welcome to bbc news, broadcasting to viewers in north america and around the globe. our top stories: the saudi—led coalition says it will investigate an airstrike which killed 29 children in yemen. the un demands it be "credible." in romania, tens of thousands attend anti—government rallies. more than 200 people are injured. nasa is just hours away from launching a probe to the sun. it'll get seven times closer than any spacecraft before it. an immigration reprieve for a 9—year—old chess prodigy. we meet the boy whose talents mean his family can stay in the uk. the un security council has called for a "credible" investigation

into an airstrike on a bus in yemen that killed at least 29 schoolchildren. earlier, the saudi—led coalition, which carried out the attack on thursday, said it would investigate what it called "collateral damage." aaron safir reports, you may find some of the images distressing. preparing to bury the dead. nearly 10,000 people have died in more than three years of war in yemen, but thursday's attack stands out. children, apparently on their way back from a picnic, hit by an air strike. it happened near a market in the rebel—held province of saada. un officials called it "a new low" in the conflict. what happened on thursday will change the lives of these children forever. they are now receiving what help is available in yemen's overstretched hospitals. translation: the blood bank here does not have enough blood. thanks god, we are doing what we can. there are multiple injuries to the brain, to the bones. at first, saudi arabia,

which leads the international coalition fighting the houthi rebels in yemen, said the attack was legitimate, targetting militants launching rockets. later, as outcry grew around the world, the saudi military promised an investigation and, after a closed—door meeting, the un security council said it will review what the saudis come up with. the important thing is the word "credible". if there is an acceptable, credible investigation, then the council will want to consider next steps in the light of that. if any investigation held is not credible, the council will obviously want to review that, and want to review if more is necessary. for many, though, it is not enough. human rights watch say we have been here before... britain, the us and france all sit on the un security council and all support the saudi

coalition to restore yemen's internationally recognized government. but they are concerned that this attack and yemen's worsening humanitarian crises is growing. they have not called for an independent investigation, willing for now, it seems, to wait and see. as the children are treated and the war rages on, the world is looking for answers. who asks the questions will be crucial. aaron safir, bbc news. for more on this, let's speak to larry lewis, who's in fairfax in the us state of virginia. he's advised the saudi coalition on how to avoid civilian casualties, and helped the coalition form the body that will investigate this incident. thank you forjoining us. they used the word collateral damage, the saudis. how exactly does this occur ina wartime

saudis. how exactly does this occur in a wartime situation? certainly. so, there are several different ways it can happen. what we have found in lots of investigations and studies as to how these casualties occur, there are two main mechanisms of civilian casualties. 0ne there are two main mechanisms of civilian casualties. one is indeed collateral damage. there is a military engagement of what they consider a valid target, and then there are civilians that are inadvertently in the area. the other is the certification. so a military orair is the certification. so a military or air force believes the target is valid, however, it makes a mistake and inadvertently targets civilians. so how do you help military has to not make these mistakes? —— militaries. the basic premise is

that we have a hard time fixing problems if we don't understand what they are. when i first did my work in afghanistan for isac in 2009, the coalition was struggling with this issue of civilian casualties. they had been trying to do different things to improve but the kept getting worse. so when i came in i did a study and what we found was that a lot of common assumptions about how civilian casualties occur are actually incorrect. so we found what the causes actually were, and based on those, there were a number mitigating steps militaries could use to reduce civilian casualties. you have been teaching about this and you say that for the saudis, the time for patients is over. why have you come down so hard on them?” time for patients is over. why have you come down so hard on them? i say that being very aware of things that

they have done, and things that they have done well. was i sent by the state department to work with them backin state department to work with them back in 2015, and through much of 2016, and honestly, they were very risen to that first. we were monitoring progress and we actually did seep progress. —— see. i know they did care about this issue. but what we saw was that there was a regression. after the ceasefire in april 2016, things resumed in august 2016 and things seemed much worse. and i attribute that to a normal thing with militaries, you have folks moving in and out of headquarters, we had in working with specific people who would probably rotated out. —— who were. the

u nfortu nate rotated out. —— who were. the unfortunate thing is we have not seen much progress and then, and thatis seen much progress and then, and that is the basis of my concern about continuing to just wait and see. you did help establish the body which will investigate this attack on the school bus. do you have any faith in their abilities and potential findings? faith in their abilities and potentialfindings? so, yes. i help is give them —— helped give them the structure and ideas to form that body, and then i did work with them early on in 2016. i will say the initial work that they shared with me was a good start. however, they also acknowledged they hadn't really done this before and so there was a learning curve. so unfortunately what we have seen over the last three years is we really have not seen the progress that body was really intended to help promote.

