welcome to bbc news, broadcasting to viewers in north america and around the globe. i'm reged ahmad. our top stories: donald trump steps up the pressure on north korea, with more sanctions against companies who trade with pyongyang. our new executive order will cut off sources of revenue that funds north korea's efforts to develop the deadliest weapons known to human kind. racing against the clock. rescuers frantic struggle to get people out of the rubble after mexico city's devastating earthquake. the death toll passes 270. the caribbean islands still without power and all but cut off by hurricane maria. authorities ask for all the help the world can offer. facebook promises more transparency over its political advertising. 3,000 accounts from last year's presidential election will be passed to congress. hello and welcome.

north korea's leader has vowed to make president trump pay dearly for threatening to destroy his country. president trump made the remarks at the united nations on tuesday. kimjong—un has now hit back in this war of words, calling donald trump mentally deranged. on friday, president trump imposed new sanctions against individuals, companies and foreign banks that trade with pyongyang. 0ur diplomatic correspondent, james landale, reports. in recent weeks, north korea has simply ignored new sanctions imposed by the united nations and pressed ahead with its nuclear and missile tests. so now the united states has responded by promising to increase its own restrictions. at a meeting in new york

with the leaders of japan and south korea, donald trump said he had signed a new executive order extending us sanctions against companies and banks that finance and facilitate trade with north korea. today i'm announcing a new executive order... the us president said this would specifically target north korean‘s textiles, information technology and manufacturing industries. our new executive order will cut off sources of revenue that fund north korea's efforts to develop the deadliest weapons known to humankind. what's unclear is what impact the sanctions would have on chinese banks doing business with north korea, but after weeks of pressure on china to do more, mr trump said it was tremendous that china had told its banks to abide by existing un sanctions and reduce their engagement with north korea. and again i want to just say and thank president xi of china for the very bold move he made today, and that was a somewhat unexpected move and we appreciate it.

0n the floor of the united nations, president moon of south korea told delegates that sanctions were needed to bring the north to the negotiating table, but he said that seoul was not seeking north korea's collapse and warned against accidental military clashes that could lead to war. translation: we will not seek reunification by absorption or artificial means. if north korea makes a decision even now to stand on the right side of history, we are ready to assist north korea together with the international community. the question of course is whether any of these sanctions will change north korea's behaviour. earlier this week, mr trump threatened to totally destroy north korea if the us was forced to defend its allies. the country's foreign minister, ri yong—ho, dismissed the president's speech as the sound of a dog barking. james landale, bbc news, new york.

two days on from the devastating earthquake in mexico, the country's president says there could still be people alive in the rubble of ten collapsed buildings. 273 people are now known to have died and thousands more have been injured in the quake. 0ur correspondent rajini vaidya nathan is in the capital city. the rescue effort is in full force here in mexico city. close to a0 buildings collapsed in the earthquake on tuesday. this building is in the fashionable la condesa district, which is nicknamed "hipster town", it is normally home to fashion designers, millennials and artists. this operation at the moment is a rescue operation. the marines and the armed forces here believe there are people inside and they're trying to make contact with them. as you can see there are a lot of people and a lot of machinery as well working at the rubble. a lot of it is manual work, people passing bits of the rubble

hand to hand to remove it very carefully because it's a precarious operation. international assistance has also arrived here. the israeli government has sent help and they actually involved in this particular rescue operation. while people wait, there are doctors on standby as well ready to treat anyone who is rescued and who comes out. periodically this place falls silent. people put their hands up and they are told to be silent while rescuers try to call out to people who they believe are trapped in the rubble. it's not just officials who are helping with the rescue efforts here, many of these people are volunteers giving up their own time and pitching in to rescue as many people as they can. the atmosphere here is very intense, it's one of anticipation. people are still hopeful that many more people will be found in the rubble alive.

0n the line is rodrigo from the mexican red cross. thank you very much forjoining us. first of all, how are the authorities and volu nteers how are the authorities and volunteers coping in this rescue effort? good evening mexican time. the mexican red cross is the biggest volunteer organisation in mexico and we have a lot of experience so we're helping the authorities on everything. 0n the research, on finding survivors, victims and organising volunteers. it's amazing that everyone in mexico volunteers. thousands of people around the country are helping, getting on the streets and it's a challenge to

organise the people trying to help and we are helping the authorities. we are working hand in hand with the navy and the army. i think we are doing very well on this. we are getting there. there were reports officials were overwhelmed by this, do you think the mexican government has what they need to continue to rescue people? i think in terms of materials and human resources, yes. they have everything. around the country we have a lot of groups from the earthquake of 1985, we learned a lot from that. around 20 groups were trained to respond. the challenge is the triage and to know where to go

