christians. at least 28 people were killed in the ambush, south of cairo. the united nations secretary general says the paris climate change agreement will not collapse if president trump does as he has threatened and withdraws the united states. antonio guterres called on donald trump to stay engaged with the agreement. newswatch is coming up later. but now on bbc news, it is time for click. graffiti art has been one of the hottest art movements over

the last few decades. like many graffiti artists, graeme — or xenz, the name he goes by — cut his teeth on the streets. in this case, the streets of bristol. and he has since grown into the artist that we see on the roof of his east london studio. today, he's taking a break to do this for us. but he's more known these days for these amazing natural scenes which are exhibited and sold all over the world, and which incorporate all of the graffiti techniques that he's honed over the years. yeah, over time you really understand what the can is about to do. you know, you come to rely on these tools, like the nozzle or the weight of the can. like the way that i use the edge there to keep one edge sharp and one edge faded, then this, you know, different lines, adding colours. so there's a lot of disciplines that go through painting that are the same here, you know. years of practice...

no, we don't have that kind of patience. so could we pull off something similar to this by combining technology with someone who has no creative talent whatsoever? to find out, we sent nick kwek to estonia. tartu, estonia's second—largest city. like most cities, graffiti and street art provoke around every corner. if you know where to look. it's also home to one of the biggest spray—painted pieces i've ever laid eyes on. but albert's been painted dot by dot, and i've been promised i too can achieve artistic genius with the right tools. believe it or not, these pictures have all been painted with spray paint. they've been pieced together splodge by splodge by the sprayprinter device. my daughter wanted a unicorn on her wall, but i couldn't draw.

so that pushed me towards creating this device. to make these magical masterpieces you need the right kit — a smartphone with the appropriate app installed, an external battery pack to keep it fullyjuiced, a tripod to hold it steady, some paint, and of course the sprayprinter. first you select an image and align it against the area you want to paint. so the image is projected like a giant virtual sticker. portraits with shadows work best. the phone's camera exposes for the led on the device, and when it illuminates, it sends the can's location to the app. the phone then tells the printer its coordinates and the printer decides when to spray and when not to. once you get the knack of it, it's actually surprisingly simple to use. you just have to make sure you go from left to right,

or right to left, very smoothly, in a straight line. for all its geeky brilliance, it's a real labour of love. even the most simple of designs takes several hours. depending on how complex the picture, and the size, the amount of layers, the different colours you want to paint with, you know, that determines how long doing one of these is going to take. you need to move your hand relatively steady, so if you start moving your hand very quickly you're losing accuracy. not sure i could really stand your for several hours doing this. with the next model, you should be able to move your hand relatively freely as you would with a regular paintbrush. to give your arm rest, the team have already started developing robotic versions to do the spraying for them, meaning larger more complex images. i developed this extra accessory for the sprayprinter to atomise

the process, because for high scale images the hand—held method takes too much time and effort. soon, others will be able tojoin in too, hopefully speeding things up a bit. but does the printer help artistic expression, or simply kill it? a person who can't draw at all, this gives like guidelines of how to paint. it's like sort of a colouring book, but you can go over the lines, but the paint will still only land in the right places. i think for people like myself, we call them artistically challenged... laughter and i think this device gives them new power. the finished result? it started off only a few small dots. you actually have to stand back a few feet to get the full view, to get the right perspective on it.

how good is that? yeah, and in true blue peter fashion, here's one i made earlier. yeah, all me. entirely done by me. all of it. well, that was nick kwek with the sprayprinter. graeme, worried? not really, no. i mean it's a great tool. it works like a projector. it helps us to get these large images up easier but no, i think i'm quite comfortable in what i'm doing right now. i might use it one day though. it definitely has its advantages, for sure, yeah. one of the brilliant things about working on click is that we all get to achieve our lifetime ambitions at one point or another, which is why this week

mark cieslak became the captain of a starship! he took some of the rest of the click family with him, to boldly go where no mark has gone before. space, the final frontier. these are the virtual voyages of the bbc click team. our mission: to wear vr headsets and discover strange, new technology, and boldly go where no tv reporter has gone before. virtual reality game star trek bridge crew brings together up to four players, each taking a different role on the bridge of a starship. the beauty of going where no one has gone before is that starship travel involves an awful lot of sitting down. sitting down is great for virtual

reality because the headsets have got these cables. if you're moving around it easy to get caught up with them. sitting avoids all of that. and where better to be sitting than the captain's chair of a federation starship? headsets on, it's time for the click team to become a starship crew. wow. it's really strange. that's brilliant. incredible. oh, my goodness, mark! hi. i'm dabbing. all right, people? let's trek some stars. the early missions are all about orientating us was the bridge and how we interact with it. as helmsman, you are the ship's navigator. the headset shows us what the bridge looks like, but the playstation motion controllers allow us to interact with the various controls we have to master in order to fly the ship. help.

