the judiciary committee of the us house of representatives has voted to hold the attorney general of the united states, william barr, in contempt of congress for refusing to hand over the full, uncensored report on russian election interference. and the senate intelligence committee has subpoenaed donald trump junior to testify in its own russian investigation. the first detailed study of the world's longest rivers shows most of them choked by human development. researchers found only 21 of the 91 rivers with a length of more than a 1,000 kilometres still have free—flowing access from their source to the sea. football — and in the second extraordinary comeback by an english team in the space of two days, tottenham hotspur have beaten ajax by three goals to two in amsterdam. it books them a place in next month's european champions league final against liverpool in madrid.

it's 2:30 am. you're up—to—date with the headlines. —— 3:30 am. now it's time for click. this week, it's 56 whiz, with superfast connections, connected cows — and also the end of the world? whenever you're out and about, your mobile phone communicates with the rest of the world through these. calls, messages and data are sent from masts like this to hundreds of phones within a few kilometres and each of those phones send calls and data back again.

it's a lot of work for one mast to do and it kind of explains why if there are too many phones in any one area, things start to slow down. but it won't always be like this. our next mobile network will be the fifth generation, called sg. and it will be very different to what's come before. 16 was about the analogue phone, allowing us to make calls to one another. zg allowed us to do things like send sms text messages and do voice recording. 36 was about the promise of the smartphone, allowing us to access digital broadband services. and ag, which is what we've had since 2009, allowed us to do all those first three things but faster. 56 is like going from earth to mars. it's not a faster world, it's a different world. it's going to be a world that is connected, in which machines will be talking to each other and talking to you. and to achieve that, we are going to have lots

and lots of antennae everywhere. 0n lamp posts, buildings, you name it, it's going to have an antenna on it. and that's because there are billions and billions of new devices waiting to be connected that will communicate with each other, work with each other and make our lives easier in ways that we can't yet imagine. tv off, lights off. machine: tv off, light off. it will allow you to control your energy consumption in your smart home. it will allow your fridge to decide when to order groceries for you and have them delivered by a self—driving truck. it will allow your dishwasher to decide when it washes dishes, your laundry machine decide when it washes clothes. so right now, we have to instruct our machines but in the sg worlds, our machines might decide to communicate directly to us or with each other. the machines will start communicating simply to regulate

the flow of human activity. your car is going to be connecting and thinking, interacting and communicating with every other sensor that happens that's walking down the street as it passes a building, as it passes a somebody on a bicycle. information from a traffic light three blocks down that you can't even see yet. it's going to be completely seamless. 56 will enable all these devices to have superfast data connections but we also need them to be stable connections as one device hops rapidly between all of these antennae. how rapidly? well, maybe this rapidly. this is the millbrook 56 test bed. one of the things i'm testing here is how well 56 antennae can follow a moving target. there is an antenna and i'm the target. i am making a live video call to the computer trackside

which is actually really hard to do when you're moving at speed. at 140 miles an hour, each antenna can only send stuff to my special sg hotspot in the car for about four seconds and so here, each one has to form a beam which targets the car exactly and then hands over the service seamlessly to the next antenna, all without interrupting the video stream. the kind of technology that blu wireless is testing here will eventually enable high—speed trains to stay connected to the 56 network and provide superfast internet to their passengers. to coverjust this small area, they are using 11 antennae here so if you want to blanket the whole uk with 56, you are going to need a huge number of the things. i mean, this is a massive infrastructure rollout.

and the scale of all this is something being grappled with around the world. in the us, verizon has stepped up its trials in us cities, albeit only over small areas. speeds, when it works, are impressive, although the trials are said to have had some teething problems. cities in south korea and china could well get the first meaningful services but what about if you're not in a city? well, back in the uk, jane copestake has been looking at what 56 might mean for rural areas. in this idyllic patch of british countryside, the birds are cheerfully singing and the cows are peacefully grazing. but look closer and you will see there is something very different about these cows linking them to a unique experiment. this dairy farm in somerset is one of the first test spots for 56 in the uk. the cows are wearing sensors and all this data is being sent

to the cloud and then back to the farmer who can make decisions based on this data. almost every task on this farm can be automated. these cows are queueing up patiently to be robotically milked. this system allows the cow to choose how many times a day and at what time it wants to be milked. the robot picks up on how much milk is coming from each of the cows udders and can control the sensitivity of the milking as well. the cows here come and go as they please, with little human interaction in their movements. so one of these cows has just taken itself for a massage. the feeding system is also done by machine, and that's not all. there is even a robot that scrapes up excrement, putting it into these channels which can quietly operate around the cows so as not to disturb them. duncan forbes runs the farm. he's been working with cisco on this project which is part of the uk's sg rural first strategy. the farm is chosen to demonstrate how 56 would help bring together the many different points of data

