welcome to bbc news, broadcasting to viewers in north america and around the globe. i'm reged ahmad. our top stories: donald trump invokes national emergency powers to fund the border wall with mexico. the democrats are furious. we are going to confront the national security crisis on our southern border, and we are going to do it one way or the other, we have to do it. five people are killed in a workplace shooting near chicago. police say the gunman has been shot dead. framily of the pregnant teenager who joined the islamic state group ask the british authorities to help bring her home, even if she faces prosecution. and, she shone a light on the black british experience. the author andrea levy dies at the age of 62. my my generation of black people in this country, there is always an

andrea levy book on bookshelves. before we begin we want to bring you breaking news. we have been hearing literally in the last few minutes that nigeria's electoral commission has announced it has postponed the presidential election by one week. that is just hours before voting was due to begin. those polls were due to open in a few hours. the commission chairman, yakub marmelo, has said that after a review of the logistical and operational requirements it is not feasible to proceed as scheduled. —— yakub mahmoud. you may know that there we re mahmoud. you may know that there were more than 70 candidates on the ballot, but the front—runners were the incumbent and his main rival. so

just repeating, nigeria's electoral commission has postponed the presidential election by one week, and that is just hours before voting was due to begin. 0f and that is just hours before voting was due to begin. of course we will keep you up—to—date with that story is more details come in. and of course, for all the rest of the details, you can go to our website. after weeks of speculation, president trump has defied his critics, and many in his own party, by declaring a national emergency. it means he can now bypass congress, to get the billions of dollars he says he needs to build a border wall with mexico. those funds will come from other government departments. but democrats have launched an investigation saying the move is unconstitutional, and they'll fight him all the way to the supreme court. 0ur north america editorjon sopel has more from washington. ladies and gentlemen, the president of the united states. donald trump had

an unpalatable choice. having not got a deal with congress, he was either going to have to admit failure on funding his wall with mexico, his signature campaign pledge, or he was going to have to go nuclear. he chose nuclear. this was now a national emergency on the southern border. we're going to be signing, today, and registering, national emergency. and — it's a great thing to do, because we have an invasion of drugs, invasion of gangs, invasion people, and it's unacceptable. watched by relatives who have had family members killed by illegal immigrants, the president rode roughshod over the powers of lawmakers to set budgets and to set up a confrontation with congress that he fully recognises is likely to end up in the courts. we will have a national emergency and we will then be sued and they will sue us in the ninth circuit, even though it shouldn't be there. and we will possibly get a bad ruling and then we will get another bad ruling, and then we ‘ll end up in the supreme court.

and all the time the courts are deliberating it means there will be no substantial building work taking place. less building a wall than hitting one. but here's the problem. there's a lot of of fencing and structures — but there are places where itjust ends, so people like his mother and child from guatemala just can walk round it. "my little girl is hungry," she says, "and i don't have any money." in recent years, the number of illegal immigrants trying to enter the us has been in decline. and most of the drugs that enter the country from mexico come from legal crossing points — like this one. but a lot of border patrol officers who backed the president's call for a wall make this point about the problem subsiding. i would say is‘s nothing like it was. i would say that it's changed. but that is the equivalent of saying your house is only getting robbed one day out of the week now, instead of all seven, then you're done.

we're not done. back in washington, the democrats are considering their next move. it's hard to believe they won't challenge this. president trump couldn't convince mexico, he couldn't convince the american people, he couldn't their elected representatives to pay for his ineffective and expensive wall. make no mistake, congress will defend our constitutional authorities in every way that we can. donald trump's signature is now on this declaration. there are many on both sides of the divide who question how much of a national emergency this really is. and it won't be lost on them that on day one of the emergency the president flew off to his golf course in florida, not the border with mexico. jon sopel, bbc news, in washington. let's speak to the bbc‘s chris buckler, who's in washington dc. chris, can congress stop donald

trump from doing this? or is it really going to end up in the supreme court? technically congress could, but with a republican—controlled senate it does seem unlikely that it is going to end up with congress making the final decision here. and stopping the president. even though some republicans are deeply unsure of this move. as a result i do think we are going to end up in legal action. in fact it has already been suggested that will begin next week, with the aclu saying that they will file a legal case next week. already, as you heard from president trump, he expects this to go beyond just one court. he expects it to be fought all the way to the supreme court. this could be fought right up to and during the 2020 campaign. all right, chris buckler in washington, thank you very much further. —— for that. a gunman has opened fire at an industrial park near the us city of chicago, killing at least five people. several others, including police officers, were injured