yes? walk course to gamma hydra. engage. 0h, we're warping, everybody. 0h! wow. that's pretty, isn't it? that's good. wow. we don't have time for sight seeing, though, as we receive a distress signal from a stricken vessel. my vessel has lost all power and our life—support systems are nearly exhausted. here we go. scanning now. get on that scan. ok, so, engineering? yes. can you transport the survivors to here? i don't know. chuckles that wasn't in the training. laughter we're homing in at an alarming rate, captain. there are no options within transporter. it says right there in the list. transport, energise. it's at this moment that the action takes a turn which will appeal to star trek super fans.

0k, guys, this is the kobayashi maru scenario. this is an impossible to win situation. 0h! it's a d51 cruiser. it's a klingon d5 cruiser? yes. 0k. target it. bring it about so we can actually see that the vessel. bring it in behind it. come on! west, west, west. turn it, turn it, turn it. find us. operating. there it is. ok, bring in those torpedoes. line up the phasers, and torpedoes away. get us back behind it. target destroyed. 0h! yeah, everybody, we just violated a peace treaty. wow.

oh, wow. it's pretty warm work being in virtual reality. it feels like it's social vr at its best, really. communication‘s a must. if you don't have it you're not going to complete the mission. great for team building. i thought we actually had our lives on the line for a minute. that ably demonstrates the power of teamwork. it's really, really important that everybody plays their role on the bridge, because if you don't then chaos ensues. we had a couple of sticky moments there, but i think we managed to pull it back and keep it together as a crew. and the result was a successful mission. brilliant. that was mark and the crew. that's it for this week. follow us on twitter at bbc click. or like us on facebook, too, where you can see lots of extra content and videos. now, while you're watching this we are doing a live show at the hay literary festival in wales. and next week on the programme you can see a little bit

of what we're getting up to. can't wait. and if you're coming, i hope you enjoy the festival. and we will see you next week. hello and welcome to newswatch with me, samira ahmed. after the manchester arena bombing, we discuss how news should report the horror of a terrorist attack, without giving the perpetrators the publicity they crave. and we look at how newsround cover that news for its young audience. it was shortly after half past ten on monday night when the news came through of what would turn out to be

the worst terrorist attack in the uk for almost 12 years. let's break away from the election campaign for a moment, we've got some news coming into us from out of the north—west, greater manchester police have warned people to stay away from manchester arena, as officers respond to what they are describing as an incident, amid reports on social media of some kind of explosion. by the following morning, the scale of the violence had become clear. breakfast invited three of those who had been at the ariana grande concert into the studio. i'm still processing it myself. i really admire you for coming on this morning and talking with such honesty about this, because there are all sorts of quotes that people have come out with, we will fight back, we will go on and we will continue, but at a time like this, ciaran, it is devastating to be involved in that and be part of what happened last night. yes, no, it is definitely devastating. that discussion divided newswatch viewers with anne williams one of a number concerned that the three

young people were clearly traumatised. ifeel that at their age and so soon after the event, they should have been speaking to a trained counsellor, not the bbc. but adrian clark was also not alone in writing, i would like to commend the breakfast team for the sensitive and compassionate reporting this morning. in particular, i think dan walker did an exceptional job. he seemed to be empathising with the pain, showing compassion but also authority when it was needed. over the days that followed, though, there were further complaints about other eyewitness interviews and some of the images shown on television. on wednesday, the diplomatic row with the united states developed after the new york times printed close—up photographs of fragments of the bomb used and the apparent tattered remains of the backpack that held it. those photographs were also shown on bbc news, prompting craig rolfe to beg, please stop showing the pictures of the bombing evidence. you know that they can cause distress to the families of those

concerned as you yourself have stated on television. it's time to stop pointing out the errors made by others and using it as an excuse to then do the same yourselves. the point was made by others as well, as in this anonymous telephone call. i am absolutely disgusted. the government was completely outraged by america showing pictures of the manchester bombing and the aftermath. and then the bbc showed a photo. i thought that we were better than that. there were more general concerns about the quantity of the coverage, playing into the hands of those responsible for the atrocity with mark dunsford wondering, is repeated analysis over every little detail really necessary or just counter—productive sensationalism ? by focusing on this one story to the virtual exclusion of all others, are you in effect aiding the terrorists by providing them with the oxygen of publicity? other viewers objected to the repeated use of video showing