this is bbc world news. the headlines: at a summit in brussels there's been disagreement about how to implement a deal to control migration from outside the eu, just hours after it was signed. france and austria have already ruled out hosting secure centres for migrants — a central plank of the agreement. canada has responded to president trump's tariffs on steel with retaliatory duties on more than $12 billion worth of american goods. the canadian tariffs — which come into effect on sunday — target us steel, aluminium, and consumer goods ranging from orange juice to toilet paper. canada has responded to president trump's tariffs on steel with retaliatory duties on more than $12 billion worth of american goods. of course, we have told you all about that story. much more coming up about that story. much more coming up on bbc world news. the carbon dioxide shortage which has hit britain's food and drink industry has now spread to crumpets. the simultaneous shutdown of several

major carbon dioxide plants is effecting supplies of many everyday products, including soft drinks, beers and meat. here's our business correspondent emma simpson. and her report does contain some flashing images. crumpets, one of our favourite treats. they should be making 25,000 of them an hour at this factory. but the production lines have ground to a halt. two of warburtons‘ big bakeries have run out of c02. this is the point at which we package our crumpets and here we fill every packet with c02. that helps us maintain the freshness and quality of our product over the shelf life. i've got two plants here that haven't run for the last ten days. it's a massive impact on our ability to provide our customers. but supermarkets aren't running out of crumpets just yet. it's notjust some bakery products that rely on c02. it's everything from fresh salads, chicken, meat, ready

meals, sliced cheese. because the c02 in the packaging helps keep your shopping fresh for as long as possible. c02 also puts the fizz into lots of soft drinks and beer. this gas really matters to our food and drink supply chain. why is there a shortage? a lot of carbon dioxide is created as a by—product when making fertiliser. plants usually scale back production in the summer, but this year, even more than normal, just as demand for drinks has shot up thanks to the world cup and the hot weather. the shortages are even causing problems in abattoirs. they need c02 to stun pigs and poultry before slaughter. it's having an impact at scotland's biggest pig processing plant. it's been shut since tuesday

and we don't actually know when it's going to open again. added on to that, a number of the packing plants which would take the product and then make it into sausages and mince and things like that use c02 in that and with the shortage those plants have had, it's hard to see how we're going to avoid some disruption to the product on the shelves. at warburtons, they're not sure when things will get back to normal either. but c02 producers say they're working as hard as they can to resume production. emma simpson, bbc news. now on bbc news, click. ken artificial intelligence out to diagnose a doctor? can a foreign bring a draft alive? and can this robot make this jump? —— can.

britain's national health service turns 70 this week and it is struggling to keep up with the modern world. an increasing population who are living longer and to have a folding health—care needs has led to not another hospital beds, not enough access to specialised treatment, not enough nurses, and not enough doctors. the situation in developing countries is of course far worse. a start, there is nowhere near enough muggy, but where you do have muggy, you have theissue where you do have muggy, you have the issue of poaching of medical staff by richer nations. 0ne hope is to plug the gap with artificial

intelligence. ibm's what's for instance, fed with information about cancer, may be better at diagnosing itand humid cancer, may be better at diagnosing it and humid doctors, and the hope is that it could be cheaper. —— watson. but more immediately, we are seeing the introduction of apps like senselink, which uses ai seeing the introduction of apps like senselink, which uses al to diagnose and is that we fillion. in other words, doing some of the work of a traditional gp. 0nce some are sceptical that doctors can be replaced in this way, this week, one company claims that its at eight is now better than a doctor. —— one —— ai. artificial intelligence can improve our lives in a way better than we can understand. noel plays better than healthcare, than we can understand. noel plays better than healthca re, wet diagnosis could mean the difference

to life and death. —— nowhere else. please, how can i help you? and that this week in london, babylon health claimed its artificial intelligence softwa re claimed its artificial intelligence software can now diagnose illness better than a doctorlj software can now diagnose illness better than a doctor. i think i might know what is causing your symptoms. the cabinet has also launched gp at hand, providing access to legal services in london. but the only involvement of artificial intelligence here was an outward and that i's uterus and contractor. he was ultimately humid doctorfor a diagnosis. contractor. he was ultimately humid doctor for a diagnosis. now contractor. he was ultimately humid doctorfor a diagnosis. now babylon says its software has written a work and pass a medical exam with a higher average grade than a person. what i found fascinating is that not only it performed as well as them, but in questions it had seen before, it had 98% accuracy. so once the

