Following the worst violence in the city for decades. A Photo Exhibition by the wife of one of chinas most famous dissidents, gives a rare insight into her life. Live from our studios in singapore and london, this is bbc world news. Its newsday. Good morning. Its 7am in singapore, midnight in london and 3am in the gulf of oman, where two oil tankers were hit by explosions on thursday. The us secretary of state mike pompeo has accused iran of carrying out the attacks. A Us Navy Destroyer is now heading to the scene. Tehran has denied having anything to do with the incidents. Heres our chief International Correspondent lyse doucet. This morning in the gulf, a First Oil Tanker set ablaze, ignited by an explosion. Crew members on this norwegian vessel were rescued by a passing cargo ship. These scenes filmed by irans navy. An hour later, another tanker, japanese owned, also hit by an explosion. Its still not clear what caused these latest attacks in one of the worlds busiest shipping lanes. Today in washington, unequivocal condemnation of iran. These unprovoked attacks present a clear threat to International Peace and security, a blatant assault on the freedom of navigation and an unacceptable campaign of escalating tension by iran. The attacks took place close to the strategic strait of hormuz, vital to world trade, where tensions have been mounting for months between regional rivals. On one side there are arab states including key us allies in the gulf. On the other side is iran. At its narrowest point, the strait of hormuz is just 21 miles wide, and there are two lanes for tankers to pass in opposite directions. A fifth of the worlds oil exports, almost 19 Million Barrels a day, passes through. So attacks on tankers can threaten oil supplies, drive up prices and fuel the tensions many worry could tumble towards war. This was meant to be a week of diplomacy. Japans Prime Minister, shinzo abe, is in tehran, hoping to help ease tensions, only to see them escalate. Today he met irans top leader, ayatollah khamenei. Iran calls the timing of these attacks are suspicious, and reject any responsibility. Iran is also blamed for this. An attack yesterday on an airport in saudi arabia, 26 injured. Yemens houthi rebels, aligned to iran, say this was their work. Two weeks ago, king salman called arab and Muslim Leaders to mecca, islams holiest site, urging them to condemn iran. Saudi officials told me then they dont want a war, but some sources spoke of a proportionate response. So whats next . Last month the us moved an Aircraft Carrier and bombers to the gulf. President trump says he wants to talk to iran. They wont, not while he imposes crippling economic sanctions. Everyone says they dont want a war, but everyone is on edge. Lyse doucet, bbc news. Lets take a look at some of the days other news. Us President Donald Trump has announced that White House Press secretary Sarah Sanders will be leaving her post at the end of this month. Just hours earlier a government watchdog said another white house aide Kellyanne Conway should be fired. Our correspondent in washington, chris buckler, has more details about mrs sanders departure. Sarah sanders has been the face of the white house at times and the voice of the president. And sometimes that can be a difficult role, given that President Trump can be more vocal and outspoken than many of his predecessors and there have been times when youve seen at the podium during those White House Press briefings, they were once more common than they are now, standing there and struggling with what she needed to say, like that time there was the family separation policy for immigrants coming to the border and pa rents immigrants coming to the border and parents being separated from their children. She did struggle with that at times and during the mueller report, see said she had lied at one time when fbi agents supported the president in his action removing the fbi directorjames kony but she says she is leaving to pursue other roles outside of the white house to spend some time with her own children and actually the president has been very supportive of her commerce describing her as a warrior. While she is going, someone elses staying despite being controversial. Kelly and conway, another spokesperson for the white house and advise of the president has been found to breach the hatch act act, the office of the special council, however the obvious of the president is dismissing that, despite the fact that she has been pa rt despite the fact that she has been part of artisan accusations. Also making news today. The suspected white supremacist, brenton tarrant, has pleaded not guilty to all charges related to a mass shooting at two mosques in christchurch, new zealand. 51 people were killed and dozens more wounded in the march attack. Tarrant is facing 51 counts of murder, a0 of attempted murder and engaging in a terrorist act. Cyclone vayu has changed course, sparing indias Western State of gujarat. Authorities said the region would remain on high alert as strong winds and heavy rain lashed coastal areas. Hundreds of thousands of people have been evacuated from the area as a precaution. Tourism officials in nepal say post mortems, carried out on climbers killed this year on mount everest, suggest their deaths were not the result of over crowding on the mountain. Instead, they died of altitude sickness, physical weakness or exposure to severe weather. As many as eleven climbers are thought to have died on everest this year. The former British Foreign secretary, borisjohnson, has taken a commanding early lead in the contest to become the uks next Prime Minister. In the first round of voting by conservative mps to choose the