thousands of far—right demonstrators to disperse over safety concerns. they say that the anti—migrant rally, which drew more than 4,000 participants, had overrun its authorised time limit. earlier, several thousand counter—demonstrators attempted to block their route. tributes have been paid to the late senator john mccain at a memorial service in washington. two former presidents, george w bush and barack 0bama, led the mourners, praising his patriotism. president trump, who'd feuded with him, was not invited to the service. there's been criticism of the decision by the united states to withdraw all funding from the un agency that provides assistance to palestinian refugees, amid fears it could further destabilise the region. a spokesman for president mahmoud abbas described the move as a flagrant assault against the palestinian people. those are the latest headlines. now on bbc news, it's time to click. this week:

get your skates on for security games... yes! ..ball games. highjumps. this is what it feels like to be on the moon. and robot drinks. this is the business card of our first guest on the programme this week, google‘s self—proclaimed security princess. parisa tabriz is one of the biggest names in cyber security. the buck stops with her if, for example, chrome, google‘s browser, is hacked. and if you've ever seen these while you're browsing, these little padlock to help us to know if the link between your computer or phone and a website is secure. parisa is behind google‘s push to get more websites to use

the encrypted https protocol. now, not all hackers are bad guys, of course. parisa employs about 200 of them in a specialist unit called project zero. they hack all sorts of software before the bad guys do before any vulnerabilities can be spotted and fixed. they're like a police force but they all wear hoodies, because obviously that's all that hackers ever wear, apparently. anyway, dan simmons went to chat about all these things with parisa at the world's biggest cyber security expo, black hat. the security princess is informal, controversial and, unusually for the industry, she's a woman. so honours even with the paper—scissors thing, we agreed to start there. so who gave you the title of security princess? self—appointed. i came up with it myself.

when i started at google i had a job title — information security engineer in the information security team, which i thought was a mouthful and also not very meaningful. so i was actually going to go to a conference and they told me you need to make business cards. and so i was, like, well, if i was going to have a meaningless job title, at least going to make it sort of cute and whimsical. and it served me well because i think there's a lot of people who are really serious in security and come from defence, you know, they have their a—star generals and certifications, and when they see a card that says security princess it is a bit shocking and they smile and it's a nice icebreaker, so... on a serious note, you're one of very few women at your level in the security industry, even in the it industry, but specifically within the security industry. what's it like? yeah. when ijoined chrome to lead their security team, i was the only woman, and now we have a whole team that's actually majority women,

and they're the one who are actually responsible for all the work that we've seen to push https on the web. what are things you pick up on that you think, actually, i reckon that probably does put quite a few women off? i hear a lot of stories. and, you know, very subtle things, like you go to an event and there's women that are, kind of, dressed in scantily—clad outfits and that's, like, the major woman presence there and that doesn't make you feel included and respected as a professional. small things like support for mothers so that they can actually participate, i think would actually make environments much more inclusive. one of parisa's achievements is to persuade or gently bully webpages not to use http and use https protocol to deliver their content. although not everyone‘s convinced,

the vast majority of big websites have switched, especially once chrome started warning users the old system was simply insecure. i think reasons in the past were, like, it's going to be expensive, it's going to make things slow, it's not going to be worth the effort, but what i think is for that blog, you still want the people reading it, even if it's just your friends, to get the content of your blog and not have, you know, the isp interject ads or other content into your blog, and the only way you get that is with https. is there a scenario where if a webpage is http, google chrome won't deliver it in the future? i don't think so, no. no? chrome at the end of the day is a browser and it's meant to help users use the web, and http is a protocol that the web has relied on, and so we want users to be able to access that content over any protocol but we also

want to indicate to users, look, you can't have any confidence in how this data was actually transmitted to you. project zero gets hackers to find bugs in any software on the web. they give vendors 90 days to fix it or they go public. doing that has actually incentivised more change in industry in terms of being able to fix security bugs faster. because before you started, 25% of those problems got sorted in 90 days, i understand? yes. and now it's what? and now, the vast majority, like 98% of issues are fixed within the 90—day disclosure policy. is there something on the horizon that you are worried about? we're seeing computers in everything now. it used to be this big clunky machine that you had in your house and now, everything is a computer. screens in your house and speakers and devices and your car, i think there's a lot to be figured out but i'm an optimist, we'll figure it out.

