this is bbc news — the headlines: day four of the tokyo olympics has got underway — and the first medals have been given out. bermuda's flora duffy won gold in the women's triathlon — ahead of team gb's georgia taylor—brown. it's bermuda's first ever gold — and they are the smallest nation competing at the games. new figures from the un suggest afghanistan has seen a record number of civilians killed in the first half of this year. the un says there's been a 47 percent increase in deaths the inuit rights advocate — mary simon — has become canada's first indigenous woman to hold the post of governor—general. at her swearing—in ceremony — the official representative of queen elizabeth pledged to strive to build bridges across the diverse backgrounds and cultures that reflect canada's uniqueness and promise.

214 year old boys have been found guilty of the murder of ollie stevens would elude into a park in reading. the ollie stevens would elude into a park in reading.— ollie stevens would elude into a park in reading. the girl was convicted _ a park in reading. the girl was convicted of — a park in reading. the girl was convicted of manslaughter. - a park in reading. the girl was convicted of manslaughter. he i convicted of manslaughter. he was attacked by boys carrying knives. none of the guilty can be identified for legal reasons. ollie stevens seen on the neighbours camera. his phone messages show he'd arranged to meet a girl as a nearby park that january afternoon. this beauty spot just a few hundred yards from his own front door but ollie walked into an ambush. two boys aged 13 and 14 who'd fallen out with on social media. in the attack, ollie was stabbed once in the chest and once in the back. the two boys and the girl then ran away from

the park, throwing away the knife as they fled. today the crown prosecution service said that also deleted shared videos and messages to try and cover crime but they said it was their digital wind that had proved to be their undoing. passers—by called an ambulance and alerted ollie bosman parents. they ride just for ollie died from his injuries in the back of an ambulance. the court was sure the spoon footage of one of the boys playing with a knife in his bedroom, the other also had pictures of knives. at the scene of the attack now, tributes to ollie where neighbours have been laying flowers and hanging messages. i feel sorry for the parents that lost their son. he didn't even enjoy his youthful life. so it's really sad. every time i come here, ijust come and pay my respects to ollie. wide ollie bosman families of the callous and coldhearted killing had devastated the family. the son, they said, was precious

gift. his death, the stuff of nightmares. the two boys, now both 14, today found guilty of murder. the girl had previously admitted ollie bosman manslaughter.- admitted ollie bosman manslaughter. admitted ollie bosman manslau . hter. , manslaughter. there will be sentenced — manslaughter. there will be sentenced in _ manslaughter. there will be sentenced in september. i now on bbc news, the travel show. this week on the travel show: outrunning covid at the olympic games... ..the big names rocking central park this summer... ..siberia's mystery blast craters... to have an exploding crater on land is not something i imagined. ..and the fears for the future of flamenco.

hello and welcome to tokyo, host city for this summer's olympic and paralympic games, and thronging with tourists and sport fans from all over the world. ok, maybe not. the state of emergency declared earlier this month, following a new wave of covid cases means that international and now local spectators are not allowed in to any event in and around tokyo. nevertheless, athletes, trainers and medical staff have headed here from all around the world for a more subdued games. there were plenty of people here in tokyo who were delighted to see the olympic

opening ceremony on friday. even if they had to resign themselves to only being able to watch it live on tv, rather than in person at this vast stadium. however, they could be in the minority, as some recent surveys showed thatjust over 50% of people here did not want to see the games go ahead. japan has declared a state of emergency for tokyo that will run throughout its hosting of the games. and public concern has grown over what impact the influx of thousands of athletes, support staff, officials and press from overseas could have on the infection rates. for me, like many people here in tokyo, the olympics has been a real rollercoaster. in 2019, i got tickets for athletics and diving events in the first round of the lottery. and then last year we were not even sure if the olympics would happen.

and then we were told this year that our tickets would have to go back into another lottery because of limited capacity at the stadiums and then finally, two weeks ago we were told that there would be no spectators at all at any tokyo events. and here at yoyogi park there was meant to be a fans zone with big screen tvs, but that idea was quickly quashed. pre—covid, japan was originally expecting around 35 million visitors in 2020. but now only vaccinated athletes and officials can attend the tokyo games this year. that number has been massively reduced. and with the capacity of the olympic village limited, many of tokyo's hotels are playing host to athletes and sports support staff from all over the world, with strict sanitising protocols, regular testing and in some cases, curfews and other restrictions now in place. this hotel was not allowed to tell me which teams would be staying here, but they were

willing to show me some of the adjustments they've had to make to ensure that their sporting guests have a happy and healthy stay. in addition to ensuring the hotel is covid—secure, the carpenters here have also been busy at work too, in readiness for some extra tall special guests. we had some requests from some athletes to make larger beds. 0h! so here they are. these are wooden bases for the extension and we will make 12 of them. so i can assume you will have some very tall athletes staying? you are correct. the normal size bed is two metres, so we're extending it by 30 centimetres. here we are. this is the room where we have put a larger bed for our guests. wow.

