this is bbc news, the headlines: the us president donald trump has declared a national emergency in an attempt to bypass congress and secure funding for his mexican border wall. democrat leaders have described it as "a gross abuse of power" and announced an immediate investigation into the declaration, which they say violates the constitution. relatives of shamima begum, the teenagerfrom london who went to syria, to join the islamic state group in 2015, have asked the government to help them bring her home. britain's home secretary, sajid javid, has made it clear he'll try to prevent the return of people who've supported terrorist organisations. five people have died after a gunman opened fire at an industrial warehouse in aurora, illinois, near chicago. police says the gunman has been shot dead. five officers were also wounded in the incident. the police say the gunman was 45—year—old gary martin. now on bbc news, click. this week: sign, listen, spray and

jump. 13 million text messages, 4 million youtube searches, hours of netflix videos — that is the kind of data floating around the internet in

every single minute of 2018. they are currently more than 2.5 exabyte of data created every day and every new message, photo, video and transaction has to be stored somewhere and that is why it data centres, crammed with hard drives and processes are starting to take a serious chunk out of the world ‘s electricity consumption. there is another problem with the way we store things in the long—term. i have a couple of my favourite songs and videos from the 80s stored on these. the problem is, i don't have anything to play them on any more. formats come and formats go. none of

the data can be usually stored u nless the data can be usually stored unless you have an enormous archive like the one at the bbc. so who is to say the current formats will be compatible with future technology. even usb sockets are vanishing from oui’ even usb sockets are vanishing from our laptops. but scientists believe there is one format which can solve both problems. consult data on a ridiculously tiny scout and we will a lwa ys ridiculously tiny scout and we will always have the ability to read it. i give you, our dna. it is a single molecule that stores all the information needed to make us. the theory is that its structure of two different based test could encode the zeros and ones that make up all the zeros and ones that make up all the data that we want to store. but

can it be done and what are the possibilities? ben simmons has been finding out. —— dan. it is pretty far out there but it sets the music and what they are about. in his birmingham studio this artist is painting a unique work thatis artist is painting a unique work that is much, much more than meets the eye. it is mind blowing when you think about how much data is out there. it is the album cover of the hugely popular album by massive attack. the band agreed to have this music encoded in dna to celebrate its 20th anniversary. and then added to several spray paint cans. it

means the painting will hold thousands of copies of the album and to find out how i have come here to a lab in isjuric to meet one of the pioneers of using genetic codes to store data. —— zoo —— zurich. pioneers of using genetic codes to store data. -- zoo -- zurich. in here and enormous box. this doctor has and coding the music or ready to be sequenced into the dna. that work is done by several companies now offering genetic code to order. they make the dna in the sequence that encodes for the album. they will encode. then you have to make... you have to make a lot of those sequences. what does it look like

when you buy it? itjust looks like water. but we know there is dna in there and every tube there is about a megabyte of information. the whole album is distributed over the tubes so there is no particular order. every tube contains a million different sequences and every sequence has a number stored in it to tell us where it sits in the overall picture of the album. we have correction implemented into it. if we miss the sequence in reading 01’ if we miss the sequence in reading or writing, the data is stored somewhere else. you have some redundancy. inside this chip is effectively about the equivalent of one of the tracks of the album. and

how much does this cost? cd megabytes, $1000 per megabytes so 15,000 to store other help them —— the album. it is a lot but you only have to storage once and then you can make copies of it. one advantage of dna over all storage technologies that we have that nearly full free it can make millions of copies. the enzyme we have in our body that does copies and we feed this chip to it and it makes enormous amount of copies. it degrades in about a year, not really useful, their water. so we had to find a solution to that. that, and opaque section at the end

of the tube. in there, iraq small glass particles and in them we have encapsulate in the dna. we have directed glass to grow around the dna to make that white powder. because you have grown glass to cover the dna... that is exactly what we do and it takes the dna. very similarfrom what we do and it takes the dna. very similar from amber. it is protecting it from decaying for millions of years. exactly. our dna in the glass, for probably a thousand years it protects it from decaying. as long as you can read the dna. exactly, that is an other advantage. because all storage is the innate say we will always be able or ofan