they were created to investigate, but also to provide a basis for learning. you can see improvements and operations over time, and hopefully less civilian casualties. thank you very much, larry lewis, who used to advise the saudi coalition and works at the state department. tens of thousands of romanians have been protesting against corruption and low wages. in the capital, bucharest, police clashed with protesters demanding the government stands down. tiffany wertheimer reports. in the centre of bucharest, right at the front of the city's government building, this crowd demands change. the protesters want the governing social democrat party to design, angered that it's sacked an anti—corru ption prosecutor whose work was highly effective. scuffles broke out between protesters and police. some demonstrators threw

bottles and tried to break through barricades. police fought back with tear gas and water cannon. more than 100 people on both sides have needed medical treatment. many of these protesters are romanians living abroad but have returned home to join the rally, wanting an end to the country's corruption, low wages, poor living standards and the government's interference in the justice system. since the social democrat party came into power last year, it's tried to decriminalise several corruption offences. hundreds of thousands of people have signed a petition demanding a law that would ban anyone charged with corruption from running for office. according to the world bank, there are between 3—5 million romanians working abroad where there are more opportunities and more money. tiffany wertheimer, bbc news. a jury in california has ordered

the agro—chemical company, monsanto, to pay nearly $290 million in damages to a man who became terminally ill after using the firm's weedkiller. dewaynejohnson, a school groundsman, alleges his cancer was caused by glyphosate in monsanto's roundup and rangerpro weedkillers. israeli soldiers have reportedly shot dead a paramedic during the latest clashes on the territory's border. the gaza health ministry also said another man was killed and more than 300 people were injured. israel says demonstrators threw firebombs at troops during the confrontations. turkey's currency has continued its sharp slide on the foreign exchanges, after president trump announced the us is doubling its tariffs on turkish steel and aluminium. the lira has lost about 20% of its value in 2a hours. president erdogan said the drop is part of a campaign led by foreign powers, and urged people to buy lira with their foreign currency. selin girit reports from istanbul. a day the financial

market will never forget. the turkish lira has seen ups and downs but it has never sunk so low before. at one point the lira plummeted by nearly 20% overnight but the turkish government was keen to put on a brave face. translation: they keep on talking about this foreign exchange rate and whatnot, forget about that. despite all the tax aimed at our country through foreign exchange rates, god willing, we will continue to grow in the second quarter and in the 2018 at record highs. erdogan‘s rhetoric may have gone down well with the supporters but not with international markets. another major blow came when the us president donald trump tweeted this to announce a doubling of steel and aluminium tariffs on turkey. "0ur relations with turkey are not good at this time," he commented. they argue that the extra tariffs were against the rules of the world trade organisation

as the rift between the two nato allies deepened. these are the options that turkey has at the moment, an hike which president erdogan sees as the mother of all evils is not likely to happen. he might seek help from the imf, following the example of argentina, but that is not likely either as it will have strings attached and it will be frowned upon in turkey. there is a feeling that the quickest and most efficient step is to ease the tensions with washington, and for that to happen, washington expects an american pastor currently under house arrest in turkey to be released and sent home. 0therwise washington warns more sanctions could follow. selin girit, bbc news, istanbul. the sun bbc news. soon to come, checking up on china. we are on

board an american military plane in the south china sea. as the lines of fans became longer, the police prepared for a hugejob of crowd control. idi amin, uganda's brutal former dictator, has died at the age of 80. he's been buried in saudi arabia, where he lived in exile since being overthrown in 1979. two billion people around the world have seen the last total eclipse of the sun to take place in this millennium. it began itsjourney off the coast of canada, ending three hours later, when the sun set over the bay of bengal. this is bbc world news.

