a 19—year—old former student, who'd been expelled and was not supposed to be allowed back on site, has been arrested. president trump tweeted that no—one should ever feel unsafe in an american school. south africa's governing anc has welcomed president jacob zuma's announcement that he's resigning. he said he was stepping down to prevent any violence being committed in his name. he's faced allegations of corruption. the anc‘s new leader, cyril ramaphosa, is likely to be voted in as his successor. morgan tsvangirai, zimbabwe's main opposition leader, has died. the 65—year—old former prime minister had been suffering from cancer. mr tsvangirai and the party he founded, the movement for democratic change, repeatedly challenged robert mugabe during his long grip on power. now on bbc news, click. this week — uber the top. old deckard meets new...who?

and smile, we're in dubai. this is how a self—driving car sees the world. lidar sensors feed the car with a continuous 360—degree view of its surroundings, along with crucial depth information. it is the key technology for a successful autonomous drive. and this week in the us, a mighty court case has begun which may take this key away from uber, stalling its progress towards the self—driving revolution.

it is now ended on friday as the two sides agreed to stop locking horns and work together. an out of court settle m e nt and work together. an out of court settlement seems to have sealed the deal with that roadblock removed, there was plans to taxi is a driver area there was plans to taxi is a driver are a step closer. lubricant in use to look to the future of transportation, which in just to look to the future of transportation, which injust a to look to the future of transportation, which in just a few yea rs, transportation, which in just a few years, might look very different to the way it looks now. dan simmons has been looking up. even self—driving cabs will get stuck in jams, so this is uber‘s vision. when you're tight for time, go by air. it's ambitious

and so is the time scale. our goal is, by 2020, to launch our first demonstrator flights in dallas and los angeles to show that, as a concept, this can work, and then work to scale by 2023 and 2025, so we're providing commercial flights to a lot of our riders, giving them a new way to travel. one of uber‘s partners, bell helicopters, has showed off its design for a a—seater cabin, which could include a pilot. here's their 360—view, with the alternative setup — four seats, four passengers. the aircraft, like our cars, would navigate automatically. it's electric with a range of about 60 miles, they say. now, we've seen other designs for air taxis of late, including chinese firm ehang's184, which recently shuttled actual people in this autopiloted drone. and this aircab by german firm volocopter, which uses 18 rotors

and 9 separate battery packs, just in case. while nasa and the faa are working on new air traffic control systems for these type of craft in the united states, it's the faa that will have to be convinced self—piloting electric air cabs are safe. we will ask the applicants to come forward with their engineering proposals of what tests will they propose to do so that we can ensure that if there's a fire or a short or if something goes wrong during a flight, that somebody can safely land and get away from that aircraft before it does damage to the people on board the aircraft, or on the ground, for that matter. so, will it work? here's uber‘s case study. we've landed in la. traffic's a nightmare and a taxi would take us 80 minutes. whereas the air trip to the sky port, plus a short transfer, is less than half an hour. and uber says it could end up costing about the same amount.

0k, there are many reasons why self—flying electric taxis sound like a good idea, but when you're saving less than one hour, uber‘s dream will need to run smoothly to deliver. apologies, mr simmons, very busy airspace right now. it's blade to blade up there! bleep. unfortunately, the weather's closing in, mr simmons. i'm not quite sure we're going to get you in tonight. bleep. really sorry. we're just cleaning out the cabin. bleep. you're two kilos over, i'm afraid. might want to lose the penguin? bleep. ah, we're just recharging your taxi at the moment, mr simmons. it will be a while.

at least that last one shouldn't be too much of a problem. uber have teamed up with ev specialists charge point and are predicting a 4—minute juice—up time. now, that would be special! sorry, you're running 17.5 seconds late and the pilot's had to cancel. please do book again via the app. perhaps the most challenging part of this project is to get us, the public, comfortable with the idea of taking an air taxi. when we think about consumer adoption of new technologies, this is not a problem that is novel or unique to travel. we saw this with elevators when they first came out and, actually, in order to get consumers comfortable with it, an elevator — an elevator operator would remain in the elevator, even if after it was made electronic, just to give consumers comfort.

