welcome to bbc news, broadcasting to viewers in north america and around the globe. my name is mike embley. our top stories: as turkey is preparing to reveal all about the murder of the journalist, jamal khashoggi at the saudi consulate in istanbul, the us treasury secretary holds private talks in riyadh with the saudi crown prince. president trump warns that the us will build up its nuclear arsenal to pressure russia and china as he threatens to pull out of a landmark treaty. it's a threat to whoever you want, and it includes china and it includes russia and it includes anybody else that wants to play that game. cristiano ronaldo claims the truth is coming as he speaks publicly for the first time about the rape allegation against him. spanning 55 kilometres, the world's longest sea bridge linking hong kong and macau to mainland china is opening for business. turkey's president has promised

he will present new information within hours about the death of the saudi journalist jamal khashoggi at his country's consulate in istanbul. the saudi foreign minister has now acknowledged that mr khashoggi, and called it a "tremendous mistake. " he also called it a "rogue operation" — a line echoed by president trump, who's now sent the director of the cia to istanbul. our diplomatic correspondent james robbins has the latest. these are the latest pictures to emerge of jamal khashoggi with his fiancee. they are arriving at his flat in istanbul shortly before the visit to the saudi consulate where he was murdered. now, look at this picture. turkish investigators believe this is one of the saudi hit squad, chosen as a body double of mr khashoggi,

wearing very similar clothes. later, the double was apparently seen safe on the streets of istanbul after the murder. could this be part of a huge saudi cover—up? significantly, president trump is now suggesting he doesn't buy the changing saudi stories, after speaking again to the crown prince, and also hearing from his own american investigators. in saudi arabia, we will know very soon. we have tremendously talented people, that do this stuff very well. they're coming back tonight, tomorrow, and i will know very soon, and i am not satisfied with what i've heard. turkish police clearly believe they have assembled a powerful case against saudi arabia. they were at a car park to search a car with saudi diplomatic plates, possibly abandoned after the murder. turkey's president erdogan is promising to reveal much more — the truth behind a pattern of saudi lies. his party spokesman said

the facts would emerge. translation: we are faced with a situation in which a murder has been brutally planned, and a lot of effort has been made to cover it up. when we look at it from this point of view, it's a very complex murder. and a lot hangs on the truth. in the house of commons, the foreign secretary said action against the saudis should wait for the outcome of investigations. but his labour shadow, emily thornberry, demanded sanctions, including... will he accept that uk arms sales for the use in yemen must be suspended, pending a comprehensive, un—led investigation into all alleged war crimes? jeremy hunt's response... she talked about arms sales. the procedures we follow in this country, as she well knows, are amongst the strictest in the world. the foreign secretary, not absolutely ruling out a halt to weapons sales, is pointing away from it. britain has a lot to lose in money and jobs.

after the united states, the uk is the second—largest supplier, and way ahead of any other country. germany, though, is suspending its arms exports to the saudis. the largest question to be answered — to what extent is the saudi crown prince culpable? many governments do suspect him, just as they blame him for the conduct of saudi arabia's military campaign in yemen. james robbins, bbc news. let's stay with that story. earlier, i spoke to onoor errem of the bbc‘s turkish service. i asked him what new information we should expect from turkey's president erdogan when he speaks this morning. mr erdogan told over the weekend that he will release all the information he has today in his parliament speech. so it can be involving the latest car, which was found yesterday in istanbul, belonging to the saudi consulate. so it has been investigated by special teams and there may be information regarding this, as well, in the speech. what evidence do you think

turkey has, and why has it not published it officially? we've seen some leaked, but why have they not let it all out? we don't know the exact reason, but we may learn it today. as most of the information given to the international press was given by sources which were not named in the press, so they were not official explanations of turkey. but today, whatever mr erdogan says will be an official explanation. so it will be the first time we will hear all the known details from the president himself. with so many conflicting reports and theories, of course, which do you give the most weight to? apparently, saudi arabia's credibility was diminished after they changed their scenario of what happened to mr khashoggi. so they say that now it's a rogue team. but turkey is denying this, saying that it was a special team

sent from saudi arabia specially to kill mr khashoggi, so we have to wait a few more hours until mr erdogan speaks and we will see what he will say. it does seem bizarre and ironic, doesn't it, that turkey is apparently so exorcised over this particular tragedy involving a journalist, when it is jailing so manyjournalists and other people, depriving them of their human rights, of their means of earning a living. what does turkey really want from this? it does suggest there is another agenda. according to turkey, the journalists who are jailed are not jailed because of theirjournalism. turkey argues that they are in jail because of terrorism or other charges. but mr khashoggi was killed in turkey by another state, which is also a regional rival of turkey. so, this is why turkey is giving more importance to this case, and trying to get all the international media and the international public behind themselves in this case.