in the attack, in the suburb of aurora. the gunman, named as 45—year—old gary martin, was shot dead. he is believed to have worked at the site. bob smith is daily herald dupage county editor, and is covering the story locally. hejoins us now. thank you for your time. how much do you know about what happened? well, what we know is that police were called to the scene at almost two o'clock this afternoon, chicago time. the first officers on the scene arrived and the gunman immediately opened fire on them. a swat tea m immediately opened fire on them. a swat team was later called and engaged in gunfire with mr martin and shot him dead. five people were killed inside the building, and five police officers were wounded in the shootout. how unusual and incidents like this is, for aurora? aurora has

a history of some shootings, but nothing like this. mostly gang—related shootings, but not that many. and this is very, very unusual for this area. we are hearing that the shooter probably worked at this place, at the site, and we are hearing a lot of stories about people who recognised him, who were able to escape? yeah, we have heard the same thing. 0ur able to escape? yeah, we have heard the same thing. our latest understanding, and there is going to be another press conference in an hour which will more fully explain what happened, but what we have heard is that he was actually fired from this business about two weeks ago, or at least put on leave, and had come back today to learn that he was being fired, and then pulled out a gun and began shooting. do you think and incidents like this might reignite the gun control debate is

in the state, if not the country? you know, it already has, already some of our local politicians are talking about the need for greater gun control. so, yes, it definitely will. and, you know, we are coming off, just a day or two, of the anniversary of the parkland shootings. so this is going to raise that issue once again, i'm sure. and given this kind of shooting is relatively rare for aurora, what kind of community reaction have you been getting? i believe there will been getting? i believe there will bea been getting? i believe there will be a lot of church services, we are hearing blood banks are expecting a lot of people to be donating, and i am sure there will be some rallies in the coming days to talk about gun violence. bob smith, thank you very much for that. you are welcome, thank you. let's get some of the day's other news. the turkish president, recep tayyip erdogan, says his country is determined to take the investigation into the killing of the saudi

journalist jamal khashoggi to an international court. mr erdogan said turkey had not so far disclosed all the documents and information it had concerning the killing, but would deliver them to investigators. the body of the argentinian football player, emiliano sala, has arrived back in his home country ahead of his funeral on saturday. the 28—year—old died after the plane he was flying in crashed into the sea between france and britain as he was travelling to his new club, cardiff city. two men have been arrested by airport authorities in hong kong for allegedly smuggling a record number of suspected rhino horns worth $1 million. the men were on their way to vietnam from south africa. it comes just two weeks after a seizure of eight tons of pangolin scales and more than 1,000 elephant tusks. relatives of a teenager from london who went to join so—called islamic state have asked the british government to help them bring her home. the family of shamima begum, who was 15 years old when she left

the uk, said they understood she would be investigated and they welcomed that. there's also a new warning from the head of britain's intelligence agency, mi6, that thejihadists still pose a threat. daniel sandford has more. inside the al—hol camp in northern syria, the women and children fleeing the fighting in one of the last strongholds of the islamic state group. this is where the former bethnal green schoolgirl shamima begum is. her family had lost all hope of seeing her again. and tonight, in a statement, they asked the british government to help them to return her, along with her unborn baby. "as a british citizen," they said, "shamima has every expectation to be returned to the uk and be dealt with under the british justice system." "shamima's child, who will also be british, has every right,

as a total innocent, to have the chance to grow up in the peace and security of this home." they said they would welcome the police investigating her, something that is inevitable if she returns. we have to be clear that people who leave this country to support that regime are people who, if they do return, have to answer for their actions. some 850 people left the uk to join is and around half have already come back. today alex younger, the head of the secret intelligence service, mi6, warned that at least some returnees will pose a risk. "experience tells us that once someone puts themselves in that sort of position they are likely to have acquired the skills and connections that make them potentially ver the home secretary said this morning that he would prevent those involved in terrorist organisations returning to britain. but what does that mean for shamima begum, who left the uk as a schoolgirl? could she have her citizenship taken away? if she doesn't have another nationality, as i believe to be

the case, then it is morally unacceptable to refuse her entry — as well as legally unacceptable. because otherwise she would be stateless. and no person in the world can be stateless under the law. her family said they were shocked to hear her say she didn't regret going to is. they explain it by suggesting that she was groomed at the age of 15 and might have been wary of what she was saying in a camp surrounded by is sympathisers. and rashad ali, who is an expert in de—radicalisation, says is supporters can be turned round. we know in the uk we have worked over the last ten years with fairly hard—line violent extremists who have renounced their ideology, have remorse for their actions, and have taken part, actually, in helping others move away from extremist tendencies and violent ideologies. the kurdish red crescent says there are around 1000 new arrivals at al—holjust this morning.