we're going to be doing the same with autonomous vehicles right now, as we have safety drivers staying in the car, explaining this sort of technology to riders, and the same will be true with our pilots. we'll be launching with pilots who will serve not only as the operators of the flight, but as an ambassador to get riders comfortable with this new mode of transit, so soon enough, they'll forget about its novelty and be back to texting and making other use of their time while in transit. just like the uber—waymo court case over who owns the specialist tech that makes self—driving cars work, the creation of the flying cab will no doubt have its own dogfight in court — perhaps that's another reason why uber‘s keen to get in early. that was dan. now, the first place that we're expecting these flying cabs to take to the air is, of course, the city of dubai, which always promises to foster and allow trials of new technologies. although when we visited last month,

it soon became clear that flying taxis there too are still a few years off. but one big change that is being unveiled is not to do with aircraft, but with its airport. kate russell has been looking at what's new in arrivals. dubai international is the world's busiest airport for international passengers. nearly 90 million people went through it in the last year and in the next couple, it plans to expand annual capacity by one—third again. this airport has two runways, it has three terminal buildings and four major concourses, but we have room for no more. so whatever growth we take from this point forward, it has to be done with the existing infrastructure. so dubai international has decided if you can't get bigger, you have to get smarter. i was invited for a peek inside its brand—new airport command and control centre, just before it becomes fully operational. this airport has been kitted out with the latest camera equipment

to help staff predict the flow of passenger traffic. the technology is kind of cool. what it does is it uses 3—d cameras in the ceiling and it looks for the outline of humans on the floor, moving around, and then it tracks them through the whole process. airport staff can get this information on smartphones and tablets, which helps them to direct the crowd, open new gates, and even tell passengers where their baggage is. while all this data helps keep the airport moving, the amount being collected is also causing some issues. already, there's 7 billion data points in there and we've yet to connect it up to everything. so we've still — we've got baggage data and passenger data but we've yet to put in things like energy consumption and water consumption. and once we bring that together, we can really optimise the airport and make it more efficient and drive for even more passengers. so, what do you do when you need a data centre in a hurry? well, building one inside shipping containers

is definitely one solution. as dubai prepares to play host to a massive world expo in 2020, the airport had to do some quick thinking to be able to handle the extra 10 million passengers a month. this solution took just over 12 months to build. a traditional data centre, built out of bricks and concrete, would normally be about two to three years. next on the list of high—tech upgrades is face recognition to clear immigration quickly, al to predict seasonal fluctuations in demand, and a system to tell passengers when their baggage will hit the carousel — all great news if you're passing through the airport, but there's a solid business case for all these upgrades too. the more passengers we can put through this site, the more profitable this airport will become, and it's betterfor the city, it's better for the economy. so we're really working hard to make sure we maximise the use of this dubai international site. with aviation projected

to contribute almost 40% of dubai's wealth in the next couple of years, this airport will continue to be a vital part of the economy. flying high isn't fun for everyone, though. 0oh! hello, world. acrophobia, or fear of heights, is one of the most common phobias, but this virtual reality therapy hopes to help. sweating again. chan here can confidently fly a plane, but when it comes to heights in general, it's a different story. oh, no... oh, i've got to move! come back, come back. no, i can't do it. come back. i can't move while i'm out there. i need to be back here to do that. i couldn't go up a ladder. just couldn't go up a ladder. i couldn't go over high bridges. if i drove to wales,

i went round the long way, instead of going over the bridge. ijust don't like open heights. but i canjump in an aeroplane and fly an aeroplane. that's a different — completely different environment — in my head, anyway, it is, that's for sure. welcome back. oh, god! oh, it's dark! so, how are you feeling? um. . .anxious, sweaty, nervous. even though you've been through the process of doing this before? yeah. you still feel the same level of anxiety doing that now, or is it dramatically reduced? i'm way more confident. i've got much more confidence than when i did it the first time. i was on holiday with some friends. they were going on the roller—coasters and i talked about this vr thing that we were doing and they said "well, then, you should be able to go on the ride." so i watched my family and friends go round a couple more times and then thought, "well, i can do this." if you look to your left, you'll see a basket of light balls.

what i need you to do is throw the light balls down into the atrium. i think vr can treat pretty much any type of fear or phobia. so it might be a fear of a cat or spiders or dogs. what vr can enable you to do is relearn that, actually, you're safe in the situations you fear. the beauty of vr is, in fact, that disconnect. when you're there, you know actually you're not really in that environment and that enables you to do things you wouldn't normally do in the real world. but all the scientific data says that learning you make in vr does transfer into the real world. in this programme, you are going to try a series of tasks. earlier this month, it was announced that the uk's national health service has invested in this idea of using virtual reality therapy to battle severe mental health issues by putting sufferers in a virtual environment they would struggle with in the real world. this immersive approach, plus the availability of virtual therapists, could more readily

provide more therapy to more people at a lower cost. at the heart of all mental health problems are difficulties with interacting with the world, and with vr, we can put people back in the situations that trouble them and coach them in the best ways to think, feel and behave in those situations. we've got to test it, we've got to trial it and we've got to make sure things work, but the potential is enormous. hello and welcome to the week in tech. it was the week police in china donned special sunglasses to catch crooks using facial recognition tech. british mps went to washington to talk fake news with facebook, google and twitter. and virgin moneyjoined lloyds bank in banning customers from buying bitcoin with their credit cards. the cryptocurrency had another fall this week, falling to as low as $6000, before recovering. that's down from a high of almost $20,000 in december.