as a way of making a point against saudi arabia, putting saudi arabia in its place. turkey's relationship with that country was in a bad condition in the last two years. especially their relationship to qatar affected the relationship between turkey and saudi arabia. so, this will be the new episode in the relationship between those two countries. donald trump has threatened to boost american nuclearforces, he says, to compel russia to abide by an arms control treaty. he says he will pull the us out of it. mr trump said the united states had more money than anyone else and would build up its nuclear arsenal until russia came to its senses. he included china in his accusations as well. they have not adhered to the spirit of that agreement or to the agreement themselves. china is not included in that

agreement. they should be included in that agreement. until they get smart, there will be nobody even close to us. i don't have to speak to the russians. i don't have do. i am terminating the agreement. earlier, i spoke to peter bowes in los angeles. i asked him about trump's new threat to russia and china. yes, he's gone further than he did at the weekend. as you say, introducing china to this, saying that china should be part of the treaty as well, which perhaps illustrates a larger agenda for the president, perhaps a concern about the arms race, not only as it applies to russia, but countries like china as well. you also, i think, mike, need to look in the context —— you also, i think, might need to look in the context of where we are with politics in america at the moment. this announcement, this big announcement with major international implications, being made just a couple of weeks before the mid—term elections. this is a very significant election

for president trump, and for him to be seen flexing his muscle on the global stage may well win him a few votes if he doesn't have them already from his base. and, peter, we have also seen that a few of president trump's announcements, particularly in the military field, tend not to happen because perhaps people in the establishment simply don't carry them out. yes, and it remains to be seen whether this one will happen as well. there's a window of opportunity of six months before anything can happen. that's a period of time presumably when there could be some negotiations between moscow and the us. in fact, john bolton, the national security advisor, is meeting president putin later on today and that could go two ways — simply so that he could explain america's stance and the decision to pull out of this treaty, or it could be to perhaps open negotiations and perhaps pinpoint areas where both sides, where both countries feel

that this treaty is failing, and it could be built upon for the future. but as you say, the context, the timing of this is important. this announcement will play well with his core voters. yeah, i think you can't deny the timing of this. there is a frenzied political atmosphere, mike, in this country at the moment. you have the president making a major announcement like this that has little to do with domestic policy, as most people would see it, but it is important on the world stage. and that will show him in a different light, in a strong light, that many of his supporters enjoy, and perhaps would encourage others to do. —— and perhaps would encourage others to vote. peter, thank you very much. president trump says the us will begin cutting off foreign aid to guatemala, honduras and el salvador in response to the unfolding migrant crisis. he criticised those countries forfailing to stop thousands of people heading towards the us. they say they are fleeing persecution, poverty and violence in their home countries. aleem maqbool

sent this report from mexico. more than a week trekking hundreds of miles is taking its toll. a town square just inside mexico has become a makeshift camp. a place to rest on this long, punishing journey to the united states. but two—thirds of the route from their home country of honduras still remains ahead of them. translation: every day, we get more and more tired. but everything that is happening back in honduras and the thought of the future of my children is what motivates me to keep going. but mexicans have come out in force to help the honduran migrants, providing free medicines and treatment and coming to donate clothes. this, though, is just the first group of people heading through the region to america. many more are following in what's starting to feel like an exodus. of course, migrants head to the us from honduras every year,

but why so many at once right now? "if we travel alone, it's dangerous," says karen, who's i7. "in a group, we feel safe, "so when it started, ijoined and it kept growing." donald trump says he is going to cut millions of dollars in aid to central american countries, because they haven't been able to stop people making this migration. but all around us, we can see people from those very countries driven to do this because of the extreme poverty back home. right along the route, local people and aid agencies have provided sustenance, but this is still no easy undertaking. "we're just simple people," jose rodriguez tells me. "there's no work back home so we have to go elsewhere." "we're not looking for problems with anyone, "we just want to provide for ourfamilies." this may have become a political story in the united states, but as they prepare to resume their tough journey, it's clear what's brought so many people together is not politics,

but sheer desperation. we will keep track of that story. stay with us on bbc news. still to come, a chance to be a billionaire overnight — americans are in the grip of lotto fever. a historic moment that many of his victims have waited for for decades. the former dictator in the dock, older, slimmer, and as he sat down, obedient enough. dawn, and as the sun breaks through the piercing chill of night on the plain outside korem, it lights up a biblicalfamine, now, in the 20th century. the depressing conclusion — in argentina today, it is actually cheaper to paper your walls with money. we've had controversies

