this is bbc news. the headlines: the american pro—gun lobby group the national rifle association has filed a federal lawsuit over gun control legislation that had just been signed into law in florida. the nra says the law, which raises the legal age to buy guns, violates the second amendment, the right to bear arms. donald trump's spokeswoman has said a proposed meeting between the american president and the north korean leader, kimjong—un, will not happen unless washington sees concrete steps or actions by pyongyang. military personnel with chemical weapons expertise have been deployed in salisbury, to help with the police investigation into the poisoning of a former russian double agent and his daughter. sergei and yulia skripal remain in a critical condition after being exposed to a nerve agent. now on bbc news, it is time for click. this week, the app that helps record

and report sexual assault. the ai going after cancer. and the man who wa nts going after cancer. and the man who wants us all to the four other. —— live forever. as international women's day was marked this week, it brought with it further focus on the many issues still to be faced in bringing about true gender equality in all walks of

life. the technology industry, of course, has its own issues, as we will hear later. silicon valley's culture and its treatment of women raises a lot of questions. but tech can also be a force for good. it has been just can also be a force for good. it has beenjust six months can also be a force for good. it has been just six months or so since the me too movement gave a voice to so many women around the world, who used social media to expose just how widespread sexual harassment and assault is. many women feel that reporting sexual assault can also be really traumatic, and the experiences of some women in silicon valley had spurred them to create something that may make thatjust a little bit easier. our correspondent has travelled to stanford university to meet survivors of sexual abuse, and the creators of callisto. every tattoo tells a story. for this sta nford tattoo tells a story. for this stanford university student, the story is bittersweet. she was one of 50 sexual assault survivors invited

to share the stage with lady gaga during the 2016 oscars. while we we re during the 2016 oscars. while we were rehearsing, i remember at one point we were all crying and hugging each other, and someone just said we need to get a tattoo to commemorate this and to give us strength. something to look at when you are feeling down, and you know that you're alone. lin says that a few days after she was assaulted by a friend in 2015, she told the title nine office which investigate sexual misconduct. i decided to report because i didn't want him to do it to anyone else, and later i did find out that he had done a lot of... a lot of harassment, stalking, and also assault on someone else. what was that experience like? it was awful. my gpa dropped down, and i was fighting with the school back and forth every single hour of every single day. lin, now an activist, wa nts single day. lin, now an activist, wants greater transparency in the

adjudication process. they are trying to cover up the number of sexual assault that happen on their campus, because that makes your university look safer. it's better for your public relations. stanford told click... sta nford stanford changed its title nine process in 2016, and has begun reporting case numbers. in the us, one in five women is sexually assaulted while in college. one in five women is sexually assaulted while in collegelj one in five women is sexually assaulted while in college. i was sexually assaulted by a friend. over a year after that happened, i decided to report my assault, and i ended up finding the process of reporting to be more traumatic than the event itself. feeling not believed by the people who i thought we re believed by the people who i thought were there to protect me was incredibly destabilising. jessica lad's ordeal spurred her to create callisto, so survivors would have a

way of reporting sexual assault. they can have a timestamp, doesn't have to go anywhere if they don't wa nt have to go anywhere if they don't want to, send it to authorities in their school, or three, just say what happened to them for now but report electronically if someone else makes the same assailant. you can think of it as an international information as scroat agency. stu d e nts information as scroat agency. students often report to protect others. this matching feature helps do that by detecting repeat offenders. people might use different names, they may look different. how do you make sure you have got the right person? we ask victims to put in notjust the name of their perpetrator, but also a series of unique identifiers. currently, facebook profiles i used to match. some students want more ways to idea, and callisto may add mobile numbers and e—mail addresses in the future. 12 us colleges use callisto. the university of san francisco was the first. we knew

stu d e nts francisco was the first. we knew students won't reporting. if you look at our numbers from once we first started with callisto, three yea rs first started with callisto, three years ago, to now, there is definitely an increase in reporting. callisto allows for our students to write what happened, to write about the incident. and sometimesjust riding your perpetrator‘s name gives people power. seeing the need for callisto, she led an effort to bring it to stanford. it isjust available 24- it to stanford. it isjust available 2a — seven, and they have seen spikes in usage during times like spring break, when the title nine office might not be available, but stu d e nts office might not be available, but students wanted to file a report, or during the weekend, when no one is staffing. with callisto, survivors recount what happened at the own pace, privately. often victims including in—person interviews what is incredible, so they want to fill in the details and tell a wonderful story arc. at that is not how memory works, and that is particularly not how memory works in the event of

