outside of mariupol, ukrainian officials point to nassau satellite images that show ground in one area has recently been disturbed. they also say claims from one source indicate that the site has been used to dispose of bodies. cnn is working to independently verify those claims. >> meantime, russia has unveiled a new goal in the conflict, a new strategy. a commander saying taking control of southern ukraine and even donbas region to establish a land block of crimea. there is new credit yo that shows utter destruction in the small village of moschun, north of kyiv. house after house flattened. the ukrainians played a major role in pushing back from the city. 100,000 people are trapped in mariupol including soldiers and sillians. ukraine's deputy prime minister announced this morning, a humanitarian corridor is now open to evacuate, women, children and the elderly. this morning, we are hearing reports of more shelling in the kharkiv region. we're going to bring you up to date with that. let's get the latest with cnn's scott mclean joining from us wlee ev lviv. talk to us, scott about the suspected mass graves they're finding. >> reporter: yeah, this is in a village just either of mariupol. what you see on the satellite images is a series of trenches that are dug. earth is obviously disturbed in the images that may be 40, 45 yards as long as or so. they're located inside the cemetery inside this area, an existing cemetery. but local officials say these are the sites of mass graves where the victims of mariupol are being dumped by the russian forces there. as you mentioned, cnn, though, can't independently verify that claim. there is no doubt, though, that mariupol has been largely reduced to rubble. the destruction is vast. what has been harder to get a handle on or quantify is the human toll. those who are still alive are hunkering down in basements, they've been there almost two months now. one of those places the azozstal are making it there and the workers who took shelter in the deepest basement they could find. in the new video released from ukrainian forces you can see just how deep this bunker actually is. going down inside of it, you can see the russian word for children written in spray paint on all of the walls. then when you get to the bottom of the stairs, you see a lot of kids who have not seen sunshine in a very long time. they explained to the soldiers what they've been doing, trying to pass the time. trying to play games, things like that. here's what one boy said to the camera, though. >> translator: i hope we can leave here and see the sun. because we sat here for two months already. i want to see the sun. so that when our houses are rebuilt, we can live in peace. so we can live in ukraine, because this is our native home. >> reporter: so, some residents of mariupol hopefully will be able to see this done. but very likely not the people inside of that steel plant. there is a humanitarian corridor that's being ordeganized today. it was supposed to have left towards the west towards zaporizhzhia, it's not clear if it's move already. this is postsupposed to be a se of buses to move the people. but ukrainian forces are russians may push them to russia. mariupol is one of the last strongholds in the eastern past of the ukraine. russians continue to carve out more territory in the donbas. and according to a military commander, we spoke to russian media, that is the second, phase two as they're calling it, of the operation. to completely control the donbas region including mariupol and the southern part of ukraine along the black sea, that would connect russia to transnistria. the difficulty is that area is not part of ukraine, or russia. it's actually moldova. it's a separatest part of moldova there. there have been russian troops stationed there since the 1990s. many people speak prrussian in that area. it's infringing on a second country. obviously the moldovans are not keen on this. is he summoned the prime minister to say moldova is independent and should respect its borders. >> there are have been multiple times that moldova may be a target after whatever happens with ukraine unfolds. scott mclean, thank you so much. and they're facing fierce opposition in one community of luhansk. >> cnn's international correspondent ben wedeman has more. >> reporter: russian forces tried to seize the control of the town an hour and a half drive from here to the east of here. but they are running into stiff resistance from the ukrainian defenders. we were able to get to a vantage point overlooking the town, as saw as artillery fell on all parts of the city. in the southern area which is controlled by the ukrainian forces, we found a small group of people, trying to survive under fire. and it begins again. hell rains down. a dozen people are hiding in the basement of a bombed out theater in the town of rubizhne. let it stop, oh lord, he says. now there's incoming. a white flag hangs outside to no effect. the theater above has been bombed and bombed again and again. yet, they stay. too poor, too old, too frightened to flee. nina, 89 years old, has been here for five weeks. i want to go home, she says. i've suffered too much. i've seen the fire and the smoke. i've seen it all. i'm scared. nina's plea simple. help us. help us. her daughter ludmilla struggles to comfort her. we're praying to god to stop it, she says. to hear us. ina says, i have nowhere to go, i have no friends, no relatives. with the shelling intensifying, volunteers are finding it hard to deliver food. as russian and ukrainian forces fight for control over rubizhne, there are people down there. praying as hell rains down. what we saw in that shelter are people who