Now we see the alleged prank in north career ya that landed him 15 years in hard labor. The effort now to get him home. Sea change, bowing to public pressure, sea world announcing a major change tonight. And prince harry, right here this evening. Revealing to Robin Roberts the moment he was broken. Good evening. And its great to have you with us here on a thursday night. And we begin with several dropping stories at this hour. First, new claims that some of Donald Trumps personal information has now been hacked. The Trump Campaign responding at this hour. There is also new backlash tonight after Donald Trumps warning that there could be riots at the republican convention, if the party stands between him and the nomination, if theres a contested convention. Tonight, House Speaker paul ryan slamming the comments, calling them, quote, unacceptable. All of this comes after the images weve seen from trump rallies, protesters and supporters clashing. Correspondent Jonathan Karl on the backlash and on the claims that trump has now been hacked. Reporter donald trump was denounced today by Republican Leaders in washington and ohio for predicting riots if he loses the nomination this summer at the convention in believe land. I think youd have riots. I think youd have riots. Im representing a tremendous, many, many millions of people. I think you would have problems like youve never seen before. I think i think bad things would happen. I really do. I believe that. I wouldnt lead it, but i think bad things would happen. Reporter unacceptable, said speaker of the house paul ryan. Nobody should say such things, in my opinion, because, to even address or hint to violence is unacceptable. Reporter and Ohio Governor john kasich, who is both running against trump and hosting this summers convention, told abc news trumps caulk talk is dangerous. To even imply that there could be violence if he doesnt get his way, you know, hes not the wwe, hes running for president of the united states. Outrage. Reporter and today, trump is under fire from an entirely different source. Vladimir putin. The kremlin today the denouncing trumps latest attack on Hillary Clinton. This video, it spliss together footage of clinton and the russian president. Putins spokesman today accused trump of, quote, demonizing russia. It comes one day after trump said this, when asked who he consults on foreign policy. Im speaking with myself, number one, because i have a very good brain and ive said a lot of things. Reporter Hillary Clinton claims shes already getting worried calls from foreign leaders. Im having foreign leaders ask if they can endorse me to stop donald trump. I said, you know, i mean, this is up to americans, thank you very much. Reporter and tonight, another attack on trump. The Hacker Group Anonymous claims they have hacked into his his Social Security number, cell phone information and address. And zwloon karl Jonathan Karl live with us tonight. The Trump Campaign is responding to possibly being hacked . Reporter the Trump Campaign has just released a statement, saying, quote, the government and Law Enforcement authorities are seeking the arrest of the people responsible for attempting to illegally hack mr. Trumps accounts and television information. David . Jonathan karl leading us off tonight. Jon, thank you. Now, to the democratic side tonight, and to a report today in the New York Times that president obama met with donors and suggested it might be time for Bernie Sanders campaign to wind down, and for the party to unite behind Hillary Clinton. But today, the white house said, not so fast, clarifying what the president did say. Abcs cecilia vega on the campaign tonight. Reporter tonight, is a possible turning point coming in the race . The New York Times reporting president obama told a group of democratic donors it will soon be time for Bernie SandersHillary Clinton. Today, the white house denying the president was endorsing clinton, but adding, he did say this. Our success in november, in electing a democratic president will depend on the commitment and ability of the Democratic Party to come together behind our nominee. Reporter if thats Hillary Clinton, it will be full circle for two people who once battled. Although we werent able to shatter that highest, hardest Glass Ceiling this time, thanks to you, its got about 18 million cracks in it. Reporter but then, that meeting at the white house. Clinton joining his team, that moment in the situation room, and now clinton on the trail, campaigning on their close ties, helping herself, but helping his legacy, too. I think he doesnt get the taking hold. And cecilia vega with us it would seem the president has been very careful so far, not endorsing either one of these candidates, but hes offered rival. Reporter he has. Hes called her one of his most trusted advisers. And he seems to be choosing words very carefully right now. But this seems to be as close to an endorsement as you can get. Cecilia, thank you. In other news this evening, to the grilling on capitol hill today, involving the water crisis in flint, michigan. And a new list being reported tonight by usa today, as they looked into lead in the water in more than 40 states. Governor rick synder grilled by congress today. Our cameras right there with the head of the epa, under fire for allegedly not moving quickly enough, after learning of the dangers. Usa today went back four years, reporting about 350 Water Systems across america, failing tests, some of them, dozens of times. Abcs mary bruce tonight with answers again. You need to take some responsibility because you screwed