president trump has been admitted to the walter reed military hospital in washington to undergo medical tests, as a precautionary measure after having contracted coronavirus. earlier, the president's doctor released a statement saying mr trump was "fatigued but in good spirits" and he was expected to continue to work. president trump has been receiving an experimental drug to treat his coronavirus infection. it is a synthetic "antibody cocktail" which has not yet been tested on a large scale. early results from a small trial showed a decline in virus levels after patients had been given a high dose of the drug. mr trump's democratic challenger, joe biden, has twice tested negative for the virus following tuesday's debate. he's continued his campaign with a speech in michigan. he announced he would temporarily withdraw negative adverts regarding president trump due to his health. now on bbc news, click.

this week: water show we've got to you. we are on the water, under the water... and... there has been a spillage. hey, welcome to click, hope you are doing 0k. lara is here, how are doing 0k. lara is here, how are you doing, mate?” are doing 0k. lara is here, how are you doing, mate? i am good thanks, this week i started talking to friends about how winter was likely to be. what we had back to doing zoom get—togethers? we had back to doing zoom get-togethers? what you think? there was a novelty for a

couple of months of meeting friends and video chat but then i got fed up with them. even a antisocial geek like me realise that things are better in the flesh. so true. but the idea of heading back to video calls doesn't seem to have been missed by fashion designers. all you need to do is take a look at some of what was on show at milliron and london fashion weeks, and it seems to be at theme, of big colours and logos around other necklines —— milan. for a while it has not seem so milan. for a while it has not seem so important how we dress oui’ seem so important how we dress our bottom halves. i don't know what you are talking about. but listen, this week, i have actually been out and about meeting real people! and wearing proper trousers. these people are going to do something incredible. they are trying to make the fastest sailing boat that they can, to compete in one of the toughest ocean compete in one of the toughest ocea n ra ces compete in one of the toughest ocean races that barriers. and for one day only, they let me in to see how they are doing it. -- that in to see how they are doing it. —— that there is. the america's cup is like the

formula i of boats. fast, ultracompetitive, with all of the power coming from the wind. and the boats don't so much sale, as fly. relatively small foils underneath the vessels act like wings that help to lift the entire whole out of the water and massively reduced drag. —— hull. the water and massively reduced drag. -- hull. i learned to sail god, 35 years ago or something. i take myself back to that eight—year—old kid thinking about the boats we are sailing now, doing over 50 not, 65 miles an hour. ijust think thatis 65 miles an hour. ijust think that is absolutely nuts. here in portsmouth, sir ben ainslie's team is designing one of the boats that will race next march. the america's cup has a weird rule, and that is that whoever wins the event gets to decide all of the rules

for the next one. i am notjust talking about the location and the date or even how many heats there are, they get to dictate there are, they get to dictate the type of boat that is used in the number of sailors you can have on board. so basically, every america's cup requires teams to design a new boat from scratch. in this case, the previous winners, 0 ra cle case, the previous winners, 0racle new zealand, have chosen, guess where, new as the location. they have switched from two hull catamaran to a single hull boat and made a host of other rule changes. one of the big changes in this cup with regard to the rules is we can't do any testing in the winter or the tow tank. all the testing has been done in computational dynamics on machines. max is part of the tea m machines. max is part of the team who tested many, many virtual boat designs repeatedly building and rebuilding them in softwa re building and rebuilding them in software to try and improve the performance in the water and in

the air. so ineos team uk have a big problem to solve which is simulating their conditions and the hydrodynamic conditions on the hydrodynamic conditions on the yacht as it sailed through the yacht as it sailed through the water. an insane number of different scenarios. to simulate what happens when water strikes the hull of a yacht or when air hits the sale ofa yacht or when air hits the sale of a yacht, we pixelate those services. we put little square pixels all over that. , services. we put little square pixels all overthat. , on services. we put little square pixels all over that. , on each of those we do a bit of maths, we understand the temperature pressure and forces reacting there, then we estimate what will happen next and then how that cascades down the line to the next pixel and the next pixel. then we have an idea of what the boat will look like when it is in the water in race conditions. and the more detailed your simulation is, the more pixels you can break your boating into, the more accurate your model becomes. but every single pixel is simulated by a different computer processor, which means

