this is bbc world news today. i'm kasia madera. our top stories. world leaders have gathered in buenos aires for the 620 summit. but there's tension between the leaders over many issues, trade, climate change and the situation in ukraine. the government in kiev raises the tension with moscow. it bans russian men from entering ukraine. the marriott hotel group says hackers have stolen the personal details of hundreds of millions of its customers. and we'll bring you the extraordinary story of how doctors were able to rebuild this man's face, after he suffered disastrous gunshot wounds. hello and welcome to world news today. as the 620 summit gets under way in buenos aires, the prospects for amicable discussion among the world's leaders are looking distinctly shaky. russia's involvement with ukraine

is causing friction, the us—china trade war isn't showing any signs of cooling, and the murder ofjamal khashoggi has thrown a harsh spotlight on the saudi crown prince, mohammed bin salman. but at the centre of it all, stands the us, and donald trump's attempt to re—shape the world's trading system, to america's benefit. our north america editor jon sopel is in buenos aires. it's not the most catchy acronym but the usmca, or the united states mexico canada agreement, shows that donald the disruptor. .. this has been a battle. ..can also be donald the builder. the usmca is the largest, most significant, modern and balanced trade agreement in history. all of our countries will benefit greatly. it is probably the largest trade deal ever made also. but his protectionist "america first" instincts are causing deep unease, and though they were all smiles, listen to the words of the canadian prime minister...

make no mistake, we will stand up for our workers and fight for their families and their communities. and, donald, it's allthe more reason why we need to keep working to remove the tariffs on steel and aluminium between our countries. the key meeting of this 620 will take place tomorrow evening, when most of the other world leaders are already on their way home. with donald trump threatening further tariffs against the chinese, meeting with president xi is absolutely critical. it's no exaggeration that the future direction of the global economy could be decided at the meeting. one person he won't be meeting is vladimir putin, ostensibly over russia's seizing of three ukrainian vessels and ukrainian sailors. but the investigation into donald trump's links with moscow in the run—up to the election has ta ken another twist. in court yesterday his long—term personal lawyer and mr fix—it, michael cohen,

revealed that for far longer than previously stated, his boss was looking to build a trump tower in moscow. today from the president, a grudging acknowledgement that was true. and look at the body language here, as no eye contact is made between the american and russian presidents. the one person who did seem happy, almost overjoyed, to see vladimir putin, was the saudi leader mohammad bin salman. he's looking to rebuild his reputation after the brutal murder of jamal khashoggi. but donald trump won't see him, and a number of other world leaders have declined meetings too. the young saudi prince is discovering what people in this city in particular have known for a long time, it takes two to tango. jon sopel, bbc news, buenos aires. plenty of other lines have emerged from the 620 summit so far.

donald trump has also touched on the trade war with china: he said there were some good signs, and he would see what happens when he and president xi jinping have dinner on saturday. but as you might expect, the event is not passing off without a bit of protest. these are live images of protesters. there are 20,000 police do ploy to in windows areas —— buenos aries. as you can see, people are still out on the street protesting. 0ur correspondent katie watson is with the protestors, just a few kilometres from where the summit is taking place. let's hear from katie let's hearfrom katie watson let's hear from katie watson who is on the street. ....which is the widest

avenue in the world, and people are making their way to congress where several different groups will be gathering until later evening. people here are asking, they're out with trump, out with the 620. the people have been at the meeting of world leaders, the say they don't represent the majority of people, poor and marginalised, but mixed in with that, argentina's own problems. president macri is facing an economic crisis here in argentina. inflation is over a0%, growth is sluggish, they've had to take a massive loan out from the inf. people are frustrated so that mix of both the 620 and home—grown problems is what's bringing people out on the streets today. the next few days have been declared a bank holiday in order to make sure people stay away potentially,

but as we can see, the protesters still very much out on the streets. that's right, friday, today has been declared a holiday, the authorities have asked people to leave the city if they can. many roads are blocked off, and in fact this protest is nowhere near the 620 convention. there is a 12 km caution around the area where the leaders are, and we are about three or four miles away from it here, but all the roads across the centre of buenos aires have been locked down. it is very hard to get across, makes it hard for the protesters here to get to this demonstration. with more than 20,000 police agents on the street, the authorities don't want to take any risks. like she was saying, security very tight and protesters are there. katie watson thank you. the tensions between president trump and president putin are of concern at the 620 summit.

