welcome to bbc news, broadcasting to viewers in north america and around the globe. my name is mike embley. our top stories: german police clash with protesters well into the night, hours before the start of the 6—20 summit in hamburg. as he arrives in europe, president trump calls on the west to defend itself against the threat of islamist terrorism. america and europe have suffered one terror attack after another. we are going to get it to stop. at least 28 inmates are killed in a gang fight at a prison in acapulco. and 20 years in the making, the joint european—japanese venture to the hottest planet in our solar system. hello.

riot police and protestors have clashed in germany, as world leaders gather for the 620 summit of leading economies. before the summit, president trump spoke in dramatic terms of the need to defend western civilisation, which he defined in terms of religion, rather than democracy. he spoke of a range of threats, including islamist terrorism. in a moment we'll hear from the protestor from across europe, angry because they feel leaders are failing to solve many issues threatening world peace. first, from hamburg, jon sopel. the famous port of hamburg, tonight a disembarkation point for anarchists, anti—capitalists, anti—globalisation protesters, and the leaders of the world's 20 richest nations. protesters‘ stones and fireworks were met by police teargas and water cannon. no such hostility when the president ventured out in warsaw this morning. chanting.

not everywhere in europe would they chant donald trump's name so loudly or so approvingly. but with its populist anti—immigration government, this was politically the ideal place to come. and by dint of poland's history and geography, the perfect location too to deliver a message about the challenges facing the west. the fundamental question of our time is whether the west has the will to survive. do we have the confidence in our values to defend them at any cost? do we have enough respect for our citizens to protect our borders? do we have the desire and the courage to preserve our civilisation in the face of those who would subvert and destroy it? in the 1940s, the threat was nazism. this sculpture commemorating those who died in the warsaw uprising, the backdrop on which the president delivered his speech.

today he identified the threat as islamist extremism, but he had another target in his sights too. we urge russia to cease its destabilising activities in ukraine and elsewhere, and its support for hostile regimes, including syria and iran, and to instead join the community of responsible nations in ourfight against common enemies and in defence of civilisation itself. that's the most outspoken he has been about russia and it comes on the eve of his eagerly anticipated first meeting with vladimir putin. but on moscow's interference in last november's us presidential election, something his intelligence services say is fact, the president again equivocated. it could very well have been russia, but it could have been other countries and i won't be specific. but i think a lot of people interfere.

it's been happening for a long—time, for many years. then it was onto germany and what promises to be at testing summit, with disagreements over trade, immigration and climate change. the world's leaders aren't exactly welcome in hamburg. there are tens of thousands of protesters in the city, they dance to many different tunes but they are united in their resistance to this summit. then, after a peaceful afternoon, police moved into disperse them. within minutes, stalemate. this is now stand—off for a half an hour or so. the police in riot gear, water canon at the ready have been waiting here, holding back the demonstrators, who say they are not going anywhere. hard to say who provoked

whom but this is exactly what police feared. they say 8,000 extremists are targeting the summit, many of them armed with improvised weapons. the demonstration maybe over for now, the protests are not. we are shocked how the police is treating all the people and we saw how scared the people are. they are just doing theirjob but maybe a little sometimes too hard! this evening this city is uneasy, after all, the summit hasn't even yet begun. jenny hill, bbc news, hamburg. well, those clashes between riot police and protesters have continued into the night in hamburg. police have used water

cannon and pepper spray; masked protesters clad in black threw bottles and stones, and started several fires. hamburg police say more than seventy officers have been injured. the main protest march — titled "welcome to hell" — was called off when clashes broke out on thursday evening. security cordons have been put up to stop protesters reaching the summit venues. i've been speaking tojohn blaxland, professor in intelligence studies and international security, at the australian national university. he told me how he thought donald trump's political style will go down at the g20. a thing about the trump administration is that there is a degree of dysfunction. we hear trump speaking in a very belligerent manner, and then we hear secretary of defence mattis trying to rein it in. so there is a real conflicting message in there because trump knows that, really, the rhetoric is not going to get him very much but he's trying to play the art of the deal. whereas mattis knows that, in practise, there are very few viable options for the united states other than a massive escalation,

which is in no—one‘s interests. there are options there — additional pressure when it comes to sanctions but that requires co—operation from china and the rhetoric that the trump administration has been using with china has been mixed and so the meeting that president trump will have with president xi is going to be a very significant one, potentially. but of course, that is in the mix of a whole spectrum of other issues, because the protesting outside of the g20 summit is actually perhaps symptomatic of a tussle that is going to be happening inside of the summit itself. the issues, the spectrum of issues we're talking about here — we're talking about security, we're talking about trade, we're talking about climate. all of these things... ..and refugees. these are things with which the united states under trump is not in agreement with europe on many of those issues, he's not in agreement with china or russia. so when we think about this in terms of the climate — that is clearly a point of contention. trump is not a believer, it appears, in that. so that's a point of concern.

