shelling is already under way. five people have died in renewed rocket and artillery attacks against kharkiv. today, of course a holy day in ukraine. russian shelling hit this church. and we are also gaining new insight into vladimir putin's state of mind. the russian president is, in his own world, and is believed to be thinking that she winning this war. that's according to the austrian chancellor who met with putin face to face, and in an exclusive interview with cnn's jake tapper, ukraine's president says the entire world should be concerned about what putin may be capable of. >> the director of the cia warned that he's worried putin might use a tactical nuclear weapon in this fight. are you worried? >> not only me. i think all of the world, all the countries, have to be worried, because, you know, that, it cannot be real information, but it can be the truth, true, because when they begin to speak about one or another battles, or involve enemies or nuclear weapons or some chemical, you know, issues, chemical weapons, they should do, they could do -- i mean, for them, they can. life for them, that's nothing. with truth think, not be afraid. i mean, don't be afraid. be ready, but -- but that is not a question to ukraine, and not only for ukraine. for all the world, i think so. >> translator: there is a possibility of them using these weapons. nobody expected there to be a full-scale invasion of ukraine from the russian federation. no one expected there to be a war in 2014. now that there will be a full-scale invasion, killing of civilians, noble expected them to invade areas where there are no military equipment and kill and shoot dead a civilian population. nobody expected that, but this is a fact. and it happened. and that is when russia gives information and says, if something goes not according to plan, they can use chemical weapons, and then nuclear potential. and that is why i believe these are dangerous claims of uninterest worthy people, and if we believe some are already untrustworthy then they can use nuclear weapons. >> dangerous indeed. putin's war left deep scars for many families including that of a 12-year-old girl who could be sent to a russian orphanage after her dad was killed. cnn's phil black joins us from kharkiv. you spoke with this girl's grandfather. is there any chance they could be reunited? >> reporter: paula, here's the context. the ukraine government says tens of thousands of people have been forcibly sent into russian-controlled territory. these are civilians caught up in fighting and say it includes thousands of children. russia doesn't dispute it is moving vast numbers of people. it says there's nothing forced about it. it's just helping those who want to be helped. this story strongly suggests otherwise. it is the story of a young girl who has been taken by russian forces beyond the reach of her remaining family, and they fear they will never see her again. it's almost hard to comprehend. this was mariupol not long ago when its people knew safety and happiness. the girlin pink is keira. joyful, loved, 12 years old. this is keira after the russians came. orphaned, injured, alone in a russian-controlled hospital. russian media released this video showing keira in donetsk, capital of a moscow-backed separatist region in ukraine's east showing her telling some of her story. why she fled mariupol. krns there was a lot of shooting, she says. our building was hit. so was her father. yevgeny, a former captain of ukraine's national water polo team shot from a distance and killed as russian forces fought their way into mariupol march 17. days later, her father's girlfriend tried to flee the city on foot but someone stepped on a mine and keira was injured in the blast. russian soldiers then took her to donetsk. >> the russian military which killed your son, now has your granddaughter? >> translator: keira's grandfather, alexander, tells me her mother died as a baby. now she's watched her father die. she misses her remaining family and she wants to return to him. >> reporter: xa xander alexandes scared he may never see her again. she wants to travel there to claim her nap is impossible, because of the war. when alexander spoke to the hospital he was told keira when eventually be sent to an orphanage in russia. they took her documents, he says, and says they'll provide new ones when they send her into russia. the russian government said it helped moved at least 60,000 ukraine people to safety a cross the russian border. the ukraine government said around 40,000 relocated against their will describing it as abduction and forced deportation. the russian media video shows keira talking to happily about how she sometimes is allowed to call her grandfather. >> translator: i called him today, she says. i'll also call him in the evening. russian tv called the video proof keira wasn't abducted. proof of yet another ukraine fake. keira also sometimes sends her grandfather audio messages. like this one. she first tells him not to cry, but she can't stop her own tears. i haven't seen you for so long. i want to cry, she