it's notable that the white house cancelled a planned meeting between the two leaders on the sidelines of the summit. here's mr trump outlining why the bilateral meeting, as they're known, was dropped... we don't like what happened. we are not happy with what happened, and nobody is. and with respect to the ships and sailors, we hope to fix the issue. while mr trump was saying that in buenos aires, ukraine was taking some very public anti—russian action: it has banned russian men aged between 16 and 60 from entering the country. the reason given by ukraine's president poroshenko was to stop the formation of what he called ‘private armies‘. it comes just days after russia seized three ukrainian ships and their crews near the crimean peninsula, which was annexed by russia in 2014. richard lister reports. another day of exercises for these ukrainian troops amid growing fears of a russian invasion.

kiev has already imposed martial law in these border regions. now the ukraine president has banned russian men of fighting age from crossing into the country. translation: these measures are to block the russian federation from forming private armies here under the leadership of the russian armed forces, and to prevent them from carrying out operations like those we saw in 2014. when russia annexed ukraine's crimean peninsula four years ago, it was these russian militia men in unmarked fatigues who led the way. they quickly took over the airport and other key sites. ukraine sees last week's clashes in the kerch strait when russia seized three ukrainian vessels and their crews as the first steps to another russian land grab. but moscow accuses kyiv of overreacting. translation: i think it would be very scary if anyone tried to mirror the decisions taken in ukraine. this would be madness. what has happened

there is the result of a dysfunctional government. kiev wants nato to patrol this stretch of water between russia and ukraine. ukraine's allies are wary of inflaming tensions further, but the eu has signalled today that it is likely to extend sanctions against russia later this month. richard lister, bbc news. let's take a look at some of the other stories making the news... belgian police have used water cannon and tear gas against protestors who allegedly threw rocks at the prime minister's office in brussels. the demonstration was apparently inspired by the ‘yellow vest‘ protests, which took place across france against increases in fuel prices. france‘s president marcon has raised fuel duties as part of an effort to reduce emissions which cause global warming. reports from the us say president trump has put in a request to extend the deployment of troops to the border with mexico to counter the threat of illegal immigration. more than 5,000 troops were sent

to the border last month, as a caravan of would—be immigrants made its way through central america. reuters news agency is reporting that the trump administration has now formally asked the pentagon to extend that mission. the ebola outbreak in the democratic republic of congo is now the second biggest in history. the country‘s health ministry says there are a26 confirmed and probable cases. the epidemic is now only surpassed by the 2013—2016 outbreak in west africa, where over 28,000 cases were confirmed. a powerful earthquake has hit alaska, causing damage to homes and business, and triggering a tsunami warning. the 7.0 magnitude quake was located about 9 miles north of anchorage and struck at 8.29am local time. the quake and several aftershocks shattered windows and knocked power out to many residents homes. in the last hour, local resident

travis starling experienced an aftershock and was woken up by the earthquake this morning. he is safe and joins us on the line now from alaska. ask with a switcher experienced. —— explain to us which you experienced. iam explain to us which you experienced. i am safe now. at first i thought it was a lot of people outside, and i realise whatever the shaking began that it was not the case. ijumped out of bed, and i stood in the doorway to wait for pass, and at said it felt like it lasted about an hour, but it was only a minute. it was terrifying to stand there in the doorway, and watch everything in the house around me fall for the glass shattering about one models falling to the floor in the kitchen. it was very difficult to know. is this

something you have experienced before? i have experienced earthquakes here before. i‘ve been here about two years now, and we had a pretty mild one relative to this in the summerand a pretty mild one relative to this in the summer and winter is that just passed, but this by far is a much more severe earthquake that any of those. we are seeing some of the images. a local newsrooms sent us images. a local newsrooms sent us images and you can see the damage. what kind of damage and you have in your home? i think i'm fortunate that it seems mostly cosmetic damage. 6lass head shattered on the floor, televisions have fallen off stands they are on. furniture and tables... 0r, buti

stands they are on. furniture and tables... 0r, but i really do believe i am one of the fortunate ones. “— believe i am one of the fortunate ones. —— birchers and tables got knocked over. some buildings or collapsing. we had the earthquake backin collapsing. we had the earthquake back in 1968, and one of the buildings were built to withstand the earthquake. back at me from being in danger, because i live in an apartment complex. there is a floor above me, and i was wondering if someone would fall onto me. i think that would be very u nfortu nate. think that would be very unfortunate. we‘re very put... think that would be very unfortunate. we're very put... we are very pleased to hear that. thank you very much for your time. we hope you very much for your time. we hope you are safe. of course we‘ll keep you up to date on that. stay with us on bbc world news, still to come: the amazing story of how one man‘s face was rebuilt, after a life—threatning injury. it's

it‘s quite clear that the worst dictators of this disaster people living in the slums which are near the factory. the children are dying, they can‘t do anything. charles manson is that leader of a cult, and at least 600 people. at 11 o‘clock this morning, just half a metre of rock separated britain from continental europe. it took the drills just a few moments, then felipe were shaking hands and

exchange of flags his opposite number. the shaking hands with robert. this is bbc world news today. the latest headlines. tension between some of the world leaders who have gathered in buenos aires for the 620 summit. the government in kiev reacts to the threat it perceives from moscow. ukraine bans russian men from entering the country. the marriott hotel group says hackers have stolen the personal details of hundreds of millions of its customers. the hotel chain said the guest reservation database of its starwood division had been compromised by an unauthorised party. the records of 500 million customer were accessed and potentially copied. attackers had unauthorised access to the starwood division since 2014. the company said it would notify customers whose records were in the database.

