welcome to bbc news, i'm mike embley. our top stories: chinese authorities impose further travel restrictions in hubei province, where a previously unknown respiratory virus has killed 25 people. day two of the us senate hearing the case against president trump in the impeachment trial, as he mocks the idea of trading witnesses. world leaders join holocaust survivors to mark 75 years after the liberation of the nazi death camp at auschwitz. humanity is closer to annihilation than ever before — scientists alter the doomsday clock due to concerns over climate change and global tensions.

hello to you. the chinese authorities are taking drastic action to try to stop the spread of the new coronavirus. they've imposed a travel shutdown on several cities, including wuhan, where the virus was first discovered. 25 people have been killed by the virus in china, that's up from 18 in the past few hours. but the world health organization has said it is not yet a global health emergency. john sudworth reports from beijing. this is the moment a city of 11 million people was effectively shut off. pa ramilita ry police guarding the station, as all departing trains are cancelled. in the hospitals, medical staff in full bodysuits are treating hundreds of infected patients.

while images on social media appear to show a system struggling to cope. empty shelves in the shops and scuffles over food. we spoke to one british man now stuck inside wuhan. it's a very surreal feeling. you know, knowing especially that if you go outside, there is potential to catch such a deadly virus. and when you look outside the window, what's the atmosphere like? does it feel like a city under a blanket of fear? oh, yeah, 100%, 100%. behind me, if you saw the street at night time where i normally live, it's a very vibrant street, lots of restaurants, and it's open until 2am and chinese families come and they're celebrating, but if i show you out there now, it's dead. on china's main evening news, the lead item? a new year banquet for senior officials.

president xijingping makes no mention of the crisis. but the facemasks on display at this beijing station are proof the public is well aware of the risks. yeah, a little worried, because, you know, i... you're wearing your mask? yeah, a mask. and this one. goggles as well. are you worried about the virus? no, because i believe in my country and my government. you believe in your government? yes. this is an epidemiologist‘s nightmare — how do you control the spread of a dangerous virus during the biggest movement of people on the planet? tens of millions travelling every day for at least a fortnight, and the real question is whether the closure of the city

of wuhan comes far too late to make a difference. alongside the public health announcements, there are signs of censorship and control, and questions are being asked whether more might have been done sooner. john sudworth, bbc news, beijing. with more on this, let'sjoin professor michael baker from the department of public health at the university of otago, wellington. thanks very much your time. how would you compare this to, say, regular seasonal flu or indeed the coronavirus that caused the sars outbreak back in 2003? yes, good evening. this is very comparable to the sars event. so you got a new virus are jumping the species barrier from a live animal market and then becoming person to person spread and resulting in quite a serious illness. so very comparable. it's different from seasonal influenza because that virus is something we

have encountered before, so the population has some immunity to it. so how concerned are you? population has some immunity to it. so how concerned are you ?|j population has some immunity to it. so how concerned are you? i think very concerned. the three things we wa nt to very concerned. the three things we want to know about a new, emerging disease is how serious, how transmissible and how controllable. we know this is a serious illness, particularly for older people, with a3%or particularly for older people, with a3% or4% particularly for older people, with a 3% or4% or particularly for older people, with a 3% or 4% or greater mortality risk, probably about 25% of people in hospital. it's clearly quite transmissible and people have come up transmissible and people have come up with an estimate of its reproduction number, thing it in a similar range to influenza, we don't know yet how controllable it is, and that's why i think we see maximum effort from china at the moment to limit the spread. why do you think then that the world health organization has not declared a global health emergency? do you think it is still quite likely that they will? i think there's a fairly good chance they will at some point. basically they said in the statement

they put out yesterday, which was quite interesting, the fact they took two days to come to a decision suggests they were quite divided and in the end they felt a more nuanced level was needed, an intermediate level was needed, an intermediate level of risk, and declaring a public health emergency at the moment might not reflect that. they basically want more information and they are very supportive of china taking major measures to contain this. yes, what do you think of the measures and so far put in place? i measures and so far put in place? ,ata measures and so far put in place? , at a distance, they look really draconian but you're faced with the reality of 20 million people or more around wuhan, who have been exposed. it is very hard for them to do individualised control measures we might consider in a place like new zealand or the uk, so they arejust using a mass approach to try to dampen down transmission. if they can push what's called the reproduction number, the number of secondary reproduction number, the number of secondary cases reproduction number, the number of secondary cases you get from an average case, down below one or towards one, they may be successful in limiting or preventing further