the latest headlines — the saudi—led coalition has announced it will investigate its air strike in yemen which killed at least 29 children. the un security council has insisted it be credible and transparent. in romania, tens of thousands of anti—government protesters have taken to the streets over low wages and what they call entrenched corruption. police and protesters clashed in the capital bucharest. more than 200 people on both sides were injured. in the coming hours, nasa is due to launch a probe to the sun. the parker solar probe will be the first ever such mission and the spacecraft will get seven times closer to the star than any spacecraft before it. it's hoped the mission will help us better understand space weather and solar radiation. earlier i spoke to spacejournalist

with space up close, dr ken kremer. he's at the launch site at kennedy space center in florida. i started by asking him why this mission is such a big deal. why is this a big deal? great question. it's the first time we can really study a star. it took 60 years to developing the technology to fly within 4 million miles of the sun so that is why it is a big deal. we've never done it before, the sun is the source of all life on earth and so we want to understand how the sun operates and space weather and how that impacts us everyday. so you have things like solar winds, right? yes and coronal mass ejections, every once in awhile they get really big and can knock out the power grid, communications and what we are really concerned about is something like the carrington event back in 1859, it was so massive. if it happened today it would knock

out all the geostationary satellites, would severely impact the power grids here on earth, would wreak havoc on modern civilisation. it didn't back then because we didn't have that technology but today we do. we want to figure out how the sun really works and how we could eventually predict what is known as space weather to beef up and protect our satellites. you know what the summer has been like, it's been pretty hot here. i can't imagine what a spacecraft getting so close to the sun, how it will cope with that kind of heat and radiation and the rest of it? great question. that's why we haven't been able to do this for 60 years. there is a 14—inch thick heat shield made out of carbon materials that are extremely advanced and what they will do is reduce

the temperature that impacts the spacecraft from 2,500 degrees on the side facing the sun and then the instruments behind it will be cooled by that down to 85 degrees and that's the only way it can survive. it took a lot of scientific research to develop this very thin, very lightweight heat shield that protects the spacecraft behind it. as it is flying through space, there is a heat shield in front and that's what protects it. from what have read as well, it is also a very fast machine. one of the fastest human—built things in the space, getting to its destination. absolutely. in fact, it is the fastest. it is nearly half a million mph. about 430,000 mph. that is almost ten times faster than anything else we have sent. the prior one that was fastest was the pluto probe, new horizons, launched ten years ago. this is almost ten times that speed

and it's launching on a delta iv heavy which is an extremely powerful rocket. ijust came from the launchpad and everything's ready to go. thank you, dr ken kremer. new video footage taken in the south china sea appears to showjust how far china's military development has progressed in the spratly islands — the chain of islands which lie between vietnam and the philippines, with china to the north. all three countries have claims on the spratlys, but china has been building on them. rupert wingfield hayes joined a us navy surveillance flight over the islands. this is his report. this is the chinese navy politely telling the us navy to go away. far out in the south china sea, we're approaching one of china's huge new island bases. it's very clear they do not want us here.

for the crew aboard this us navy p8 surveillance plane, this is now a daily encounter. it's a routine occurrence for us on these flights. it happens throughout the flight, when they come over and then we just go back with our standard response. it really has no effect on any operations or anything we do. as we close to 12 nautical miles, we can now see the huge extent of china's development out here. so, what we're seeing on the screen here is live pictures of a place called mischief reef. the last time i flew over here two—and—a—half years ago, it was really just a large pile of sand. now you can see there has been extensive construction. this is what it looked like then — millions of tonnes of sand being pumped onto the reef to create new land. the first outline of a runway, but no buildings. look at the same place today — a forest of radar domes, aircraft hangars and maybe a building

to park missile launchers. using the plane's high—powered camera, we watch as a group of vehicles drives down the runway. one, two, three, four, five, six, seven, eight, nine... nine vehicles, moving. still looks like nothing on the runway, no aircraft present. these flights aren't just about surveillance. the americans are here to make a point. in the broadest sense, it's making sure that we maintain the rights that we have as a military aircraft, to fly in international airspace, maintain our presence in the area and show that we're not worried about the build—up that's happening and we're going to continue to stay down here in the south china sea. to understand what is at stake out here, listen to how the chinese navy today talked to an aircraft from a smaller, weaker neighbour, the philippines. with the spaces, china is succeeding in changing the very geography of the south china sea.

