A Defense Shakeup as the war with russia enters its 19th month, ukrainian president Volodymyr Zelenskyy firing his Defense Minister. The president of ukraine saying it is time to try a new approach. What this could mean for the battlefield. Plus, Stuck In The Mud. Thousands still trapped in the Nevada Desert after intense rain left the Burning Man Festival site smothered and covered in mud. Roads might reopen any moment. We are going to get you an update. And President Biden touting bidenomics and slamming former President Trump this labor day in philadelphia, but a new poll shows most americans that were polled arent buying bidens message. Were following these major developing stories and many more all coming in right here to Cnn News Central. A major shakeup at the top of ukraines military as russia continues to launch attacks on civilian targets. Overnight russia launched what ukraine described as a Massive Attack on civilian infrastructure at ports in the southern odesa region. Its also accusing russia of trying to create a food crisis with attacks on Port Infrastructure over the weekend. Today ukraine says its forces are making further advances in its counteroffensive and liberating more areas along the Southern Front line where some of the heaviest fighting is taking place. All of this coming as ukrainian president zelenskyy shakes up the highest ranks of his military. Hes firing his Defense Minister as the country enters the 19th month of this invasion. Cnns melissa bell joins us live from zaporizhzhia, ukraine. Melissa, what more do we know about the reasons behind the firing of the Defense Minister . Reporter well, not that Oleksii Reznikov had done anything wrong, on the contrary, this is a man thats been widely praised for what he has done over the course of the last 19 months now. It was apparently his request that he move on to other things, but this of course allows president zelenskyy to draw a line under the last few months. There have been so many allegations, Corruption Scandals that have dogged the Defense Ministry in ukraine, there have been sackings, resignations and arrests as a result of some of these and although none of them ever tainted Oleksii Reznikov personally they have rather marred the whole effort certainly in the eyes of many allies this. Allows him really to draw a line again at the request of Oleksii Reznikov himself and to bring in a completely new person to man this war effort and apparently what we hear is that they have just the man for the job. A daunting challenge but this is a man who has a lot of experience, a business leader, closely involved with the war effort having overseen Prisoner Exchanges and he is actually a muslim, not at all from president zelenskyys party. It is an interesting choice but he is considered extremely capable. This is a man who is going to have to keep his western allies on board for the ever greater needs he is going to have with regard to weaponry to see this counteroffensive through even as he shores up ukraines own defense capabilities with what theyve been doing recently trying to create more and more groans, trying to make more and more long range artillery so they can continue successfully bringing this war ever closer to russian soil, boris. Melissa bell reporting live from zaporizhzhia. Thanks so much. China is signaling that president xi jinping will skip the gathering of the gather in india. This will be the first time a chinese leader will miss the g20 summit. It comes as tensions simmer over the the border. Vladimir putin will also skip the summit. Nic robertson joins us now. What is this decision by china say about the state of what might happen at this summit . How might it impact the summit i should say . Reporter its going to diminish the impact in any agreements that might emerge from the summit. Not having President Putin and not having president xi is pretty significant. Obviously putin cant travel because he is afraid of getting arrested for the charges of war crimes that have been leveled against him. Xi its not quite clear why hes choosing not to go, could it be the tensions, does he want to avoid a meeting with President Biden . He also has the opportunity to meet President Biden of course at the apex summit in San Francisco later on in the year. So the possibility that the pair meeting still remains, but when you look at the fact that just less than a month ago president xi went to south africa for the Bricks Summit there, which is an emerging develop nations alternative, if you will, to the g20, a summit where they said they wanted bigger nations like saudi arabia and some other powerful nations to join, you can see how the sort of the g7s, the g20s, that sort of old big powers are going to get marginalized by empowering like president xi empowering effectively the Bricks Summit. It diminishes what they can achieve. Of course one of the huge items recently was dealing with covid but the other one has been climate change. So you dont have big nations writing the script for the next years coming of climate change. It can be done at the cop summits but they are the Big Powerfuler Nations and this will be absent. The news we have is that president xi is planning not to come but people will be reading the tea leaves heading up to and likely through the summit as well. Nick robertson, thank you. Back in the United States after days of being stranded in treacherous thick mud, the Nevada Desert, were starting to see some people at the Burning Man Festival start to leave. You can see in this new video a huge caravan of vehicles making their way out. It is going to be a difficult journey in part because at this hour officials are starting to open roads that have not been dry enough for people to begin their journeys home. Some 70,000 festivalgoers have been stranded in the mud for days after 2 to 3 months worth of rain swamped the area in just 24 hours. Camila bernal is live on the scene at the Burning Man Festival. What does it look like where you are . Reporter it is busy, boris. This here is what you call the exodus and, look, i spoke to someone who was inside of the city who told me things are still messy in some areas, depending on where you are. The mud hasnt fully dried up yet, so people are trying to get rides and then end up right here because what youre seeing here is a line of rvs and cars that are trying to make their way out. Again, this is what they call the exodus, but i want to show you from above just so that you can get a better perspective with this true from up high. The line is very, very long and theyre asking people not to walk to avoid walking from the city to where i am right now because it could get dangerous. We are being told that over the last couple of days there were cars that were stuck for hours, people that tried to get to this area where im standing now and had to spend hours either walking through the mud or getting Stuck In The Mud via car. I spoke to the superintendent of Blackrock City earlier today and this is how he described the situation inside the camp. People are trying to get out, but the roads are still pretty muddy and theres Still Standing water, and so theres new roads that are forming around and thats just people working together to get each other out of jams. Reporter now, it hasnt been