up. Reporter tonight, the blame game erupting on capitol hill. What does accountability look like for you . Reporter democrating laying into michigan governor rick synder over the water crisis in flint. You were completely missing in action. Thats not leadership. Do you think . I was not missing in action, congressman. Reporter the governor acknowledging mistakes. I should have asked tougher questions, i should have done more. Reporter but for many, thats not enough. And there you are, dripping with guilt, but drawing your paycheck. Reporter i asked the governor about calls for them resign. Governor synder, will you resign . No answer, but synder not the only one under fire. Do i think the system failed . Yes. Reporter republicans blaming epa administrator for being slow to act. Im not trying to shift responsibility. Yes, you have. Reporter afterwards . Who is to blame . Who is to blame for what . For the crisis in flint . Well, the system failed. Reporter still no clear answer. Get out the way. Reporter and its not just flynt. A usa today investigation finds problematic levels in the water in schools and Day Care Centers in 42 states. One school in maine with lead levels 41 times higher than the epa limit. Those were eyeopening numbers today. Mary is on capitol hill. And mary, the tough questions up there, including from you. But you spoke with some of the families from flint who traveled to d. C. What do they make of what they heard today . Reporter david, the families we spoke with said that someone has to be held accountable. But what they want more is simply a solution to this crisis. David . Mary bruce with us live from capitol hill tonight. Mary, thank you. Now, to breaking developments, new images coming in at this hour, after the capture of a Young American, reportedly from virginia, accused now of fighting for isis. We reported earlier this week on into custody by kurdish forces. Tonight, a new video here, explaining why he left the u. S. And adding that he, quote, made a bad decision. Abcs chief Foreign Correspondent terry moran with the new video. Reporter accused by kurdish authorities of fighting for isis, the Young American, born in virginia, tells a very different story. It was all about a girl, he told kurdish tv in iraq. I made a bad decision to go with the girl, to go to mosul. Because i wasnt thinking straight. Where are you in from . United states. Reporter Mohammed Jamal kw khweis, 26 years old, captured monday by kurd ish ish peshmerga fighters near sinjar, iraq. He says he left the u. S. Last december and made his way through europe to syria, and then to mosul in iraq. But he hated it there. Its not like the western countries. You know, its very strict, it hard for everyone there. Reporter and he k has a message. My message to the American People is that the life in mosul is really, really bad. The people who control mosul dont represent the religion, isis, isil, they dont represent the religion. Reporter u. S. Officials say upwards of 250 americans have traveled to the middle east to join extremist groups. Khweis says thats not him, but he surely faces a lot of hard questions from u. S. Investigators about what exactly he was doing in isis territory. David . All right, our chief Foreign Correspondent terry moran tonight. Terry, thank you, as as. And to another headline tonight involving the fight against isis. Secretary of state john kerry today accusing isis of committing genocide against christians and other muslim groups in iraq and syria. The terror group blamed for thousands of deaths, many forced to convert to islam or be killed. Todays announcement is not expected, though, to change americas military strategy against isis. Back in this country now, and we move on to dangerous country tonight. Severe thunderstorms damaging homes and businesses in the dallas area tonight. Hail pounding away at drivers on the highway. That is from arlington. Golfballsized hails from texas all the way to florida, and of course, meteorologist rob marciano tracking it all for us. Hey, rob. Reporter thats going to be the main threat tonight is hail. Weve had reports of tornadoes, one in southern mississippi. This is the threat zone. This may be extended into the Florida Panhandle area. Several ways of convection, really, the next couple of days along the stalled front. The last wave saturday is what weve got our eye on for the northeast. Going to make a run. Mostly rain across the east coast during the day on saturday. Watch the freezing line drop down to the coastline. Several inches of snow from d. C. , the big cities, new york into boston. Could see 6 to 12 inches, heavy wet snow, especially inland from i95. This could be significant for the first day of spring. Winter is not letting go. Rob, thank you. To north korea now, and the battle to win the freedom of a the 21yearold breaking down in tears during court on wednesday. We showed you the pictures then, sentenced to 15 years of hard labor for attempting to steal a political poster from the hotel. You can see him in the video right there. Abcs chief Global Affairs correspondent Martha Raddatz tonight with the new effort under way to get him released and returned home. Reporter tonight, the u. S. Is quietly working to free american student otto warmbier. It was this security video that the North Koreans say shows warmbier stealing a political banner like this one from the hotel where he was staying with a tour group. And taking it is a crime against the state. I have made the worst mistake of my life. Reporter the 21year old uva student clearly shaken, now sentenced to 15 years of hard