason chaffetz. You need to take some responsibility because you screwed up and you messed up 100,000 peoples lives. Reporter 72 children have tested positive for elevated lead since october. Its an improvement over last year. But Flint Residents are still angry. Snyder got to go reporter they came to the capitol by the bus load. Melissa mays had a ringside seat. She said she was frustrated by the finger pointing but is glad somebody is listening. For the longsest time we were told we didnt matter, what was happening to us didnt dnot matter. Were seeing support from across the country and i think its going to give us more energy to keep the fight going. Reporter today, democratic congressmen called on the governor to resign and republican congressmen called on the e. P. A. Chief to resign. Congress itself may be slowing down flints recovery. A 250 million funding bill has been introduced for cities with water problems but its stalled. Pelley more tauxe than action. Adriana diaz on capitol hill. Adriana, thank you. Donald trump has over half the delegates he need for the republican nomination, but today, conservatives in his own party were searching for ways to stop him. Heres Major Garrett. The fact is we have to bring our party together. Reporter as donald trump moves closer to the 1237 delegates needed to secure the nomination, republican calls for anybody but trump are growing louder and more desperate. Today, senator lindsey graham, long a bitter adversary of ted cruz, relented and backed the texas senator. So i think the best alternative to donald trump, to stop him from getting to 1237, is ted cruz. And im going to help ted in every way i can. Reporter marco rubio, who dropped out of the race tuesday, returned to capitol hill and added to the antitrump sentiment. Hopefully, theres time to still, you know, prevent a trump nomination, which i think would fracture the party and be damaging to the conservative movement. Reporter trump needs just over half the remaining delegates to win the nomination outright. Short of that majority, republicans, those running the convention and delegates, would face the first contested Convention Since 1976, a public spectacle and last chance to stop trump. Delegates are bound to a candidate only for the first floor vote. The cruz and john kasich campaigns have already begun wrangling support in the event of a second ballot. Party rules wont be finalized until the convention and could be manipulated to benefit one candidate over another by change the way delegates are allocated or recognized to vote. G. O. P. Chairman reince priebus. Those rules are drafted by the rules committee at the convention that governs the convention. We dont use the rules that are drafted for the last convention. Reporter the oncefanciful idea of a contested convention is now so real, no Interested Party can afford not to plan ahead. The r. N. C. Is recruiting rules experts. So is trump, so are his rivals. Scott, this could be the billionaire Real Estate Developers biggest artofthedeal challenge ever. Pelley Major Garrett tonight. Major, thank you. By the way, today, Illinois State police and the chicago p. D. Dropped charges against cbs News Reporter sopan deb. Deb was covering the unrest at that canceled trump really in chicago on friday when officers pushed him to the ground and arrested him. Deb was charged with resisting, but he was cleared after a review of video and interviews with the officers. Late today, Bernie Sanders conceded the close vote in tuesdays missouri primary, meaning that Hillary Clinton swept all five states. Democrats are looking ahead now to a possible trump nomination and asking themselves whether the billionaire will help them win back the senate. Republicans have a fourseat majority, but they have 24 seats up in november, and the democrats have only 10. Heres nancy cordes. Reporter arizona senator john mccain has called trumps views uninformed and dangerous. But that hasnt stopped his Democratic Senate challenger, anne kirkpatrick, from running ads like this. No matter what donald trump says, john mccain would support him for president. Reporter new york senator Chuck Schumer warned today that strategy will be replicated in dozens of races across the country. Donald trump wont make America Great again, but he will make republicans minority again. Reporter unlike mccain, many republicans have been reluctant to outright denounce trump. They fear that weakening the likely nominee will lead Republican Voters to stay home in november, hurting g. O. P. Candidates down the ballot. But today, the senates democratic leader, harry reid, said that silence is giving his party fodder, too. Some of these people are running for reelection. Rob portman, roy blunt. I just dont know how these people could run and say why im supporting this guy for president. He cant and he cant run away from it. Hes the nominee. Reporter republicans point out theyre the ones seeing record turnout in the primaries, while democratic turnout is down. But, scott, democrats insist that if trump is the nominee, their base will flock to the polls in november to vote against him. Pelley nancy, thank you. An american who joined isis and surrendered in Northern Iraq this week spoke today about his ordeal. Mohamed jamal khweis is a palestinian american from virginia. He says he joined the terror group in december and quickly figured out the lifestyle was not for him. At the time, i i made the decision to go because i wasnt thinking straight. I didnt see myself living in that environment. I would you know, i wanted to go back to to america. Pelley we dont know when he will return