first. that stage has almost ended. we have the rescue dogs. we have around 30 of them, all trained and certified, on search and rescue. in this country we have enough resources to manage something like this. we are a big country. we have the hurricane and then the earthquake. it's been a very intense three weeks. people who want to work, to volunteer, we have

encouraged them and we manage them very well in the red cross. we have many people now working in mexico city. rodrigo de villasante from the red cross in mexico, thank you very much for your time. puerto rico is beginning to assess the damage after hurricane maria ripped across the island. many buildings have been destroyed and the power is still out for more than 3 million. the governor has declared it nothing short of a major disaster. the bbc‘s will grant is there. for many puerto ricans, the first step after maria has simply being to clear a path back to their homes. 0thers, though, no longer have homes to go back to. this small town of catano just outside the capital was hit hard by the vast storm. residentjuan roman lost everything.

his modest home now reduced to a pile of wooden planks, rubble and twisted metal. all i have now is what i'm standing in, he said. his neighbour, evelyn, may still have a home but it is uninhabitable. the winds ripped her roof off and the place flooded. everything from mattresses to electrical appliances will need to be replaced, but it's not the material things that upset her, it's the fact her 101—year—old mother, sheltering from the storm at a neighbour's, won't be able to return home for months, if at all. translation: ijust had to tell her that we lost our home. she wanted to come back but i had to tell her she couldn't because it's gone. i know there are others worse off than us, but it hurts, especially at her age. with thousands of trees felled by the hurricane, debris litters the streets and blocks the highways. the electricity is still out and authorities are warning it may take many weeks before it comes back. with daylight, the extent

of the damage in puerto rico is becoming clear and it's obvious that many here have lost almost everything. federalfunding is going to be crucial to the rebuild here as this bankrupt island tries to pick itself back up after maria. president trump has authorised federal money to help places like catano and declared a major disaster across puerto rico. we are going to start the process now with puerto rico, we will have further updates on what is one of the most serious storms anyone has ever seen. president trump is now expected to visit the territory soon, but people here will be looking for more than just platitudes from him. this coastal community was one of the poorest in puerto rico long before hurricane maria struck. jobs are scarce here and people who are finding it tough on the heavily indebted island just saw it become much tougher. will grant, bbc news, catano, puerto rico. the united nations is to launch

an investigation into the massacre of yazidis, a minority religious community in iraq, by so—called islamic state. the security council voted unanimously to set up a unit which will gather evidence of crimes by is. the international lawyer, amal clooney, was at the un in new york, along with a yazidi who was captured but managed to escape. they've both been speaking to our correspondent lyse doucet. fleeing the savagery of so—called islamic state. this is iraq three years ago, in the mountains of sinjar. thousands of yazidis were slaughtered. thousands of women and young girls seized and kept as sex slaves. 24—year—old nadia was one of them. many in herfamily were killed by is. for the past year she and lawyer amal clooney have been pushing for an investigation into what the un calls genocide.

nadia murad, what does it mean for you today, for the yazidis? translation: it's a big day for us. ever since my community was subjugated by isis, we've dreamt about it. we want to see justice for the victims and to bring the perpetrators to trial. amal clooney, how big a step forward is this in legal terms? it's a huge step, lyse, it's really a milestone for the victims of isis, like nadia. what's happened today is that the council has voted to establish an international investigation to collect evidence of isis crimes. so for the first time the un is saying to isis terrorists that if they commit genocide, crimes against humanity and war crimes, they will be held to account in a court of law. how hard is it going to be to collect the evidence? you've been warning that the evidence was disappearing and witnesses were also disappearing. this is exactly why we've been saying this is urgent, witnesses are becoming

dispersed all over the globe. witnesses are sometimes more reluctant to give evidence after a long time. medical evidence disappears. mass graves have been contaminated. it was urgent for the council to take this action. they can do it. will this horrible chapter ever really be over for the yazidis given all that's happened ? translation: i went to visit my family home a few months ago, it was completely destroyed. isis had left nothing behind. it's going to be hard to forget but at least working now to bring those criminals to justice. at least that's something. a tiny victory. 0n the battlefields of iraq and syria, is's monstrous caliphate is grumbling. caliphate is crumbling. defeat is only a matter of time. justice will take far longer. and those who survived will never forget. lyse doucet, bbc news, new york. stay with us on bbc news, still to come:

bringing tv audiences closer to the wild and the wonderful for more than 50 years, sir david attenborough looks back at his broadcasting career. ben johnson, the fastest man on earth, is flying home to canada in disgrace. all the athletes should be clean going into the games. i'm just happy that justice is served. it is a simple fact that this morning, these people were in their homes. tonight, those homes have been burnt down by serbian soldiers and police. all the taliban positions along here have been strengthened, presumably in case the americans invade. it's no use having a secret service which cannot preserve its own secrets against the world.