machine learn something, it never forgets. there are clear implications for this test were people in the world who do not have access to healthcare. since 2016, ba bylon access to healthcare. since 2016, ba bylo n have access to healthcare. since 2016, babylon have provided healthcare services to rwanda in central africa. sub—saharan services to rwanda in central africa. sub—sa ha ran africa services to rwanda in central africa. sub—saharan africa has 11% of the world's population, but carries a quarter of the world's disease burden, and just as 3% of the world's medical staff. in rwanda, the country faced a particular catastrophe with its healthcare particular catastrophe with its healthca re system after particular catastrophe with its healthcare system after suffering one of the worst atrocities in the last century. 0ver one of the worst atrocities in the last century. over 800,000 people we re last century. over 800,000 people were killed in just last century. over 800,000 people were killed injust 100 last century. over 800,000 people were killed injust100 days in the genocide of 1994. this memorial is the resting place of over 250,000 people who were killed in the area surrounding the capital. the genocide touched nearly every person in rwanda, decimating humid resources . in rwanda, decimating humid resources. when the genocide ended,

there were only 198 health professionals left for a population of over 6 million. it is difficult to overemphasise the challenges of rebuilding a society after such a tragedy. but today rwanda is regarded as an economic success story in africa. its president has invited tech companies to the country to test ideas. first drones and is now artificial intelligence. weep visited the offices of babylon cold ba byl. where weep visited the offices of babylon cold babyl. where did you see a devastation of the artificial intelligence. the company already has 2 million registered users and has 2 million registered users and has the thousands of consultations. —— we are here to see a demonstration. but ba byl —— we are here to see a demonstration. but babyl is using the same chat bot that its uk

customers would use that there are several differences you. most people use videophones, not smart phones. so the service is provided by a nurse, who reads the text over the phone. this is the symptom checker which would refer the patient to be human doctor. with long waiting times and long walks between homes and health centres, patients using the up and save a lot of time. —— app. after speaking to the nurse with a chat bot, this woman was able to pick up a perception in about ten minutes. —— this man. translation: you see? the service is easy. you can use at home and come to the hospital and they will see you immediately. babyl have employed several masses make matters to get the message out there. —— employed several methods. they hold rallies around markets all over the country and to street outreach. many people we are ready met already signed up.

she has a deregistered. some had appointments. translation: it is really good because sometimes you take a taxi and pay 600,000 rwandan franc is, and pay 600,000 rwandan franc is, and then find the doctor is not there. —— some had already registered. but for others, there are several barriers for them using ba byl. are several barriers for them using babyl. i are several barriers for them using ba byl. i don't are several barriers for them using babyl. i don't have a phone. —— francs. and on the chat bot, the country was deceived more specific details integrated into the software. the artificial intelligence it is being tested here with babyl intelligence it is being tested here with ba byl has intelligence it is being tested here with babyl has been brought in from the uk system, but, as you know, public health issues are different in the uk and in rwanda. for example, rwanda as malaria. we didn't find example, rwanda as malaria. we didn'tfind any example, rwanda as malaria. we didn't find any question related to malaria. we need to give it a local context. —— rwanda has. so we are developing models for the traditions that are not involved in the ai,

such as tuberculosis. things that are important for a contact. back in the uk, babylon and oust the performance of its chat bot versus human doctors. it said its diagnosis rate was 81% on its first attempt, versus 72% for a human. they calculate that average over five yea rs of calculate that average over five years of exam results. but the results have been questioned by some senior doctors, who have questioned the timing of the releaselj senior doctors, who have questioned the timing of the release. i would not with the research that i do go public on, and have a big media event, before putting it through the scientific process, because i want to know that the reception i am doing is defensible, rigourous, and that my peers agree with it. and i don't think we have been through that process yet. this important debate will continue as artificial intelligence becomes more prevalent in ourdaily

intelligence becomes more prevalent in our daily lives. certainly critical to this is finding safe and rea rseat critical to this is finding safe and rearseat tested way to integrate the technology into routine medical care. “— technology into routine medical care. —— rigourously tested. hello and welcome to the week intact. it was the week that uber was granted a short—term licence to work in london. it ended an uncertain period for the company following the decision by taswater london not to renew its licence. at the time, tfl said it was not a fit and proper operator. adobe working on artificial intelligence to find out ifan image artificial intelligence to find out if an image has been digitally altered. and the singles chart at another revamp, as sites like youtube and apple music will now cut towards the charts for the first time. it is also the week that facebook dazzled its plan to use drones to pin down internet connectivity from the sky. it was a

nice in 2014, but it has not been plain sailing for the social network, with its drones to two failing to achieve long flight times. —— with its drones failing to achieve. and a combat vehicle was revealed that relied on an altogether different type of world. it is claimed that the wheels will result in better remove —— manoeuvrability. and if you like peter, you might want to look away 110w. peter, you might want to look away now. as peter making robot can spread this will stop at the pit and the other, and even cut it for you. the committee behind the plot says it does not work faster than a human peter make up that could be more efficient by making several pieces at the same time. —— the bot. ——

than a at the same time. —— the bot. —— thana human at the same time. —— the bot. —— than a human pizzaiola. deep in boston something stirs. it is a cheetah. and it is off for a prowl. we are starting to see walking robots like this trotting out of laboratories around the world. now the important skill here is not that they can walk a particular route autonomously. they are usually controlled manually using games controllers. the amazing skill here is that they can walk and balance as co m pete ntly is that they can walk and balance as competently as we can, even on the most unforgiving of terrain. 0k, thatis most unforgiving of terrain. 0k, that is impressive. that slips, loses its balance, and regains it. that is the important thing. whoa! good shot!