decisions will have to be made soon about what to do with the british is supporters among them. daniel sandford, bbc news. stay with us on bbc news, still to come: making their voices heard — children from across britain skip school to protest about climate change. nine years and 15,000 deaths after going into afghanistan, the last soviet troops were finally coming home. the withdrawal completed in good order, but the army defeated in the task it had been sent to perform. malcolm has been murdered. it has a terrible effect on the morale of the people, i'm terrified of the repercussions in the streets. one wonders who is next. as the airlift got under way,

there was no letup in the eruption itself. lava streams from a vent low in the crater flowed down to the sea on the east of the island, away from the town for the time being, but it could start flowing again at any time. the russians heralded their new generation space station with a spectacular night launch. they've called it mir, the russian for peace. this is bbc news, the latest headlines: donald trump invokes national emergency powers to fund the border wall with mexico. the democrats accuse him of an abuse of power. let's stay with that top story now. sarah kinosian is a freelance journalist in tijuana,

mexico and is writing a story for the washington post from the border. thank you for your time. donald trump talks about their being a national emergency on the border in order to justify the latest move. is there a national emergency from what you can see? no, there is no national emergency. he says, i mean immigration is overall at our time low, he says people are bringing drugs and immigrants are flooding over the border. in actuality drugs are coming through ports of entry, there are some problems at the border now, but those are problems that have been created by this administration largely. in terms of long wait times for immigrants that keep arriving, more and more we are seeing families arrive at the

border, many of whom are trying to seek asylum. for many people who saw the pictures of what is described as a caravan of people walking through mexico and seeing pictures of what is happening on the border, is understandable some inside the united states to see it as an emergency because they are being confronted with those numbers? emergency because they are being confronted with those number57m actuality, you know, the thing with the caravan is that it took a lot of immigration that was happening piecemeal and it put it all in one sort of trip. peopled just travel in ca rava ns sort of trip. peopled just travel in caravans because it is much safer to travel in caravans, it is a lot cheaper to travel in caravans, but when you look at the overall numbers of immigration, they are actually at the lowest they have been, especially from their peak in the late 1990s and early 2000. our

people who you are speaking to either seeking asylum or seeking to cross over into north america by other means, do they hear about this national emergency and what donald trump is trying to do, and that discourage them at all? people in my experience do not follow every little piece of news, and especially when it is the thing thatjust hits. but they are on facebook so they see it, and they know that donald trump doesn't want us. but they basically say that they are willing to give it every chance they have for a better life, and they know that the united states is not particularly open right now, but, you know, giving it a try is our best chance, it is better than staying at home and knowing that nothing will improve. and so i think everyone is still willing to roll the dice, despite the discourse. many of these people,

there are various reasons why they are coming, but they also have family members that are in the united states, they are fleeing violence, fleeing poverty, and so this is their best shot at seeking a better life. the view from tijuana, thank you. schoolchildren across the uk have been taking part in a day of protests, calling for action on climate change. 0rganisers say pupils walked out of schools in more than 60 towns and cities, to highlight what they see as a lack of action by the government. frankie mccamley reports. we are angry that the government's not doing anything, but we also see it as important to fight for ourfutures. to all the politicians, listen to what we have to say. you failed at saving your own future, so now can you try and save ours? there's no time to rest. we have to do something to save the planet. chanting: this is what democracy looks like! different voices, one clear message.

today was a day led by the children, for the children and their future. thousands campaigned in dozens of protests across the country. they say you don't have a voice! a call for action in sheffield... what do we want? climate action! chanting in ullapool. .. marching in brighton... a real sense of urgency in cardiff and, in manchester, there was music. # born to love in everyone... before nine—year—old lilia had her say. i'm worried about climate change because of the animals. would you like it if your home was disappearing in front of your eyes? this is clearly the first time many of these pupils have ever walked out of school and, just by looking at the age of some of these, the first time they've ever been on a protest, but their message is clear. they want to protect the future of the planet and safeguard their future. the action is part of a much wider global movement,

inspired by 16—year—old greta thunberg from sweden. she's been striking from school every friday, calling on her government to lower its carbon footprint. you are not mature enough to tell it like it is. even that burden you leave to us children. her persistence later sparked protests across the world — from australia to belgium and ireland earlier this week. the government has said today's protests are a waste of lesson time and increasing teachers' workload, but the threat of school disciplinary action pales in significance to the danger these youngsters think the planet is under from climate change. frankie mccamley, bbc news, manchester. the american footballer colin kaepernick has reached an out—of—court settlement in his legal case against the national football league. kaepernick has argued that nfl club owners conspired not to hire him because he protested against racism and police brutality by taking a knee during the national anthem.