says. the voice of a young girl who has lost her family, her home, her freedom, all to russia's war. >> reporter: just today a senior ukrainian official in the east of the country said that ukrainian citizens are being deported into russia and sent to remote russian towns and villages to help meet the need for cheap labor in these places. we can't confirm that specific allegation, but a separate cnn investigation into deportations spoke to ten people, ten other people, who all told very similar stories. once they fell behind russian lines they weren't given any choice. told to move or deliberately moved into russian-controlled territory. five of them then moved into the russian federation itself. keira's family hopes that through publicity, through international awareness of her case, the same fate can be prevented for this 12-year-old girl. paula? >> hmm. phil black. incredible reporting. thank you so much for that. and the dire humanitarian situation in ukraine continues to worsen. more than 4.8 million people fled the country since the war began. and for those still in ukraine, many of struggling to get everyday essentials and volunteers are trying to help out. working to get people food, and water, clothing and other necessities in the war-torn country. joining me now is professional dancer and dancing with the stars alum max. you were, of course, in ukraine for work when the war broke out. you were trapped there. tell us a little what it was like trying to get out of the country? >> well, thanks for having me. but, yeah. i was shooting a tv show. i was, i'm a judge on "dancing with the stars" in ukraine. at work, and also shooting "world of dance" when the war started, and i found myself in a hotel. smack in the middle of kyiv. luckily for me the hotel became a little bit of, like a switzerland if you will, because it hosted all kinds of international news media teams, and i felt safe at the moment, but about a week later, i realized that i was in probably the least safest place, because i was blocks away from zelenskyy and the government, and i felt like that's where russian forces were going to. so it got really scary. >> i can imagine. of course, your parents immigrated to the u.s. from ukraine. what was it like when they found out that you were stuck in ukraine as the war was breaking out? >> well, i mean, the crazy irony of this situation is that in 1994, my family, my dad, my mom and myself, i was 14 and my brother, he was 8. we immigrated to the u.s., and we did so for many reasons. a few of which, biggest ones, my mom and my dad were worried about the mandatory army that ussr where i was born in 1980, afterwards the situation constant conflict this region was involved in, and it felt like my parents were saving me from possibility of that kind of fate. and the irony is that 20 years, 28-plus years later i end up in ukraine where we left during a conflict, the war that my mom and dad were trying to escape from, and so it was very crazy. it affected my family very, in the ways that we didn't expect. it -- it forced the situation with, you know, everyone around us to try and help. we kind of, like, stepped in to the area we weren't familiar with, but the, my organization was born through the efforts of my family, my dad, my brother, and hundreds of volunteers that stepped up. and so six weeks later, we are actively continuing humanitarian aid collection and delivery into ukraine, and up to now, you know, between shipment and air we've sent about 230,000 tons humanitarian aid. doing our best to do our part. that's how this affected us. >> so your family started this organization to help out ukrainians. i understand your father's in poland right now. what are you hearing from him on the ground? >> my father actually just flew back last night, but he spent time in poland, same place where i went to, right after i kcame out of ukraine. continuing to work to help even more. we are working on a project that is, you know, something we're going to focus on moving forward which is beginning of the settlement. trying to build a settlement in ukraine. in western ukraine. for people that have migrated, relocated which is most if not all of the country. a lot of people are not sure, you know? a lot of people have no idea where to go. just because they cross the border from ukraine doesn't mean that they're safe. doesn't mean that this is the most ideal situation. so we're trying to figure out a way to build mobile homes quite fast in the place remote and sort of safe. there's such a thing at this point. but allowing people to stay in ukraine and create these settlements. >> and even though the future is obviously incredibly uncertain what are you hoping the future of the organization holds? for example, would you go back to ukraine at any point? >> soon as the war is over, i think that everybody's going to want to be back, and i will definitely be one of the first. i would -- like i said. for me the war has faces and names. a lot of my friends. a lot of people that i've reconnected with and met anew over the last year or so that