easy, people have been told to conserve food, water, especially if they were going to stay extra days that they were not planning on staying, but it is also really important to point out that every Single Person that ive talked to has been so positive, saying that theyve made the best out of a very difficult situation, saying that theyve enjoyed the festival. In fact, the burn is happening today at 9 00 local time. So that man will be up in flames and a lot of people are staying and looking forward to that. Organizers even telling people if you can, stay until tomorrow to avoid all of this traffic that youre seeing here behind me. It is going to take people hours to try to get to the highway, boris. Thank you so much. Omar, some people deciding to stay. Yeah, some people deciding to stay. As weve learned, morale is even you know, theyre making the most of the situation. I want to talk more about it on the ground in burning man with a festival goer, andrew hyde. Skies look great behind you. As i understand this is your tenth year at burning man. Have you ever seen anything even remotely like this . No, we have had years when its rained, this is the first time ive experience it had myself. We had six hours of rain on friday, a little bit on saturday and it was an absolute mess, couldnt move around at all. It was fun to see for us that really kind of were prepared and knew this could happen, but, yeah, kind of staggering to see a city of 70,000 people that really nobody could move. For anyone who has been to festivals in general, Music Festivals or other, its not a guarantee you are going to have great weather. This one seemed to stick out because of how remote you all were and the conditions of the ground itself. When do you expect you will be able to leave . Were you always staying or are your plans kind of up in flux . Yeah, i mean, like the unofficial motto of the festival for me is always new plans. Throw everything out, we have to identify everything thats going on right now and its a much more colorful description of that. Yeah, i mean, today was kind of the day we always had planned on leaving. I think were going to probably break tomorrow morning, we are looking at the roads like everybody else. Safety is a big concern for the organization so were kind of listening to the official channels on that and not exiting until they kind of give us the green light that its good for everybody and looking. Its drying out, the sun is out behind me, its really beautiful. We are enjoying it and you hear in the background, occasionally a car will get unstuck and there is a loud scream or people are saying goodbye. You lived through a situation in which you couldnt move. Not many people get to experience that. Yeah, look, Today Is The Day where i dont know if youve been able to see but weve been showing images of what is essentially a mass exodus of people leaving today. Once conditions were even hinted, hey, you can actually probably get out there, was there a rush to get out on the road . How were people interpreting that opportunity . Yeah, we love the gate crew out here, theyve done a fantastic job. You want to get out, you have this one road and all of these vehicles have to fit on this one basically county road. So, you know, its well communicated but some people had to get out, some people had real real life to get to and some people like me had the opportunity to stay an extra day and just kind of hang out and be in the desert for a little bit longer. Its a Baron Waste Land with some of the most amazing art in the world, thats why we come out to burning man. It elevates of what we think we can do as humans and we love to be out here. Yeah. Andrew hyde, youve been here ten times, are you going to be back for 11 . Oh, absolutely. I figured that would be your answer. Andrew hyde, thank you so much. Boris . Still to come, a judge could soon rule on mark meadows bid to get his Georgia Election case moved to Federal Court while donald trump and his codefendants prepare to be arraigned in the coming days. Plus another day like january 6th. Thats what republican candidate Vivek Ramaswamy says will happen if trumps legal challenges hamper his 2024 bid. We are going to discuss that. 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Buy one footlong in the app, get one free. For freeee. Thats what im talking about. Order in the subway app today. How white do you think your teeth really are . Lets try the tissue test. Ooof, still yellow. Whitening toothpaste can only do so much. Theres toothpaste white, and theres crest 3d whitestrips white. So much whiter crest. Its a pivotal week in the Georgia Election interference case. On wednesday the remaining codefendants will be arraigned in fulton county. Former President Donald Trump will not be there, he already pleaded not guilty to his charges, but he will be watching closely what happens with his former chief of staff. Remember mark meadows is trying to move his case from state to Federal Court and a judge is set to rule on that potentially before this weeks arraignment. Cnns sara murray is tracking all of this. Walk us through what could happen this week. First were waiting for this judge to weigh in on mark meadows bid to move his case to Federal Court. He argued everything he did around the 2020 election perhaps to try to overturn the results in georgia as the District Attorney has alleged was actually related to his duties as white house chief of staff. A judge is going to weigh in on whether that argument is successful and meadows can move this to Federal Court. The trump team is watching that closely. Donald trump hasnt made an attempt to move his case to Federal Court yet but we expect theyre watching to see how the meadows situation plays out before they do that. On wednesday there was set to be a big arraignment with 19 defendants, most of the defendants have put in a piece of paper essentially saying im going to waive my right to an arraignment, enter a not guilty plea, thats what donald trump and Rudy Giuliani has done. We have several holdouts still, we have not heard from yet mark meadows is one of them, hes probably waiting to see if a judge intervenes first, john eastman, jeffrey clark, other big names who have not yet entered their plea. We may see a flurry of pleas and waivers getting entered tomorrow morning. The last thing later on this week is the special purpose grand jury which did the brunt of the investigating in this case, a judge is planning on unsealing their report. We will be looking later on this week for, one, does that actually become public and, two, are there any discrepancies between who the Special Grand Jury thought should be indicted and who the District Attorney decided to bring charges against. Fascinating details to gather from that. Also trump hasnt moved to try to motion to get his case moved from state to Federal Court, he has moved as have others to try to sever his case from the rest of the codefendants. Whats the status of that . Thats right. Donald trumps team has made clear they have no interest in going to trial with any of the other people mentioned in this case. The state court judge has sort of said im going to wait until everyone gets their pleas entered, everyone waives their arraignments or shows up for arraignments and then im going to figure