you need a massive amount of computing. basically, you need to harness the power, not of the wind, but of the cloud. now the wind, but of the cloud. now the crew do get to test how the virtual designs handle. this simulator knows exactly how the current design will behave when under the control of a master sailor. so let's see how it goes with me. now i am sailing! wow, one of the foils has gone into the water... now if you go ha rd into the water... now if you go hard right and down... a little bit slow attacking the front of the foils. books, we seem to have some. i am going to guess, though, that is user error and not a problem with the boats. —— 0ops. it is not all about design of course. the sailor at the of their game. all of them need to be in peak physical form, and that is the job of

head of human performance ben williams, who also uses data. this time captured by garmin watchers to monitor the fitness regime and find the best mix of training and rest. what i am interested in is how much training they have done, how their bodies adapted to the training and how much recovery they need to harvest that training stimulus. people think you get fed from training, you don't, you get fit from recovering from training. 0nce you put stress on the body your body will adapt to be able to recover from that stress. you may be wondering, how fit do you need to be to be a sailor? well... here is something i didn't know about sailing. it used to be the case that if you wa nted used to be the case that if you wanted to move the sale or an appendage on a boat, you would turn the winch as and when you needed to. but modern boats are so needed to. but modern boats are so powerful that the only way you can move something like the sale is using hydraulics

batteries. but here's the thing— the only way you are allowed to recharge the battery is by doing that. it's called grinding. an eight sailors who are built likea grinding. an eight sailors who are built like a brick ship houses will do this for the whole of each race to keep those batteries charged. yes, of course i'm going to have a 90, of course i'm going to have a go, and of course it is going to go well... so we will be doing this for the duration of the race, hopefully a few more watts than that. right. do you wa nt to watts than that. right. do you want to turn that on then? so we will be... argh! how can you do this! at all, ever? what is fascinating with the sport is that it is not like formula i. here, every

boat can be really different, it isa boat can be really different, it is a massive unknown and there is no tried and tested formula for success. how quickly do you think you will be able to tell whether you have got it right or whether someone have got it right or whether someone else has got the better boat? we will know within the first five minutes. we have got a race in december, a christmas race which is kind of the warm—up to the series itself, and pretty quickly and that we will know whether we got it right or wrong. hello and welcome to the week in tech. this week, nokia struck a deal to become the largest equipment provided to bt, following the government's decision to block highway from the uk's five d networks. amazon confirmed it would be joining google and microsoft and nvidia in a cloud gaming market with a new streaming

service called luna. and it is an end of the era for the original incarnation of farmville after facebook announced it would be closing in december. the uk's first d riverless in december. the uk's first driverless car lab has been lost by telecoms company 02. backed by the government and the uk space agency lab will pilot driverless cars that use 5g and satellite technology. amazon has announced a new —— new payment service that uses a customer's hand to authorise payments. the scanner registers an image of the user's palm and is being trialled at two stores in seattle. and if a device on your head for vr isn't enough, how about robot boots? these new creations are what they call the world's first robotic vr movement solution. they allow the wearer to walk through the virtual space without actually moving. virtual insanity? you decide.