0n trade, we have the us that has been the leader of the world trade organization, it has been historically front runner on trade liberalisation, now acting more protectionist. and we're seeing europe and japan coming up with a trade agreement that is actually almost shaming the united states by comparison. and there are clear ramifications for the united states trade wise. but i think the most significant domain of concern is on the security front. we touched on it and it is notjust north korea. north korea is certainly a big one. what happens with syria? will the talk that secretary tillerson has made about some kind of deal with russia come about? the rhetoric from president trump would suggest that it is not all that likely. there has been quite a chasm development between russia and the united states. what we heard him say in poland

would indicate that he is not feeling very warm towards russia at the moment, partly, i think, because of domestic reasons in the united states. so there are really conflicted messages there that are problematic for the g20 summit. here's hoping though, that something constructive will come out of this, given the leadership we are seeing out of europe, particularly from angela merkel, and from macron in france. and it will be interesting to see how much xi, president xi jinping, from china, can influence things in a positive way as well. let's take a look at some of the other stories making the news: the world health organization has issued a stark warning that the sexually transmitted infection, gonorrhoea, is rapidly developing resistance to antibiotics. in a study of 77 countries, the who found cases injapan, france and spain where the infection was completely untreatable. british counter terrorism police say they believe salman abedi, who carried out the suicide attack in manchester in may, was not part of a larger

extremist network. but officers say other people might have been aware of what he was planning, and they want to question his younger brother, who is in custody in libya. authorities in mexico say at least 28 inmates have been killed in a prison riot in the coastal city of acapulco. three other people were wounded. security officials said the fight was between rival gangs. it's the latest example of an upsurge in violence that has made 2017 one of the bloodiest in mexico's recent history. greg dawson reports. as police prepared to enter the prison with protective clothing and riot shields, it provided a small clue as to the level of violence happening inside. it was in the early hours of thursday morning when some inmates on the maximum security wing broke out of their cells and began fighting. victims were stabbed and beaten to death. local reports claim some of the dead were decapitated. bodies were strewn around the kitchen, the prison yard, and the conjugal visits area.

this most brutal attack in one of mexico's most violent cities. las cruces prison is supposed to be heavily overpopulated, with over 2000 inmates. as relatives of the inmates got word of what was happening, some tore down the security fence to try and reach loved ones. a spokesman said the fighting was triggered by a permanent feud between rival gangs within the prison. acapulco used to be one of mexico's most popular beach resorts. but tourism has given way to vicious gang warfare, and it is now ranked one of the most murderous cities in the world. the timing of the riots has been particularly embarrassing for the mexican government, who are hosting the us department of homeland security secretary, john kelly, the same day. the trump administration has a ready made its concerns about violence security in mexico clear. this is likely to only add fuel to that debate. greg dawson, bbc news.

it's a project that's been two decades in the planning and a journey that will take 7 years to complete but european and japanese scientists say their mission to mercury will finally leave the launch pad next year. two spacecraft will travel the nearly 80 million kilometres together, but then separate on arrival to conduct their own studies in temperatures above 400 degrees c. here's our science correspondent rebecca morelle. a mysterious world, mercury is the smallest planet in our solar system, and the closest to the sun. covered in craters, towering cliffs and ancient volcanoes, until now, it has been little explored. a major new mission is set to change that. this is the spacecraft called bepicolombo, named after a famous italian scientist. it has taken nearly a decade to build. it is only when you get up close that you really get a sense of the size of this huge piece of kit.

and this is a spacecraft built to withstand extremes. to get to mercury, it has to travel towards the sun, and that means dealing with intense radiation and heat. 0n the surface of mercury, temperatures can reach a50 celsius, and that's hot enough to melt lead. its launch will take place next year. this is probably one of the most challenging missions we have ever undertaken. it's the long journey to get there and then we have to deal with heat when we get close to the the sun. but mercury is a tiny, enigmatic little world, which has so much to tell us about the formation of our solar system. bepicolombo‘s journey will take seven years, arriving at mercury in 2025. once it's there, the engine will be jettisoned, and two spacecraft will separate. they will work together to give us our best ever view. we'll see its features in incredible detail, and peer inside to solve the mystery of what lies at mercury's core. this is the instrument we built at the university of leicester...

