president trump has welcomed the historic summit between north and south korea, in which the countries leaders set out a peace plan and called off their conflict. but mr trump made it clear that the us will continue to put pressure on north korea until the regime gives after meeting donald trump at the white house, the german chancellor, angela merkel, said she would continue to be in very close contact with him while he considers his decision on the nuclear deal with iran. mrs merkel acknowledged flaws with the agreement but urged mr trump to stick with it. the swedish pop stars, abba, have recorded two new songs — their first since the 80s. the group said they were an unexpected consequence of their recent decision to put together a "virtual reality" tour. it's not yet known when the tracks will be released. now on bbc news, it's time for click. nowrseiic news,

it's lizgegfor clici queen. in , , nowrseiic news, it‘s'tgeeeffiiciqueea if —— , , , nowrseiic news, - , ,::,, -. - ; kitchen, on your blender. —— minor bitcoin. welcome to iceland, one of the strangest places i have ever been. it is icecold. and boiling hot. now, that does come with

advantages. the volcanic activity that formed the island millions of yea rs that formed the island millions of years ago means it has access to very cheap geothermal activity. and all that cold air? that can be used asa all that cold air? that can be used as a free cooling system. so cheap electricity and caldaire. in short, the perfect place to put a load of computers —— cold air. wow. every single one of these is a home computer. that is what it is. that isa computer. that is what it is. that is a desktop computer. and there are thousands of them. these computers are working flat out. without a

cooling system their processors would overheat in a matter of minutes. in the main area i would say be temperature is about 20 degrees or so. behind the ranks of computers it is much colder, probably about five. that is not because you have expensive air chillers. remember we are in a cold climate. all there arrarte holes in the external wall. it washes over the external wall. it washes over the computers and out through the giant fans the computers and out through the giantfans in the computers and out through the giant fans in the room. so what is it that these computers are doing that warrants all this noise, this heat, and this power? well, they are creating or mining cryptocurrency. yes, cryptocurrency, the new family of virtual currencies that its enthusiasts say it will replace pounds, euros, and dollars, and all the traditional currencies in the

coming years. that claim is, however, still a very live debate, with cryptocurrencies like bitcoin, ether, ripple fluctuating wildly in their exchange rates. the more mining computers you own, the more money you make. and that incentive has led to mass hoard of machines like this one popping up all around the world. mining is cheaper if you don't have to pay for the cooling, but it is cheaper still if you don't have to pay for the computers you use at all. a factor that has led criminal is to think of new ways to try to make a quick crypto but. here is dan simmons. —— bach. it's a crime that is fast becoming the hackers‘ favourite. it‘s a crime that is fast becoming the hackers‘ favourite. and the impact often goes on scene. this

house looks like your computer after it‘s been hijacked. everything may look fine from the outside, but inside resources have been ransacked. to add insult to injury, your electricity bill is about to go up, as you pay to power a machine thatis up, as you pay to power a machine that is now working hard for the criminals. a friend of mine got in touch with me on the sunday morning and saidi touch with me on the sunday morning and said i havejust been touch with me on the sunday morning and said i have just been to the information commissioner ‘s website where our data protection body of the government, and this is my anti virus protection has drawn up the screen, his visit is a government website, can it have a virus on it? 0riginally they were running a crypto minor. so your browser would be hijacked to run cryptocurrencies for the miners. what we found was that a third—party supplier that provides them with software had been breached and they had included the crypto minor in that. a third-party

app used by the ico and thousands of other websites had been compromised. the malware told the computers to start mining cryptocurrencies for the bad guys. you can see before my system is doing one or two different things and now the mine is running, it is taking 100% of my cpu on this device and using it to mind cryptocurrencies. you can configure a crypto minor in how much power it will use. if you agreed it will take 100%, then the computer or phone or ta blet 100%, then the computer or phone or tablet will slow down and you will notice that when you try to do things it is not responsive, it hangs. what they have done in this case if they configured it to use up to 60% of the power of the device. so it will use a lot of it. so the average user may never have known it was there and it was running. scott showed me how they could have stolen visitors‘ date. so why didn‘t they?