how hard is this? very, very hard. we move our body very easily, but we have to make sure we know that we have to make sure we know that we have three times for more neurons. we are trying to mimic this. it is hard. how close are we to robots like this being practical? what do we need to get right?|j like this being practical? what do we need to get right? i think we're pretty close in of mobility, like walking around, climbing upstairs, turning. the issue is using arms still. i sent this to power plants with regular radioactivity. 0pening doors is difficult. that is where autonomous control fails easily. so

we are thinking about combining human manipulation combined with nearly autonomous navigation. it can go nearly autonomous navigation. it can 9° by nearly autonomous navigation. it can go by itself. a human can come in if there is a door and use human input. now it can go through autonomously. check this radiation level. and he has that in hand as well. really quick response. when the remote robotic something, yeah. that really feels like it is underneath my hands. how does it compare to the robots that seem to make all the headlines these days, those from places like austin dynamics? we have

only done this up to seven years. we are much younger. at our hardware is better. we started using electro motors for dynamic motion. after we are showing robots, i think eventually these kinds of machines will be much more useful and safe. 0ur motors are different from those defined in a factory. those cannot c0 nse rve defined in a factory. those cannot conserve energy. as defined in a factory. those cannot conserve energy. as you defined in a factory. those cannot conserve energy. as you can see, our robot is landing injumping by itself. -- and jumping. robot is landing injumping by itself. -- andjumping. they certainly can, as demonstrated by this exclusive look at a previously unseen manoeuvre. you cannot hear

it, but our cameraman swore there. it wasn't pretty. but it recovered. i know people who could not handle the mccaffrey there. —— the recovery. they have already pulled off some pretty spectacular moves, but before we get too confident, let's remember this is still a work in progress. i think it's time to hand over to lara. augmented reality

experiences seem hand over to lara. augmented reality experiences seem to be all around us. but how close are we to being able to create our own? adobe's project hopes to bring it to the masses and i have managed to get a pretty of the prototype. unlike other products, they are starting off by releasing a professional version. the animated image first needs to be created in photoshop and then moved into adobe's 2d and 3d tool dimension. the end result gives quality they hope exceeds many other ar solutions out there. long—term, though, the hope is something simple will be available for anybody to create the assets themselves. the aim isa create the assets themselves. the aim is a platform agnostic finished product. we request would we wanted to do here. what would it mean for

this journey into a new ar world?|j this journey into a new ar world?” think, really, for apple, taking such a big push for ar, it is such a big detail. adobe getting involved isa big detail. adobe getting involved is a big move. they are all about making tools that make contact easy. it makes complete sense that as this new medium emerges they would want to get involved in a creative tool to get involved in a creative tool to make it possible for creatives to make content. but if what you really wa nt to make content. but if what you really want to do is create your own simple augmented reality, maybe using something like a child's favourite toy, i found an app that should be able to help. clone allows you to make treaty assets which can be exported into different formats. —— sd. exported into different formats. ——

3d. you can put it into an ar world. you go to website and print this off. if you have a recent version of ios you will not need this if you are using an iphone, but with some other phones you will. i walk around the object to film this so it recognises every part of it from every angle. this is a little bit time—consuming. there, got it. a 3d version of this drought. it can be edited in the application. —— the giraffe. there is more to ar than just butterflies and giraffes, but for now, we are perfecting how we are going to create it. that was

lara. and just as augmented reality is moving into the realms of artists, the movie industry is also feeling it's —— its effects. in 1902, movie—goers were thrilled by the trip to the moon. this is the seminal silent movie which amazed audiences. camera trickery and visual effects have brought magic to the movies. these days, visual effects artists have an enormous amount of tools that there is little thanks to computers which can bring the fantastical to live. —— their disposal. virtual actors and digital images capture stunning images in camera. that is a major bonus for movie directors. that is precisely what this technology allows directors to do. the ar wall