it was also the week that spacex rocket, the falcon heavy, blasted into space. elon musk sent it off with his old cherry red sports car, a tesla roadster, a space suited mannequin, and a david bowie soundtrack on repeat. however, it wasn't all good news for tesla, as the electric car company also posted its biggest ever quarterly cost — almost $700 million. it says it's addressing production issues with its model 3 car. and finally, a 14—year—old has created an app to help people with alzheimer's disease. it uses facial recognition technology to help people remember their loved ones. they can scroll through photos of friends and family and the app lets them know who the person is and how they're related to them. you can also take a picture of someone you don't recognise and the app will try to identify them. now, if you are a film fan, you will know that it is awards season, and over the next few weeks, we'll be chatting to some of the real heroes behind the movies nominated for the best visual effects 0scar.

first up, blade runner 2049 — and spoiler alert, if you haven't seen the film, you might want to go and make a cup of tea for the next four minutes or so. still here? good. well, if you have seen it, then you'll know that the character or rachael, from the original movie, makes a surprise appearance, looking exactly like she did in 1982. we found out how. i had yourjob once. i was good at it. things were simpler then. a lot of the work we do in visual effects is kind of very broad and very strong, think about the monsters screaming towards camera. this was the complete opposite, it was very subtle stuff. so it was all in the kind of micro details of the face. so the biggest challenge

is with the emotional performance and in this case, she was talking, so she was delivering lines. don't you love me? we did three shots from the original movie. that was kind of like a proof of concept that our digital rachael was good enough. we showed it to denis, the director, and the studio, and they couldn't really tell the difference and then — or you know, they had to struggle to see which one was digital. that's kind of when we knew we had it in the bag and that she was good enough to hold up on the big screen. we had sean young onset in budapest, so we scanned her and get another photographic reference of her as well. and what that allowed us to do was to fit a digital skull inside the digital model we had of her. when you age, obviously your soft tissue drops down with gravity and you get wrinkles and so on, but you skull doesn't change, so your skull is pretty much the same. what that allowed us to do was that we had a digital skull and we kind of built our 23—year—old

sean young from 1982 around that skull, so the cheekbones, the forehead, the chin, the nose, so on, we could kind of fit it around the digital skull, which was invaluable reference for us. and that kind of ensured that we had a physically correct model to sean young's real skull. we also captured the performance of a body double, so it's her body that's used in shots. so we had a lot of kind of treated data to work from. the good thing about the treated data is we can rotate around it on the computer, we can look at it from all angles. when it came down to doing the actual performance, it was all hand animated because basically, denis, the director, he wanted to basically direct a normal performance,

like he would do onset with a regular actor. we can make a still image look very, very photo real and good, but getting that believable animation, that's still the biggest challenge. i know you're here. great film, and next week, we'll be talking to the oscar—nominated visual effects supervisor of marvel‘s space epic, guardians of the galaxy volume 2. all i can say is, "i am groot". back in dubai, i'm really starting to see how determined this young country is to lead the world in everything smart. i have already seen the high—tech police force in action, met the robocops, and the drone unit

that will watch over everything from the sky. now, i'm meeting the world's first minister for artificial intelligence, and he's ambitious about what comes next. one of my favourite sayings from the tech industry is larry page of google said, "almost every time we do something crazy, we make progress. " do you find the same thing? many of the ideas that they come up with, notjust silicon valley, even the top tech companies from around the world, whether from the uk or china, the common denominator with all of them is that they do not fear something that seems impossible. they come up with ideas that might seem crazy at first, but then the impact of these ideas will be truly global and phenomenal. so with that mentality and with the idea of let the brightest minds from around the world come, let them thrive here in the uae and let them create something for the rest of the world. how do you make sure that you bring all of the people of the uae along