around this time of year the big tech companies do their annual hardware showcase when they show off everything that will be going on sale just they show off everything that will be going on salejust in time for christmas. last week it was amazon, they have turned their echo speaker into a sphere, and they have a flying home security camera, nothing crazy about that. this week as google's ten with an online event, of course, so let's see what they announced. first up is google tv. it looks a lot like apple tv and amazon via tv, bringing recommendations and gives you a lot to choose from. and there is a new chromecast which has a voice remote control, just like the apple tv and amazon fire tv. we knew this was coming because it went on sale early in some american retail stores. we are moving on to smart speakers, the newest one is that nest audio which is designed for people who like to listen to music on their smart speakers. and to make it sound good they have embedded a high—frequency

tweeter — not donald trump. (laughs). moving on to the phones, and it is ourfirst look at the new pixel phones. just a few months ago they brought out the pixel 4a, a cheaper version of the pixel four and they have updated it now with the pixel 4a 5g. and here is the pixel five, which has wireless charging and reverse while studying so you can charge your headphones in the back of the phone. it is interesting because they have actually got —— got rid of a lot of the flagship features like facial lock, and the soli radar has gone, which was supposed to let you control the phone without touching it. that is all gone. they will sell the pixel five at a lower cost which is going to be quite important given the global situation we are in. in terms of new software features it will now take those blurry background portrait shots,

while in nightsight low light conditions, you can artificially eliminate portraits with an artificial light by dragging your finger around in portrait mode, that is very cool. and that's it. i tell you what, these events go by much quicker when they are just pre—recorded and you are not watching presenters fumble through things on stage. that might have been the most low— key might have been the most low—key launch for a flagship phone i've ever watched, but i have to admit the pixel cameras are usually really good, every year google brings new innovations to the pixel camera, i can't wait to try those new features. now, as entertainment venues have been struggling to reopen safely, one company hopes to bring an experience to your kitchen table via a smartphone. this is an audio only experience, and the idea is that you close your eyes and listen to the strange things that start happening around you. and they really do sound like they are happening

in 3d space because they have been recorded using binaural sound. this is something we have heard before in the programme, and it is incredible. so with no idea what to expect, spencer and i put it to the test. and if you wa nt put it to the test. and if you want a taster of the experience from home, you're going to need some headphones too. radio feedback. is everybody here? yes. now get yourself a glass and fill it with water. we are all ina and fill it with water. we are all in a different rooms. many couples in the same configuration, sitting at a table across from each other. now close your eyes. close your eyes and keep them closed. if you open your eyes before the session is complete you might experience a mismatch of the thin membrane that separates

this world from the other world next door. with your eyes closed, try to envisage the person sitting off opposite you. don't look. don't check if they are close. ok, this performance is aimed at couples but ignoring that minor issue, it is all about placing yourself in the story. double is the latest show from dark field radio. its recent sound only productions took place in pitch black shipping containers. now though it is possible via an apple and a pairof possible via an apple and a pair of headphones. so when we we re pair of headphones. so when we were working with creating this experience at home we still wanted to feel like a live experience. so one of the elements of that is a time show, something that happens at a certain time, so there is some feeling of community about it, you know, people are sat in their different homes and there isa their different homes and there is a lot more interest in it am

now at the moment because vr and of this increasing interest in immersive experiences that placing at the centre of a narrative. i'm kind of on edge because... i'm waiting for something. something that will make usjump. you have known each other for however many years sitting on the side of the table. 0ne years sitting on the side of the table. one has been replaced by a demon whose intentions are unclear. and unlikely to be unintelligible and the other is planning a murder. planning a murder? is that you? i don't know. one of us that you? i don't know. one of us has turned into a demon and the other is planning a murder. it sounds dodgy. what is that? i've no idea. much like the biannual sound recordings we have heard on the show before it is recorded using a binaural sound head shaped like a human in both ears microphones. you treat this had as if it were the audience members, listening

to the performance. so everything that the head here's will be from the perspective of the future audience member listening via headphones and one of the things that binaural recordings do better than any real—time audio specialisation is proximity so we are also developing some other tech elements to include live microphones with the order of the microphone specialised, speech recognition and a few other things that will allow us to increase this interactivity. wait for the right moment to come. because opposite me, the demon has its eyes closed. and so, i stabbed it. and now that the demonic copy is... oh god!