and so, the british government has no option but to continue this action, even after any adverse judgement in australia. concorde had crossed the atlantic faster than any plane ever before, breaking the record by six minutes. this is bbc news. the latest headlines: donald trump steps up the pressure on north korea with more sanctions against companies who trade with pyongyang. the mexican president has promised to continue the search for survivors of tuesday's earthquake. he said rescuers were still looking for anyone alive in the ruins of ten buildings. the death toll has passed 270. more on our main news now. anthony ruggiero is a former treasury and state department

official on north korea sanctions, and now with the foundation for defence of democracies in washington. anthony, thank you forjoining us. this is another layer of sanctions on top of several layers that have come before. are these going to succeed where others have failed? thank you for having me. this is definitely another sanction that on top of north korea but it is really directed at those who do trade with north korea. so it really clarify is the question for them. are they willing to risk their trade with the united states for north korea? and it's crystal clear, if you do business with designated persons, or you do trade with north korea, you will lose your access to the united states financial system. and faced with a choice on iran, everyone

chose the us. does suggest that sanctions are more than a warning than a practical way of cutting off north korea's nuclear development? right. my sense is the document that we saw today, the executive order, had the elements that have already been provided to put them —— diplomatically and this is what has been described as the trump administration to different countries and warning that this was coming. and we saw some countries already cut off north korea trade, expel some of these ambassadors and diplomats, and now the trump administration felt it had to lay down this marker. certainly they have ample evidence of these activities already ongoing but the secretary of the treasury today made clear that they are starting today, there is a knowing provision, and if

you do this trade after today you could no longer claim that you didn't know. there is this worrying rhetoric between kim jong—un and donald trump, a kind of increasing tensions. is the language that donald trump has been using terribly helpful? there's always a danger of miscalculation here but we do have to keep in mind that north korea, you know, seven years ago a tactic naval vessel killing a0 south korean sailors. —— attacked a. there was really the retaliation for that and when you peel back the rhetoric on both sides are particularly on the us's side, the focus is on the us will destroy north korea but the first clause of the sentence was if north korea threatens the united states or its allies, then that would be the retaliation for that honour and it's important for north

korea to understand that, but they cannot engage in these publications without consequences. anthony, thank you for your time. thank you. the head of facebook, mark zuckerberg, says the company will give the us congress information about thousands of political adverts that were paid for by russians during last year's presidential election. he said he would work with others towards new standards of transparency for political advertising. in future, all such adverts will make it clear who paid for them. 0ur north america editorjon sopel has more from washington. it is significant. after the eu referendum, in britain, the phrase that gained currency was "post—truth". often, in the presidential election last year, it felt like we were going through "no truth." social media was awash with advertisements masquerading as serious news stories. they were invariably fake and they were also invariably in favour of donald trump and against hillary clinton. things like, "hillary clinton sold weapons to islamic state,"

"hillary clinton has had murdered her fbi officer involved in unmasking the e—mail enquiry," and also things like "in a surprise move, donald trump gains the backing of pope francis." now, all of this had an impact because at the end of the election, more people were reading the fake news stories, according to a survey, than the real news. under enormous pressure, facebook is going to show the transparency that it has often talked about and is going to reveal just where the source of those adverts came from, how much the russians paid, where they were all going. now, this will answer one question from the presidential election — the extent of russian involvement. the question it will not answer is what impact those fake news stories had on the electorate — that will still be hotly contested between the trump supporters, who will say it had no impact, and the hillary clinton supporters, who said it changed the election result. for more than half a century,

sir david attenborough has brought us a world of creatures and cultures that millions had never seen before. now to mark the republication of his zoo quest book, based on the original 1950s bbc television series, sir david has been talking to our arts editor will gompertz about his work in the early days, and how the world has changed since then. let me take you back to the mid—1950s... archive: this is the story of a search for a dragon. ..when a young david attenborough took his first tentative steps as a natural history programme maker. as he circled us, flicking out his great yellow tongue, savouring the smell of the goat's flesh, he looked almost as though he had walked out of some prehistoric age. gosh, look at that. now here we are, 60 years later at london zoo in the dragon house, named after the man who has become quite possibly the most respected broadcaster on planet earth.