to the u. S. But the Justice Department is preering to file charges. Our Elizabeth Palmer was told isis is running short of money because of the u. S. Bombing campaign. Liz got a rare interview with president obamas special enjoy voi to the region which said russia may be tired of propping up the syrian dictator. Reporter for the past six years, russias government and its military have shown unwavering support for syrian president bashar alassad. But that, at last, may be changing, says brett mcgurk, the president s special envoy on iraq and syria. I think theres an emerging international consensus, and i include the russians on that, that without a very serious political transition, this conflict is going to continue to grind on and thats in nobodys interest. Reporter consensus on shutting asocalled out of syrias political future would be a breakthrough and give fresh energy to the peace talks currently under way in geneva. While on the battlefield, where an International Coalition has joined forces against isis, theres already been steady progress. A new report shows that over the past 15 months, isis has lost more than a fifth of the territory it controlled in iraq and syria. And, says mcgurk, strains are showing in other ways, too. So now, cutting salaries for their fighters by almost half. When they store money in mosul, for example, we find out where that is, and we target those sites. Reporter bomb the money. They cant pay their fighters. They cant communicate with their fighters. They cant move around the battlefield like they could before, and they cant hold territory. Reporter isis is Still Holding a huge amount of land, as well as two major cities, but if the current momentum holds, its just possible isis territory will continue to shrink as the outline of a peace deal in geneva slowly takes shape. And, scott, we may get some more details on that peace agreement, or even maybe an inkling of whats in store for president assad when secretary of state john kerry goes to moscow next week. Pelley liz palmer with the key interview tonight in Northern Iraq. Liz, thank you. And we have just learned that 12 members of the u. S. Military are to be punished for the mitaken attack on a hospital in afghanistan last october. At least 19 people were killed in a sustained air strike at the Doctors Without Borders charity hospital. David martin at the pentagon has learned that the dozen u. S. Personnel will receive administrative punishments. They will not be courtmartialed in criminal proceedings. A texas cop has been charged with murder in the death of a 16yearold. And well remember the chairman of the boards haapparent, when the cbs evening news continues. If you have postmenopausal osteoporosis and a high risk for fracture. I can tell you prolia® is proven to help protect bones from fracture. But the real proof . My doctor said prolia® helped my bones get stronger. Are your bones getting stronger do not take prolia® if you have low blood calcium, are pregnant, are allergic to it, or take xgeva®. Serious allergic reactions, such as low blood pressure; trouble breathing; throat tightness; face, lip, or tongue swelling; rash, itching or hives have happened in people taking prolia®. Tell your doctor about dental problems, as severe jaw bone problems may happen, or new or unusual pain in your hip, groin or thigh, as unusual thigh bone fractures have occurred. Prolia® can cause serious side effects, including low blood calcium, serious infections. Which could require hospitalization; skin problems; and severe bone, joint or muscle pain. Only prolia helps strengthen and protect bones with 2 shots a year. I have proof prolia® works for me. Can it work for you . Ask your doctor about prolia® today. Pelley a Police Officer in a dallas suburb is charged with murder in the shooting of a 16yearold boy. The officers lawyer says he fired in selfdefense. Heres David Begnaud. Reporter in an emotional farewell, hundreds of people said goodbye today to 16yearold jose cruz at a small church in addison. Cruz was fatally shot four days ago by offduty officer ken johnson. Johnson said he witnessed the teen and his friend burglarizing a car at this apartment complex. Sphers johnson confronted the boys, who then took off in cruzs vehicle. Johnson pursued them in his own car, ramming into the teens at this intersection. Eyewitness photos then show johnson getting out of his car and pointing a gun at the two teenagers. Moments later, he shot the two boys, killing cruz and injuring his friend. Police chief sid fuller we have policies that deal with offduty enforcement that we all follow. No. Reporter cruzs mother has been inconsolable, attending Community Vigils where hundreds of people have been protesting against the police. Cruz family spokesman Carlos Quintinilla what this officer did is he thought he had sovereign immunity. He thought he was in the wild west. He thought he was a vigilante. This is a coldblooded murderer who murdered a 16yearold, innocent young man. Reporter heres where it happened. Thats the intersection where the officer rammed the vehicle, and i am standing in the spot where the shots were fired. Scott, that officer who was charged with murder, that arrest happened yesterday, but by this morning, he had posted a 150,000 bail and walked out of jail. Pelley David Begnaud tonight. David, thank you. There are big changes coming at seaworld, and well have them next. The roles you play in life are part of what make you, you. And youre not going to let anything keep you sidelined. Thats why you drink ensure with nutritious calories, 9 grams of protein and 26 vitamins and minerals. Come