the innate say we will always be able or of an interest in reading oui’ able or of an interest in reading our dna. this is the plate, if you like, the powder is put on and then that goes into the microscope and when we zoom in about 100,000 times, we could see each one of these sort of balls is a particle containing a thousand strands of dna. we can zoom out and see what is on the plate because each one of these specs, these white specks, is a particle with a thousand strands of dna. how many copies are inside here? we put a million copies inside. so the picture painted much more than a thousand words. it is not only the first album cover outward to include the album, a painting the size could stop enough data to hold every

album, picture, photo, book and a recording, audio and film ever created in the history of mankind. so how can we read the information? that is one fly in the amber at the moment. this machine takes 17 hours to do it. it has come down from about a week but still, imagine pressing play and then waiting that long. so we may be several years away from dna being practicalfor storage but at least it will hang around for thousands of years and, ina around for thousands of years and, in a format we will always recognise when we see it. or here it. hello and welcome to the week in tech. instagram confirmed a glitch was causing some user accounts to

change dramatically. russia considered really unplugging itself from the internet to test it cyber defences. and placed last in a report finding apple self drivers. the top performer only disengaged once every 11,000 miles. dji said it will expand fencing capability. the changes come after major disruptions and gatwick airport in december. it was closed after drones were spotted flying nearby. addictive technology enquiry launched. it will hear evidence on the effect of social media and virtual reality and excessive smart phone users will have on children and society. arsenal, liverpool and man city

looking at creating a three d experience of the fans. finally, in an idea so crazy that itjust might work, ford is using lane assist technology the cast to keep couples happy ina technology the cast to keep couples happy in a bed. it moves at your partner back into position if they encroach into your territory. it mimics be alert you experience when drifting outside a carlen. —— car lane. a few weeks ago we visited the amazon sea. we met the people behind it is voiced recognition tool. as the tac gets better, it could one day become the way we interact with oui’ day become the way we interact with our devices. —— technology. that is a really good point and

apple home port gives some control to the use of a touchpad but they —— nowhere near enough. the captions feature is available on versions of alexa with a screen. all of this is quite basic. this man has created a simple algorithm to do this... the camera sees what he signs and turns

it into text. it only does a few words but the point is to inspire the big companies into action. last month, google released a couple of new accessibility apps. and we have been putting them to the test. new accessibility apps. and we have been putting them to the testlj lost my hearing when i was seven and a year after that i got an implant which has helped me a lot but even now in certain situations i find it really ha rd to now in certain situations i find it really hard to hear. in noisy cafes, a dinner party, my hearing is not the best. we have deliberately come toa the best. we have deliberately come to a coffee shop with a real everyday noise all around us to demonstrate this. we are going to start off with google live transcribe. and it does what it says insta ntly a nd transcribe. and it does what it says

instantly and simply creating a script of your conversation. it can do so in 70 languages and dialects. quite impressive accuracy. it seems to do really, really well with people talking. with one or two people talking. with one or two people talking. with one or two people talking. the further away you get the worse it gets and the closer it gets the more accurate. the underlying technology is automatic speech recognition and what that is isa speech recognition and what that is is a way of us taking all sorts of known speech from recordings and basically training algorithms on top of it so that it learns all the nuances and the contexts that we understand as people. it is not bent to be perfect, no machine is ever going to be as good as people at doing this. unique vernacular, slang, accidents, it may struggle

with that. we also have here google sound out the fire out. you need to attach a pairof the fire out. you need to attach a pair of headphones to the device and from there it can turn up the volume on different elements of what you are listening to. it may be the quite a background noise you want to make louder, while keeping the main sound you are listening to at the time, which could be some music, at the same volume. now, how useful did you find this was, maddie?” the same volume. now, how useful did you find this was, maddie? i thought it was quite cool that you could play music and still hear stuff from the outside world at the same time. the phone's microphone picks up the ambient sound and, from there, the sheen learning and artificial intelligence isolate the elements. —— machine learning. that could make it possible to make speech louder and the sound of an air conditioning unit quieter. people with worth hearing, it would be much more useful. it just boosts hearing, it would be much more useful. itjust boosts that noise around you. when you are less co mforta ble around you. when you are less comfortable with your hearing it gives you that little bit of

security that you could have that little bit of extra volume. it could bea little bit of extra volume. it could be a good half—an—hourjust focusing on the hour, playing with all the toggles, it builds into the settings on your phone, so it took me a while to find the right settings for me. these are what i would call accessibility first applications, in that we are not taking an existing product and making it more accessible, we are making, in both cases, the real world more accessible using these technologies that exist on a smartphone and in the cloud to date. of course, there are other apps developed for the deaf and hard of hearing, too. a bit ready for seven was released in 2016. it's a voice recognition appelgren conversations, say around the dinner table. everyone downloads, speaks into their phone, has the words transcribed and nametags. compared to the lie transcriber at it is not as fast.