i've been actively back and forth with ukraine, and so a lot of friends of mine. i'm going to give you quick example. i was judging a dance competition when the war started and a couple days later the people i judged at dance, that presented themselves to me as dancers were holding weapons and on the front lines. for me it was a very crazy realization, and today we understand that it's a long period. it's not going to end tomorrow. and i just want to say that me, my family, we're in this for the long haul, as long as ukrainians are in the fight and need help, we are here to help. i just want to take a second to thank hundreds of volunteers that came to us in new jersey and helped out every single day. every single day, seven day as week people come help us. i just want to say that that's appreciated beyond words. >> certainly. if you could speak directly to russian president vladimir putin what would you tell him? based on your experience in ukraine? this important work you're doing with refugees. what would you say to him? >> i think that history changes, and i think that the plan, which is so basic and historically has been the same plan of hitler and napoleon and whoever else that wants to occupy and, you know, own territory, globally. history changes. today the warfare isn't the same as it used to be, and, you know, the fact we're seeing this with ukraine defending what was meant to be one of the biggest armys in the world. i just want to say that maybe historically history needs changed, and in this war, there's not a victory or loss but maybe he just needs to step down. you know? and i would love to see a historic event where someone like putin makes a different historical choice than his predecessors like hitler, that didn't end well. these are not fighting words. this is just me being human realizing that you can't achieve peace through what's happening in mariupol, and the nation of ukrainians, the ukrainian person today is going to carry the hate and the animosity towards the russian person for generations. i don't think anybody wins in that situation. i just wanted the fight to be over and for the peace to start so that me and my family can lead the way amongst others to rebuild this country. >> a sentiment shared by many. max, thank you so much for joining us and sharing your important work. >> appreciate it. and up next, as the u.s. sends aid to ukraine, there is concern that ukrainian forces may run out of ammunition as russia shifts its military strategy to heavy ground combat in the comes days. you're live in the "cnn you're live in the "cnn newsroom." llection is infused with hyhyaluronic and peptide serums to make e your skin feel smoother and more radiant. new dove body love. facece care ingredients now in the shower. pre-rinsing your dishes? 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>> reporter: paula, the white house is constantly evaluating what ukraine needs as they continue to fight this war against russia, and what you have seen this week over the course of this weekend, really. the first shipments have started to arrive of that new $800 million worth of they'd president biden approved earlier in the week. this includes much more sophisticated and heavy-duty weaponry than the u.s. previously been supplying to ukraine. those things that you mention. like the howitzers, switch blade drones and radar systems capable of detecting incoming fire and pinpointing their origin. now, these, the white house and the biden administration have said they tailored this request specifically to what the ukrainians have asked for, but a u.s. official did say there were concerns about the inventory of ammunition that ukrainians have. one official said that those howitzer and that 40,000 artillery rounds heading to ukraine over the course of the next few days, that that could be used up in a matter of days. it was expected there would be more heavy combat between russians and ukrainians in the eastern part of the country. so the u.s. is still evaluating what more it could possible offer to ukraine at this moment. ukrainian president zelenskyy today welcomes this $800 billion of security but insisted more is still needed at this moment, and even told our jake tapper it will never be enough. just as this military assistance is arriving is there a sense the white house is thinking about the next round of aid? especially because they seemedals reluctant to send this first round initially? >> reporter: really, the white house is constantly evaluating what the ukrainians need as the battle continues to evolve. one thing the pentagon is also doing is holding daily call wis cou allies and urging them to send more equipment into ukraine. for the time being haven't outlined what more equipment might be sent there, but that is something that is always on the table as they are further trying to assist the ukrainians in their fight against russia. now, russia has protested the u.s. sending more supplies into ukraine. recently sending a diplomatic note to the state department warning of unpredictable consequences if the