clearly have posttraumatic stress disorder. they've been there for weeks on end. most of the time when we brought lights with our television cameras. most of the time, their only light is candles. there's very little in the way of sanitation. there is no running water. there is no electricity. and for many, if they don't get out soon, there's no hope. >> thanks to ben wedeman for that report. let's get analysis from cnn's global affairs analyst kim dozier. she's also a contributor at "time" magazine. we have cnn military analyst lieutenant general mark hertling. thank you for being with us this saturday. general hertling, i'd like to start with you. the uk's defense ministry said that russia's made no major gains in the past 48 hours of fighting. there's still conflict as ukrainian forces try to fend off the capture of mariupol. what do you see in the new phase of russia's war where the focus is on building this land bridge? >> well, first, i think there's been no major gains in the east, boris, and that's been true. there has been some advanced movement by russian forces. in many cases they've been countered by ukrainian counterattacks. what you had was a general who is the central military commander. that's one of their bigger districts. he said that the southern advances would now go through odesa and into transnistria as you mentioned earlier. i was on the border of transnistria about ten years ago as commander in europe. that is what's called a frozen conflict. it's one of many in europe where russia continues to disturb the democratic and sovereign nations of europe. transnistria does have some russian speakers, as you said. however, having said that, is russia able to complete that land bridge from mariupol all the way to odesa and beyond? i don't think so. they do not have the capability in terms of force size. they don't have the force training. it's another act of advance. and if you look at the map you're showing right now, the distance between odesa and mariupol doesn't jump out but it's about 500 -- close to 500 miles. mykolaiv is a city of 500,000 in terms of population. odesa has 9 00,000. so, you're talking about repeated battles as we've seen so far where the civilians of various cities are going to be challenged with artillery strikes and russians murdering them. but i don't think we're going to see the russian capability of obtaining their new objective. >> kim, you asked a senior european official this week about that intent to essentially build the land bridge across southern ukraine. what was your impression of how western allies see that goal? >> well, you know, at the start of this war, there was fear that the white house would have to be pushing europe along. so i was really surprised at the sort of baltic answer i got from european commission executive vice president dombroski who was in d.c. for talks. he told us we need to stop russia's aggression in ukraine because putin will go as far as we let him go. if we don't stop it now, this war will spread. that wasn't the attitude early on. that was only being said by some of the baltic nations that neighbor russia. and now it seems that european union officials understand that ukraine is not moscow's only intent to seize. >> and, kim, i want to stay with you because vladimir putin and volodymyr zelenskyy are expected to hold talks with turkey's leader recip tayyip erdogan, that's supposedly happening in the next 48 hour, potentially paving the way for peace talks in istanbul. is it your impression that at this point vladimir putin wants peace? >> it is hard to see anything constructive coming out of this. and ukrainian officials will tell you, they are engaging in peace talks just to show that they are willing to stop the fighting. but all of the signals we've had from vladimir putin are that he intends to continue this conflict. he also might be engaging in these talks, simply to see how much he can get the ukrainians in terms what they might offer on the negotiating table. but it seems he is intent on keeping all of the territory that his troops have seized in the east. and then, according to the general who spoke out, continuing to march onward. and his troops are still committed to the fight. we don't see any signs of him being willing to back down. so this is a necessary exercise. but i don't know what it will produce. >> general hertling, the white house announced a new $800 million package of aid for ukraine. it's designed to shore up some of the weaknesses of the ukrainian forces, specifically with artillery systems that the ukrainians are currently being trained on. what do you make of the package that's being sent over, the logistical issues of getting it where it needs to go in the country, and any future opportunity, where can united states best help ukraine in the battlefield? >> yeah, boris, i think the package actually broke the dam from nato nations. what you're seeing is about five battalion artillery and intelligence gatherers, 200,000 155 rounds. what you're seeing france, netherlands also saying we're going to give artillery too. this fight that we're in today, the one that started recently this so-called phase two is going to begin with massive artillery duel. that is the way russia conducts warfare. they've been using the artillery to bomb house information the east. they're attempting to use the artillery to do the same thing, to threaten the civilians but to counter any kind of ukrainian counterattacks. if ukraine can stop those massive artillery fires it would be a very good thing in the donbas region. and i think the 155 artillery pieces, a piece, by the way, that has a larger piece of ammunition than the russians fire will be