trauma. so being able to allow somebody to say i don't know the centre, i am somebody to say i don't know the centre, iam not somebody to say i don't know the centre, i am not sure that, and only record think that they are sure of, is really essential that that time stamped record isn't later used against them. students must create a username, password and pass phrase that be recovered. not quite a one click sign up. that deters some users. for callisto, it ensures drivers see. because then we would have to be storing the password, which means that we could potentially decrypt the data, and we wa nt to potentially decrypt the data, and we want to make sure that even we can't view it. since students choose whether to report assaults, some records are never seen by schools. they are still useful. we provide oui’ they are still useful. we provide our institutions with at an aggregate data report that gives them a better sense of what is happening in that record, what type of years are assault reporting, what classy as are involved? others are also working to make reporting less

daunting. the spot app creates a record from the user's conversation with a chat bot, while all will let them report electronically. lin is in short electronic reporting would have changed her was handled, but she see the potential. what i think callisto is great for is to track perpetrators, if they decide to apply for grad school or transfer schools, i think that is where this can really come in and have a very powerful effect. as we grow, we want to create one system, one database that allows us to track any perpetrator, even as they move through space and time. which would give survivors away to find out if there are seven is a repeat offender, something jessica ladd says she wonders to this day. that was sumi das, at stanford university. now, while callisto was created a team of mostly women, that

is rare. even right here in silicon valley. whenever i have been to visit, i have found it all too easy to think of the valley as sharing the progressive values of san francisco, where all colours and genders seem welcome. but the people i have met, those in charge of the start—ups and attack giants, have been mainly men. it is quite obvious to us that women are underrepresented here, and there are those who feel that silicon valley is just as full of sexism and masculine culture as anywhere else. it is the social challenge... emily chang is a san franciscojournalist, and a host of bloomberg technology. and in her new book, brotopia, she has written about the industry that has written about the industry that has always self—selected for men. first came the antisocial nerd who suddenly became part of the ruling class, and now she says it is the time of the cocky, self—confident

risk taker, the bro. silicon valley is the heart of the most powerful industry in the world, and that is the technology industry. this is a world that is controlling what we see, what we read, how we shop, how we communicate, how we get around. the reality is, the exclusion from this incredible and aggressive industry was not inevitable. it didn't have to be this way. i think of all the women out there who might have started the next facebook or the next google or the next apple, but never got the chance because they didn't look the part. and that is something that needs to change. women hold just 25% ofjobs across the computing industry. they account for 7% of investors. women led companies get just 2% for 7% of investors. women led companies getjust 2% of venture capitalfunding. companies getjust 2% of venture capital funding. the most companies getjust 2% of venture capitalfunding. the most important thing that we need to do is to acknowledge that silicon valley has become toxic for women. so what is bro culture? well, it is exactly what it sounds like. fratty parties,

beer, behaviour that is alienating towards women. i had 12 women over at my home most them engineers who work at companies like uber and google and the uber engineers told me they would often be invited to strip clubs and bondage clubs in the middle of the day, and so much of the working culture gets done outside of the office, so at the bar, at the conference, in a hotel lobby, and they are stuck in sort of an impossible catch—22. if they attend, they are disrespected and discredited. if they don't, they are shut out of important business and networking opportunities, because very powerful people, very powerful men, are at these parties. so many female entrepreneurs that i have spoken to have notjust one story, but several stories to tell about how an investor has crossed a line. you know, one of the most sort of egregious examples that i have found is an investor who... a very prominent investor in countries to make companies like twitter and uber

who often hosted hot tub parties at his home. well, what female driven wa nts to his home. well, what female driven wants to get in a hot tub and future business while wearing a bikini and drinking beer? these are the kinds of activities that have been very alienating the women, and u nfortu nately have alienating the women, and unfortunately have created a very unlevel playing field in silicon valley. i think about how different the world might be if women had been at the creation of some of these companies from the start. i sat down with twitter co—founder ed williams, andi with twitter co—founder ed williams, and i asked him, fwomen with twitter co—founder ed williams, and i asked him, f women had been involved in the founding of twitter, would online harassment and trolling be such a problem? and he said he doesn't think so. they were thinking about that when they were building twitter. they were thinking about all the wonderful and amazing things that can be done with twitter, they won't thinking about how it can be used to send death threats or rape threats. and as a result, online harassment is one of the biggest problems plaguing internet today. if women had been more involved in

building these products, and building these products, and building these products, and building these services, maybe online harassment and trolling wouldn't be such a problem. i fully believe that the people who have already changed the world in so many wondrous ways, the people who are taking us to mars, the people who are building self driving cars, the people who have given us right at the push of a button, if they can do all that, they can change this too. hello, and welcome to the week intact. it was the week that sony blocked the videogame super seducer for being released on the playstation 4. it has been criticised as too sleazy and for promoting toxic behaviour. dyson announced they will not be making plug—in vacuum cleaners any more, they will be working on their cordless range. the dating app