u.s. continues with more aid, but so far the u.s. really has remained undeterred in providing this aid for ukraine. so we will see as the battles in the east are expected to intensify whether the u.s. might be sending more weaponry in. especially as there are concerns about that ammunition. >> arlette saenz, thank you for that reporting. and retire d brigadier general joins me. former secretary of state for military affairs. general, we see turn-around time on the u.s. military getting approval and then getting these materiels into the hands of ukrainian troops. cut down to just days. looks like that still may not be fast enough. is there anything that the u.s. can still do to expedite this process any further? >> well, i think the answer was already given by the white house, which is let's go to our nato allies. 40,000 rounds of ammunition are only good for u.s. weapon systems. our nato allies not only have u.s. weapons system, but also old russian weapons systems as well. majority of artillery inside uc zuck russian. using a different ammo. this is the time nato should be pumping as much military artillery as possible. >> and first time going to be new, like you said. how much time do ukraine forces need to get acclimated to new systems? clearly not something that happens in a matter of minutes or hours? >> that's true. i think that's why we have been very careful what we send. sbich blades are fairly user friendly. artillery is what they already have. trucks and armored personnel carriers and helicopters are very easy for them to operate. they're old russian helicopters. it's those other pieces of equipment that we haven't sent because of political decisions like, perhaps, patriot missiles, and other jet fighters, where we ought to be pulling ukrainian officers out of country now and training them in anticipation of a decision being made to bring them in. >> the city of mariupol refused a russian surrender ultimatum. so looking at the full context of what's going on here, what would be the impact? the impact of the loss of that port city for ukraine? >> well, first of all it would be a victory for vladimir putin. more importantly, it would allow russia to connect russia down directly to the crimea over the land and over the sea. i think the bravery and hero imof the ukrainians demonstrates that the unintended consequence is, this is going to be a, remember the alamo moment for the ukrainian forces outside of mariupol. the bravery shown by these defenders in the long fight is simply going to inspire the ukrainians to fight the russians harder. so the russians may get mariupol, but they're going to pay in blood and treasure as i suspect in their next battle the ukrainians are going to be screaming, remember mariupol. >> president zelenskyy says the world needs to be ready for putin to use nuclear weapons, but many experts say this is going to likely look a lot different than what many people envisioned when they think of nuclear conflict. they think of the cold war. so how exactly do you see this potentially playing out? if poot wutin were to take that? >> first of all, i think there's a slim possibility that he will do that, but i suspect in the low probability he did yoon practical nuclear weapons with a small yield, attacking logistical depots or perhaps command centers, even perhaps the capital of kyiv. they don't really have a lot of military value these days. they're meant as a terror weapon. they can easily replicate of effect of that artillery round they would use with other artillery, other missiles. so if he does that, the low chance he will, but if he does, it's meant to be a weapon of terror. not a weapon of military utility. >> i take your point. that putin can get what he wants without resorting to nukes or chemical weapons, but in your mind in your assessment, is he still a rational actor? or is everything really truly still on the table? >> oh i don't see any reason right now to suggest he is not a rational actor. we are horrified at the way the russians are fighting this war. their brutality. their callousness. they're shooting of incident civilians. but they've been doing it for years. they've done this in chechnya, in aleppo. this is the russian way of war and in vladimir putin of mind and the new general dvornikov's mind, this is the way they're going to fight this. >> thank you so much. a quick programming note. the unbelievable true story of the man who took on putin and lived to expose the truth. the sundance award-winning cnn film "navalny" airs next sunday right here on cnn. coming up, cnn goes inside the besieged city of mariupol as officials there reject a russian surrender ultimatum. you're live in the "cnn newsroom." neuriva plus fuelsls six key indicators of brain performance. more brain performance? 