partys new leader, mrjohnson received more than a hundred votes. Further votes next week will whittle the field down to two candidates. An ancient tower in the afghan city of ghazni has collapsed, raising questions over the governments ability to protect the countrys artefacts. Footage from social media shows a fort in the old city crumbling. The tower was one of dozens already destroyed in the city. Officials blamed heavy rain, but some critics accuse the government of negligence. Ghaznis islamic and pre islamic architecture is widely admired although war has taken its toll. Lets turn now to hong kong, where after days of protests a pause, in the fight over the proposed extradition bill. As of thursday evening, 81 people have been injured and 11 others arrested. But what next for the extradition bill . The president of hong kongs Legislative Council, Andrew Leung Kwan yuen, had said that he wanted the extradition bill to be passed by 20th june. But with the debates postponed, that is looking very unlikely. Legislators are also due to begin their summer recess around mid july. If the bill isnt passed by then, it will have to be brought up again after the recess, giving protesters the entire summer to organise further opposition against it. So for now a waiting game. Lets turn now to our correspondent Sharanjit Leyl whos in hong kong. There has been a lull in the protests 7 there has been a lull in the protests . Yes, because its two days after those protests and use all the footage of the violence, the pitched battles between protesters and police that took place two days ago. It isa police that took place two days ago. It is a day later from the same spot we we re it is a day later from the same spot we were out yesterday, i should add, and yesterday, what a difference a day has made because yesterday, there were piles of rubbish in the streets, simply thrown all over the place and a day later, its all been cleaned up. The traffic is flowing again. People very much going back to their regular lives this friday morning here in hong kong but if you ta ke morning here in hong kong but if you take a look really closely, there is still some evidence of the kind of violence we saw, the thousands of protesters who have filled these streets on wednesday. You can see this, barriers being forced from the side of the road, the physical number of people here trying to blockade these roads to prevent lawmakers from debating that controversial extradition bill in the Legislative Council complex behind me. What we know of course is that some government buildings remain closed, including the complex there and there are still signs of Police Presence around, we are seeing police wandering around but as you say, a lull in the protest and people still very much going about their regular day again back to work. Are more protests being planned . Yes, in fact, i should say on sunday, there will be plans amongst organisers saying to bring together more protesters. Sunday is crucial, it will be a week since, last week on sunday, where we saw a million people, organisers said, gathering here in the streets, showing their displeasure. The mood here of course very much in shock in hong kong. Its the worst violence people had seen for decades. Rubber bullets being fired. Teargas as well. A number of arrests have been made. Even the territorys leader carrie lam has described it as organised rights. The sense of whats been happening over the last week, what theyve seen in terms of television footage, what theyve participated in themselves, emotions are going to be running high because there is still a lot of anger, a lot of rage. We were talking to a group of rage. We were talking to a group of students, volunteer medics, who had come up here to try and help potentially any more people getting injured. They are still here two days later. Theyve got to stand essentially and they say they sense real disappointment, rage and frustration at their government. There is no sign the Hong Kong Government is backing down on this controversial extradition bill. But for now, life is but a normal. Youre watching newsday on the bbc. Still to come on the programme the wife of chinas most famous dissident spent years under house arrest now an exhibition of her photos show how she suffered. Also on the programme some of the oldest trees in the world are dying. Researchers are trying to understand why. The day the british liberated the falklands. And by tonight, british troops had begun the task of disarming the enemy. In the heart of the west german capital, this was gorby mania at its height. The crowd packed to see the man who for them, has raised great hopes for an end to the division of europe. Michaeljackson was not guilty on all charges. The screams of the crowd, a testament to his popularity and their faith in his innocence. As long as theyll pay to go see me, ill get out there and kick em down the hill. What does it feel like to be the first man to go across the channel by your own power . It feels pretty neat. Feels marvellous, really. This is newsday on the bbc. Im rico hizon in singapore. Im Samantha Simmonds in london. Our top stories iran denies it but the United States blames tehran for the attacks on two oil tankers. One of Donald Trumps closest allies is leaving the white house, and another is staying put despite advice that she should be fired. Lets take a look at some front pages from around the world. The Hong Kong BasedSouth China Morning Post is focusing on this weeks demonstrations against the extradition bill. Its front page features comments from the citys commissioner of police, who outlines the extent of the violence and the lengths his officers went to in order to control it. The london based Financial Times is looking at the impact of the tanker attacks on the markets. As this graph shows, the incidents pushed the price of brent oil up by as much as 4. 