welcome to our viewers on pbs in america and around the globe. lawyers for the australian government have said that the continued presence of the serbian tennis player novak djokovic in the country could fuel opposition to coronavirus vaccines. the claim, made in an online court hearing, was dismissed by djokovic�*s lawyers as illogical and irrational. it followed the cancellation of his visa by the immigration minister. they're appealing to the federal court — and the matter will be heard on sunday morning local time. novak djokovic is still scheduled to play in the australian open in melbourne on monday. our correspondent, shaimaa khalil, is there. voice—over: this is nine news. voice—over: live from sydney, seven news. just moments ago, - the immigration minister has cancelled _ novak djokovic's visa. it's a story that made headlines here in australia and around the world. for days, novak djokovic has been on the court training, and now, the government has announced its decision. the tennis star's visa has been cancelled again and, for the second time, he faces deportation from australia. in his statement, the country's immigration minister, alex hawke, said today: the prime minister, scott morrison, said the sacrifices australians made throughout the pandemic should be protected. mr morrison's government has faced heavy criticism for allowing the unvaccinated player into australia in the first place while the country struggled with a spike in covid—i9 case numbers. i think it was a pretty mess—up that they did, but now i think they corrected the way. it's unfortunate, though, that novak won't be playing, you know, the tournament — it's a pretty big loss. yeah, i think if everyone else has to follow the rules, why can't he? and, obviously, he thought he was above it all. andy murray says the controversy has been bad for the sport. itjust seems like it's dragged on for quite a long time now and, yeah, not great for the tennis, not great for the australian open, not great for novak. his former coach, the multiple grand slam winner boris becker, said this story has become about more than just sport. he's only a tennis player. we're alljust sportsmen, we're not politicians. if we are used in a political way, then we don't have a chance. the world number one is still fighting to defend his title here. whether or not he'll be able to play, the australian open will take place under the shadow of a controversy that has gone way beyond tennis. shaimaa khalil in melbourne. phil mercer is also in melbourne for us and brought us up to speed with the latest in the court appeal. after he was detained at melbourne airport about 1.5 weeks ago, he was brought here to an immigration detention hotel quite close to the centre of melbourne. he may be brought back here, we don't know. what we do know is that there was a brief preliminary hearing in court today, essentially, it was a procedural matter dealing with administrative items ahead of a full appeal for novak djokovic against the decision by australia's immigration minister, alex hawke, to cancel his visa, and that will take place on sunday morning. so, today, if you like, to use a tennis term, is a bit of a warm—up for the main event tomorrow. 0k. but it's going to the wire and the open begins on monday. i mean, is there any chance at all he will play, even if he is allowed to stay, because he has missed out on so much training, hasn't he? well, he was training yesterday. we understand that he trained twice on one of the main arenas at the australian open venue, so we're not quite sure if he'll be allowed to train while this appeal is going on. he's due to play in the first round at melbourne park, which is only a short distance from here, on monday, so time is of the essence. we know that novak djokovic�*s lawyers have met the deadline, a midday deadline here, to submit their arguments against his cancellation of the visa to the court and the government has another ten hours to make their response. there was a false travel declaration, but it is accepted now that the exemption from the vaccine was valid? depends who you ask. that waiver — that medical waiver that novak djokovic said that he had and he believed would give him the right to come into this country without having a covid—i9 vaccination, now, that was granted by two bodies — tennis australia, which is the governing body, it's the organisation that runs the australian open, and also, the victoria state government. this is melbourne, melbourne is the state capital of victoria. so you have those two bodies, tennis australia and victoria, the state government, saying that he could have a medical exemption. however, when he got to the border, which is a federal jurisdiction, border force officials said he hadn't met immigration rules, so there is a bit of a disconnect there between tennis authorities, state authorities and federal authorities. it's a very murky world. and i think what this case really serves to highlight is the uncompromising and often complex nature of australia's immigration rules, especially during the pandemic. phil mercer with the latest