he opted out of his contract with the san francisco 49ers and since launching his grievance against the league in 2017 — has been unable to find a new team. there are no details of the resolution as it's subject to a confidentiality agreement. the award winning british author andrea levy has died. she was 62 and had been receiving treatment for breast cancer. the daughter of windrush generation parents who came to britain from jamaica in the late 1940s, her books chronicled the highs and lows of the black british experience, most notably in her celebrated work, small island. lizo mzimba looks back at her life. archive: the empire windrush brings to britain 500 jamaicans... in 19118, andrea levy's father arrived on the empire windrush. it was the inspiration for her novel which charting the hopes and struggles of a generation, small island. it went on to win multiple awards

and be adapted for tv and the stage. when it first came out, you know, i sort of said to the publicist, "just give me a basket, i'll take it door—to—door". i really thought nobody was going to be interested. you think your white skin makes you better than me, don't you? we both finished fighting a war for a better world. we was on the same side. if anybody wants to have a look at how the windrush generation arrived here, and how we, the sons and daughters of the windrush generation, survived and are surviving, they have to refer to andrea's work. that's why, for my generation of black people in this country, there's always a andrea levy book on our bookshelves. andrea levy had grown up in london, and in her 30s had begun to write. her work was driven by her own curiosity

about where she'd come from. it was a story that eventually took her back to britain's role in the caribbean slave trade. for every one slave who went to america, 12 went to the caribbean. it was massive — it was massive. i have seen books on british history that don't mention slavery, you know, and you just sort of... it beggars belief. the character she created was a house slave who bore a child to an estate master and then later, she discovered that that was the story of her own great—great—grandmother. andrea levy, an author whose life and work was rooted in the story across generations of two small islands, britain and jamaica. we wa nt

we want to remind you of our breaking news this hour. we have been hearing that nigeria's electoral commission has postponed the presidential election by a week, just four hours was due to begin. many people in the country said —— had prepared to go to the polls in a few hours. the commission chairman yakub mahmood said that, after a review of the logistic and operational requirements, it was "not feasible" to proceed as scheduled. he said it was a difficult decision, but necessary to ensure a free and fair vote. there were more than 70 people on the ballot, but there were two main

front—runners. president buhari faced a challenge from the opposition leader atiku abubakar. let's get more on that breaking news. let's speak to our correspondent in yola, nigeria, mayenijones. was this expected at all? no, it was not. people had thought that if there was going to be a postponement, it would have been announced before the day of the election. this has come as a surprise, a number of people have moved to the places where are they are registered to vote, their home towns, people in lagos were travelling in their thousands, this is going to be incredibly disruptive to people when they wake up in the morning and they find out that elections will not take place today. can you give us more information on the reasons that the total

commission gave for this extraordinary move? rumours have been swelling but nothing concrete came through, and at the last that it was announced that the electoral commission was having this emergency meeting, when the announcements came the chairman of the electra commission did not give many details, he said there was logistical issues out of his control and they were unable to overcome them, and for that reason they had to postpone the elections. there we re to postpone the elections. there were issues in the weeks coming up to the elections, polling units had been set on fire, card readers were also set on fire. this may have contributed to the reasons for the postponement, but tonight the chairman was not able to tell us anything, he said he would update the nigerian people later on saturday. it is africa's largest democracy, have you seen anything like this before in the country's history, to compare cancelling the

boat literally hours before it is set to go ahead? unfortunately nigeria is no stranger to postponements, in 2015 the vote had been postponed although this was done several weeks before the day of the elections, but in 2011 the postponement came at the very last minute actually, the day of the vote itself, and actually was postponed twice, postponed to the next day and then postponed by a week on the next day. importa ntly this then postponed by a week on the next day. importantly this is something that nigerian voters are used to, after the 2015 elections that were considered to be quite successful, many people thought we had moved beyond this, but it seems that the literal commission for one reason or another was not able to undertake the, frankly speaking, huge logistical challenge that it needs to organise this election, 84 million registered voters, a huge swathe of territory, some parts of the country are very hard to reach, especially in the north—east where

there are attacks by boko haram, lidded —— the logistics are difficult but people for this announcement could have come earlier. presumably campaigners and voters are earlier. presumably campaigners and voters a re not earlier. presumably campaigners and voters are not going to be thrilled by this decision, what kind of reaction do you anticipate we will see? the main opposition party, the people's democratic party had already expressed concerns at how free and fair this poll was going to be, so it is very likely that they will see this postponement as a way that the leading party of government is trying to allay the poll, to read them in some way there is no evidence of this and the electoral commission had said it was putting every thing in place to make sure the vote was not rigged, including using voter id cards with pictures and biometric information on it. there are fears this will be an indication of some sort of ridding, —— rigging, it might lead to

discontent, elections in nigeria in the past had been quite violent when postponements were announced, so we will be watching anguish —— anxiously to see what happens in the morning when people wake up and see the news. all right, thank you so much for your time, let's the news. all right, thank you so much foryourtime, let'sjust remind you of that breaking news this hour. nigeria's electoral commission has postponed the presidential election by a week. voting was due to take place in just a few hours those polled have been cancelled but have been postponed by one week, and that commission chairman mahmood yakubu said after the —— review of the logistic and operational requirements it was not feasible to proceed as scheduled. 0f course all of the latest details are on our website.