david, the world and television has changed a lot since you first encountered one of those. yes, hugely. yes, when i encountered that, there were two networks in britain only. the bottom of the ferry grated on the white coral sand... i went to bali in 1956. i only saw one other european all the time i was in bali — which was several weeks, a couple of weeks. and we filmed dancing, and it was just marvellous. whoops, look at that! i mean that, that was great fun. it was the first time that that had ever been seen on television. yes. and it took us weeks to get there and get that filmed. and of course, the world was new. that's an example of it. i mean people... it wasn't the greatest film ever made, but nobody had ever seen that thing before. when i filmed that, there were only a third of the people on the planet. what is the effect, in your eyes,

of having three times as many people on the planet? well, everything is overcrowded. everything is overcrowded. and it's very difficult. the wilderness is under threat. looking at the oceans, and seeing a mother albatross come back after having scoured the antarctic ocean to feed this chick which she had been away from for weeks, and to bring back food. and she opens her beak and the chick begs the food and out comes what? plastic. no! that she has found floating on the ocean and has brought back and feeds her chick. that's heartbreaking. heartbreaking, yes. you're 91, so you're not as young as you once were. on a good day, how old do you feel in yourself? about a5, really.

yes, i think so, really. and i mean, look, this is luck, isn't it? this is just luck. jack and i set off wildly in pursuit. his luck is our good fortune. there are more programmes to come from this much—loved big beast of the broadcasting jungle. will gompertz, bbc news. a living legend. the world's richest woman, the l'0real cosmetics heiress liliane bettencourt has died at the age of 9a. she was worth an estimated $a0 billion. liliane bettencourt ran a philanthropic foundation. she once gave a billion euros worth of gifts to a society photographer. asked why she did, she's said to have replied "because he's worth it." that's all for now. you can get in touch with me and most of the team on twitter. i'm @bbcregedahmad. as one with a front clears away from

the uk and other one is on the way in on the day ahead, a day that sta rts in on the day ahead, a day that starts chilli and are largely clear skies, especially in rural spots, low single figures and a touch of frost on the cars and perhaps some spots in scotland all the way down to freezing as the day begins. the next with a system to start friday, it will push quickly, ran across northern island with a freshening wind. fringing in the western scotland. this is the picture across the uk at eight p.m.. away from the rain, it will be chilly but funny. bearing in mind there could be a few mist and fog patches. more in parts of england and wales and perhaps more widely in parts of east anglia and south—east england. we won't all see it but if you do, be aware it is

a possibility. it should not last too long in the morning. we watching the system come in, with morning in northern ireland but in the afternoon the rain pulls away and brightens up. when he threw the irish sea. at brokerframe put across scotland in the wales and western england, a few spots in the midlands, north—east england is the go through the afternoon but much of east anglia and south—east england will be dry. some sunny spells further east. temperatures to 19 degrees but quite cool you have the clout, the rain and the brisk wind. the weather system looks like its stalls across parts of england and wales going through friday with patchy light rain and drizzle but it does mean going into saturday morning it will be much more mild compared with friday morning. the big picture going into the weekend has a deep area of low pressure to the west of the uk, not too concerned about it, it's going north, but the trailing with the front looks like it will come in and ahead of it, quite windy pick over some of us across western areas during saturday. the wind will freshen with perhaps gales

developing. a lot of cloud and patchy rain to begin with on saturday, pushing northwards into southern scotland and the far north of scotla nd southern scotland and the far north of scotland should stay sunny. some sunny spells in northern ireland. brightening up nicely through wales in southern england through the day. some warmth in the southerly flow with the ridges up to around 20 or 21 celsius. the sunday, some uncertainty about the positioning of this area of rain coming in from the west. either side of it, sunny spells and the wind is easing. this is bbc news, the headlines: the united states has imposed new sanctions on north korea over its nuclear weapons programme. donald trump has signed an executive order aimed at preventing companies and banks from dealing with pyongyang. the president's decision comes ten days after the united nations announced its own measures. the mexican president has promised to continue the search for survivors of tuesday's earthquake. he said rescuers are still looking for anyone alive in the ruins of ten buildings.

over 270 people across central mexico are now known to have died in the quake. the prime minister of dominica says at least 15 people have been killed and 20 others are missing after hurricane maria struck the caribbean island on monday. the storm then hit puerto rico and is now heading northwards towards the turks & caicos islands and the bahamas. now on bbc news, panorama. africa's european dream. for people smugglers it's a £1 billion business. did you feel like a slave? i was a slave! this is land of slavery. now europe's under pressure to crack down, but at what cost? how many people here know someone who's died? will the migrant crisis ever end? i'm retracing the migrant trail from the shores of the mediterranean back to the heart of africa.

my journey starts five miles out at sea. every night the libyan coastguard patrol these waters, where smugglers launch migrant boats destined for europe.