you would need in front of your face as well. but it does correct itself as well. but it does correct itself a loss in the time. the big game changer was the first hearing aids with the ability to communicate with and iphone came out. that opened up and iphone came out. that opened up a lot of possibilities. you have the processing power of the smart phone. apple added similar functionality to the airports last year, with live listen allowing you to place your phone or ipad near the sound you wa nt phone or ipad near the sound you want amplified. and now starkey, one of the lead hearing a brantz, will be adding for these and a virtual assistant to their device that already features live translation and actively tracking. they live translation feature is promised, along with activity tracking and an app to host a whole lot of data. it looks at your constant communication with other people and is missing how much social interaction you are having. there are sensitive that the

hearing aid, motion sensors inside the hearing aid looking at how much motion you have got. there has been found to have a relationship between cognitive decline and hearing health. but when it comes to google's latest releases, even if they are not proving quite perfect yet, they do harness the power of the fiercest weapon most of us have on us the fiercest weapon most of us have on us all the time. now, we are in the countdown to the 0scars at the moment and what better way to stop ourselves from going crazy with anticipation than to continue our series looking at the nominees in the best visual effects category. not you, this year, i'm afraid. you are after something. this time it is our favourite scruffy looking in further. in solo is star wars story. i'm a driver and iama is star wars story. i'm a driver and i am a flyer. i've waited a long

time for a shot like this. what do you think? well, what you know? we a lwa ys you think? well, what you know? we always try the star wars to do things for real wherever possible. we can't build flying x wings or tie fighters. and the same way you can't make real droids you can make great costu mes make real droids you can make great costu m es for make real droids you can make great costumes for people. so in the case of solo, l3 was a practical costume. a part of that was phoebe wearing a green body stocking inside and then the outside, the working parts were replaced with cg. that is the ultimate goal, to try to always retain an element of reality, do something practically, but then use cg to fill in the bits that you can't do for real. even before the principal photography had started we

we re principal photography had started we were already doing previews for the train sequence, which is where you can lock the animation sequence up ina can lock the animation sequence up in a computer and work out what all the shots are going to be. that then informed a helicopter and ground—based shoot out in the dollarmites in italy. was shot summit like 80,000 images. all those images were effectively thrown into a piece of software, the software works out the positions of all those images, where the cameras were, and then builds what is called a point cloud from those images which gave us cloud from those images which gave us effectively a 3—d representation of the entire mountain range. from that we process that into a red bull geometry mesh and then projected all of the images on to that and that allowed us to recreate this mountain range in 3—d what we wanted to be able to do was take shots we had shot using the helicopter and cameras and then effectively move the camera much closer to the mountain face. the 3—d mountain range came into play. it also gave

us range came into play. it also gave us the ability to cook a shot from scratch in postproduction, change the cameras, changed the design on the cameras, changed the design on the shots, giving us the freedom to do whatever we wanted to do in postproduction and react to notes and comments from the director. part of the problem with explosions and things like that is if you shoot a miniature explosion, the scale of the gravity gives itself away. we are trying to do an explosion that is the size of a mountain. rob had the idea that we can't go big, how about we do absolutely tiny? he was about we do absolutely tiny? he was a big fan of the slope no guys on youtube, you have seen is that smashing things up, shooting it with the altar slow motion cameras. they did a thing where they were doing underwater explosions, firing off tiny little firecrackers in fish ta nks tiny little firecrackers in fish tanks and shooting that something like 130 frames per second. so we decided to have a go at doing something like that. and, alderley, thatis something like that. and, alderley, that is what we did. we set up a large fish tank and we took a 3—d