with the spaces, china is succeeding in changing the very geography of the south china sea. despite america's assurances, down here the tide of history appears to be flowing towards beijing. rupert wingfield hayes, bbc news, with the us navy in the south china sea. a 9—year—old chess prodigy from india has been told he won't have to leave the uk when his father's work visa expires next month. shreyas royal learned to play the game after moving to south london six years ago — now he represents england at international level. his father had been told he didn't earn enough for his visa to be extended, but now the uk home office has stepped in, as chi chi izundu reports. this is shreyas royal. he may be only nine, but he's ranked fourth in his age group in the world. he's a silver medallist, and, according to a former chess grand master, the greatest chess

prospect in a generation. he only started playing chess three years ago, but was told he would have to return to india with his family, unless his dad could get his work visa renewed by next month, and immigration rules state that that can only happen if he earns £120,000 a year — which he doesn't. he grew up here and when we heard that, it's really sad for us and surprising for us. his dad, jitendra, appealed to the home office who they told him that, while, yes, his son showed immense promise, it did not mean the family could stay in the uk. two mps have backed shreyas' case. in a joint letter to the home secretary, leeds west mp rachel reeves and greenwich and woolwich mp matthew pennycook said: "he performs outstandingly in adult competitions, breaking uk records in the process. if shreyas royal is forced to leave the uk and return to india, the country will lose an exceptional talent." the home secretary personally looked in to the royal's case and has extended their right

to remain on their current visa. how did you react when you heard that you had been given leave to extend your current visa? i was jumping here and there and dancing. i almost trashed the room, so i was really happy today. the home office says it considers every application on its merits, but for now, shreyas is concentrating on competing in the chess championships. i want to be the best at it and become the world chess champion at the age of 18. chi chi izundu, bbc news. don't forget you can reach me and most of the team on twitter — i'm @ nkem ifejika. good morning.

weekend weather coming up, but first, let us look back at friday, because it was a day of mixed fortunes, some heavy rain around for some. so much so that weather watchers had to shelter under hastings pier to get this dramatic shot. there was some sunshine to be found, particular cross the channel isles, as you can see at guernsey. there was this kind of changeable theme that moves us towards the weekend, in actual fact. something that will be quite important will be the feel of the weather. that is because we have these clear skies moving across us as we speak. the air direction coming from the north—westerly, quite quiet. the showers disappeared. not much in the way of significant weather to talk about. temperatures are falling away. that is worth bearing in mind if you are up and off early saturday morning. likely to see single figures, may be low single figures in rural spots. a chilly start to saturday. lots of sunshine around.

that bodes well for day three of the cricket. it looks as though we could get a decent day's play in there. perfect weather conditions for spectators and players. we have already talked about the clear skies, plenty of sunshine around first thing on saturday. as we go through the day the cloud will gather into the south—west. rain putting into south—west england and wales, eventually into the midlands. clouding over a little bit. sunshine turning hazy. nevertheless, eastern areas staying dry, highest values potentially of 23 degrees. the breeze will pick up a little along the west facing coast as we start to see the rain arriving through the evening and the overnight period. the rain will push in. a few bursts through the night. there is a level of uncertainty as to how much wet weather we are likely to see on sunday. this area of low pressure still producing 12 headaches from time to time. it looks at the moment as though the rain is likely to linger first thing in the south—east. behind is that they will be quite a lot of cloud on sunday, a muddy humid field for all. isolated showers. if we get some brightness then temperatures will start to respond. and they will start to pick up. generally speaking, we are looking at them sitting in the local 20s. as we move out of sunday into monday, the area of low pressure still sitting out to the east. we are likely to seek

showers around. as we go through the week this ridge of high pressure will build. it is an improving picture. after a slightly disappointing start on monday we could start to seek more warmth pushing into the south—east for some on tuesday. this is bbc news, the headlines: the saudi led coalition has announced it will investigate it airstrikes in yemen, which killed at least 29 children. it hit a school bus in the town of saada, which is under the control of iranian backed houthi rebels. the united nations says any investigation must be credible and transparent. tens of thousands of romanians have been protesting in the capital, bucharest, and other cities, against government corruption and low wages. police used tear gas and water cannon to disperse crowds are some demonstrators threw missiles. more than 200 people, including police, have been injured. nasa is set to launch a spacecraft to the sun in the coming hours. the parker probe will gather information on solar winds, which can disrupt satellite

communications. it will go seven times closer to the sun than any spacecraft before it and it is the fastest ever made. now on bbc news it's time for more from the money and power season