5 . And the japan times is looking at the meeting in tehran between japanese Prime Minister shinzo abe and iranian president hassan rouhani. Abe is the first leader of his country to visit iran in 41 years. Those other papers. Are the papers. Now, what stories are sparking discussions online . Yes, lets look at what is trending right now. President donald trump has caused a splash on twitter after he tweeted to say he had met the prince of whales, misspelling the countrys name as the mammal. Mrtrump was intending to refer to prince charles, and subsequently deleted the tweet, before correcting his mistake. Lets return to our main story the explosions on two oil tankers in the gulf of oman. Geneive abdo is a resident scholar at the Arabia Foundation where she specializes in iranian geopolitics. The us secretary came out very quickly, he is very confident that eran is behind the attack on the two tankers. He seemed to have evidence. I tankers. He seemed to have evidence. , what is your analysis . Tankers. He seemed to have evidence. ,what is your analysis . Iran. Lets not forget they have been several attacks now that are not necessarily aimed at the United States directly but are basically leave to be initiated by iran or its p rox i es leave to be initiated by iran or its proxies proxies. The trumpet ministration does not want to go to warand trump has ministration does not want to go to war and trump has said this very specifically, at the same time, they cannot allow these attacks to happen. Iran has been very insistent it was not behind the attack, who might have reason to provoke or instigate to try and cause conflict between the two countries . instigate to try and cause conflict between the two countries . I do think there isnt absolute evidence at this point but we can assume the most likely suspect which is probably higher than elements inside iran or those operating outside that wa nt to iran or those operating outside that want to make sure that there are not negotiations that are renewed between the United States and iran. It is not a coincidence that the japanese Prime Minister was in iran when it happened, he came there on the behest of President Trump. To try to upstart these negotiations again. Something that the higher than elements inside and outside do not want to happen. They dont want the negotiations to continue, they wa nt the negotiations to continue, they want the situation to escalate. The negotiations to continue, they want the situation to escalatem it is proved that iran or possibly the hardliners or government authorisation was behind this attack, what happens next . Well, i think that the United States will try to apply more pressure if that is possible without any sort of military confrontation and it is important to note that secretaries state m e nts important to note that secretaries statements today did not focus on a military confrontation, thats not something the United States wants. Its highly unlikely that the United States would ever initiate direct confrontation with iran, country to country, but i do think there is a military plan in place and if, for example, us civilians are injured or us interests are targeted and destroyed, then we are a different ball game. So that is the game changer. I think that the United States will continue its pressure, it is clear that there are elements that are trying to sabotage any initiative for negotiations again, that might include broader issues. That are outside the nuclear deal, this is something that the conservatives inside iran do not wa nt to conservatives inside iran do not want to happen. I think that we will see an escalation of the conflict continue but unless us interest are specifically targeted, i dont anticipate that the United States will initiate any sort of military confrontation. 10 years ago researchers in california launched a long term project to track the life histories of some of the worlds oldest trees. They wanted to find out why some of the giant species in Yosemite National park are dying out. The first decade of this ambitious plan has already seen dramatic changes in the forst, with wildfires and dought taking their toll. Peter bowes reports from yosemite. This is Yosemite National park, a vast expanse of forest land and some really breathtaking views. When i came here ten years ago i met with a group of scientists just embarking on a long term project to track the life histories of these trees, some of the oldest and tallest in the world. We have understood from Previous Research that the number of large diameter trees is less than it used to be. What we would like to do is investigate why that is. Ive come back to see how things have changed. Its right down there, isnt it . Just a kilometre away are the 35,000 trees. Shall we go have a look . Lets do it. Lets go. The tree right over there is the same tree that we filmed. So, here we can see the tag. The same tag, it was fresh ten years ago and we can see the discolouration by the heat of the fire. The park embraces science and the role of fire to manage the forest year round. Five years into the project, in 2013, we experienced a fire. A backfire that the National Park service lit to check the advance of the rim fire, at the time the largest fire in the Sierra Nevada of california. Today my role is to remeasure all of the trees that are alive, to compare it to the measurements we took after the fire. 0. 24 metres. The year after the fire, my first year here, a lot of the trees died, especiall