bumble has been band uses from posing with guns, though an exception has been made for military and law enforcement. and a robot managed to solve a rubik ‘s cube under a second. link you will miss it. here it is in slow mode. it was the week that mobile companies three and vodafone came under investigation over the way they handle data on their network. com is looking at whether they are intentionally slowing down internet speeds while customers are abroad. internet others invaded new york's museum of modern art, transforming the jackson pollock room into their own augmented reality gallery without the museum's permission. the project was called hello, we are from the internet. and finally, flippy the robot has been working at a resta u ra nt flippy the robot has been working at a restaurant in los angeles. their job, as you guessed it, is to flip burgers. using imaging and heat sensing to flip, flippy is being installed at 50 locations, but it is

not cheap, at $60,000 a robot. hope those burgers taste good. the idea of personalised or precision medicine is really gaining ground, and in the not too distant future, every single time we're prescribed something, exactly what thatis prescribed something, exactly what that is could be dependent on our height, weight, sex and even our genetic make up. personalising your medication doesn't always need complex biomedical data to be beneficial, though. what i have here is the beta version of the app. you input your data first, your height, your weight, your sex and details of any other medication you're taking, because that could have an affect. after you've done that you can put in information on what drug you're about to take. and this is how you do it. so this is paracetamol. now, i would probably take two 500 mg

tablets, so let's see the effect that would be likely to have. it's going to last about four hours, which is pretty much what i would have expected, but where this dark blue is showing it shows i could be ever so blue is showing it shows i could be ever so slightly overdosing, so someone ever so slightly overdosing, so someone of my height and weight maybe doesn't need to be taking to ta blets maybe doesn't need to be taking to tablets in one go. while the dark blue may represent a little more than needed, when you're clearly taking too much the dial will turn fully read. with a simple questionnaire on you, on your environment, on your body, with something like five or six seconds we can cover something like 90% of the questions and for the ten remaining % we need complimentary information, like ruh smoker or not, which kind of regimented you have, of course genetics. weitering pharmacists in the future strood have an important role to play in this ecosystem that we think. not only by selling drugs but by selling

the exact drugs and the exact dose for the patients. artificial intelligence is at the forefront of this revolution, analysing massive quantities of biomedical data that could transform treatment. well, imagine you're a scientist and you could read every piece of information that had ever been written about biomedicine. you could store that information and then you could use it to make new discoveries in diseases. there are billions of potential combinations of genes, diseases and drugs and here hugely powerful algorithms are at work to establish the best combinations. genetics will also play a central role in personalising what you're prescribed in future. astrazeneca are analysing genomes from over 2 million people, and this data could soon million people, and this data could soon be at your gp's fingertips. patients will actually be at the point where maybe they'll be able to go into the clinic, go into your

local gp, go into the clinic, go into your localgp, and go into the clinic, go into your local gp, and have that information already available. the doctor will then be able to look up not only the type of genotyping but also your individualjelic i, and match that to the best medicine for you. some people are even talking about doing this at birth so when you develop a disease, the doctor's already got your dna. so any one size fits all approach to medicine could soon become a thing of the past, with your prescription always being specific to your needs. that was la ra specific to your needs. that was lara looking at the very special techniques that may soon treat the diseases none of us want to face. but there are those who are going further, they're notjust trying to treat, manage and queue up life shortening diseases, they're actually trying to lengthen the

human lifespan. in and i'm assuming research facility in silicon valley, i met aubrey de gray, who is treating a project that treats ageing itself as a disease which can be cured. and he's made some seemingly quite outlandish claims in the past. am i right you are the guy that said the world's verse 1000 —year—old has already been born?|j a lwa ys —year—old has already been born?|j always make clear that i think it's credible. i do think it is credible. if we look at the care, it is very straightforward, the risk of dying in your 20s is low. if you get to your 26th birthday your chance of reaching your 27th birthday is very high. the only reason that people don't live to 1000 already is because of ageing, because their probability of death in the coming

year goes up. it happens to go up by 10% each year. 10% each year? 10% more likely to die at the age of 63 than you are at the age of 62 and so on. that's quite high. but if we can fix this damage that doesn't happen any more, the probability of dying stays only being limited by the probability of things that don't have to do with how long ago you we re have to do with how long ago you were born. what you're saying is within the lifetime of someone who has just been born you will learn how to effectively cancel out ageing? we've developed ways at the molecular and cellular level to repair the damage the body does to itself throughout life. this is called the longevity escape velocity. we're not talking about massively lengthening human life, we're talking about massively lengthening people's healthy lives. if people can stay healthy for longer then there would generally be