on the novak djokovic appeal. a uk government minister has criticised borisjohnson�*s behaviour as unacceptable and said he must run downing street in a "very different way." guy opperman broke ranks after number 10 apologised to the queen for two lockdown parties held by staff on the eve of her husband's funeral. the prime minister didn't attend either party, but the latest disclosures have amplified calls for him to resign. separately, the former head of the government unit, which drew up covid rules, has said sorry for having leaving drinks while restrictions were in force. here's our political correspondent ben wright. it was a moment of national mourning. flags flying at half—mast in honour of prince philip, the duke of edinburgh. but inside number 10, on the evening of 16 april last year, two parties took place. there was drink and music at a time covid restrictions on indoor mixing in england were in place. restrictions the queen followed at the funeral of her husband the following day. when i heard about this, iwas, of course, very, very concerned, and i understand that people across the country are angry about what has happened. earlier this week, the prime minister did apologise for mistakes that have been made. according to the daily telegraph, downing street staff were sent to a nearby shop with a suitcase to buy more booze. number 10 has not denied any of this. borisjohnson himself was not there. itjoins the list of events being investigated by sue gray, a senior civil servant. as well as the two parties on the same night in april last year, back in december 2020, we know of several gatherings — both in downing street and government departments — including one on december 18, about which the prime minister said this... i have been repeatedly assured since these allegations emerged that there was no party and that no covid rules were broken. the list goes on with events in november 2020 being looked at. there was a gathering in the number 10 garden on may 15, 2020, and a bring—your—own—bottle event on the 20th, which borisjohnson has apologised for attending. today's chastened apology to the queen is the latest twist in a saga that has engulfed number 10. as new revelations have dripped out, downing street has appealed for patience, saying all the facts will be known when sue gray publishes her report. but many tory mps are livid about the prime minister's handling of all of this and the apparent culture inside number 10. even a government minister has said things must change. it's not acceptable behaviour. he's apologised — and quite right, too — and he needs to change his behaviour going forward, and we all, i think, agree that. a handful of backbench conservatives have written letters to the parliamentary party, asking for a confidence vote in borisjohnson. sutton coldfield is a true blue seat in the west midlands. but last night, the officers of its conservative association voted unanimously to withdraw its support from mrjohnson. the constituency�*s mp is a former cabinet minister. reporter: are you asking for his resignation? i'm not. i'm not normally a letter writer, but i'm waiting to see what sue gray reports. it is of immense concern, and i'm very conscious in the local community, in royal sutton coldfield, people are aghast at what's been going on. here and across the country, tory mps will be sounding out their local parties and voters. i think it's disgusting. they're like a rudderless ship, really. i think it's a vendetta - that the media have got. opposition parties are now calling on borisjohnson to quit. the prime minister allowed this to happen in number 10 not once, not twice, but on multiple occasions. the culture was it's one rule for everybody else and one rule for us. for a prime minister under intense pressure, much hangs on an inquiry that could lay bare whether those responsible for setting lockdown rules repeatedly broke them. ben wright at westminster. now, washington and kyiv have accused russia of preparing to carry out false sabotage operations to create a pretext for an invasion of ukraine. the pentagon said moscow had sent a group of trained operatives into eastern ukraine. they could then carry out acts of sabotage, against russia's own proxy forces there, which are concentrated in the donestk and luhansk regions. ukraine's defence ministry said russia was plotting to stage similar operations in the disputed moldovan region known as transnistria on the ukrainian border. there are quite a lot of russian troops on the ukrainian border there. the kremlin has denied the reports, but the pentagon says its intelligence showed the plans were well under way. we do have information that indicates that russia is already working actively to create a pretext for a pot...for a potential invasion. and, again, we've seen this kind of thing before out of russia. when there isn't an actual crisis to suit their needs, they'll make one up, and so, we're watching for that. ukraine has also accused russia of being behind a large scale cyber attack that hit numerous government websites. the nato secretary general, jens stoltenberg, has