come back. this is pretty freaky! whispering in my ear! no! i don't like it! thank you. you can remove no! i don't like it! thank you. you can remove your no! i don't like it! thank you. you can remove your headphones. thank you. oh! goodness, but was quite bizarre! i am, that was quite bizarre! i am, that was a bit of fun! conceptually i thought it was brilliant but i wasn't sure about the storyline because i didn't actually want to murder you. and even though it sounded good i think we probably would have both benefited from over your headphones. true. what is interesting though is because they asked the two people to face each other, they really can make things some of our coming from a specific place in the room because they can send one person a sound in their right earand one person a sound in their right ear and then the other person a different feed where the sound is in the left ear so you can both agree that the sound happened over there.

really interesting concept, i have to say. now onto the great barrier reef, wonder of the world. the largest living structure on the planet. at over moo miles long it is so big that you can see it from space. but as you probably know, it is under threat, rising water temperatures and a changing environment because the coral to go white, to bleach. and the reef has just undergone its third mass bleaching event in the past five years. this time, for the first time, white stressed coral has stretched from one end all the way to the other. while cyclones and climate change pose huge threats to the reef, there are other factors too. so nick has been finding out the great barriers to the reef survival. sugar, a billion—dollar business to

australia. almost all of its cane is green here in queensland. if the great barrier reef right on its doorstep. when it comes to conserving the reef a lot of work is being done out at sea but there is also stuff happening right here at sugarcane farms happening right here at sugarcane farms like these which i dotted all around the tropical coast. it is the run—off from the sugarcane farms, the pesticides, herbicides, that are proving to bea herbicides, that are proving to be a huge threat to the future health of the great barrier reef. chris and belinda have developed smart water sensors that remotely measure nitrate levels in farm lagoons. nitrate can lead to more algae build—up and this coral diversity out on the reef. that is where the light shines through and that is where you get your reading from. their system including a bunch of sensors and a computer ina bunch of sensors and a computer in a waterproof box help them remotely secure more accurate readings around the clock. and crucially, gauge the effects of specific rain events. we might not have a lot of nitrogen leaving every paddock on every farm but all that really needs

isa farm but all that really needs is a little bit over a large area of land. those marine systems, they have not evolved with high nitrogen levels so once that changes a little bit, you change the balance. enable screen. you change the balance. enable screen. one solution could be this, herbicides spraying fire drone that zones in from above and targets hard to reach weeds, thus greatly reducing the amount of chemical spread across the field. often here especially in the wet tropics you cannot get back onto the paddock so it is too wet to be able to get onto all as we have with sugarcane it becomes too large so the only way to get any product back onto it is to do it with an aircraft of some kind. the dgi drone has four radar sensors on board so it can get close enough to cross without crashing and the nozzles have been specifically designed to form just the right amount of liquid so please don't blow off into the wind. airborne contraptions are helping the reef in other ways. there are three little bumps

just there was to mark yeah. that means this is live coral so that means this is live coral so you that means this is live coral so you can that means this is live coral so you can inferjust from the shape of the wave? yes. doctor karen shape of the wave? yes. doctor kare n joyce shape of the wave? yes. doctor karen joyce uses shape of the wave? yes. doctor karenjoyce uses drones equipped with sensors like spectrometers to capture detailed information unseen by the human eye. it measures the way light is reflected or absorbed so for example we see trees as green because they reflect green light. different things on the reef reflect light differently as well. it helps us to understand the types of things we have on the reef but also how healthy they are. you realise how small an area the drone can capture. so that would be like 15 minutes work to dojust that would be like 15 minutes work to do just that little bit there. and this only represents one of 3000 of the reefs of the great barrier reef. to better understand the scale and complex ecosystem of the reef, i have come to the epicentre of tropical marine research, the

australian institute for marine science. behold! 0ne australian institute for marine science. behold! one of the most advanced reef replicators on the planet. 33 tanks, more than 140 pumps and over 42 kilometres of piping. all controlled with custom tech. and of course ijust had to have a nosy behind the scenes. the bits and pieces you see along the back wall here i want to control our ph and pro— could provide dynamic control of the processes occurring in the tank and it means we get much, much better control and tighter control of our seawater so tighter control of our seawater so the conditions are more like what we actually see on the reef. i have got taps, tubes, a orange snake! this enables us to control the temperature within plus or —0.1 of a degree. we can create profiles daily or seasonal and control salinity so replicating freshwater plumes. we can