you have to be a genius to be in your position? no, you don't. i am not a genius. you have to be a genius? i'm not. i'm really not a genius. if there's one thing i want you and everyone else to know, i am not a genius. i work hard, i embrace learning, and i think as you get you're kind of afraid to fail but that's how you learn. i see my parents being very afraid of technology and feeling like "i don't know the right way to do it" so they don't want to try. but technology's always evolving so you have to try things and very rarely will you do something that will render the machine completely un—useful and explode. so i think embracing learning and trying things is important as you get older. can we do one more, because i know i lost the first one, so... sure, sure. yeah? three again? 0k, got it. oh, yes! until next time, parisa, thank you very much. thank you.

now, over the years, we've tried more than our fair share of weird and wonderful transport devices. there was the 0newheel. the airwheel. the something or other. blimey, there was even this self—queueing robo chair injapan. the grand daddy of all of these self balancing devices was of course the segway, and as the click team took part in the segway world cup recently, we celebrated the wonders of the smaller, lighter sensors that gave rise to this entirely new category of transport. and, if you thought we'd now exhausted all the wacky ways that you can get around, hmmm, you'd be wrong. we sent chris fox to the efa tech expo in berlin to get his hands... well, actually his feet, on the very latest set of self—balancing wheels. the worst thing about rollerskates, for me at least, is the process of putting them on and taking them off, so it's nice to see these have

no straps at all. i canjust step on and in minutes, i'll be rolling around as gracefully as these professional dancers, although i did notice that even they had difficulties now and again. i've already mastered the art of rollerskating, and i can ride a self—balancing unicycle... sort of. so this should be a doddle. already moving! alright! whoa! i'm not... 0k. like a segway, these skates are self—balancing. you just step on and lean forward to go. and with a top speed of around 7mph, they go pretty fast, at least for a beginner. 0k. to turn, i have to apply pressure on just one foot. so let's do a corner here. nailed it. and after i relaxed and did a few

laps on the training circuit, i did actually get better at it. yeah! i've just about reached that point where my legs kind of understand it now and i'm a lot more comfortable doing it. this is segway‘s vision for the skates. not business people riding to work in their suits, but carefree youngsters zipping around a city and laughing. though it's worth bearing in mind that lots of countries have banned electric rideables like these skates from the streets. i know in the united kingdom, they are still forbidden on the streets. if you go to paris, all the products, for example, are perfectly legal and allowed to ride on the streets so you will see a lot more of them in cities like paris or many other cities. so how do these compare to other rideables like the so—called hoverboard? well, i'm inclined to think they look a little less silly and i'm told having your feet separated lets you learn some cool tricks, although i'm probably not

quite at that level yet. 0ne leg in... 0k. i've got some more practice to do. hello and welcome to the week in tech. let's start with a quick tour of efa berlin. first up, sit back and don't relax as you are engulfed in this amazingly over—engineered motorised cockpit. the acer predator thronos comes with a reclining seat, deep—impact vibration function and support for three monitors. time to start saving up. no price as yet but expect this rig to be unbelievably expensive. with that sort of spec, i'm hoping it comes with a cup holder. 0ther efa bites include this mystifying take on a smart speaker from design—centric bang & 0lufsen. roll it to control the volume, it'll roll back on its own. why not? and polaroid's latest offering lets possessive picture—ta kers give away the paper version and keep a copy on their smartphones. ok, that's enough from berlin. it was also the week that zmp,

the autonomous driving company, partnered with a japanese taxi firm to make a driverless taxi. the two—week trial saw vehicles travelling 5km autonomously, although they did have a back—up driver and assistant on board. they aim to implement the tech for the 2020 tokyo 0lympics. compare that cutting edge technology trial to this from jaguar land rover. researchers think giant googly eyes on an autonomous pod will reassure pedestrians that they have been seen. it's actually a test to help understand the perception of safety. well, the googly eyes can stay as long as that pod has a sweet sound system. now, in my experience, one of the big themes of almost every efa tech show is the smart home, which usually means the very latest version of a fridge with a camera in it unless you can't —— in case you can't be bothered to open the door,

but lara lewington has managed to hunt down some actually useful smart homery. there's been no shortage of smart home devices over the past few years, but which ones would you actually want? this small plastic bin is the prototype of something called the bindicator. the idea is it will connect to your local council's website and will then change colour depending on what bin needs to be collected. so it does solve a problem but the question is, do you really want it sitting in your house? one thing that isn't a matter of opinion, though, is that we all want to make sure our homes are safe. yes, it has the sensors, it even has the photo sensor which will take five photographs every time a movement triggers it, that's of course only when the alarm is actually set, but this is the real difference — a fog dispenser which will fill the room with fog, so if somebody is about to steal something, well, they might not be able to even find it. once the alarm is set, the control centre will be able

to access sound and pictures. the activation ofjust one sensor is then enough to alert a human to trigger this fog if needed. whoa! oh, it's quite something. i'm glad i didn't get thejob of being the fake burglar! oh, it does catch in your throat a bit and a bit stingy on your eyes but i've been assured it's perfectly safe, it's passed some sort of eu regulations, and apparently it leaves no residue inside anyone‘s would be slightly off—putting. but right now, i think ijust want to move out the way. i was also warned it may irritate pets. but of course, it would be better to stop a would—be burglar at the first hurdle — the front door. this isn't the first smart bell that i've shown you but it is claiming to be the first that offers person detection and facial recognition. doorbell rings.