condemned the cyber attack. he said the alliance�*s experts had been in touch with their ukrainian counterparts on the issue. russia has also arrested members of the revil hacker group. revil were responsible for last year's hack, which disabled the us colonial pipeline. moscow said it was cracking down on the hackers at the request of the us. earlier, i spoke to john hultquist, vice president of the cyber security firm mandiant. i asked him how sophisticated the ukraine hack was. i think it's easy to overestimate this actual incident. you see it, this is an incident where a lot of different organisations were affected, the mod, the mfa, several other government organisations. their websites were defaced with these messages, but the important thing to remember is you can actually oftentimes access those websites through a single point of failure. this's probably what happened here. one system was accessed, and that allowed the attacker to essentially affect many systems at once. so these defacement are really superficial, and it didn't mean that the networks beneath these organisations were actually affected. that's interesting. so it's notjust the technology which isn't that unsophisticated. what about the things that they are trying to do to pretend that perhaps somebody else is behind this — how sophisticated is that? that's what's really interesting about this incident. even though it's not necessarily highly advanced, there does seem to be these little interesting details to the incident. for one, the attackers are sort of claiming to be polish nationalists. they made reference to this, like, historic disputes between poland and ukraine rather than disputes between ukraine and russia. there was also an interesting artefact in the picture files are used. there was a gps co—ordinate associated with poland, even though this was not a photograph, which is where you generally see gps co—ordinates. so, we have reason to believe that these things were planted on there, that somebody is trying to suggest that these are polish nationalists. we know that as a tactic that russia uses often. in fact, when they had targeted the olympics and olympic organisations, they pretended to be polish nationalists, and that was the russian military intelligence agency doing that. ok, so it's pretty clear in your view that this was gru sourced? it is a very real possibility, we don't have all the facts yet, but i suspect we will know more very soon. in terms of the arrests carried out by russia today, do we take that at face value, that this is some sign of cooperation between the us and russia, that are trying to do what biden asked putin a few months ago to do? it is hard to look at that incident, given the current context and not look at it cynically. it is absolutely a bargaining chip that russia can be using, this is a national security problem that russia has to get involved in, we need them to get involved in. so it is a bargaining chip at a time when they kind of, you know, they are in a situation where they are negotiating with the united states and other issues. who is the best country are doing this? i think the five eyes, the united states, canada, the united kingdom, australia and new zealand, typically when we do see that activity, it is very advanced. they also prize their operational security so we rarely see it. but very advanced countries do that because they have the most advanced economies. and that makes us vulnerable. we rely on technology every day, and that means attacks on technology can change our way of life, affect our of life. stay with us on bbc news. still to come: how a 24—year—old american who specialises in stunts has topped the annual list of the world's highest—paid youtube stars. day one of operation desert storm to force the iraqis out of kuwait has seen the most intense air attacks since the second world war. tobacco is america's oldest industry and it's one of its biggest, but the industry is nervous of this report. this may tend to make people want to stop smoking cigarettes. there is not a street that is unaffected. l huge parts of kobe - were simply demolished as buildings crashed into one another. i this woman said - she'd been given no help and no advice - by the authorities. she stood outside the ruins of her business. _ tens of thousands of black children in south africa have taken advantage of laws passed by the country's new multiracial government and enrolled at formerly white schools. tonight sees the 9,610th performance of her long—running play the mousetrap. when they heard of her death today, the management considered whether to cancel tonight's performance, but agatha christie would have been the last person to want such a thing. this is bbc world news. the latest headlines: the australian government's lawyers say the continued presence of novak djokovic in the country is undermining their covid vaccine strategy. as the tennis player's legal team try to stop his deportation. one of boris johnson's ministers one of borisjohnson�*s ministers because his behaviour unacceptable, after downing street apologises to the