across a herd of cows. low latency and the ability to cover large distances with 56 means that the cows can be monitored in real time, even if they're grazing in the field. what senors is she wearing? can we see any of them? 0n the collar, there is a little black square that says "fa milk silent herdsman" on it so that's one of the sensors and it's an activity monitor. like a wearable, like a watch. yes, but the sort of thing it does is tell you when the cow was eating, so there's an inclinometer, so when her heads down, it says 0k, she's eating. she's got the green one, the transponder underneath her chin. and that's the one that controls the gates and so on inside the building. it's an electronic identity. the third one isjust inside her rear, the little white button on the top of the ears is holding the sensor.

so these cows have got more sensors than you would necessarily have on an ordinary cow because we are trying it out, we are testing them and we are checking out their connectivity. here, we're on a dairy farm and we're using the technology to help us with our animals but we're also going to have sensors around the fields telling us what the soil moisture is, what the temperature of the soil is, measuring the grass growth, using satellites or hyperspectral imaging to measure how much grass we've got but also saying, maybe we don't need to use quite so much fertiliser. 56 could revolutionise the farming industry, connecting notjust the uk farms but farms around the world so best practices can be compared and new techniques developed. imagine if you would be able to cross—correlate data, not only about how a cow is doing well, if it's sick within the farm but across multiple farms, across multiple areas. imagine the efficiency you could get if you were able to manage the robots based on the best possible efficient way of doing it instead ofjust within a farm.

one of the biggest challenges for farming worldwide is the expected increase in world population where we're going to need to produce 70% more food than we were producing in 2009 by 2050. that's a massive increase. we've got to produce that food without additional impact on the environment, preferably less. a byproduct of bringing the sg network outside of cities could be a revolution in connection speeds of the countryside. a recent national farmers' union survey showed only i7% of respondents reporting a reliable outdoor mobile single and only 16% saying they had access to superfast broadband. the farmers here hope to make a strong economic case for bringing connectivity to all parts of the country, no matter how remote. hello, welcome to the week in tech. a drone has, for the first time, delivered a human organ.

surgeons in maryland received a kidney transplant from about three miles away. and facebook ceo mark zuckerberg announced new measures to improve users privacy as he laughed off his company's recent failures. we have the strongest reputation on privacy right now. updates include a friend feed free of adverts and an encrypted messenger service. meanwhile, the uk government is preparing to plan new laws that will mean that all internet—connected devices need to have cyber security features built in. it proposes all devices sold in the uk come with unique passwords, state how long they will receive security updates for and provide contact details to report vulnerabilities. we may have seen ai—generated faces before but how about entire—generated people? well, meet this lot. these photorealistic images byjapanese company datagrid come complete with faces,

hair and even outfits. and finally, if you haven't worked up an appetite for lab—grown meat, then how about a spot of lab—grown fish? singapore start—up shiok meats won't be scrimping on the shrimps after raising $4.6 million to keep working on their cell—based delights. but are you ready to dive in? to build the 56 network, you need a new type of telecoms gear. you need many more base stations and they need to be smarter. it is the chinese tech company huawei which makes the most advanced sg gear but this has been making western governments nervous, so i've come to find out — who are huawei? it may look like paris but this is huawei's brand—new campus in shenzhen, china, a huge site where employees take a train between office buildings,

each of which is modelled on a different european city. fewjournalists have visited this disney world—like project, very much the brainchild of ren zhengfei, the company's founder. he's compared to the likes of stevejobs, growing his company from a small workshop into a tech giant now employing 180,000 people. huge spending on research means huawei claim they are now around 18 months ahead of any other 56 manufacturer, and that includes not just getting faster and faster data speeds but dealing with the problems that come from higher performance. so this is the sg wireless base station.

the 56 power is around 1,000 watts. and how much bigger is that than a ag base a station? a ag base station's average power of 300 watts. so it's three times larger. so this uses three times as much power, so it gets hotter. yes, much hotter. it's a common problem in technology. as things get faster and they consume more power, they get hotter, and new cooling techniques need to be developed. this is liquid cooling cycling. is that liquid boiling in there? it's bubbled. here, they are learning how different designs and materials can change the speed and direction that heated air flows away from the components. and here's an experiment to try and keep everything at a stable temperature, by either applying heat or cold on demand. that's gone cold.