transmission. when you're talking informally with your colleagues, what are you saying about this? where do you expect this to go next? what we will see is a lot more cases in china. one thing that happens early in an emerging disease is all the information we have is very historic. we are looking at transmission ten days or maybe two weeks ago and then you got an incubation period, people have to get sick enough to go to a hospital and if they're going to die, u nfortu nately and if they're going to die, unfortunately it and if they're going to die, u nfortu nately it ta kes and if they're going to die, unfortunately it takes maybe a few more days. a lot of that data is really quite out of date now and that's really just the really quite out of date now and that's reallyjust the biology we are looking at. i would expect to see a lot more cases in china and a lot more cases appearing overseas. the unknown is whether those cases overseas will also start chains of transmission. that's what we are all looking out for at the moment. professor baker, thanks very much and. thank you. the us senate has been hearing a second day of arguments in the impeachment trial of president trump. democrats are making the case that mr trump abused his power

by using american military aid to pressure ukraine into helping him discredit his political rival, joe biden. jerry nadler, one of the democrats' prosecutors, said mr trump's attempt to cheat his way to victory in the presidential election later this year was an abuse of power that threatens the entire system of us democracy. here's the top democrat in the senate making the case. the same republicans are saying that they heard nothing new, but these republicans voted nine times on tuesday against amendments to ensure new witnesses and new documents to come before the senate. let me repeat — the same republicans saying they "heard nothing new" just voted nine times on tuesday to hear nothing new. the bbc‘s chris buckler is in washington. he told me the latest. yeah, inside the senate, the democrats are putting out their case against this first charge against president trump — that he abused his power and his position as president. you get the impression while this is all happening in a pretty staid

environment inside the senate chamber, behind—the—scenes there's plenty of conversations going on, with republicans and democrats talking about their strategy is going to be in this and whether or not witnesses will come forward. that's something they're not just talking about, it's also president trump as well, because democrats basically want to introduce as much new information as they can. they'd like to have people subpoenaed and brought to the chamber in order to give evidence, not least the likes of the former national security adviser to president trump, john bolton, who left under a bit of a cloud and who apparently made a number of comments about president trump's behaviour as regards to this push for ukraine to launch investigations into his political rivals. in return, there are suggestions republicans would like to have the likes of hunter biden come to give evidence. that is the son ofjoe biden, someone who had business dealings in the ukraine and frankly was making a huge amount of money there, and president trump has made unfounded allegations time and time again that there may have been corruption involved in all of that.

he's denied that, but he's certainly picked up on this idea of a witness trade of some description. he's tweeted today, "the democrats don't want a witness trade because shifty schiff...", that's adam schiff, the lead impeachment manager, "..the bidens, the fake whistleblower, the second whistleblower, the so—called ‘informer‘ and many other democrat disasters would be a big problem for them." it's the president striking back, and actually he's been doing what he can outside of the chamber to disparage these whole proceedings, even describing them as boring. chris buckler there for us. israel's prime minister has vowed that there will not be another holocaust. benjamin netanyahu was speaking injerusalem as world leaders and holocaust survivors marked 75 years since the liberation of auschwitz. israeli officials say the event is the biggest international gathering in the country's history. our middle east correspondent, orla guerin, reports. frail but determined, holocaust survivors coming to honour those who perished, lighting a memorial flame for the six million jews annihilated by the nazis.