queen for number ten's staff lockdown parties on the eve of the duke of edinburgh's general. —— funeral. the office of the un high commissionerfor human rights says they are deeply concerned by recent incidents of hate speech and incitement to violence in serbia and the serb—controlled entity in bosnia. this comes on the back of recent fears over an escalation of tensions in the region largely fueled by the actions of the leader of the bosnian serbs, milorad dodik, recently placed under further us sanctions. the un said the authorities should promote reconciliation. these acts, which happened on religious holidays last weekend, included large groups of people chanting the name of convicted war criminal ratko mladic during tortured processions, orsinging processions, or singing nationalistic songs processions, orsinging nationalistic songs calling for the takeover of various locations in the former yugoslavia. in one incident, individuals fired shots into the air as they drove past a mosque stopping failure to prevent and sanction such acts, which feel a climate of extreme anxiety, fear and insecurity in some communities, is a major obstacle trust building and reconciliation. let's get some of the day's other news. the united nations says at least 108 civilians have been killed by airstrikes in northern ethiopia, in the past two weeks. the un human rights office said 75 others had been injured in strikes, allegedly carried out by the ethiopian air force. the federal government has previously denied attacking civilians in tigray. with much of argentina experiencing record high temperatures, firefighters are being despatched to wildfires in nine provinces amid fears that the heat and wind will spread the flames still further. temperatures in central and northern argentina have exceeded a0 degrees, with some areas registering 45 degrees on friday, the highest there since records began. the jailed former pharmaceutical executive, martin skrelli, has been banned from the sector for life and ordered to pay $61; million in damages to victims. a us federaljudge said the ban was warranted because mr skrelli had violated laws against monopolies. he is currently serving a seven year sentence for securities fraud. now to the philippines. people there are due to vote for a new president in may. the current frontrunner is �*bongbong' marcosjunior, the son of the country's late dictator, ferdinand marcos. marcos senior was exiled from the country in 1986 following a popular revolt against his corrupt and authoritarian rule. howard johnson reports from manila. i am today announcing my intention to run for the presidency of the philippines. bongbong marcos kicking off his election campaign late last year. running alongside him for vice president is sara duterte, daughter of popular authoritarian president rodrigo duterte. bongbong's father, president ferdinand marcos, ruled the philippines for two decades. his regime rigged elections, tortured and killed political opponents and plundered up to $10 billion of public money — corruption immortalised by wife imelda's extravagant shoe collection. in my four years as philippines correspondent, i've seen how social media has been exploited to revise dictator ferdinand marcos's corrupt and authoritarian rule to one of aspirational leadership. and it's been so widespread that many people up and down the country are now parroting the misinformation with absolute conviction. who will you vote for? of course, bongbong marcos. bongbong marcos, the son of ferdinand marcos, the former president? yes! and dictator of the country? excuse me? please correct the word dictator. translation: i would like to experience the good life that people were seeing when ferdinand marcos sr was still the president. we need to have that back. a man who knows about the marcos good life is american journalistjim laurie. he was in malacanang palace the day the family fled the country for exile in hawaii in 1986. you went into imelda's wardrobe room, and she had hundreds of designer gowns and designer dresses with the labels still on. and it was just a sense that, in a very, very poor country, it just somehow seemed obscene. more than three decades later, what laurie witnessed is repeatedly questioned online. they will say things like, "i don't believe this," "this must be doctored video from 1986," "it couldn't be true." and it does create a tremendous distortion of history and events. bongbong's biggest challenge comes from leni robredo, a politician that beat marcos jr to the vice presidency in 2016. we approached bongbong marcos for an interview and a right of reply, but they weren't granted. in may, filipinos will not only vote for their next president but also decide what version of history they believe in — the independent media reporting of the brutal martial law period or a sanitised social media version of it. howard johnson, bbc news, manila. a 24—year—old american who specialises in stunts, such as reading every word in the pocket oxford dictionary in one sitting, has topped the annual list of the world's highest—paid youtube stars. jimmy