on thatjourney for digital change and innovation? the uae is very unique. we have a very young population, that population can be retrained and repurposed in positions that will be created, i think, in the future. we understand the opportunity for us to lead the future. we launched an initiative in 2017 called the one million arab coders initiative. we're teaching 1 million people how to code. this is the language of the future. i think making these coders into our special intelligence experts is going to be a difficult challenge, but it'll be something that's easier than training someone who does not have any understanding when it comes to the language of the future, which is coding. so think about what apple has done for the iphone and what google has done for search, that, hopefully, is going to be what the uae is going to do for governance. dubai is a place not scared to adopt new ideas orfail trying, so it's throwing all of its might behind leading edge innovations. concepts that may look outlandish elsewhere are all welcome here. and the dubai future accelerators programme is what the government

hopes will take these ideas from page to stage. the government can drive the vision of where dubai goes next, i guess more like a company than a country. after all, the monarchy needs little in the way of democratic input. a majority of this can fail, but the moment you create one success story, the sky's the limit on where you can be. so as long as you have that kind of mindset — a ton of this will be a write—off — but once you have that success, the whole world will talk about it and you will become a platform. we believe regulations, or amending regulations, in favour of any innovation is a must. entrepreneurs struggle a lot to show their new technologies and whatever they work on, and to have those decision—making individuals and the government work hand in had with them to really disrupt, makes life — makes the growth process much, much faster.

so dubai mayjust have the recipe to pull it off, an accommodating leadership and a lot of cash. this may be the perfect place to fail and come back smiling, especially as the government is committing to make dubai the happiest city in the world, alongside the smartest. visiting the dubai smart office, i was suitably welcomed by farah... mrs kate from bbc click, your host is waiting for you. ..who took me to meet one of the leading technology champions in the country, and despite the reputation the country has on the outside, it made me very happy to discover she's a woman. the technology is not the end of ourjourney, it's only a means that will take us to improve people's lives and make them more happier. by having artificial intelligence

agents embedded in our government services, by having robots like our receptionist, this is the future — but yet we keep challenging ourselves. what is next? whether all this works or not, you can see dubai is dreaming big. this is a dynamic, modern city, built from the desert up. maybe its motto should be — if you don't try it, you don't succeed. that was kate in dubai, and that's it from us for this week. don't forget we live on twitter at bbc click, and we're also on facebook too. time we updated you on the weather prospects for the whole

of the british isles for the next few days or so. wednesday started in a pretty wild and woolly way across the north—western quarter of scotland. as ever, our weather watchers were there to capture the evidence for us, but things improved dramatically. come a little further south, not far really, troon beach and ayrshire. the difference, you had to get rid of this big old weather front which really made a difference. started dry enough across the eastern side it brought quite a bit of cloud and rain. thankfully that's moved away. thursday starts on a brighter note for many, a drier note, though not necessarily, because certainly across western spots, particularly the north—western quarter of the british isles, there will be showers. elsewhere, bright enough

and breezy sort day. quite a few isobars on that chart, and it makes a difference whether you are in the northern half of the british isles or the south, because further north, you are in the circulation of the big area of low pressure — there's quite a bit of wind, and it's got quite a bit of northerly in it, which makes it feel that much cooler. come a little bit further south, and a little ridge of high pressure is trying to calm things down. still breezy. there's a lot of isobars on that chart. the wind an ever—present right across the british isles. but i think the bulk of the activity found across the north, so if you are spending the day across southern parts, and here i'm showing you the real detail — it's almost like, if you need reading glasses, we've just put them

on to see exactly where those showers are, and you can see them peppering through western scotland and northern ireland. yes, we know there are words on that page, but we take those glasses off and we get the overall sense of what's going on. here are those temperatures. taking you out of thursday, pushing on towards friday, not a great deal changes, save perhaps a greater influence from this little ridge of high pressure coming across the southern half of the british isles, killing off what showers there may have been on thursday. less breeze, but there's just not enough influence from that ridge of high pressure to keep rain away from the western side of scotland, maybe later on into the fringes of northern ireland, but the temperature differential just beginning to ease up here — seven or eight in the north, ten or 11 in the south. the weekend? starts off none too badly. not wall—to—wall sunshine, but keep that little area of low pressure in mind, because it may on sunday give some parts a little bit of rain. otherwise, not a bad weekend. welcome to bbc news, broadcasting to viewers in north america and around the globe. our top stories: teachers and students are among at least 17 people shot dead

at a high school in florida. a 19—year—old former student who'd been expelled and was not allowed back on site is arrested. south africa's governing anc welcomes president zuma's resignation. he says he wants to prevent violence being perpetrated in his name. and we look back on the life and career of morgan tsvangirai, the veteran zimbabwean opposition leader and prime minister, who's died.