print of the mountain that we were going to blow up, we shot it at 130,000 frames a second, and we filmed multiple versions of setting offa filmed multiple versions of setting off a firecracker charges, various different colours of firecrackers, various different densities. we shot the miklik 6a various different densities. we shot the miklik 64 different versions of this exposure. using the 3—d print of the mountain the explosion bubble wrapped itself the —— around the mountain vertically. it is quite funny, when you look at the shot, most people would think that the mountain range is real and the explosion is cg but it is actually com pletely explosion is cg but it is actually completely the other way around. the explosion elements are absolutely real and the mountains are all cg. you know, it is no secret there was a change in directors up went through the shoot of the movie and ron howard came on board. he is a fabulous director and he tried to have as little lamb ——an impact on the production as possible. he wa nted the production as possible. he wanted to pick up the reins and run with it. and he did a greatjob with that. there were certain amounts of the movie that he wanted to re—

sculpt in his own vision. so that meant that the shoot extended. the sheet extended by about two months. but the release date didn't change, so that meant our host production schedule was somewhat compressed. and it made things, you know, a little bit of a scramble in the final stages will stop but, having said that, it was, and it is a testimony to all the team at ilm and production and the way they organise the schedule, we still managed it. here in london, i think we managed ita here in london, i think we managed it a couple of days early. here in london, i think we managed it a couple of days earlylj here in london, i think we managed it a couple of days early. i have a really good feeling about this. since when do you know how to fly? 190 years old?! you look great! pushed it! wow. i just love looking pushed it! wow. ijust love looking at the work that goes into making those movies. don't forget, next week is 0scars weekend and we will be running the

final in our series of best visual effects nominees. that's it for this week. thank you very much for watching. we are all the social media, include on facebook, youtube, instagram, and twitter @bbcclick. see you soon. hello. judging by the weather over the past few days it looks like spring is in a hurry to start. and, well, apart from the cloud that moved into northern ireland and western scotland, friday brought plenty of sunshine again and the warm spot was in wales. this view from wrexham. it was in rhyll, actually, in north wales, where the temperature reached 17.5dc. that's even higher than thursday's top temperature. and over the weekend

we are we are still in this lower, mild air heading in from the south. though there are a few weather systems coming our way. so we can't rely on clear blue skies. here's the first week one that's moving across northern scotland, with some outbreaks of rain. another one will come in during sunday. so, for the weekend then, it is still mild. temperatures are above average for the time of year. it will be breezy, especially on sunday. it will be dry for many. though these weather systems will bring a bit of rain, especially to western parts of the uk. and, already, as saturday begins, things are different. not as cold as recent mornings. more cloud around as well. still the leftovers of some overnight rain affecting parts of western and northern scotland before that eases. we're going to keep a lot of the cloud feeding into southern england. that's going to edge further north. elsewhere it's sunny spells, rather than clear blue skies on another breezy day. so a closer look at things at four o'clock in the afternoon. should start to see some sunshine coming back —— should start to see some sunshine coming back into the channel islands.

could be some coast and hill fog from the thicker clouds in the south, maybe the odd bit of drizzle. cloud increasing for wales, the midlands, into east anglia. but still sunny spells in northern england and a few breaks in the cloud for northern ireland and scotland. best of the sunshine here will be in the east. but cloud thickening in the western isles, again, the northern isles still seeing a bit of patchy rain. could see the odd shower pushing in towards cumbria, lancashire, too. but most places are looking dry. 0vernight we are going to get rid of quite a bit of the cloud, so clearing skies for many of us. though temperatures aren't going down too far into sunday morning. so no issues with frost. then the next weather system i pointed out is starting to bring its wet weather into the west. it's going to weaken as it slides further east during the day. so we're not going to see too much in the way of wet weather out of this. it is a windier day with this weather system, though, approaching and moving through during sunday. but there is more sunshine around ahead of this system. and it's a fairly narrow one as well. just cloud, a bit of patchy rain working through. clearing through northern ireland. any heavier bursts of the rain, really, into northern parts of scotland for a time.

quite windy in western scotland. some gusts up to 50 mph or so. and notice temperatures are just on the up a little bit more compared to saturday. especially, of course, where you get to see some sunshine. welcome to bbc news, broadcasting to viewers in north america and around the globe. i'm reged ahmad. our top stories: donald trump invokes national emergency powers to fund the border wall with mexico. the democrats are furious. we are going to confront the national security crisis on our southern border, and we are going to do it one way or the other, we have to do it. five people are killed in a workplace shooting near chicago. police say the gunman has been shot dead. framily of the pregnant teenager who joined the islamic state group ask the british authorities to help bring her home, even if she faces prosecution. and, she shone a light on the black british experience. the author andrea levy dies at the age of 62. my