critically important. and it will help ukraine transfer to a western-style army which is needed during this second phase. i think we're also going to see additional equipment given in the coming weeks and months to prepare them potentially for a third phase which is building a ukrainian army that watches those in the west, that can easily conquer anything the russians throw at them. so, you're seeing this in phases. i think the second phase has been a very good one. >> general mark hertling, kim dozier, we have to leave the conversation there. we appreciate you sharing the weekend with us and your insight. thank you very much. >> thanks, boris. >> of course. congresswoman marjorie taylor greene is fighting to stay on the ballot, and she faced a grueling report. >> you may answer the question. >> i had no knowledge of any attempt so that's questioning i can't answer. >> well -- >> i can't answer that question. >> our reporter was in the courtroom the entire time. he's with us next to take a look at the case and tell us what happens now. also, the lingering confusion over when and where to wear a mask. we're asking experts key questions, how effective are masks if no one around you is wearing them. under budgdget too! and i get seven days to love it or my money back... i love it! i thought onlinene meant no one to help me, but susan from carvanana had all the answers. she didn't try to upsellll me. not once, because they're not salespeople! what are you...? guess who just checked in on me? 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>> it was an exhaustive seven-hour day. very long hearing. she was on the stand, as you said for three full hours which is a first. no other member of the congress has ever been questioned under oath about january 6. who they were talking, who was participating in the plans. the questions are still unanswered. from greene, you know, we didn't learn that much. it was a lot of i don't know. i don't remember. i don't recall. but she was grilled over tons of things. her social media posts. her violent rhetoric. whether she had any meetings for phone calls with some of the provocateurs and extremist groups that fueled a lot of the violence. the challengers from a liberal advocacy group and the team of constitutional scholars, they wanted to pin her down, hold her accountable for what she previously said. i want to play a clip where they really took it to her and said, you know, wanted to find out if she knew about the violence. that's what this is all about. if she knew about the violence, they could say she helped the insurrection, did nothing to stop it. and nthat's how they could disqualify her from office. listen. >> prior to january 6, did anyone mention to you the possibility that there might be violence january 6, 2021. >> i don't remember. >> though, it's possible that folks told you, things could get violent in washington on january 6, right? >> i was a brand-new member of congress. i don't remember those conversations. but i would those in charge of the capitol were taking the capitol security very seriously. >> yes. so kind of dodging, weaving a little bit. couldn't get pinned down on much. but her bottom line defense on this, christi, is that she had nothing to do with the violence. and therefore, she can't be thrown off the ballot, but we'll see. >> so, what happens at this point? what happens next? >> well, so the administrative judge who is presiding over the hearing yesterday. he probably will issue his recommendations in a few weeks. probably early may. then it's up to the secretary of state here in georgia, brad raffensperger, he's on the receiving end of donald trump's wild phone call, cajoling him to steal the election. somehow, we're still talking about the 2020 election two years later but it will be up to the secretary of state to make the final call. >> based on what we saw, is there any gauge how likely it would be that she would be -- i guess she'd be pulled. she wouldn't be able to run again? >> she wouldn't be able to run. if anybody votes for those, note votes wouldn't get counted. i'd say it's an uphill climb. this is not an easy task. the challengers didn't establish for instance that she knew about violence. they didn't establish that she had any secret meetings with people, encouraged them to storm the capitol, flood the capitol. it's really a case based off of her vitriolic rhetoric and to inspire and come to d.c. and ransack the capitol. >> first of all, when she walked into the room, she had a lot of support. >> huge. it's her home turf. >> it's her home turf. one person being matt gaetz, he was sitting with her legal team. you were sitting right there, as i understand. so talk to us about the mood in the room? >> it was a very pro-greene crowd. i mean, paint the picture of team of lawyers that challenged her, obviously, most of them are not from georgia. they knew in for the event. a lot of green supporters drove in from her district, presumably, that's in the northwest part of this state. it turned into a bit of a circus. you know, and the judge was trying to do his things in. let's show you a clip where in a moment things kind of got off the rail. >> entitled to yes, no, or i can't answer response. >> let's go ahead. >> listen -- >> the judge can -- >> you have understanding of objections to everything in the world. i want to question your witness. she's doing fine. >> wait a minute, wait a minute. >> stop. >> next question. this is not theater. this is not an argument before the supreme court. this is an evidentiary hearing. so, let's get going. >> she wanted them to just play it straight. follow along, and it turned into a bit of a ruckus, but that's going t