On camera. And tonight, trump fires back. Images coming in from the scene tonight. A Police Officer shot and a young father, less than three years on the job. A second officer wounded under fire while serving a warrant. And as spring arrives, the winter storm warnings for millions as we come on the air tonight. Up to eight inches of snow in some places. Good evening tonight from havana, cuba, where history has jusy been made. President obama touching down, landing in havana, the first president to visit cuba since Calvin Coolidge in 1928. While were here, we will have an exclusive interview with president obama, and he will meet privately with the cuban in a televised speech. The first family is here. The cuban people are welcoming them with open arms. As many ask back home, how far will be president go with what he says, about a communist government and human rights . And about the freedoms of ordinary cubans . President obama landing here in cuba late today making history. Just 90 miles from the u. S. He is the first president to visit cuba in 88 years. It comes a little more than a year after the president announced the u. S. Would begin normalizing relations with cuba, a thaw decades after the cold war ended. When we sat down with the president the first time we asked him if this day was coming. Will you visit cuba in your final two years as president . You know, i dont have any current plans to visit cuba. Reporter not ruling it out . Well, lets see how things evolve. Reporter after that first interview, we brought you to cuba. Driving to find the former u. S. Embassy here, stripped of its title and shut down after fidel castro took power. The growing tensions, lining up before the embassy could close to apply for american visas, the wait list months long. But outside the old embassy this past year, we witnessed the first signs of the thaw. You can see the heavy security behind me, the officers on the corner here. We were here as members of the u. S. Delegation arrived a short time ago, because there is great hope that this will soon become the u. S. Embassy again. And tonight, the embassy is now open again, and on his first night here, it will be among president obamas first stops. 11 Million People live here in cuba, on average making just 20 a month. By some estimates, just 5 have Internet Access in their homes. And tonight, the people here are waiting for the american president. Here in the heart of old havana, you talk to the young families here, and hear the same thing over and over. Its time. I ask yvette, 24, what she thinks of the president s visit. She tells us we dont know exactly what will happen but i hope there is something good and families can be reunited. And this young father, andy, telling us its good that cuba and the u. S. Can now get along. And reveals he has family he would love to visit in louisiana. The president will make an historic speech televised to the cuban people. And inside this merceria, a tiny store, i ask, will they be watching . And what if president obama offers tough words about what change must come. [ speaking Foreign Language ] of course, she says. Shell be listening. And were prepared for anything the president has to say. On the streets here, scenes frozen in time. The american cars from the 1950s. The road to havana paved with glory for fidel castro. Reporter when fidel castro took power in 1959, he shut down imports of american cars. 60,000 vintage cars still driven here. In slow motion for decades, still controlled by a communist government. And there are still arrests. Dissidents who speak out about their own government. President obama, aware of criticism from some back home, that the embargo should not be lifted. And we will ask him about that while here. But already, more americans are now visiting cuba. For cultural exchanges, simply coming for tourism is not yet allowed. Flights from america will soon resume. There is a bidding war among airlines already. And tonight, Starwood Hotels and resorts just announcing they will renovate and operate three hotels here. The monte carlo of the americas. Reporter more than half a century ago, cuba was a tourist mecca for americans. The nightclubs, the gambling. But now its president obamas gamble. Will restoring relations, and pushing for a more open economy, actually give cubans a new voice . As Many Americans back home wait to visit as tourists again, to see the culture frozen in time, and those american cars. We asked, with no American Parts fixes them and how . Mechanics who improvise. A 53 plymouth. In that car, now a mercedes engine. And we wondered how much of the car is original. [ speaking Foreign Language ] he answers with a smile, just the body and the transmission. Rebuilding it all on their own. As an american president now arrives, many ask what will change here. And how far will he go in private with president castro and in public, before the cuban people. The president has already acknowledged that the embargo will likely not be lifted in cuba until the next president. And well ask about some of the criticism back home, that it shouldnt be lifted at all. Our exclusive interview with the president tomorrow night. Our first moments with the president first thing in the morning on Good Morning America. Well be back from cuba a little bit later, with a letter arriving from the president before he arrived, and a message he sent about a cup of cuban coffee. But first, lets go back to new york and tom llamas. Tom, good evening. David, thank you, and good evening to you. Back here at home and the race for president. Donald trump defending his Campaign Workers and supporters. After more violence erupts inside one of his rallies. A protester punched and kicked by a trump supporter as they were being escorted