donaldson, who's known as mr beast, made almost $54 million last year and generated more than 10 billion views. here's our gaming reporter, steffan powell. we created every single set from squid game in real life... this might be the first time you've ever heard the name jimmy donaldson. on youtube, though, he's kind of a big deal. 30 people have gotten out... his highly produced elaborate stunts, like playing hide and seek in a sports stadium, or recreating netflix�*s show squid game, have earned him the top spot. his income is just above that of f1 champion lewis hamilton. while traditional media struggled during the pandemic, tv production were suspended and film releases delayed, youtube was booming. the top—ten highest paid creators on the platform earned a combined £219 million in 2021 — that's an increase of 40%. youtubers like jake paul haven't made the listjust because of their popularity. they've been the ones to cash in most effectively with brand partnerships, sponsorships and merchandise. despite this success, though, it's not all rosy, according to some. it was surprising to see how many white men were on the list. youtube is a really global environment, we know that it's hugely popular around the world and it seemed like we didn't see anybody outside of the english—speaking world there, and i think that is something that youtube really needs to work on in the future, to make sure that people outside of these countries are compensated fairly for their work. there's still space for ten—year—old toy reviewer ryan kaji. the number one from 2019 and 2020 has, though, slipped to seventh place on the list, having earned a paltry £20 million. steffan powell, bbc news. hello there. another cold night, certainly, for england and wales. widespread frost and also some mist and fog reforming. some of it will be quite dense in places to start this morning. but most of the country this weekend will be dry and settled. there will be some showers around, though, as a weak front spreads its way across the uk. here it is out west in the atlantic for saturday. but you can see it's higher pressure towards the south and the east of the country. lightish winds again through the morning. so that means we will start off rather cloudy, misty, murky. some fog around too. most of that fog lifting into low cloud through the day, so quite a bit of grey weather, i think, around. but there will be some sunshine around, the best of it in northern england, into northern and eastern scotland, northern ireland as well into the afternoon, perhaps south—west england too. temperatures, 5—9 degrees for most of us. more of a breeze coming up from the south—west, so that means the air quality should be a bit better for london and the south—east. now, as we head through saturday night, most places will be dry, bar the odd shower around. further north, we've got that weather front spreading down from the north. that'll bring a band of cloud and rain, some blustery showers following in behind there. and temperatures, 1—4 degrees across the board, so not quite as cold as what we've had the last few nights. as we head on into sunday, we've got that weak cold front spreading southwards across england and wales. there will be barely anything on it, so a band of cloud, just some spots of rain slowly pushing southwards. behind it, skies will brighten up, but it will be a breezy day right across the board. there are more isobars on the pressure chart. even windy across the north of scotland, with gales in the northern isles. temperature—wise, pretty much where we should be looking at this time of year, ranging from around 7—9 degrees. we could see 10 or 11 degrees across southern england and south wales. now, as we move out of sunday into monday, that weather front clears away and then high pressure builds back in it once again. that'll settle things down, notjust for monday, for the rest of the week. so it could be quite a chilly start again for monday. light winds for most, apart from northern and western scotland. there will be a bit more cloud here, a bit more of a breeze. and temperatures — again, around the seasonal average — range from around 6—9 celsius. now, apart from a few weather fronts across the north of the uk as we move through this new week — this is bbc news, the headlines: the australian government is arguing that novak djokovic's continued presence in the country is undermining their covid vaccine strategy. lawyers for the world number one tennis player are contesting the cancellation of his visa, for the second time. the matter will be heard on sunday morning. one of borisjohnson�*s ministers has called his behaviour unacceptable, after downing street apologised to the queen for number 10 staff lockdown parties on the eve of prince philip's funeral. the prime minister didn't attend either party but the latest disclosures have amplified calls for him to resign. washington and kyiv have accused russia of preparing to carry out "false sabotage operations" to create a pretext for an invasion of ukraine. the kremlin has denied the reports, now on bbc news we look at the hidden world