this is a big bed. yeah. good, hey? and you cannot notice where our carpenters have made the extension. very neat. and it is notjust a good night's sleep that the olympic competitors need. nutrition plays a vital role in their performance, so the kitchens here have had to adjust their menus accordingly. they want at least eight different salad bars, so it can be from carrot, celery, cucumber, and broccoli, you know? they prefer to eat raw than cooked. i have designed a menu, here i have added three carbs, five different vegetables. the nutritionist and the chef look at it and they come back to us and let us know if it is ok or not, if it has too much sauce. wow, it all has to go back to their nutritionist? yes. so i see we have salad, grains, is there dessert? a little dessert. they cannot have too much sugar because when you have sugar... you know, it doesn't help you.

the dessert is more like a bite. a dry food bite. they call it energy balls. so what are we making today? apricot cashew bites. yes. this is what olympic athletes will be eating. mm! that is quite good. it is good, you know. very healthy. superb. not quite the dessert i was expecting. i guess. i think everybody is getting used to the new normal, getting to ease with the fact that these olympics are now without spectators, so there is a drop in demand. however, everybody is still preparing for the groups that are coming, the people they have to look after and making sure the event is well executed. traditionally, every olympic games always now has a small army of local

volunteers who sign up to help ensure that visitors have the best experience possible. but with the ban on spectators and overseas tourists, many of the volunteers have either been stood down or seen their duties changed. where do we get the bus from? you are here now. mak san was looking forward to meeting travellers from all over the world, but now he is using his english to help out at the press centre instead. i wish the olympics would succeed without any problems. are you looking forward to seeing some athletes and some olympic events? yes. i love sports. i was a pe teacher. yeah. oh, great. so this is your dream job? yes. my dream job. of course, a modern olympic games is not just about sport. there is usually a whole host of marketing opportunities, corporate events and collectables associated with each games. daniel, tell me about these pins.

every national olympic committee likes to have their own pin. athletes, it gives them an opportunity to give them a gift from their country to somebody from another country that they may not necessarily interact with. this rwanda versus godzilla... what is? we have the rwanda team mascot against godzilla. it is an epic pin. that's great. this is a mega mecha. moving parts pin. wow, that is great. there is an entire network of collectors from all over the world. it is known as the unofficial olympic sport, collecting pins and trading pins. so, unfortunately, there are many collectors who would normally come to the games just to go pin trading and just to collect. it will be a little more difficult this time around

to get their hands on some of these prized possessions. it is estimated that back in 2019, over a quarter of a million fans from overseas travelled to japan to see the rugby world cup championship. staying, on average, for 16 nights and each spending around £4000, or $5500 us on their trip. arigato! so hopes were high that the postponed olympics would bring in even bigger numbers, more revenue and greater positive publicity for the country. i don't think there has ever been any event that had the demand that tokyo 2020 had. they really wanted to come and experience japan. the japanese hospitality, the food, the culture. it is only the fourth time in history that there has been a summer games held in asia, so i think itjust provided a unique catalyst for the entire world to go, "i want to be there." and, i guess, that is what makes it incredibly disappointing. it is only the fourth time in history that there has been a summer games held in asia, so i think itjust provided a unique catalyst for

the entire world to go, "i want to be there." and, i guess, that is what makes it incredibly disappointing. so no matter how you feel about the games, tokyo 2020 is happening at a unique and historic moment in time. and many people will want to capture that and reflect on it. the shops here are still full of memorabilia and souvenirs. how much will be sold, however, is unclear, given the lack of overseas tourists. one thing is clear, however. you can expect souvenirs to maybe become collectors' items in their own right. because they certainly represent a very different olympic games.

the edinburgh festival looks a bit different this year. but they are going ahead. the international festival has moved many of its performances outside and kicks off with a three day event in the royal botanic gardens. the fringe, meanwhile, mixes its socially distanced live in person shows with an online offering that starts on august six. new york is planning what some people are calling a mega—concert on the great lawn of central park. bruce springsteen, paul simon and jennifer hudson will headline the event, which is part of week—long celebration of the city's reopening. 60,000 people are expected to go, with different sections allocated to vaccinated and unvaccinated spectators. berlin's museum island has a new landmark, the humbolt forum. this vast building brings together the ethnological museum and the museum of asian art in one enormous reconstructed baroque palace. its remit is to be a symbol

of tolerance and diversity, but there has been controversy over its decision to house artefacts looted from parts of the world once colonised by europe. and barely a year goes by without dubai opening something enormous. this time it's the world's deepest pool. deep dive dubai goes downjust over 60 metres and holds enough water to fill six olympic—sized swimming pools. they have built an abandoned city at the bottom to explore, along with a library and an arcade. still to come on this week's travel show: the blast craters causing confusion in siberia... ..and with one final click of the castanets, a flamenco venue saying goodbye for the last time. so don't go away.

next this week, we are in russia on the remote siberian peninsula of yamal. scientists there have noticed enormous blast holes appearing on the landscape and it has had them scratching their heads. so we thought we would catch up with them to find out more. i first heard about these craters when i was contacted by a reporter in 2014. i came back to my e—mail and thought, "this is a crazy e—mail i got, this person "is talking about these craters." and i didn't have accessibility to the news, ijust didn't believe it. i got back to the us and i read a little more and wow, this is a thing that actually happened.