robot: simon is at the front door. simon's at the front door! hello, simon. i'm just going to come and get you. full functionality does require a subscription. it can then recognise faces, as well as unlock live video recordings, which can be available up to five days after they were captured. you can also pretend to be in when you're out. or, of course, vice—versa. they do say there's safety in numbers, though, so maybe you'd like some company. if you were starting to think your home virtual assistant was a little bit low—tech, then maybe it's because you've been waiting for a home robot. now here you can do video calls hands—free. it also has the other functions that you'd expect from a virtual assistant. hey, temi. what's the weather in london today? temi: here is the weather in london, united kingdom. today 2! celsius and mostly cloudy throughout the day. through facial recognition

and identifying your shape, it can also identify you and follow you around. it recognised i go to the sofa, it's just not done it. hey, temi, go to the sofa. i think actually, sadi, you look a bit too thirsty. i will pass you a drink. no need to move. they, temi, go to the sofa. brilliant, thanks. it recognised i go to the sofa, it's just not done it. hey, temi, go to the sofa. i didn't get that. go to the sofa. i'm going to the sofa. thank you.

it does need a strong wi—fi connection and we all know voice recognition still has a way to go but still, you'd better make sure that your guests weren't too thirsty. better luck next time. that was lara. now, last summer i travelled to los angeles to meet two guys who had an ambitious plan. they were going to revolutionise fun. brent bushell and eric gradman are two engineers who had a dream, to take their travelling hi—tech roadshow and give it a permanent home in this big top. it's taken a while, longer than planned, but the opening night of the two bit circus is upon us and nick has been to have a look. today, i'm doing some serious journalism. the circus is behind schedule. i've rolled up my sleeves and i'm not leaving without answers. it took a bit longer to get a few different things green—lit

than we needed, so a month behind, but a project this size, i consider that ahead. you said early 2018. that's true. the updated data, we are ahead of schedule. that's that then. one thing is for sure, the circus is finally in town with the same professional clowns at the helm. same blue shirt, same mad mohawk. eric and i are trained clowns and eric was in a running circus for two years, and we are engineers, i've been an entrepreneur my life but the playful and the whimsy you get from clowning is particularly wonderful when it comes to public entertainment. two bit is a surreal play land, a fluorescent mix of code, clowning and good old—fashioned nostalgia. this is balloon pop, but we mixed it with a connect three game.

trying to match three? get the balloons to disappear. crazy cameras up on the ceiling, seeing what colour the balls. this is fun. i'm pretending to listen to what you are saying but i'm extremely distracted. how many years to perfect this? the tech or the ball throwing? both. this is the culmination of many, many hours of programming. when you hit a virtual trumpet, pumps in the ceiling blast air into yourface — rather startling. i've been trumpeted. do you want to feel what it's like to destroy the building? yes, i do. as fast as you can! this is a suspending ranger laser finder like the type you find on autonomous cars.

that is so the computer knows exactly where the ball is hitting. how are the floors moving? iron sub—woofers under your feet. we often start with a configuration or a sensor that we want to use and kind of make something fun around it. that is how this one got started. i worked up quite a sweat, what is next? welcome to the bridge of the space squad infallible. the real brain behind the operation is right here, i see. there is a weapons station, an engineering station, science station, a captain station and at each one of these consoles, a different person helping fly this ship into space. how many bits are part of the game? a good question. it is hard to count the number of games. we like to think in terms of the number of people who can be entertained.

entrance is free but each game is pay to play. in the city of angels, today's hot ticket can soon become yesterday's sideshow. so how are the guys going to keep the crowd coming back for more? everything we put into two bit circus is a platform for the developer so vr can transport you to another world that you can go to any number of different worlds with vr and we want to explore different experiences, we can build different arcade games on top of the platforms were built. 0ur story rooms are episodic and software—based, so we can create new experiences and go deeper with every one of these experiences without having to build more physical hardware. we will soon see if the circus is a sell—out show or straight to dvd. well, if they are ready in time. the winner! in my defence, i may have played it before. i may have even made it.