out on saturday night. Trumps Campaign Manager again accused of a physical confrontation. This time, with another protester. Heres mary bruce. Reporter its the most violent confrontation yet. A protester at this trump rally in tucson escorted out when a trump supporter suckerpunches him, pulls him to the ground, and repeatedly kicks him. The supporter, arrested. Seeming to blame the man who was hit. These people are very disruptive people, george. These are not innocent lambs. But does that excuse punching and kicking a protester . Well, you know, he or his partner was wearing a ku klux klan outfit. This happened to be an africanamerican man who was very, very incensed to the fact that somebody, a protester, would be wearing a ku klux klan outfit. Reporter fact is, the man who was punched was wearing a stars and stripes shirt. Still, trump on this week says protesters share responsibility for the unrest. At what point do people blame the protesters . These are people that are professional agitators. So, youre blaming the protesters, not the person who actually punched and kicked the protester . No, im saying this, these are professional agitators and they should be blamed there, too. Reporter trump also defending his Campaign Manager, corey lewandowski, after grabbing a protester by the collar. Watch again. Lewandowski in the grey suit. I give him credit for having spirit. He wanted them to take down those horrible profanitylaced signs. Reporter this is the second he also allegedly grabbed a female reporter. But trump standing by his Campaign Manager, bringing lewandowski onstage at his last victory celebration. Now, trump was pressed today about his prediction that his supporters will riot if he doesnt win the nomination. Trump says hell tell them not to, but suggests it could happen anyway, saying theyre, fervent. Tom . Mary, thank you. Now to the spring storm and the winter blast. Snow and ice covering roads in illinois on this first day of spring. To the east, Winter Weather alerts from new jersey to maine. Snow arriving overnight, making a mess for the morning commute. Heres rob marciano. Tracking it all from boston tonight. Rob . Reporter a mild winter, but now spring brings a snowstorm. Definitely cold enough for it here. Snow across the south, it will change over into new york, new jersey, connecticut. By midnight, it will be heaviest. Heaviest by 7 00 a. M. In boston, 5 to 8 inches of heavy, wet snow expected. Well probably see Power Outages outages, definitely a difficult commute. A significant storm. Tom . Rob, thank you. Now to breaking news about a shootout in indiana that left a Police Officer dead. The 27yearold deputy killed. That officer, a new father, less than three years on the force. A second deputy shot and wounded. Gio benitez with the new details tonight. We got two officers down. We need somebody. Reporter youre listening to the moment two indiana deputies serving a warrant ended up in a gun battle. Fired, county we got shots fired. Ive been hit. Reporter early this morning, around 12 30 a. M. 27yearold Deputy Carl Koontz buckley, coming face to face with a gunman when they went into a house. The deputies returning gunfire, but it was too late. Koontz, less than three years on the force, dying from those wounds. Buckley is still recovering. They got inside the residence and they were met with gunfire. We plan for it, but youre never fully prepared for it, if it is truly unknown to us. Reporter the alleged suspect is dead tonight. His identity has not been released. And tom, tonight, we dont know exactly what the warrant was for. But were told it has something to do with drugs. And one officer has lost his life because of it. Tom . Gio, thank you. Now overseas to a stunning revelation about the capture of the terrorist Authorities Say was responsible for the paris attacks. Authorities say Salah Abdeslam was planning to launch another one in november. According to police, he was not acting alone. Alex marquardt in brussels tonight. Reporter tonight the lone surviving terrorist of the paris disturbing details to interrogators. Admitting, according to belgiums foreign minister, that he was planning more attacks. The claim backed up by the large weapons cache found in a raid on the minister also saying abdeslam clearly had a Strong Support Network helping him but his lawyer told a belgian newspaper that after the arrest, abdeslam is frightened and weak. European officials have warned that the threat of more attacks is as high, or higher, than before paris. The question now, what more can abdeslam reveal . This gives the belgian and the french authorities the opportunity to interrogate him, find out more about who else he may have been working with. Find out more about how he carried out these attacks and the connections back to the islamic state. Reporter abdeslam is now be taking legal action against the paris prosecutor for revealing details about the abdeslam is due to make his wednesday. Thank you. Next tonight, the investigation into the plane crash in russia, killing all 62 onboard. The plane, trying to land in heavy winds when it crashed on to the runway. How difficult this investigation may be. Heres david kerley. Reporter investigators are tonight analyzing the two black boxes recovered from flight 981. The devices are badly battered but tonight the russians report they have started to uncover data that may reveal why it plunged to the ground. And tonight, unconfirmed recordings posted on the internet purporting to be the tower talking to the pilot. Asking air Traffic Control about weather conditions, circling the area for two hours. Look out windows there, it looks better than before. 