among those gathered on jeruselam's mount of rememberance, heads of state, prime ministers and princes. pledging to combat an enduring threat, the dark shadow of anti—semitism. and here is its incomprehensible expression. auschwitz, the gates of hell. the nazis killed more than a million people in this one camp before it was liberated by the red army. for many, auschwitz is the ultimate symbol of evil. it is certainly that. israel's prime minister used this platform to call for global action against iran, saying it wanted to develop a nuclear weapon

to destroy the jewish state. they threaten the peace and security of everyone in the middle east and everyone beyond. i call on all governments to join the vital effort of confronting iran. the music was a haunting echo from the past. it was composed by viktor ullmann. he was sent to auschwitz and died in the gas chambers. from prince charles, whose grandmother, princess alice, saved a jewish family, a call for mutual understanding. the lessons of the holocaust are searingly relevant to this day on this day, in this place, and in memory of the millions who perished in the shoah,

let us recommit ourselves to tolerance and respect. as this anniversary is marked here at yad vashem, jewish officials want to send an urgent warning. they say violent acts of anti—semitism are on the rise and thejewish life is once again under threat in europe. they insist the world's duty to remember is more crucial now than ever. still bearing witness at almost 90 years old, holocaust survivor naftali deutsch. he recited the mourner‘s prayer, the kaddish. the vow here today, never again. orla guerin, bbc news, jerusalem.

the united states is tightening visa restrictions to stamp out what the trump administration calls birth tourism. from friday pregnant women applying for visitor visas will have to prove they have a reason for going to the country, other than giving birth as anyone born in america gets citizenship. sergio gonzales is deputy director of the immigration hub and former senior policy advisor to us senator kamala harris. the trump administration wants to restrict immigration. they would say it has the right to use any tool available, doesn't it? u nfortu nately we've available, doesn't it? unfortunately we've seen a lot of hideous attacks by this administration to use any tool they can to reduce immigration, including those seeking asylum at our southern border and unfortunately in that agenda they really implemented some of the most terrible policies that

are discriminatory in nature, and this is one of the worst examples of that. essentially what the new regulation will do is allow the administration to deny entry to women and girls and consular offices for tourism and business if they are not presumed to be pregnant. essentially what this will mean is the profiling of women's bodies from entering the united states if a consular officer believes that woman is pregnant. and it is possible, i know we are hearing from some people, that if a woman is deemed to be overweight, she might have to prove that she is not pregnant? exactly. ina lot exactly. in a lot of instances, this is going to bea in a lot of instances, this is going to be a humiliating prospect almost something you would think of in a dystopian future for women, who have to go into an office in a public setting and have an officer who has no idea who this woman is believed that based on that woman's size, based on her body, she might be

pregnant and then make that woman prove potentially through some sort of test in that setting that she is indeed not pregnant. as i said before, this administration has really implemented some of the most draconian immigration policies, anti—immigrant policies, i think that we've seen in our nation's history, whether or not we're separating kids from their families. this is another disturbing example that isn't just about this is another disturbing example that isn'tjust about immigrant rights but also about women's rights and women's rights to their own bodies. do we know how consular officials feel about having to police reproduction and women's bodies in general? you know, we don't know that but we do know that this is certainly not.. for people who are hired to be consular officers, they are not medical professionals. this is not an area of their expertise, their background or training. to turn them into policemen basically

around women's bodies and what amounts to a health issue is very disturbing, andi amounts to a health issue is very disturbing, and i think can have some disastrous consequences. and yet you know an awful lot of people voted for president trump, they voted for him to restrict immigration probably by any means necessary , immigration probably by any means necessary, what would you say to them? well, i would actually disagree with that. the vast majority of americans disapprove of president trump's immigration policies. we saw that in 2018, president trump tried to use the same playbook that he used in his own election in 2016, and in the 2018 mid—term elections, republicans got trounced, and president trump really try to scare americans with the threat of a caravan coming across the southern border, and it actually backfired. and we know that today, americans support immigrants

coming to the united states, they support dreamers and daca recipients, the programme that allows young people who are in this country and were brought to this country and were brought to this country by their parents stay here. they support allowing those people to stay here and become citizens. they support legalising undocumented citizens in this country. and so i think this is going to backfire on the administration, and i certainly think that the majority of americans do not end with president trump when it comes to the issue of immigration. thank you very much. stay with us on bbc news. still to come: a portrait of a potter as a young man. the new grayson perry retrospective. donald trump is now the 45th president of the united states. he was sworn in before several hundred thousand people on the steps of capitol hill in washington. it's going to be only america first — america first.