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>> move more aggressively to concher kharkiv, for example, already launching shellings almost every single day and move more forces towards odesa. >> reporter: for mow mariuch stl has not fallen. destruction litters the landscape and ukraine's remaining forces declined to surrender sunday, russia with a chilling response. its defense ministry saying in part "in case of further resistance, all of them will be eliminated." matt rivers, cnn, lviv, ukraine. up next, an update on the americans currently detained in russia. yoyou're live in the "cnn newsroom." ♪ we believe therere's an innovator in all of us. ♪ that's why we build technology that makes it possible for every business... and every person... to come to the table and do more incredible things. if your moderate to severe crohn's disease or ulcerative colitis symptoms are stopping you in your tracks... choose stelara® from the start... and move toward relief after the first dose... with injections every two months. stelara® may increase your risk of infections, some serious, and cancer. before treatment, get tested for tb. tell your doctor if you have an infection, flu-like symptoms, sores, new skin growths, have had cancer, or if you need a vaccine. pres, a rare, potentially fatal brain condition, may be possible. some serious allergic reactions and lung inflammation can occur. feel unstoppable. ask your doctor how lasting remission can start with stelara®. janssen can help you explore cost support options. [♪] did you know you can address one of the root causes of aging by targeting all the cells in your body? try tru niagen. life as we know it cannot exist without nad. as we age, nad can decrease by as much as 50%. tru niagen is proven to increase nad, to support heart and muscle health, and energy production that starts in your cells. address one of the root causes of aging with tru niagen, researched by the world's top scientific institutions. if you used shipgo this whole thing wouldn't be a thing. yeah, dad! i don't want to deal with this. oh, you brought your luggage to the airport. that's adorable. with shipgo shipping your luggage before you fly you'll never have to wait around here again. like ever. that can't be comfortable though. shipgo.com the smart, fast, easy way to travel. officials are increasingly concerned russia's war in ukraine could complicate efforts to secure release of u.s. citizens currently head in russia. cnn's brian todd has the latest on two americans being detained there right now. wnba start brittney griner and former marine trevor reed. >> reporter: after spending nearly two months in a russian jail serious concern answer the condition of star american basketball player brittney griner. concerned voiced by head of the wnba players union on abc. >> most concerned about her health and safety especially mental health. hearing she's in that respect okay. >> reporter: wnba commissioner saying griner jail and allegations carrying cannabis oil at the moscow airport is safe and getting access to her legal team in russia. >> trying everything we can, every angle. working through with her legal representation. her agent. elected leaders. the administration. >> reporter: griner able to see her represent niv russia twice a week and able to receive letters and correspondence sources tell cnn. but vladimir putin's war in ukraine could dash any hopes for a speedy release. >> he's not grog to release anyone he has in custody. going to try to use it as he has been probably behind the scenes all along as the bargaining chip to get something from us. >> reporter: little the u.s. government can do now. >> limited leverage over russia for obvious reasons right now given the political situation. >> reporter: one former u.s. officials believes putin has strong motivation to keep holding griner. the fact she's a u.s. olympic gold medalist. remember, seized in february right after the olympics when russia was roundly embarrassed yet again for doping of its olympic athletes. a way to get revenge at the u.s. olympic committee. >> reporter: another american held in russia trevor reed on tuesday had a court appearance by video, his appeal kicked back to a low are court. his parents worried he may have tuberculosis. >> looks terrible in that shot on the tweet, and really concerned because he really looks thin. >> reporter: u.s. officials openly concerned about reed's health. >> we believe he needs urgent treatment to prevent further deterioration in his medical condition. >> reporter: reed sentenced to nine years for allegedly endangering the lives of russian police office while drunk, which his family and u.s. officials deny. on tuesday reed's father made a bold statement about his son's situation. >> taking him for trade what they want. he's not coming home unless they get that. >> reporter: court brittney griner, trevor reed or the other american detained in russia be traded? >> extremely rare. in the current political situation especially difficult to arrange something like that. not impossible extremely difficult under current conditions. >> reporter: analysts with spoke to say a risky strategy to speak out so achb on behalf of these d detainees in russia. it might irritate vladimir putin more. wnba star leeza leslie were told not to make a big fuss over she might be used as a pawn while the ukraine war is still