yep, that's hot. huawei is currently enjoying huge success, with revenues last year in excess of $100 billion. but this is also a company facing some serious issues. the biggest is that the us is coming for huawei in a big way. we have met the enemy and it is huawei and it is china, make no doubt about that. right now, huawei, through access to unlimited capital from the chinese government, the communist government, all of this technology, guess what, it's built in for cyber spying, for cyber espionage because that's what the chinese do. the problem is, mr ren was once a member of china's people's liberation army and that's raised suspicions about his links to the chinese state and whether it and huawei make have each other‘s backs. america is adamant that huawei is a pawn of the chinese authorities.

humans in 2017, china passed the national intelligence law which says that if asked, all chinese companies and citizens must help the government to assist national intelligence efforts. china claims this is part of an effort to safeguard its security. but the fear is that if huawei supplies any country's 5g network, the chinese could exploit it. to help the government decide whether huawei should be in the uk's 5g network, the british security services have a special unit devoted to looking at the potential risks posed by huawei. it is overseen by doctor ian leavy, hisjob is to defend the uk against digital attacks. he rarely gives interviews. does huawei pose more of a security risk than the other companies that

supply the network infrastructure? i think what we're talking about is, assume that chines state wants to attack the uk telecoms networks. 0urjob is to try and make them work just as hard regardless of whether we use huawei kit or not. many people think the chinese state would love to eavesdrop on other countries. if we let huawei into 5g, is that a real danger? it's no more likely to have spying or communications in 5g that it is in ag, and anything that is critical, whether it's government, business, even personal communications should be encrypted. so, you know, all of the communications with your bank from your smartphone, they are all encrypted because you don't want to trust the wi—fi and the telecoms networks. so if someone is listening on the line, they willjust get garbled gobbledegook? yep. and it's the same for critical stuff in business, in government, in control systems. so, according to gchq, the threat of spying that we've heard so much about recently is overblown. but there is another threat that they take very seriously. in a future where our entire infrastructure, our economy and our lives are run by computers

talking to each other over a 5g network, what would happen if someone shut that network down? if you think about it, the future of warfare is not necessarily going to be using traditional armies in the way that we think of, like with the second world war. the future of welfare is most likely going to be cyber, so without firing a shot, you could take a country out. it's feared that the chinese state could order huawei to build secret backdoors in a 5g network. these would leave the country vulnerable to a nationwide cyber attack. and that could be catastrophic. what we are about to show you is what experts have told us could happen if the uk's 5g network was attacked in the not—too—distant future.

i don't know, the station's been shut for nearly an hour. there is no information, there are no buses. it's a nightmare! inaudible. tell me where the trouble is? m11 has completely stopped, the m1 and ma are both backing up. no accident? nothing. can i get through to traffic please? hey, can you hear me? the traffic‘s gone crazy! michelle? are you still there? i've got police and ambulances stuck everywhere, the national grid are gonna shut things down, it's a terrible mess! within the last hour, bbc news has received hundreds of reports of widespread disruptions across the uk, with numerous services being affected. i don't know, it's just flashing,

i don't know what's going on. it's just not driving. many roads are blocked after a variety of self driving systems deactivated. the government is advising only to travel if absolutely necessary. many shops have had to close due to being unable to take payments after the pay network went down. the ultimate cause of the disruption has yet to be confirmed. what's going on with the feed? can we get them back up again? can we get the feeds back up? they are offline! we are also hearing that the smart grid has been overloaded and power supplies are being hit nationwide. like everyone is just turning all their appliances on and off randomly. guys, listen up, national grid are going to shut down midlands and the north, 0k? that's going straight away. lights on. lights on!