replicate contaminants where they have been nutrients or pesticides and insecticides and a whole range of different parameters. it is able to precisely replicate the conditions of the great barrier reef. as it is found in nature. but this is also able to look into the future. what will the reef look like in 50 or 100 yea rs reef look like in 50 or 100 years from now? we're at those mechanisms that make coral more thermally resilient. this is not a solution. the solution is dealing with climate change and the carbonisation of the economy. we're just looking at ways of assisting this to enable those coral to survive until we find a solution to bigger issue. scientific facilities. drones. monitoring sensors. these are just some of the many efforts to importantly buy time for the reef. while seismic shift are required to truly preserve this natural phenomenon, small actions can lead to big change. fascinating stuff! that was nick in

australia and that is it from us for this week. as ever, you can keep up with the team on social media throughout the week on youtube, instagram, facebook and twitter. thanks for watching and we will see you soon. for watching and we will see you soon. goodbye. hello there. scotland, northern ireland didn't fare too badly on friday with some good spells of sunshine around, some pleasant sunset scenes as well. but for england and wales, it really was pretty atrocious. wet and windy — all courtesy of storm alex — and it looks like all areas willjoin in with the heavy rain this weekend, including scotland and northern ireland. could cause some transport disruption, some flooding in places, and the winds will be quite a feature too. so for saturday, it looks thoroughly wet to start the day across much of england and wales, eastern scotland, that rain also drifting

a little bit further westwards at times. but meanwhile, it will be clearing a little bit from the south—east, so here, we could see some brightness into the afternoon, but it stays windy. south wales into south—west england, those temperatures pretty disappointing — the low teens for most of us, could see 16 in the south—east. but it's the rainfall amounts we are most concerned about this weekend. saturday into sunday morning, amber warnings issued for parts of wales, the south—west of england and also for the east and north—east of scotland. areas here, certainly over the high ground, could see in excess of two inches of rain, so flooding is likely to be an issue here. as we move through saturday night then, that rain really piles its way westwards, affecting northern ireland as well. winds will be quite strong across the south—west. temperatures a little bit lower than what we had for the previous night, typically around 9—10 degrees. now, this new area of low pressure will be sitting right across the uk as we head on into part two of the weekend. it will be sending bands of cloud and rain around the country, mainly

around its periphery, where we will also see the strongest of the winds — gale force winds at times here — but in the centre of it, winds not quite as strong. we should see some sunshine and that will set off a few heavy, maybe thundery showers. and again, those temperatures pretty disappointing — in the low teens for most. as we move out of sunday into monday, our area of low pressure begins to fill somewhat, begins to weaken a little bit, but it is still going to be enough to generate showers or longer spells of rain, certainly around the edges. fairly strong winds, too. those winds will continue to ease down. central areas will see the lightest of winds with some sunny spells through monday afternoon, but that could set off some heavy, maybe thundershowers again. —— off some heavy, maybe thundery showers again. temperatures again low teens for most, but we could make 15 or 16 in the south—east, given some sunshine and light winds. but it remains unsettled as we have through the new week, certainly for england and wales, with a high chance of heavy showers and sunny spells.

you. don't look. don't check if they are close.

welcome to bbc news — i'm james reynolds. our top stories: president donald trump has been taken to hospital for treatment after being diagnosed with coronavirus. he left the white house unaided, wearing a mask. on twitter he said he was "doing well". i am going to walter reed hospital, i think i am doing very well, but we are going to make sure that things work out, the first lady is doing very well. so thank you very much, i appreciate it, i will never forget it, thank you. he's already been treated with an "antibody cocktail" and vitamins. but in good spirits." we'll look at the possible health risks the president is facing.