on grandma giving you the strength and energy to get back to doing. What you love. From the 1 doctr recommended bran. Ensure. Always stay you. I thought i neededuggled cigarettes to cope. I was able to quit smoking. And then i started running. Now, i feel a lot better. announcer you can quit. For free help, call 1800quitnow. Ive been blind since birth. I go through periods where its hard to sleep at night, and stay awake during the day. Learn about non24 by calling 8448442424. Or visit my24info. Com. At safelite,oh nonow how busy your life can be. This mom didnt have time to worry about a cracked windshield. So she scheduled at safelite. Com and with safelites exclusive on my way text she knew exactly when id be there. So she didnt miss a single shot. cheering crowd i replaced her windshield. Giving her more time for what matters most. Howd ya do . We won nice thats another safelite advantage. Thank you so much team sing safelite repair, safelite replace. Ive heard it all. Eat more fiber. Flax seeds. Yogurt. Get moving. Keep moving. I know try laxatives. Been there, done that. My chronic constipation keeps coming back. I know. Tell me something i dont know. Vo linzess works differently from laxatives. Linzess treats adults with ibs with constipation or chronic constipation. It can help relieve your belly pain, and lets you have more frequent and complete bowel movements that are easier to pass. Do not give linzess to children under six and it should not be given to children six to seventeen. It may harm them. Dont take linzess if you have a bowel blockage. Get immediate help if you develop unusual or severe stomach pain, especially with bloody or black stools. The most common side effect is diarrhea sometimes severe. If its severe stop taking linzess and call your doctor right away. Other side effects include gas, stomacharea pain and swelling. Talk to your doctor about managing your symptoms proactively with linzess. Pelley today, seaworld said it will phase out its killer whale shows, giving in to pressure from Animal Rights activists. Heres ben tracy. Reporter seaworld is ending the shows that made shamu a houps hold name. The company will also no longer breed its captive orcas. Seaworld c. E. O. Joel manby on cbs this morning. So this will be the last generation of orcas at seaworld. Obviously, thats a very difficult decision for us, but we feel its the right one for the future of the organization. Reporter seaworld still holds 23 orcas in captivity at its three parks in san diego, san antonio, and orlando. The highly critical 2013 documentary black fish was the beginning of the end for seaworlds killer whale shows. It chronicled attacks on seaworld trainers such as dawn brancheau, who was killed by a massive orcas in 2010. Attendance has been falling at the parks, along with seaworlds stock price. The company is now entering into a 50 Million Partnership with the humane partnership, the onetime adversary. C. E. O. Wayne pacelle. Were hoping to partner with them to help with animals in distress stranded whales, stranded dolphins, stranded sea turtles. Reporter seaworld was running out of options. The California Coastal commission ruled it could not expand its San Diego Park unless it ended orca briefing. California congressman adam schiff said seaworld does dnot suddenly see the light. I think it is mostly a decision based on the fact that people were not showing up at the parks. People did not approve of the continued captivity of these whales. They didnt approve of how they were being exhibited. Reporter now, the orcas will still be on display at seaworld parks, such as this one here in san diego, but in what the Company Calls more natural orca encounters. Scott, seaworld made a lot of money selling orcas to theme parks around the world, something say they say wont do anymore. Pelley ben, thanks. Sistine chapel has died. The chairman of the boards son became a singer. At 19 he was kidnapped and returned after his father paid the ransom. He went on to become the keeper of his fathers flame. Frank sinatra jr. Died of a heart attack yesterday. He was 72. And well be right back. 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Reporter the group rehearses its celebrations before games, playing off current events, pop culture star wars. Reporter and sometimes a little bit of history. During their victory in december over basketball powerhouse georgetown, they unveiled what they called the sistine chapel. Look at that. Thats the sistine chapel. Thats my favorite one. Reporter what do your teammates say about it . They love it . Reporter do you feel like it helps them . Absolutely. If they look over at the bench and see were in the game and were energized and trying to feed energy to them. Theyll be like, if theyre in it, how can i not be in it. Reporter Basketball Teams across the country have picked up on their antics. High school teams and even n. B. A. Players have copied their celebrations. Coach king rice. I really preach having fun, especially to my guys. You should have fun when youre doing what you love. Reporter doing what they love while changing attitudes about riding the pine. Elaine quijano, cbs news, west long branch, new jersey. Pelley and the tournaments next right here. Thats the cbs evening news for champions of the world, denver broncos. And its caught for the win one of the epic performances. Jason day, major champion. Derrick henry will win it, national champions. Magnificent the ball is tipped and there you are youre running for your life youre a shooting star one shining moment is all on the line. One shining moment frozen in time im not a