i have given myself the same level of access they did. the information commissioner ‘s website has a password field. if you go ahead and type something into that field, and already, if you look at the information being sent... 0h already, if you look at the information being sent... oh my god. it is coming up on there straightaway. that is sent in real—time to me. straightaway. that is sent in real-time to me. and the attackers in this instance could have done is? absolutely. they just chose in this instance could have done is? absolutely. theyjust chose not in this instance could have done is? absolutely. they just chose not to. why? easy money. attackers will take the low hanging fruit. the ico told is no personal data was compromised. third—party applications was that —— swiftly reviewed and patched. they also exploring new ways of protecting their systems. security firms are reporting hackers making millions of dollars. it is called cryptojacking. it is on the

rise. and the gangs that do it aren‘t only eyeing up this. tessel is one of the high your profile victims. read called all binta said their cloud server, provider amazon web services, had been uppermost. what we found out was the server was also exposing the other‘s secrets that make other secrets. they had access to test cars and other data. the criminals did not want secrets, they wanted resources. and now most things are connected to the net there could be some targets you have not thought of. this viewer‘s smart tv is not quite clever enough to stop they crypto minor who has put its processors into top gear. just look at the heat signature from the tv five stick that is not infected,

to one that is. the cyber criminals can get onto any other device in your household, for example, into a microwave or even into a smart blend if it is smart enough. itjust depends on the intentions of cyber criminals and how good their device is for mining. thankfully, at the moment, our connected kitchens don‘t quite have the processor power that they are looking for. i know what you‘re thinking. forget the criminals, is it worth us orchestrating our own devices to stop crypto mining to increase our own bank accounts or resitjust not worth the effort? —— or is it? while leaving your mobile can mine for cryptocurrencies, if you want to

make more than a few pennies you wa nt to make more than a few pennies you want to buy one of these miners with processors specifically designed for thejob. how do processors specifically designed for the job. how do the maths add up? processors specifically designed for thejob. how do the maths add up? we have one of the latest crypto miners. that is not the only cost in this business. we have too pay for the electricity to run it 21w. in a typical us city might cost us about $200 per month. so how fast can it mine cryptocurrency? well, that partly depends on how many people join in the game. the more total computing power doing this, the lower our return will be. recent estimates suggest about wine bitcoin per year. so, it estimates suggest about wine bitcoin peryear. so, it all estimates suggest about wine bitcoin per year. so, it all boils down to how much a crypto queen is worth. look at the bitcoin rate back in december and now in april that price has tumbled. and our costs are rising. some of the —— some reports suggest you would find it difficult

to make a profit inside of the year. unless, of course, you are using someone unless, of course, you are using someone else‘s kit. hello and welcome to week in tech. it was so weak that whatsapp raised its minimum age for users from 13 to 16 in the eu. facebook asked for permission to fly experimental drones over new mexico, and elon musk casually mentioned he is building a cyborg dragon, via twitter. it was also the week that samsung released six new tv shows filmed exclusively in virtual reality. they include robots, a comedy about two robots joining a futuristic new york police department. research has demonstrated a new way to reconstruct photographs using deep learning algorithms. this software predicts what damage photo should look like and fix corrupted pixels. robots are taking over more jobs

this week. apa the robot started a prestigious post at the smithsonian. and a robot helping patients rehabilitate raising to take two with cups king to life in israel. and finally, we heard evil artificial intelligence could start artificial intelligence could start a nuclear war by the year 20110, this is according to a report via the rand corporation think tank. it says advancesin rand corporation think tank. it says advances in a good chose the basic rules of nuclear deterrence and result in catastrophic mr galatians will stop it is with the right amount of global cooperation ai could actually make us safer. —— miscalculations. 0n the flipside, it says. as the parent of a five—year—old, i can tell you that i don‘t want to see my daughter luthi toa don‘t want to see my daughter luthi to a smartphone or obsessed with using a tablet, but at the same time, ourdo using a tablet, but at the same time, our do need to learn how to

engage with technology. so it is no surprise that a lot of devices that an to combine coding and creativity have become popular. today i am going to be testing some of the latest. but seeing as i am a little too old for school i have some helpers. is everybody ready? yes! here at tello primary school, these year 3 students seem to be engrossed in the experience. 0ver year 3 students seem to be engrossed in the experience. over here we have the power load pixel kit being tested. after some coding takes place, there are a lot of flashing lights. after connecting the our kids can get coding, creating light shows or games, even using the weather data or their own voices to trigger changes. the kids love the bright lights: starring carrie fisher and debbie reynolds, but i do wonder whether they would need to use it —— the kids love the bright lights: starring carrie fisher and debbie reynolds. when you are older you can become an

inventor. 0r anything that has coding. over here we have something thatis coding. over here we have something that is actually called an inventor kit. how exciting is that? what are you up to? we press this and then we pressed edit so we can change the picture. we can actually change the picture. we can actually change the picture and how it looks. this magnetic electronic building system challenges the kids to create reactions. a bus will go. there are advanced functions are allowing smart home interventions —— bars. the guides get updated so provide a variety of things to do. the set is also compatible with lego bricks. variety of things to do. the set is also compatible with lego bricksm is encouraging our brains to get a bit better. i have no idea what they are going to invent next but i will leave them to it. over here we have