demonstrators waiting for mike gatting and his rebel cricket team were attacked with tear gas and set upon by police dogs. anti—apartheid campaigners say they will carry on the protests throughout the tour. they called him ‘the butcher of lyon'. klaus altmann is being held on a fraud charge in bolivia. the west germans want to extradite him for crimes committed in wartime france. there, he was the gestapo chief klaus barbie. millions came to bathe as close as possible to this spot, a tide of humanity that's believed by officials to have broken all records. this is bbc news. the latest headlines: severe travel restrictions have been imposed in more cities across the chinese province of hubei, which is at the centre of an outbreak of a new virus that

has killed 25 people. the us senate has been hearing a second day of arguments in the impeachment trial of president trump. climate change, global tensions — the world does seem to be in a more perilous state than before, and scientists behind the so—called doomsday clock say that is no false impression. the time has moved tojust 100 seconds to midnight after experts altered the clock due to the state of world affairs. the clock now stands at its closest to doomsday since it began ticking in 19117. rachel bronson is president and ceo of the bulletin of atomic scientists, and she told me why they thought it was necessary to move it closer to midnight. we are very concerned. we're moving the clock towards midnight. it's the closest it's ever been. we're very concerned about the issues of nuclear risk and climate change, both trending in the wrong direction, in terms of safety and security. but there's a really important segue from your last guest to this discussion, which is one of the things we call out, are not only are those

trends getting worse, but the international capacity to deal with these major global issues is crumbling, and we're really concerned about our ability to handle these big challenges. and the previous conversation on the coronavirus fits right into it, actually — that they're struggling with the same kind of issues. so what needs to change, to take the clock further from midnight? so we need to look at the things we can do independently, the things we can do on nuclear issues, like continue to advocate for a continuation of the arms control agreement new start, reduce the kinds of investments that are going into nuclear weapons. but what — broadly, across all of them is we need to reengage at the international level to find new mechanisms to reduce these threat. these are big global challenges, that require big global solutions.

and instead, what we're seeing is countries, led by the united states, but other countries as well, walking away from international agreements, international solutions to these big challenges. and that's one thing that we really can advocate for, here in the us and globally. the clock is obviously a visual representation of how concerned you are, how concerned we should all be. you must be aware a lot of people, especially young people, are very, very anxious about climate. a lot of people feeling, well, there isn't much i can do about this. so are you just ramping up people's concerns, without offering a way through? no, i don't think that's true at all. i think what we're doing is reflecting that anxiety out there, and what we're trying to show is that you're not alone in thinking that things are getting worse, and that we need urgent attention to it. in fact, our leading science and security experts fully agree agree with that. and what we're trying to say, actually, is to point out, and we do in our report,

that what we're seeing in the climate space, and the public‘s engagement around it, and the kind of youth movements that we're seeing pushing this issue into the political discussion and into political platforms globally, is having an effect. we don't think that we're responding as quickly as we need to be, but we do call that out as a bright spot, and we would like to see the same thing happen in the nuclear space, as well. so hopefully what this does is for those who are out there, you know, on the streets, wondering if anyone's listening — we're listening. we see that, and we're supporting those efforts, because we agree. things are not getting better, and our leaders aren't taking care of us the way we thought that they were. two years ago, a british museum made a public appeal asking anyone who owned an early ceramic work by the artist grayson perry to make contact. the response led to hundreds of long lost pieces being identified, 80 of which have been assembled for a special exhibition. the turner prize—winning artist, who describes himself as a transvestite potter gave our arts editor will gompertz a guided tour of his formative work.