sirens blaring. tv on? tv on. this is being considered a national emergency... as soon as we recieve any information, we will, of course, share it... static. this is a worst—case scenario but it is possible. so, would huawei deliberately expose their foreign customers to beijing—backed attack? translation: the chinese government explicitly requires all chinese companies to strictly follow local laws in every country they operate in. the chinese government has never,

and will never, ask any chinese enterprise to install backdoors. i can say with certainty that huawei has never installed backdoors in its equipment in the past, and neither will we do such a thing in the future. but, the latest gchq backed report published in march found that there are security holes in huawei's equipment. what was the overall result of your report into huawei? the security engineering is unlike anything else. it's engineering like it's back in the year 2000. it's very, very shoddy, and leads to cyber security issues which we then need to manage long—term. do you have any evidence that the vulnerabilities that were in huawei's products were put there deliberately? we do specifically say in there that we don't believe the things we are reporting on are the evidence of chinese state reasons. so it'sjust bad engineering? poor engineering. poor engineering and bad software

practices come in many guises including incorporating other compa ny‘s code which itself, isn't safe. the reason you have to be so sure of what is in a build of software, if it's called, where all the components that go into the software, is precisely because these days a lot of that software is from third parties. so you need to be sure that when you buy your bit of equipment that is running a bit of software, that the person that has built that software for you has done their due diligence and they know precisely what they put in and check that it is secure. and the problem is, how ever these vulnerabilities get into a network, whether deliberately or because of bad engineering practices, they can still be used to attack it. huawei don't deny that there are problems with their security. and they have told us that they will release more detailed plans on how they will address them early in the summer. you don't need to spend a lot

of time in china to see that the power is definitely shifting. just a few decades ago, shenzhen was a fishing village. today it is a megalopolis of around 13 million people, home to china's tech revolution and transformed by china's ability to push things through without consultation with its citizens or its companies. within the last year, every single taxi and bus in this enormous city has gone electric. this, just one result of china's ability to push things through. while the uk has been anguishing over hs2, thousands of miles of high—speed rail have been built linking shenzhen with other cities across the country. so it's clear the chinese are making massive strides in high—tech. we are being told that in ten years time we will regret letting huawei in, but conversely, in ten years time, might we regret not riding the wave with them?

after all, i think it's fair to say that china's time has come. hello there. wednesday was a thoroughly wet, cold, windy day for many areas. further south we did see the sunshine appear through the afternoon, but that gave way to showers and some thunderstorms with hail. all tied in with this area of low pressure, which is slowly moving out into the north sea, although its weather fronts will continue to affect parts of the country as we head through today. now, early on today it's going to stay quite damp across parts of scotland, northern england, with persistent rain, still quite a breeze blowing in off the north sea there.

but northern scotland will start dry with clear skies. so here another cold one with a frost out of town. but further south, because of more cloud and rain around, then it should be a less cold start. so for thursday, it will be a damp start for many. a lot of cloud around. the best of the sunshine across the northern half of scotland. winds will be generally lighter across the uk as that area of low pressure continues to pull out. but into the afternoon, i think it will be a mixture of sunshine and showers for northern ireland, for much of england and wales. though the far south—west to stay dry. we'll see top temperatures of 1a—15 degrees in the south. as we head on into friday, the low pressure continues to pull away. although this weather front will continue to bring showers mainly to central parts of the uk. but winds will be lighter still on friday, so we'll start off on a fairly cool note. there will be some sunshine around. but as those temperatures rise then showers will also develop, some of them could turn out to be heavy ones. again, southern scotland, northern ireland, into the midlands, northern england as well. i think the south—west

should stay largely dry. highs of 15 or 16 degrees. and a little less cold across scotland. now into the weekend, it looks like high pressure is going to start building in, although there will be northerly winds on its eastern flank for a while, so it will stay quite chilly into the weekend. but then as that high pressure moves a little bit further eastwards we'll start to draw up some warmer southerly winds. so it's a slow process but this weekend looks like it will be turning drier and it should turn a little bit warmer as well, particularly beyond sunday. now for saturday, it's a chilly start in those northerly winds, quite bright with some sunshine around. but we think showers will develop — mainly across eastern areas. and some of these could be quite heavy. the best of the sunshine further west. and in the sunniest sports across the south—west we could see 16—17 celsius. a little bit warmer further north too. sunday, i think we will start off chilly again with some sunshine. cloud will develop here and there.

the best of the sunshine again further west, closer to that high pressure. a little bit warmer across the board, with highs of 17—18 celsius. beyond sunday into next week with that high pressure building in, southerly winds, turning warmer with some places seeing the low 20s.

welcome to bbc news, broadcasting to viewers in north america and around the globe. my name is mike embley. our top stories: held in contempt — us democrats vote to officially condemn the attorney general for refusing to release the full mueller report. the first detailed study of the world's longest rivers show that most of them have been choked by human development. another footballing fightback for an english team. tottenham beat ajax to join liverpool in the champions league final. and after the world's first glimpse, now a name for britain's new royal baby — archie harrison mountbatten—windsor.