for nearly 330 million guest bookings, the information included a combination of highly senisitive details, including name, email address, date of birth, and even gender. and even though payment card information was encrypted, the company thinks the key may have been stolen too. it is offering customers in the us and some other countires, a year—long subscription to a fraud—detecting service. in a statement, marriot said ‘they deeply regret this incident‘. from san francisco we‘rejoined by henry harteveldt, an analyst at a travel industry marketing firm. what do you make of this, the numbers of people affected are staggering? they are staggering. this has been a four—year hack, and iam this has been a four—year hack, and i am honestly quite surprised as well as disappointed that a world —class well as disappointed that a world—class organisation like starwood, an world—class organisation like

sta rwood, an accommodation world—class organisation like starwood, an accommodation of sta rwood starwood, an accommodation of starwood and starwood, an accommodation of sta rwood and marriott starwood, an accommodation of starwood and marriott would allow something like this to go on. this is unprecedented. this is one of the largest data hacks in history, and it is the largest to have affected the global hotel industry. henry let‘s differentiate now, because it is the starwood division rather than the users of marriott, but for a layman like me what is the difference? so, starwood and marriott are under one company but until a couple of years ago they we re until a couple of years ago they were separate businesses. they were separate corporations that starwood owns brands such as weston, and w stop marriott has its own group. the hackles on starwood reservation system so people who never stayed at sta rwood system so people who never stayed at starwood would not be affected if they had only stated a marriott project. in terms of the information, because some of it is incredibly sensitive, and if you get a combination of a few bits and

e—mail address, name, date a combination of a few bits and e—mailaddress, name, date of a combination of a few bits and e—mail address, name, date of birth, thatis e—mail address, name, date of birth, that is potentially important. e—mail address, name, date of birth, that is potentially importantm absolutely is. consumers have every right to be concerned. when you stay ata right to be concerned. when you stay at a hotel, obviously you have to provide that hotel with certain information for your reservation. your name, credit card information, and so on. we expect that information to be kept safe. at some hotels, by law, they are required to ta ke hotels, by law, they are required to take additional information such as date of birth, your passport information, and that information is then backed up and is extremely alarming that it now potentially is in the hands of hackers. i actually know someone who believes his account has been affected. henry, thank you so much for talking us through this, and for your time without i hope that you haven‘t been hacked my goodness. thank you so much for your time. of course we

have more on that story, if you‘re worried check out some more details on our website. sarah has all the sport. the way in is under way for the title fight in los angeles. he will ta ke title fight in los angeles. he will take on britain‘s thyssen, and it is one of the biggest heavyweight fights in recent history. our reporter at edeh doyen is in and up the atmosphere. yes we join me in the atmosphere. yes we join me in the plaza outside of the staples centre where it is under way. we‘re waiting for dfa wilder and tyson fury to take their turn. the biggest and some two decades. lewis one of the many world champions who are here to witness a fight. he is your as is the better holyfield because

thatis as is the better holyfield because that is a big upset in his own hype. that‘s a very tight to regain the vital connect title over three years of it day since then, he has never come personal issues withoutjust being here feels like a victory, but can because another upset by beating deontay wilder. it is said that any issues of pushing and >> we saw the press conference will incurafine. we >> we saw the press conference will incur a fine. we don‘t want to see the ugliness that we sought a few days ago. this is the less i believe they will see each other. —— last time they will see each other. cameroon has been stripped of the cup of nations. the schedule was to start injune, cup of nations. the schedule was to start in june, cameron cup of nations. the schedule was to start injune, cameron had been under increasing pressure that they will be ready, and the decision was

announced today after a meeting in 6hana. announced today after a meeting in 6ha na. manchester united announced today after a meeting in 6hana. manchester united forward alexis sanchez is facing a lengthy speu alexis sanchez is facing a lengthy spell out what they injury. the chilean suffered an injury in training yesterday and will have a scan to determine the extent of the damage, but mourinho says the series. —— looks serious. damage, but mourinho says the series. -- looks serious. there might experience, i know he is going to be out for a long time. it is not a little, it is not a little injury, that in one week or ten days the player is ready. not after the second leg was moved to madrid next week in, there has been regret around the footballing world that the module no longer be paid in