improvements in society. what do you see society being like if everyone had massively extended lifespan is? that's not what i focus on, what i get out of bed for is i don't like people getting sick. i don't like the fact 100,000 people a day die of ageing. i would like to hasten the defeat of that problem. also you got to ta ke defeat of that problem. also you got to take into account people are only going to get older one year per year. we're not going to have any 1000 —year—old people or at least 900 years whatever happens, and that's quite a long time to figure out what to do about it. the enigmatic aubrey de grey. can you imagine living in a world where we all might live to be more than 1000? that would be strange. mind you, first we all have to get past the year 2049, which according to the recent blade runner movie, is a pretty bleak time. that film won the oscar for best visual effects last weekend and to celebrate we thought weekend and to celebrate we thought

we would bring you a bit of extra behind—the—scenes science that went into making that world. behind—the—scenes science that went into making that worldlj behind—the—scenes science that went into making that world. i think you found him. that's not possible. if this gets out... we've bought ourselves a war. there's obviously a huge responsibility to deliver something for the audience of blade runner for the first one. the expectation visually making everything look cool is on our mind every day. the demands of vegas and the expectation of making something that was based on what we know vegas now but what it would be in the future, so we started with the us geo data, the vegas valley and the city itself. so a simple model in the computer. david gassner, the art director of the film, add a simple model of vegas with buildings placed around and so forth, we took those two and smashed them together initially. we look for ways very subtly of how to bring in the human element into the

shots, how to sell that scale, analysing the work and how to use graphics on the face of the buildings, how here in a lot of his paintings used human scale futuristic items. we build all that stuff and placed it around the city in an organised way to make it look like people were there at one time, even though we see no one, and that's what made it look real or looked like a place people could have been in. to build trash may soak was based on the idea that eve ryo ne soak was based on the idea that everyone had moved to the city and all the structures are outside the city had been pretty much abandoned. no power, no water outside to the trash is generated for the city was dumped on the buildings outside the city. again, we're trying to based things, as much reality as we could so we things, as much reality as we could so we started with the landscape of current day california from los angeles versus san diego and we determined icelander was the place

to photograph the ground skate and the beach. so through aerial photography of that we placed in the two on top of each other and then the sequence of the ships was based on the bangladesh ship harvesting ya rd on the bangladesh ship harvesting yard where they recapture all the metal and so forth that happens now. a lot of the ships and the pieces of the ships and the idea of these little tiny human beings working on these massive structures sort of growth that look through the middle of that sequence. so it's a matter of that sequence. so it's a matter of grabbing all these components that were based on today's reality, scaling them so did have this sort of massive relationship between kay and his little spinner in this enormous landscape and these huge amounts of trash. it was a matter of pulling off that scale and distance, which was just pulling off that scale and distance, which wasjust a pulling off that scale and distance, which was just a massive, the undertaking in terms of the amount of data and assets we had to build and things we had to manage in itself to pull that off. the future

of the species is finally unearthed. it isa of the species is finally unearthed. it is a brilliant film, absolutely superb. blade runner 2049, a well—deserved oscar winner there. that's it from us for this week. don't forget we live on twitter and facebook. thank you very much for watching and we will see you soon. hello there. very different feel to the weather this weekend. it looks like we will see very mild conditions for most of us compared to what we had last weekend. a big area of low pressure moving up from the south—west, feeding in the mild air. but a lot of cloud and also a lot of rain, too. rain continues to move north

during the overnight period. not really reaching the northern half of scotland. so here it will remain chilly. but much milder airfeeding into england and wales. by saturday morning, 10—11 degrees the overnight low here. further north, again, cold across central and northern scotland, with frosty start to the day. mild start to both saturday and sunday for all of us. that mild air spreads into scotland as well. it will be cloudy with some rain at times. but given sunshine, that's where you will feel the mild weather. one front will be followed by another following later in the day. a messy picture to start saturday. the rain will lie across northern ireland, northern england, pushing north into scotland. a bit of snow over high ground as it encounters the cold air. central parts of the country will see some dry weather before this next rain comes from the south. some of this could be quite heavy. for orkney and shetland here it will be a cool day. temperatures in single

figures with some sunshine, the same too across the far north to scotland. through the afternoon, it will be turning much wetter for the scottish mainland into northern ireland and northern england as well. the showery band of rain will continue to move north. notice the temperatures — 14—15 degrees. you could even see 16 celsius given some prolonged sunny spells. now, the drier weather across the south—west will continue to advance northwards during saturday night. actually not a bad end to the night on saturday. into sunday, though, it looks like it will be a cloudy, damp start. but there will be brightness across the northern half of the country. further the south, we start to see showers developing. some could be heavy, maybe even thundery. again, it could be mild. 12—13 degrees in the south.