in the past with great britain. but as good friends, we have always found a good and lasting solution. concorde bows out in style. after almost three decades in service, an aircraft that has enthralled its many admirers for so long taxis home one last time. the latest headlines from bbc world news: as turkey prepares to reveal all about the murder of the journalist, jamal khashoggi, at the saudi consulate in istanbul, the us treasury secretary has held private talks in riyadh with the saudi crown prince. well, the saudi government and its allies are also facing new questions about their role in the war in yemen. a proxy war has ravaged the country since 2015 as a government

coalition, led by the saudis and supported by the uk, us and france, has clashed with houthi rebels, backed by iran. the fighting has killed at least 10,000 people, and coupled with disease and starvation, has triggered what the united nations calls the world's biggest humanitarian crisis. the port city of hodeidah, controlled by the houthis, is strategically important because most of the country's food passes through it. un officials say its closure would be a disaster. 0ur international correspondent 0rla guerin is one of the few western journalists to report from hodeidah. there are distressing images coming up. repairing wounds of war, surgeons in hodeidah operate on 13—year—old sadam. he has shrapnel embedded close to his spine. this city is now yemen's key battleground. more civilians are being killed here than anywhere else. and one child in four

is malnourished, like amir. too many mothers here don't watch their children grow up. they watch them waste away. 0ne—year—old maria has been in and out of al—thawrah hospital. her mother, yasmin mohammed, is worn down by the conflict. "the war has had a big impact," she told us. "we can't even buy medicine for our children. a lot of people in my street have died because of the air strikes. they went out to look for work and never came back." well, there is so much need in this hospital. you find every conceivable type of suffering connected with the war — starvation, disease, amputations.

doctors are battling with a lack of even basic medicines. and for everyone here, staff and patients, there is the fear that every minute, day and night, nowhere is safe. that was the case for the civilians who are sitting here. their minibus was hit at 10:30am in the morning as it passed through a houthi checkpoint. survivors say it was an air strike by the saudi—led coalition. the attack, just days before we reached hodeidah, claimed 15 lives. we found one of the passengers, amir salman homadi, a construction worker who relies on his hands. "i felt happy, that morning, that i was going to work to feed my family," he said. "after the explosion,

i don't remember anything until i got to the hospital. my god will punish them and send them to hell." are you sure it's an air strike? "there was an aeroplane," he said. "i heard it before i got on the bus. it was the saudis who killed the people." the united nations says air strikes by the saudi—led coalition cause most civilian deaths in yemen, but it says the houthis also take innocent lives by indiscriminate shelling. if there is street—to—street fighting here, those who cannot flee will be trapped between the two sides. and this is the prize — the strategic red sea port of hodeidah. what happens here is vital.

if the houthis lose the port, it could turn the tide of the conflict. it is quiet for now, but the front line is just miles away, and getting closer. around 80% of yemen's food supplies come through here. during three years of war, this lifeline has already been a casualty of air strikes and a saudi blockade. but both sides are accused of delaying tactics that guarantee more hunger in yemen. the united nations has warned that if fighting closes this port, even for a short time, the impact would be immediate and catastrophic. within days, hundreds of thousands of yemenis won't have the food they depend on. within weeks, that number would escalate to millions. the closure of this port could be the triggerforfamine. and, just minutes from the port, a community at the margins, already the poorest of the poor.

we found tahir abdullah at home with four of his eight children. the youngest, nasim, is two. tahir says, the older he gets, that thinner he gets. "the children often don't eat for an entire day," he says. "the youngest have never tasted milk. most of the time we survive on bread and tea." today, they are eating. tomorrow, maybe not. it is war that has brought this nation to the brink of famine. aid agencies say yemenis are not starving, they are being starved. 0rla guerin, bbc news, hodeidah. terrible times in yemen

and no end in sight. let's get some of the day's other news. british prime minister theresa may says she's ready to "explore every possible option" to break the deadlock in the brexit talks. in parliament, she said 95% of the deal with the eu is done, but the irish border is still a "sticking point". she also faces major opposition within her own party. she said any extension to the transition period would end before the next election in 2022. mexico has issued an alert for parts of its pacific coast as it prepares for hurricane willa, now at the highest category, five. willa is due to make landfall in mexico on tuesday and meteorologists are warning the storm is potentially catastrophic and life—threatening. it's expected to bring torrential rain, majorflooding and landslides. in brazil, the far—right presidentialfrontrunner, jair bolsonaro, has said he will cleanse the country of what he called "corrupt elements of the left—wing workers party." mr bolsonaro made the threat in a video link to supporters

in sao paolo ahead of sunday's presidential run—off. the footballer cristiano ronaldo has responded to questions about a rape allegation he's facing, by insisting that his lawyers are confident. he was speaking at a news conference at old trafford in advance of the champions league match between his current club, juventus, and his former club manchester united. christiano ronaldo denies the allegation, which dates back to 2009. we gave a statement two weeks ago. i will not lie about the situation. i am very happy. my lawyers are confident and i am as well. the most important thing is that i enjoyed my football and my life. the rest, i have people to take care of my life and the truth always comes out. so i am good. the world's longest sea bridge