a credible drone. how are you getting on? good. it will raise up and then it will turn and go through. then it will turn red. then it will rise again. then it is going to go clockwise. it is a good job you don‘t have them all that. it is quite complicated. you have set up a sequence quite complicated. you have set up a sequence of movements. 0nce quite complicated. you have set up a sequence of movements. once we get some space, we will go outside the classroom to do this. here we have a code dinosaur. the kids had a great time creating it. but it needed home wi—fi time creating it. but it needed home wi-fi to time creating it. but it needed home wi—fi to be tested properly. leaving them somewhat disappointed. 0nce billed as a coding panel to programme, it can tell stories, do jokes, do maths, and more. testing it at home, initially it was pretty intuitive, but much like a conversation with a lax or google home, it doesn‘t always grasp what

you are talking about. can you me meditates? i am you are talking about. can you me meditates? iam not you are talking about. can you me meditates? i am not sure i understand. become it is collect information to better the questions and answers in future, but this is totally anonymous. 0nce and answers in future, but this is totally anonymous. once it has been usefully used it will be deleted with only the statistical analysis living on. all of the bits of technology to enable children to work on those programme and coding skills and problem solving as well at the same time. ok, so some space. let‘s give it a go. i would! —— oh! that was lara and now we go back to the currency and the iceland where i have been getting the lowdown on the economics of running a giant crypto currency mining warehouse. well, we started this in 2013. wow!

yes, cheap power is important for crypto minors. but they are not a lwa ys crypto minors. but they are not always welcome. last month in northern new york, platts burke became the first us town to ban bitcoin mining. this isn't because we are luddites and we are afraid of crypto currency, it is because we reckon mostly have a fixed resource. platts burke has provided unusually discounted electricity, one fifth the price of other american towns, thanks to a fixed allocation of power from the niagara thanks to a fixed allocation of powerfrom the niagara hydropower plant. but the surge in usage from mines has meant prices skyrocketing, hiking up bills from residents. so, local government has imposed an 18 month moratorium, preventing new commercial crypto mines from setting

up commercial crypto mines from setting up shop. we were finding that bitcoin and crypto currency users we re bitcoin and crypto currency users were coming and demanding so much of our power that it was forcing us to have to buy very expensive power and it had a really detrimental effect on our ratepayers. they used such immense amount of power, one operator alone uses 10% of the entire quota. they expect other new yorketown is to follow suit. but crypto mining isn‘t just yorketown is to follow suit. but crypto mining isn‘tjust about the selfish pursuit of wealth. as much as “— selfish pursuit of wealth. as much as —— as mark has been finding out. the war in syria has raged for seven yea rs. the war in syria has raged for seven years. it is estimated that 470,000 people have died in the conflict. so the need is a huge, 80,000 kids require our attention and urgent

help, 5 million of them are still stuck in syria. the effect of the war on the civilian population has been devastating. there are besieged places, hard to reach places, so we are trying our best to reach the children are the most vulnerable. there is a agencies —— various aid agencies are trying to combat the crisis caused by the war. unicef estimates that syrian aid will cost $3.5 billion in 2018. with such vast sums of money required, fundraising effo rts sums of money required, fundraising efforts have gone into overdrive. the latest initiative plans to pay for aid using the crypto currency is cerium. unicef in front is responsible for this unusual form of fundraising. called game changers, the project is the brainchild of france‘s largest advertising agency, be etec. my mother used to say money

doesn‘t grow on trees but she was wrong because you can do money with nothing. it is just electricity and a new way to make money. the plan is deduced blockchain technology to mind crypto currency using game as computers. some of the most hard—core gaming computers belong to those who play games for a living. he sports competitors. professional gamers. ——esports. at their fundraising efforts are not taking place at flashy gaming events. it has been necessary to enlist the help of people who have just the right equipment which is why i have come to this quiet parisi and suburb because this house here is the unlikely location of the crypto currency mine. this is the training camp one of france‘s most successful professional gaming teams called

gamers origin. they play the game league of legends. our training is like five hours a day usually, sometimes we have days off but we need to place at least five hours and after that we have our free time. after installing a bit of mining software, these computers‘s powerful gpu or graphics processing units can begin mining the crypto currency. basically we can raise moneyjust by currency. basically we can raise money just by having currency. basically we can raise moneyjust by having our pcs on for the majority of the time. but it is when these gamers are not playing games have machines get to work mining which means their computers need to be switched on pretty much all of the time. so we just do it when we don‘t use the computer basically like when we eat and sleep and stuff, we don‘t use it, we make softwa re and stuff, we don‘t use it, we make software on and yeah, when the play, we just software on and yeah, when the play, wejust don‘t software on and yeah, when the play, we just don‘t use it. software on and yeah, when the play, we just don't use it. but some experts question the usage of these technology for fundraising purposes.