9er81, moderately. It almost looks like the pilot was visually trying to acquire the airport and was looking out the window, rather than relying on instruments. Reporter plane maker boeing, along with experts from the u. S. Government, will aid the russians trying to learn why this jet crashed. David kerley, abc news, washington. And still ahead tonight, a mystery illness now in two states. And the death toll is climbing. And, what forced this school bus to plunge into a ditch . The dramatic rescue to save passengers. And later, no privacy in this famous nest. Millions watching. The new Reality Stars of the internet. Ry ellen, and i quit smoking with chantix. I always came back to smoking. I was absolutely frustrated, i did not think chantix would work as well as it did. Along with support, Chantix Varenicline is proven to help people quit smoking. Chantix reduced my urge to smoke. 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Reporter this video recorded by another driver, capturing the chaos as students scramble to escape the mangled bus. Weve got parents and cars all over the place. Reporter the griffith panthers on their way to a playoff game when Indiana State Police say a driver spilled a drink on herself, sideswiping the bus. When the bus finally slowed down and stopped flipping everybody was screaming. Reporter all 27 passengers rushed to the hospital, including an assistant coach airlifted to chicago. There were no seatbelts on that issue. Look at this rollover crash, simulated by one of the largest providers of School Bus Seat belts. Kids who arent buckled in go flying. Right now only six states require seat belts, but the national Highway Traffic Safety Administration wants to change that. Tom, the biggest hurdle, the cost. The government estimates it would take 2. 5 billion to make sure every child is buckled up. Tom . Eva, thank you. When we come back, the close call on a golf course. 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Our index, now, starting with that deadly mystery infection known as the death of an elderly man linked to the rare bacteria, usually found in water. So far sickening at least 55 people, 18 have died. The majority of the patients over the age of 65. Now to the teen pilot making an emergency landing. The small plane nosediving on to a golf course after the engine stalled. The pilot and passenger were not seriously injured. The young pilot getting praised for landing in the open space, away from nearby homes. An update on the famous feathered family. So many of you have been watch watching on a live stream. Now, the new chick has a second sibling, hatched this morning as millions watched on the live stream. The family here at feeding time today. The public may get to vote on what to name them. When we come back, david takes us back to havana. President obamas historic visit seen. The letter he sent before leaving, a message about a cup of coffee. Say with us. Doing something simple. 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Which helps you feel more energized. All day long. I want what he has. And finally tonight, from cuba, the historic visit already under way. The first images coming in. President obama making history here, the First American president in decades to see havana with his own eyes. We ask, how much of cuba has was here in 1928 . And tonight, the letter president obama sent to cuba before he even arrived. This moment, 88 years in the making, once unthinkable. The first family in cuba tonight. Air force one landing here in havana. A much different entrance last time. President Calvin Coolidge, sailing into havana on a battleship. The only other sitting u. S. President to visit here. It was 1928. His wife, grace, arm in arm with the cuban president. The cheering crowds, leaning from balconies, welcoming president coolidge. A reporter, writing for the New York Times back then saying, his face was full of smiles. The streets, then and now, with cuban and american flags. And tonight, president obama, seen smiling too. The president sent a letter to cuba this past week, one of the first direct letters to arrive here in decades. The president writing to a cuban woman. Ileana yarza, who has written the president before, sharing her happiness at the president taking this much needed step. Her havana home. The u. S. cuba direct stamp in the corner. The president writing back, hopefully, i will have time to enjoy a cup of cuban coffee. The hope of this visit on so many faces today. Even on a playground, aware of the history. We have not forgotten the children here. The soccer game beyond the fence. Robin, telling me, it will be great. We are going to have a better economic situation. And i asked them if diplomatic ties with the u. S. Is a good idea. [ speaking Foreign Language ] si. Si. Reporter the children, raising their hands to the future. And thats world news tonight from cuba. Thank you for watching. Much more of our coverage of this historic visit tomorrow morning on Good Morning America and right here on world news tonight. Our exclusive interview with the president , tomorrow night. For tom llamas back in new york im david muir here in havana, cuba. I hope to see you right back here tomorrow night. S big, bold, steaks. Our new 10 ounce filet. Our 16 ounce tbone. And our fire grilled 18 ounce outlaw ribeye. Only at longhorn steakhouse. If your family outing is magical for all the wrong reasons. You may be muddling through allergies. Try zyrtec for powerful allergy relief. And zyrtec is different than claritin. Because it starts working faster on the first day you take it. Try zyrtec. Muddle no more. Ribeiro heres a sneak peek at tonights afv. We know youre gonna love it. Oh [ laughs ] [ horn honks ] [ highpitched scream ] [ blows raspberry ] [ laughs ] woman oh welcome to. And now, here he is, the host of our show, alfonso ribeiro