the fact that there could be a new geochemical process that we never imagined would happen, to have an exploding crater on land is just not something that, when i think about the processes that can happen on the earth, is not something that i imagined. how important are these? so this idea that what is the cause of these, is this something that is new that is happening,

is this related to climate, is this something that is a risk to people who are in the arctic, to the gas and oil infrastructure, which is quite close to the area where these craters have been occurring? and then is there some long—term impact on global climate? because there is methane that is coming out of these craters? it is an area where there is very thick layer of ice called tabular ice, and there is also an area where there is a lot of cryo—pegs, which is an area of ground that is within the frozen permafrost, so it is an unfrozen sandwich, it is surrounded by permafrost, it is unfrozen ground, and the idea of how these formed is that these very deep deposits of gas are sort of finding their way to this unfrozen pocket, this cryo—peg or italic, and then as pressure builds up eventually it raises the ground up, pressure builds up more and it explodes.

how many more of them are out there? what we're trying to do is use satellite data to view these craters. what we have first done is create a change detection map, which is an automated method of picking up pixels on the peninsula that have changed in some way. that algorithm was built based on sort of what we know about the craters. right? so once we have this change in texture map we have a team who are using high—resolution imagery to look through each one of these pixels and say, "does this look like a crater, does this look like something else?" and from there once we have something that we think looks like a crater or could have been a crater, we are getting timed series of very high—resolution imagery to try and figure out where these formed.

why are they happening now? it is really tricky to identify. i would not be surprised, and i do think it is likely that warming temperatures are at least in part contributing to making the ground unstable, allowing these explosions to happen. to me they are more an indicator of what is happening, and a very shocking indicator of what is happening in the arctic. and there is nowhere else on the planet that i know of where climate change is causing the physical structure of the ground to change. it is quite startling.

the unfolding mystery of siberia's enormous blast craters. right, to spain next. and an art form that so many of us see on our holidays. flamenco happens in venues called tablaos, which like so many venues have been forced to close, sometimes for good. we have met some dancers in madrid, who are now facing an uncertain future.

that's it for this week. coming up next time: christa is here with some of our favourite memories of new york city... ..from historical landmarks to hidden treasures... and the time she was made to face her public speaking demons once and for all. and i was like, oh! don't forget, you can catch up with our more recent adventures on the bbc iplayer and we are

on social media too. just search bbc travel and you won't be far off. but until next time, keep planning, stay safe and we will see you very soon. goodbye. hello. the forecast for the next few days is looking quite turbulent and at times very wet indeed, with some torrential, heavy, thundery downpours, albeit with some sunny spells in between. now, let's take a look at the recent satellite picture because you can see all of these areas of cloud just rotating around, circulating on top of the uk, and this pattern continues with low pressure firmly in charge. close to the centre of the low, particularly, we are going to see some really intense downpours and thunderstorms popping up during tuesday.

so, some cloud and some showery rain from the word go across western and southern parts, a bit more sunshine further east. but through the day, the showers will pop up quite widely, and some of them will be very heavy and thundery, especially across parts of north wales, the north midlands, northern england and scotland. and with very light winds, those showers will be very slow—moving, so in one or two places, we could see an awful lot of rain, giving rise to localised flash flooding. temperatures not doing too badly in the sunshine between the showers, as high as 23—24 degrees. some of those big showers and storms will rumble on through tuesday evening into the early hours of wednesday, and we start to see some more persistent rain developing across parts of scotland. so, low pressure still very much with us for the middle part of the week. in the centre of the low, an area of rainfall is going to become very slow—moving across scotland, so that could well cause some flooding issues. see, the rain will just continue here throughout the day.

for northern ireland, england and wales, it's sunshine and showers again, some of the showers heavy and thundery. some really squally, gusty winds, but the winds generally will be a bit stronger on wednesday. so, at least that means the showers, where they do turn up, should move through a little more quickly. temperatures will be lower on wednesday, though. quite cool for the time of year actually, 14—20 degrees. as we move out of wednesday into thursday, the rain across scotland will only slowly pivot and start to move southwards. so, before this rain finishes, some places across scotland could see 100 millimetres or more, hence the potential for flooding. some of that rain drifting southwards into northern ireland and northern england through the day. some sunshine further south, chance of one or two showers, but we could well see another area of wet and blustery weather pushing into the far south west later in the day. and temperature still a little disappointing, 17—21 degrees.

this is bbc news. i'm sarah mulkerrins — live in tokyo — day four of the olympics has got underway: a first ever gold for bermuda — as flora duffy is celebrating after wininng the women's triathlon. and the medals keep coming for team gb — they've picked up a gold and silver in the men's 200 metres freestyle. earlier — there was a first ever gold for bermuda — flora duffy winning the women's triathlon. i'm lewis vaughan jones in london. also in the programme: afg hanistan's descent into violence continues — with the un saying civilian deaths this year have increased by 50%. and pledging to unite a diverse country — canada's first indigenous governor—general is sworn