argentina. a number of players were injured with the team bus was attacked on the way to the stadium but think that game to be postponed. the mesh has lost its meaning now that has been moved to the spanish capital says the to president. it's an abortion mama, because the classico is to be paid in argentina and if it's in madrid, for me, my think it's not important who is going to win or lose going to lose, what happened what happened in but is aries before the game, for me it is aries before the game, for me it is not important over the title of the copa libertadores was going to win. finally formula1 line-up the copa libertadores was going to win. finally formula 1 line-up in india has been complete. lance formation of them next season. the move had been expected. —— will race

for them next season. they said in a statement that is the beginning of an exciting journey and he looks forward to working alongside at a successful tea m forward to working alongside at a successful team with a great country. that is all the sport. vicki so much sarah. —— thank u so much sarah. now to an amazing story of a successful full face transplant. american cameron underwood suffered devastating self—inflicted gunshot wounds, but doctors were able to re—build his face, as tiffany sweeney reports... it was a story of incredible transformation, that has set many new milestones in facial transplant surgery. two years ago, cameron underwood tried to take his own life. in his suicide attempt, he lost most of his face, but unbelievably he survived. in january this year, more than 100 medical staff at the nyu health centre in manhattan, new york formed a 25—hour

surgery for him. it was led by doctor eduardo rodriguez, who says cameron‘s determination to survive helped make the surgery a success. all the careful planning, all the logistics involved led to this kind of result and it ultimately paid off. you can see that in the result of cameron‘s face. the quality of the skin, the matching of the bones, his smiling. it was a remarkable result. the operation was the most technologically advanced face transplant, with the first use of a three peat printed donor facial —— 3—d printed donorfacial mask in the united states the surgery took place just 18 months after his injury. one of the shortest waiting times for a facial transplant. the donor was 22—year—old will fisher, a chess champion, aspiring writer and film—maker. will‘s mum, sally fisher,

said she may not have survived losing her son if it wasn‘t for cameron. with the success of the surgery, cameron is now having a second chance at life. the past couple months have been pretty normal, you know, just trying to do normal stuff and you know, hang out with my friends. since the first face transplant in 2005, more than 40 have been performed for worldwide. a stroke of ingenuity, and compassion from the donor has helped to put a smile back on cameron‘s face. tiffany sweeney, bbc news. an incredible procedure. for me and the team, thanks for watching. while for most of us, a mixed

weekend on the way. there will be sunshine, showers, and saturday morning not looking great across the southern half of the uk. 6ot morning not looking great across the southern half of the uk. got some heavy rain on the way. i will show you where it‘s coming from. this is a satellite image of the last few hours, and it‘s basically the weather front that is making a beeline for the southern parts of the uk. it's beeline for the southern parts of the uk. it‘s going to turn what in the uk. it‘s going to turn what in the southwestern areas of the uk. by the southwestern areas of the uk. by the time we get to midnight, rating in the south of england and wales. this weather front is going to reach london by early saturday morning. it will be colder and clearer in the north. tomorrow a miserable start of the day and the south. there will be a bit ofa the day and the south. there will be a bit of a breeze. this is the hire is forecast. you can see what rain sweeping over southern counties there. not too bad and the midlands.

it will come and go, but by the middle of the morning a few drips and drops. scotland actually it looks quite crisp. three degrees there with sunshine. low—grade clouds across other parts of the uk, and that in the afternoon that weather front is out i don‘t think it‘s going to necessarily turn all that sunny, but at least it‘s going to try out for most of us. there might bea to try out for most of us. there might be a few glimmers of sunshine in the south. as we head into saturday night into sunday, that is one weather front there. this is another one heading our way. sunday morning, we will see rain was that this is very early hours of sunday, the timing is where the chilly weather will be first thing in the morning. split between mild westerlies is very evident, so mild

in the south, and in the north it will be colder with rain expected during the course of sunday. 7 degrees in aberdeen were in london we could get up to 50 degrees. you get the picture it is looking very mixed this weekend, and it is very mixed this weekend, and it is very mixed whether is going to continue into next week as well. we will begin to have that contrast with temperatures in the south and north. this is bbc news. our main headlines. world leaders are and what is there a 36 20 summit irony marked by tensions and disagreements. many of them caused by president trump‘s stance on climate change. it‘s feared the summit may not agree on a final communication. donald trump has confirmed he has cancelled a meeting with vladimir putin on the sidelines in argentina with the situation in ukraine. meanwhile the ukrainian president said it‘s banning russian men aged 16 to 60 from entering the

country to prevent private armies from forming. tensions have been escalating since the weekend. and there‘s been a powerful earthquake in alaska.