is being officially opened, connecting the special administrative regions of hong kong and macau to mainland china. this is the view of the newly completed bridge, as seen from hong kong. the bridge is designed to withstand earthquakes and the seasonal typhoons which tear through the region. it cost $20 billion to build and has been almost a decade in the making. a short time ago chinese president xijinping opening the bridge at a ceremony held in the mainland chinese city of zhuhai. the bridge is due to open to traffic on wednesday. once again, much of the united states is in the grip of lotto fever. the latest mega millions draw will take place on tuesday, with a potentialjackpot of $1.6 billion, the biggest pay—out in history. another draw, the powerball, is also taking place, but the winner of that one will only get a measly $600 million. the bbc‘s tim allman has the story. hope springs eternal on the streets of manhattan. especially when a combined prize

of over $2 billion is on offer. no—one has won the mega millions or the powerball, so the jackpot keeps getting bigger and bigger. i believe i have already won. i believe in the law of attraction. so what's meant to be is already gonna be. people just go crazy and panic. it's just a chance to see if i can win some billions, to help some people. it could be you. but the odds are not on your side. the chances of winning the jackpot stand at one in 303 million. in context, your chances of being eaten by a shark are only one in 3.7 million. and there is a one in 300,000 chance that you could be killed by lightning.

if you do win the mega millions, this will be your dilemma. take $1.6 billion over a period of 29 years or just settle for around $900 million in a lump sum? decisions, decisions. and what if no—one wins? then we try again. and the jackpot gets bigger still. so many decisions. now, this macabre yet colourful parade is preparation for the annual day of the dead in mexico city. here it is. hundreds of people dressed up as the iconic character, la catrina, the mexican representation of death. mexicans celebrate this every year in honour of family members who have died and the continuity of life. much more on all the news anytime on the bbc website. you can reach me and most of the team on twitter. thank you for watching. hello there.

we have got much colder weather by the end of the week. monday was a cooler day and with the clearer skies following the sunshine, we have seen temperatures not far from freezing in some rural parts across the southern part of the uk. it will warm up in the sunshine, for most places it will be dry today for most places with a brisk wind blowing. probably not quite as windy across the northern half of the uk as it was yesterday but strong wind around this area of high pressure and those weather fronts focusing some cloud and rain. mainly for the north and west of scotland, some sunshine at times for eastern scotland. 40—5mph gusts across scotland and the pennines and hazy sunshine. rest of the sunshine across other parts of england and wales. it may be warmer on tuesday, those temperatures at 16, 17 degrees even in the sunshine of eastern scotland. we still have winds easing down through the course

of the evening and overnight. the rain beginning to ease off a little bit as well. some cloud will push further down into england and wales. so it probably won't be as cold overnight into wednesday morning. it will always be the sunniest across southern and eastern parts of england. perhaps eastern scotland for a while. elsewhere there is quite a bit of cloud across the north—westerly breeze. by this stage, the winds will not be as strong and the rain will ease off, just for a while, in the north—west of scotland. those temperatures could hit 16, 17 degrees. quite mild for this time of year. there is still high pressure to the south—west of the uk, we've still got these weather fronts running around the top of that area of high pressure. this one is the significant one because it is behind that that we will really get some cold air. not just yet, though. thursday should be dry for many with some sunshine around. cloud coming into england and wales. we have got this rain gathering in the north—west of scotland, temperatures perhaps a shade lower.

that rain that is gathering is on the cold front and that is significant because behind it the wind direction changes — we draw all our air from the arctic, plunging down colder conditions on friday. there is the cold front, not a great deal of rain on that across southern parts of england. sunny skies follow and showers coming from the north, turning wintry over the high ground in scotland where it it will feel close to freezing. briefly we may find temperatures is may reach double figures in the south. this weekend we are struggling to make double figures. most places will be dry with sunshine and there will be showers around and those will be wintry over the high ground in the north. this is bbc news. the headlines: the us treasury secretary has held private talks in riyadh with the saudi crown prince amid the international concern over saudi involvement in the murder of the journalist jamal khashoggi. turkey's president has promised to reveal details of the killing on tuesday and president trump has sent the director

of the cia to istanbul. donald trump has threatened to boost his country's nuclear forces to compel russia to abide by an arms control treaty, which he has said he plans to quit. mr trump told reporters that the united states would build up its nuclear arsenal until russia came to its senses. the longest sea bridge in the world has opened with a ceremony, which the chinese president, xijinping, has attended. the $20 billion project, which combines bridges and an undersea tunnel, links hong kong and the macau peninsula to mainland china. now on bbc news, hardtalk.