it is innovative in that it catches into the sort of bitcoin rise and bubble hype, where everyone is saying it coined, blockchain, crypto currency, and it gets attention to that and the course is excellent, because it should be thoroughly supported by the method of raising money isjust supported by the method of raising money is just really bad! like, firstly, mining crypto currency, this means using cryptic currency that uses the proof of work method which is literally wasting money to calculate the numbers and their three numbers at the system until they win some coins. its wasteful by design. it also brings out the video ca rd to design. it also brings out the video card to it produces a huge pile of the waste as well. i mean, it is a good cause, everyone should go to the site with their credit card and give them some money. research is unicef think they might have other uses for blockchain technology beyond fundraising. it is estimated 30% of aid to war zones doesn‘t

reach its intended destination, lost to corruption in the regions. can blockchain technology be used to help in terms of corruption because there is a lot of corruption around there is a lot of corruption around the distribution of aid in quite a few war—torn countries? the distribution of aid in quite a few war-torn countries? everything you do with the blockchain is public safety is really, really transparent. it is searchable some people don‘t carry cash on themselves in country where the security is sometimes difficult, imagine that the transaction would be like very clear, from the onset, you see very well who receives what at what moment which avoids the risk of duplicating the transfers which happens from time to time exeter exeter. the game changer project ended on march 31 and generated 84 etherium. unicef cashed the seine, raising 26,378 europe which will go towards providing aid for syria. it is clear to say this is just the beginning and a beta test of the

technology before they try using it for different age related purposes. —— aid. but is it from a rather noisy clique, as it turned out. hello. let‘s bring you right up to date with how the weather is going to pan out across the british isles for the weekend and the start of next week. this is the scene in western wales. this is pretty typical of what most of you had to endure. when you look at how the chart is shaping up for the start of saturday, the closer you are, generally speaking, to that area of low pressure, the cloudier your weekend is going to be. a lot of cloud around again. some sunshine across northern and western parts. we finish the weekend with an introduction from the south—east of some pretty wet and windy weather. so a chilly start to saturday across scotland and northern ireland. further south, a blanket of cloud helps to keep the temperatures up and delivers the prospect of a little bit of rain as we get through saturday morning. i‘m just going to take you into the south with our detailed model to take a look at how we see the showers developing.

you will see there‘s no great organisation about it. many will stay dry. pretty cloudy, as i say. the cloud thick enough through yorkshire and lincolnshire and some of the neighbouring counties. further north, into northern ireland and much of scotland, especially away from the eastern shores, there is a good chance of seeing one or two sharp showers. now we are into the bigger picture. the temperatures profile shows you it will not be very warm on saturday. if you are stepping out in the evening, those showers will tend to die away. that rain is hanging on through good parts across the eastern side until late on.

going to keep the cloud across the east. that will keep temperatures up. notice the blue, extensive across northern and western parts, especially in scotland, northern ireland and the north—west of england. a cold and bright start there. elsewhere, as i say, a lot of cloud. eventually, that will thicken up in the south—eastern quarter and before the day is over, we‘ll see rain and gathering wind, all of which will combine again to suppress the temperatures below what we would expect at this time of year. now, all of that wind and rain is coming from a big area of low pressure. it‘s not just the south—east that will see that combination of wet and windy weather — a good part of the near continent and northern parts of germany, getting up to denmark as well, and even at this range, there is a bit of concern about it because it will be pretty filthy, just for the start of the commute and the school day. disruption is likely. bbc local radio will keep you up to date. there you can see the extent of it. it could be cool enough for a little bit of sleetiness across the higher ground and the midlands. seven, eight, nine degrees or so. a bit drier and brighter further north. welcome to bbc news, broadcasting to viewers in north america on pbs

and around the globe. my name is nkem ifejika. our top stories: president trump welcomes the historic koreas summit, but he warned the us will maintain pressure on north korea until the peninsula is free of nuclear weapons. a former policeman accused of being the so—called golden state killer, and on the run since the 70s, makes his first appearance in a california court. more than 35,000 people a day are fleeing the economic crisis in venezuela, say charities who warn the numbers could reach levels seen in syria if nothing is done. and having the time of their lives — pop group abba record their first