it must be quite moving to come and look at your past work like this. that's true, it's — that's the first... when i came in here, i sort of drew breath, because suddenly i was confronted by all these works. i hadn't seen many of them for decades and decades, since i sold them. and yeah, i'm looking at the young me, and as i'm now post—therapy, i'm looking at him with compassion. you know, i was very angry and, you know, at the mercy of the internal winds of my emotional weather, let's just say. and people thought in this early work that it was deliberately, ironically bad. but no — i have to tell you, i am genuinely inept. in this exhibition is literally the first plate that i made in evening classes in 1983, and i put it in an exhibition. you know, the fact that i embraced my own ineptitude was very important. it took until i won the turner prize for people to sort of drop

their snobbery about it being just a load of pots. you know, i was amazed at how long that went on. and i thought, that's funny, you know, you can bring a urinal or a shark into an art gallery and it's this amazing, you know, brave conceptual move. but, if you brought a pot into an art gallery, somehow it was sort of the pretentious next—door neighbour of art. what comes through these pots and plates, grayson, time and time and time again, is this sense of humour running right through. i think that humour is often dismissed as light and entertaining, when in fact i think it's one of the most profound qualities that we possess as human beings — the ability to laugh and to make jokes. i've always used humour, and as i get older, i see it more. i'm more moved by it now, you know, the fact we have this amazing ability to reframe the tragedy and struggles and toils of life. and, you know, the darker it is, the more we laugh, quite often. you know, we laugh

in the face of death. our arts editor will gompertz talking to grayson perry. that's it for now. thank you so much for watching. hello. six hours of sunshine in sheffield on thursday. much of the uk couldn't even manage six seconds of blue sky, with scenes like this. there are weather changes at the end of the weekend, high at the end of the weekend, pressure over the weei eventually high pressure over the weekend will eventually give way to this weather front which on sunday is going to bring rain south across the uk, with a colder, brighter, showery air mass following on behind. let's take a look at how friday starts, though, and we've got the cloud. with the cloud, we are for the most part frost free. there's missed, there is fog, particularly into parts of england and wales. it is damp, it's drizzly in places. there are some outbreaks of rain close to the north coast of northern ireland that will

run northwards across mostly the western side of scotland during the day. which means eventually increasing cloud after early brightness in north—east scotland. still some sunny spells north—east england, brightens up a bit in northern ireland, glimmers of brightness the channel islands. the far south coast of england maybe one or two spots, in north of wales. but we're talking about the exceptions to what is overall a cloudy story, and continues to be overnight into saturday morning. still drizzly in places, still some areas of poor visibility, but still with temperatures not going down to far overnight, with a blanket of cloud. the weather front is just slowly getting closer to north—west scotla nd getting closer to north—west scotland on saturday, but ahead of that, it's still another day of cloud, drizzle. there is a sign we may just see something cloud, drizzle. there is a sign we mayjust see something brighter running up especially the eastern side of england during the day. at the same time, a few showers running into what western england and wales. northern ireland, and rain heading into the western isles. it may be a little bit brighter, a bit easier on saturday, all ahead of this weather front, which finally going into sunday starts the mood southwards.

but with clearly a colder air mass following on behind. but within that, brighter skies. you only get those, though, if you see the rain clear on sunday, and that won't be across the eastern side of the uk. so it is moving south—east, the rain, so it is early on towards the north—west will brighten up. later on in the south—east thing stay grey and cloudy and damp into the afternoon here. it's a breezy day across the uk. it turns colder behind the rain. yes, brighter, but a few showers arriving as well. in amongst, a big change in our weather into the start of next week, dominated by low pressure.

this is bbc news, the headlines: authorities in china have imposed strict travel restrictions in more cities across the province of hubei, which is at the centre of an outbreak of a new coronavirus that's killed twenty—five people. the number of chinese patients suffering from the illness has risen to 830. all large scale holiday celebrations have been cancelled in beijing. the us senate has been hearing the second day of arguments in the impeachment trial of president trump. democrats are making the case that mr trump abused his power by using american military aid to pressure ukraine into helping him discredit his political rivaljoe biden. it's now clear at least 13 people have been killed in the storms that have ravaged parts of spain. four people are still missing. storm gloria has triggered floods and swept away roads. prime minister pedro sanchez has flown over some

of the worst hit areas. now on bbc news, panorama. tonight on panorama, we expose the billionaire who corruptly exploited her own country. she ruled supreme in grabbing whatever she wanted in this country. leaked documents reveal how a president's daughter made billions. this is a classic example of corruption, somebody being able to use that relationship to benefit themselves. isabel dos santos lives the high life from her london home. but we find the people left in squalor so she could make money.