welcome, astronaut. you are about to embark on your first extravehicular activity on the moon. the suit will be wearing consists of several elements to enhance your experience. a suspended safety harness, a personal telemetry system to track your body movements, and finally, a samsung gear vr headset and controller to help you see objects in your environment. in the run—up to the 50th anniversary of the apollo 1! moon landing next year, creative studio framestore and samsung have been touring the world with their lunar vr experience called a moon for all mankind. only 12 white male american astronauts have walked to the moon. no other nationalities or gender or race, so i like the idea of opening up the moon for everybody.

while vr headsets can track will respond to your head movements and some will allow you to move around in 3—d virtual space, to really feel like you are on the moon, you are going to have to lose some weight. this beast is based on nasa's own variable gravity simulator called argos, the active response gravity offload system. ok, the rig is now going to weigh me. and then work out what my weight would be on the moon. and then it knows how much extra lift to give me whenever ijump and how slowly, to make me descend, in order to simulate one—sixth gravity. wow. this is what it feels like to be on the moon. the experience hasn't even started yet and i'm having a good time. unlike more advanced vr headsets,

the gear vr can only tell which way your head is pointing. the vertical position in the arms and the legs are tracked by the sensors on your suit. here we go to the edge of a crater now. the earth looks amazing. now unfortunately, if you are sensitive to a mismatch between your senses, the fact that you think you are moving forward across the lunar surface is actually you are going up and down may cause a little bit of discomfort. i'm going to get out of here because there seems to be a meteor shower. it certainly makes brain exhilarating ride, though. definitely more dramatic than any of the lunar astronauts would have wanted. oh, my goodness. my helmet‘s cracked. mission accomplished. how's that? i survived, but it was close. well, that was certainly

an experience that you can't get anywhere on earth, apart from i suppose. that's if this week. don't forget we live on facebook and twitter. we are @bbcclick. thank you very much for watching and we will see you soon. take your first leap. hello. saturday's top temperature — 25.2 celsius in hull. eastern parts of the uk that saw the lion's share of the sunshine. high—pressure still close by for part two of the weekend. there is a weather system approaching from the west and so, for some of us, it will be quite a wet end the day. let's take a look at things first thing in the morning, though, and there will be a lot of cloud around northern and western parts of the uk. that's held the temperature up overnight into the mid teens. still a bit drizzly in places. just a few spots in eastern england, down into single figures under the clearer skies.

maybe one or two mist and fog patches clearing away. quite a windy day for northern ireland and scotland. gusts in scotland around 30—a0 miles per hour. still plenty of cloud in the north and west. some sunny spells north—east scotland, more especially into eastern england. here's a look things at four o'clock in the afternoon and we will see rain spreading in towards western scotland and northern ireland to end the day, so increasingly wet going into the evening here. those sunny spells north—east scotland, though, lifting the temperature into the low 20s. even under the cloudier zones, we could well see some brighter spells but with the chance of a bit of patchy light rain. some spots in east anglia and south—east england will see unbroken sunshine. that's how it's looking into the afternoon then. as we go into the evening, that's your rain to end the day in northern ireland and western scotland. really moving very slowly further south—eastwards as the night goes on. behind that weather system, where you're clear in northern ireland and scotland, it will be much cooler. ahead of that weather system and with the cloud and outbreaks of rain, it will be quite a warm night to come. so for monday then, that weather system is continuing to move its way southwards, but i tell you what, it is a very, very slow process. there's a cold front.

it's the dividing line between the warm air to the south of it and the cooler air following on behind. so, as we look at the picture for monday, we're into that cooler air in northern ireland, much of scotland, some sunny spells, feeling much fresher. still some outbreaks of rain for eastern scotland and pushing across more of northern england, the midlands, wales and the south—west. to the east of that weather system, still some sunny spells, still some warmth in east anglia and south—east england, wherever you get to see a bit of sunshine. so a bigger range of temperatures, a range of weather, as we go through monday. that continues to spread south on tuesday, taking the cooler air. for the rest of the week, though, wednesday onwards, a bit of cloud around, some sunny spells, temperatures close to average but quite a bit of dry weather to be found. so for the week ahead, it will be turning cooler for a time from the north, but plenty of dry weather to come with high—pressure still close by. hello and welcome to bbc news.

in germany, thousands of far—right demonstrators, with many chanting nazi slogans, have been marching through through the city of chemnitz. it's a week since a german man was stabbed to death there, apparently by two asylum seekers. this triggered a series of violent demonstrations. the far—right political party afd has been accused of inflaming tensions. 0ur correspondent jenny hill is there. fury, hostility on the streets of chemnitz.