labor. Please save my life. Please think of my family. I am the oldest son in my family. Reporter now helping the family seek release, former governor bill richardson, college prank. Hopefully now after this sentencing, itll mean negotiations can start on his release on humanitarian grounds. Reporter close to a dozen american tourists have been arrested in north korea in the last six years, all released. The north cree yaps s koreans have, in the past, wanted a highlevel negotiator, like bill clinton, who helped free two Young American journalists in 2009. But this is a time of great tension with the North Koreans because of their nuclear and Ballistic Missile tests, and there is no telling what they will do and what they will demand. David . Martha raddatz with us tonight. Martha, thank you. Obama, and his history ba cuba. Will be back in havana, starting sunday night. The president machling one of the first direct letters to cuba in decades, sent to a cuban woman who has written him in the she has invited the president , hoping he has time for coffee. By the way, the last president to make this trip, Calvin Coolidge in 1928, with the first lady back then. And we should mention tonight that we will have an exclusive interview with president obama, during his historic visit to cuba, monday, in havana, on world news tonight. In the meantime, there is still much more this evening on world news tonight. The scary scene at a florida pep rally. The stunt gone wrong. Take a look. The firebreathing performance. Students injured when the flames suddenly get out of control. More from the scene coming up. Also, the sea change at sea world. The popular attraction revealing a major new decision tonight. And right here this evening, the Robin Roberts exclusive. Oneonone with prince harry. Moment he felt broken. Diabetes, you may know what its like to deal with high. And low blood sugar. Januvia sitagliptin is a oncedaily pill that, along with diet and exercise, helps lower blood sugar. Januvia works when your blood and works less when your blood sugar is low, because it works by enhancing your bodys own ability to lower blood sugar. Plus januvia, by itself, is not likely to cause weight gain or low blood sugar hypoglycemia . Januvia should not be used in patients with type 1 diabetes or diabetic ketoacidosis. Tell your doctor if you have a history of pancreatitis. Serious side effects can happen, including pancreatitis which may be severe and lead to death. Stop taking januvia and call your doctor right away if you have severe pain in your stomach area which may be pancreatitis. Tell your doctor right away and stop taking januvia if you have an allergic reaction that causes swelling of the face, lips, tongue, or throat, or affects your breathing or causes rash or hives. Kidney problems sometimes requiring dialysis have been reported. Some people may develop severe joint pain. Call your doctor if this happens. R using januvia with a sulfonylurea or insulin p may cause low blood sugar. To reduce the risk, your doctor may p prescribe a lower dose of the sulfonylurea or insulin. Your doctor may do blood tests before and during treatment to check your kidneys. If you have kidney problems a side effects may include upper respiratory tract infection, stuffy or runny nose, sore throat, and headache. For help lowering your blood sugar talk to your doctor about januvia. avo how much protein does your dog food have . 18 . 20 . Nutrientdense purina one true instinct with real turkey and venison has 30 protein. Support your active dogs whole body health with purina one. 80 of women say a Healthy Lifestyle is a priority. But up to 90 fall short in getting key nutrients from food alone. Lets do more. Complete multivitamin. With vitamin d and calcium to help support bone health. Were going to turn next tonight to the sudden change of course for sea world, bowing to pressure. They have announced they are now ending their popular killer whale performances, and saying they will no longer breed orcas abcs ryan smith tonight on the and why the decision was made now. Reporter the acrobatic whales were sea worlds signature attraction. But tonight, sea worlds ceo, bowing to public pressure, announcing all of its orca shows will be coming to an end by 2019 and they will no longer breed killer whales in captivity. Current orcas will be the last generation at sea world. Reporter sea world swimming in criticism for the last release of the 2013 documentary black fish and the death of dawn brancheau, killed by tillikum. Supporting the 51yearold company, one of its loudest critics, the humane society. We were enemies in a lot of ways. But we have a mutual friend that pulled us together. Reporter so, its a winwin. I believe it is. Reporter both, hoping this first step helps protect one of natures most beautiful animals. This is something that every animaled a coe vat in the nation can celebrate as progress. Reporter sea world tells us theyre replacing the orca shows with more natural whale experiences, and the 29 whales there now will stay there for their own safety. David . Ryan, thank you. When we come back here tonight, a pair of recalls this evening effects not one but two popular brands of tuna fish. Also, the concern with ecigarette ecigarettes. A new case on a flight, a delta flight, as we have details coming up. And the fire breather at a the incredible images. And the injuries, right after the breck. Ive heard it all. 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. From laxatives. 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. 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