going on. brian todd, cnn, washington. thank you so much. ukraine president zelenskyy has been labeled target number one by russia. cnn's jake tapper asked him what he hopes his legacy will be. here's more of that exclusive interview. >> reporter: there is a chance that you will not survive this war. the russians have made it clear that they can you a nazi, et cetera. all that nonsense. how do you want the ukrainian people to remember you? how do you want your son and daughter to remember you? >> translator: a human being that loved life to the fullest, and loved his family, and loved his motherland. definitely not a hero. i want people to take me as i am. a regular human. >> reporter: you've inspired a lot of people. including not just here in ukraine but around the world. who inspires you? who are your heroes? whose story to you look to for inspiration during dark days here? >> translator: only the people. i believe our people are genuine and unique. and i just can't afford to be worse than them. at certain moments i feel all of this is dangerous, i understand that all the rest of us are going through this as well. what people are feeling like, who are in basements. who lost their children. what our soldiers feel like right now. and i understand i have to be the strongest one in this situation, and this is all. the most important is the way my children look at me. they have to be proud of me. this is the most important thing. i do everything for this. >> reporter: is ukraine going to win this war? >> yes, of course. and will. >> and coming up, here in the u.s., it's been a violent easter weekend as maltultiple mass shootings wrwreak havoc on communities. you're live in the "cnn newsroom." 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just ask your asthma specialist about dupixent. it has been a violent and deadly easter weekend so far with multiple mass shootings across the u.s. from a bar and grill to a mall in south carolina to an under aged party at an airbnb in pittsburgh. gunfire has taken lives and wounded many this weekend. cnn is following that all for us. all right, nadia, let's begin in pittsburgh where police are searching for multiple shooters? >> reporter: that's what they're looking for right now, paula, multiple shooters. when they arrived there was gunfire happening inside and outside of this massive house party at an airbnb rental in the city of pittsburgh. they say that about 200 people attended this party overnight. and the majority were under age this is what we know. two people are now dead. they were both juveniles, boys, under the age of 18. there were eight gunshot victims and multiple other people who were injured. police say they were jumping out of windows trying to get away from the shooting. now they're looking for multiple suspects, multiple shooters who were involved. police say it was the most chaotic scene when they arrived. take a listen. >> you had officers and medics who were tried to attend to victims that they found. we would be notified there was a victim over at this location, pennsylvania state police were able to stop a vehicle that had a victim in it. there were multiple scenes. it was complex and chaotic. >> reporter: paula, police say when they arrived they saw drugs, guns and alcohol all at this under age party. >> and, nadia, there were two shootings in south carolina this weekend. what have you learned about those? >> reporter: it seems it doesn't matter if you're in a big state, a populated city or a small town, we have gun violence happening this weekend. in columbia, south carolina, saturday afternoon there were people there going to the mall just shopping and this large shopping mall and that's when a shooting broke out. police did arrest one suspect. they arrested a 22-year-old, price, and that person has a bond set for $25,000 with some provisions if they're able to make that amount, but this person has been charged for carrying a pistol and police say the investigation is ongoing so there may be more people arrested and more charges coming. we know 14 people were injured, 9 of them gunshot victims. the rest were injured with bruises and broken bones from a stampede when people were trying to get away, get out of the mall and out of harm's way. some were injured with broken bones and bruises. one victim was a woman, 73 years old, still in the hospital this easter, trying to recover. police are asking anyone with any information in both shoot togs shootings to come forward. in south carolina they are looking for suspects there. fortunately no deaths in that shooting. we are seeing shootings all across the nation. >> nadia, thank you for your reporting on what is an increasingly common occurrence. coming up, we go back to ukraine. president zelenskyy says there are several thousand children missing from mariupol saying nobody knows where they are. you're live in the cnn "newsroom." better footlongs, and better spokespeople. becaususe you gotta you gotttta refresh to be fresh faces get all the love what about the body? 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