replaces the back of a movie set with what looks like a pretty cg image played on a scene. the ar system is live tracking a camera using hacked together virtual reality gear which is able to send to the camera is moving and, you know, at 1000 hertz a second, and then adapt the movement of the camera to create an illusion that is appropriate for the changing perspective of the camera. michigan avenue preceding the 42nd precinct. in the heyday of hollywood, techniques like rear projection allowed actors to perform an environment which were much more co ntrolla ble environment which were much more controllable than the real world. with traditional rear screen projection which i was a huge fan of growing up, the illusion has been around for decades. there were limitations do it. the screen can

sometimes look washed out in a rear screen projection. the ar wall seeks to give the camera freedom of motion so to give the camera freedom of motion so you to give the camera freedom of motion so you can to give the camera freedom of motion so you can just use it hand—held however you want. lots of movies currently used green or blue screens for this purpose. and some films even go so for this purpose. and some films even go so far as to shoot entire scenes in green or blue screen, adding computer—generated effects like effects and characters in postproduction. it allows for a massive degree of flexibility. as far as effects are concerned. not now, jean claude. but achieving the effects of cg virtuosity as seen in modern block us as is very intensive. —— blockbusters. this man wa nted intensive. —— blockbusters. this man wanted to make a film, but he had a limited budget. 0ut

wanted to make a film, but he had a limited budget. out in wanted a developed technology that lets you feel very kinetic and animated characters running around the ca twa lks characters running around the catwalks of a city, having the camera person followed the act is spontaneously. —— actors. not with preplanned camera moves. making this film would normally rip why are expensive green screen work. normally, the city would be added in postproduction. best deals allow them to create a technique to bring a multi—million dollar vision to the screen for a fraction of what it would normally cost. is created... for a tsars, they are usually having to imagine what will fill the green space. —— actors with this technology we can protect it straight onto the movie screen.

actors can see exactly what movie they are in. that was mark in la. finally, with wimbledon starting on monday, i thought i would get in some practice on a court. and, of course, i brought along my robot buddy. it autonomously patrols the court and collect the balls you lobbed, smashed, or in my case, mishit. for any ball boys and ball girls, worrying about theirjobs, do not worry. this is about people who are practising in two are not very good. you can carry on practising. it will pick them up while you are busy being rubbish. its on board

camera spots the balls and the partner at the net keeps track of things too. it also has a handy and detachable basket. you can take it to the car and no one will ever suspect that you are the laziest tennis player alive. and that is it for this week. were hanging around in the us for another click next week. join us for that. in the meantime, you can join week. join us for that. in the meantime, you canjoin us at bbc click. from my robot buddy and me, see you soon. hello there.

for the fifth consecutive day, temperatures in the uk got above 30 degrees on friday and there could be more to come over the weekend. still plenty of heat, plenty of sunshine butjust the chance for the odd downpour, particularly on sunday. because, if we look back at the recent satellite picture, you can see this area of cloud that's just been swirling around across iberia — this more unsettled weather is going to drift its way northwards, clipping into the south—west as we go into sunday but for saturday, we are gonig to be drawing in some very warm airfrom the near continent. so those temperatures are going to stay very high. we start the day between 11 and 15 degrees — notice a bit more in the way of cloud rolling its way in from the north sea. that could take a little while to break up through the morning. so if you're out and about through the first part of the day, there'll be a bit of cloud around but the sunshine will get to work and there will be lots of it as we get into the afternoon. blue skies, strong sunshine with high uv levels, high pollen levels as well. and as far as the temperatures go, look at the extent of the orange shades on our temperature chart — widely in the mid—to high 20s, some spots perhaps to the west of london, maybe west wales, again could get up to 30 degrees.

a little bit cooler perhaps for some of these north sea coastal areas. as we through saturday night, notice the way that the orange colours try to hold on down towards the south. whereas the last few nights have been cool and fresh, saturday night into sunday morning will be a little bit more muggy, a little more humid — 16 in cardiff and in london. not as muggy further north — 9 there in newcastle. but we are going to see more in the way of muggy air wafting its way in from the near continent as we go on into sunday. also this area of low pressure starting to churn its way towards the south—west of the country. so here we could see some showers across the south—west of england, into wales, maybe the midlands, maybe northern ireland. also a weak frontal system which could bring rain into northwest scotland. but everywhere else sunny skies, again and remember that warm and humid air — the orange colours anly getting deeper, really, across the south—eastern areas. temeprature on sunday afternoon in london up to around 31 degrees. welcome to bbc news —

broadcasting to viewers in north america on pbs and around the globe. our top stories: just hours after reaching a deal, european leaders disagree about who should take in and process migrants coming into europe. police in maryland say the gunman who shot dead five people at a newspaper office would have killed even more, if he'd had the chance. canada fights back, imposing billions of dollars worth of tariffs on american goods in response to president trump's steel duties. and and atjust four years old, this young painter is taking the art world by storm — one colorful canvas at a time.