british scientists have developed x—ray cameras for this mission. we're going to be the first people on the planet to see this data coming back from mercury. we'll be the first people to see x—ray images of mercury's surface, which is going to tell us about what the surface is made of, and it's going to revolutionise our understanding. the spacecraft will soon be packed up, ready for its long journey. and while it will be sometime before we get the first results back, scientists say the wait will be worth it. rebecca morelle, bbc news, the netherlands. stay with us on bbc news, still to come: living the high life — the restaurant in los angeles that's recreating the experience of aviation‘s golden age. central london has been rocked by a series of terrorist attacks. police say there have been many casualties, and there is growing speculation that al-qaeda was responsible. germany we will be the hosts

of the 2006 football world cup. they pipped the favourite south africa by a single vote. in south africa, the possibility of losing hadn't even been contemplated. celebration parties planned in all the big cities were cancelled. the man entered the palace through a downstairs window and made his way to the queen's private bedroom. then he asked her for a cigarette, and on the pretext of arranging for some to be brought, she summoned a footman on duty, who took the man away. one child, one teacher, one book and one pen can change the world. education is the only solution. this is bbc news.

the latest headlines: police in germany have clashed with protestors as world leaders gather in hamburg ahead of the g20 summit. as he arrived in europe, president trump called on the west to defend itself against the threat of islamist terrorism. let's stay with the g20, and a warning from the former prime minister of australia who helped shape the summit into the gathering it is today. kevin rudd told the bbc the world is entering a dangerous phase. i think there are two levels of risk. one is the geopolitical risk level. we've seen what's unfolding on the korean peninsula, with the new environment, with the testing for the first time ofan icbm. in us—russia relations there is now an increasing incidence of russian and us military aircraft having near misses or near incidents, either in the baltic or across the middle east. and then thirdly uncertain trajectories now again from a different source of tension in the middle east.

finally, geoeconomics. we now have the deep pressures which now exist on the future of free trade and if we end up in a trade war through tariff action and counter tariff action, that's bad news for growth and bad news forjobs. kevin rudd there. the american and russian presidents will hold their first face—to—face talks on the sidelines of the summit. mr trump has said he wants to find ways to work with vladimir putin, but what do russians more generally think of him? well, less, it seems, than when he took office six months ago. 0ne cossack community in st petersburg who made him an honorary member has since withdrawn that status. steve rosenberg reports. are you disappointed in donald trump?

yes. when donald trump became president, there were great expectations in russia. are you disappointed in donald trump? yes. i understand he is on top position. because everytime he says something or hear something, he to improve relations with russia, and he is accused of being a russian stooge. china's only aircraft carrier has arrived in hong kong in what many see as a show of force to its rivals in the contested south china sea. the soviet—made liaoning and its three accompanying ships entered hong kong waters from the south. the carrier will stay for two days. earlier this week, 2,000 hongkongers queued for hours for tickets to board and visit. france's environment minister,

nicolas hulot, has christened the first ever boat to be powered solely by renewable energy and hydrogen. the ‘energy 0bserver‘ is covered in solar panels and has two wind turbines on either side of the cabin to power it. when there is no sun or wind the boat will use hydrogen as a fuel. the crew is now planning a 50 country tour to raise awareness of the project. it's one of the world's most enduring aviation mysteries, the disappearance of the american pilot and pioneer amelia earhart. now, some are suggesting an old photograph may shed new light on the mystery, opening up the faint possibility that amelia earhart ended up on the marshall islands, then occupied by the japanese, and died as a prisoner. some claim this picture, believed to be taken in the 1930s, shows the pilot and her navigator fred noonan sitting on a wharf in jaluit atoll, after they went missing. but some experts dispute the claims. one of those, very definitely, is ric gillespie, founder of the international group

for historic aircraft recovery. i spoke to him from pennsylvania. i think it's incredible that something this silly has gotten as much attention as it has. it is always dangerous to hype a new allegation like this days before your television special and give people time to come forward with the information that completely debunks it and that's what's happening. it is a tribute to her i suppose that people care so much, isn't it? that's exactly what it is. fill us in on that, why is she so significant to so many people? she was such an inspiration when she was alive. she was so famous. didn't hurt to be married to one the finest promoters since pt barnum.

she really was a great personality and an inspiration. and she died at the height of her fame in a very mysterious manner. and then there were different theories about what happened to her and the controversy about that keeps her legend alive. and over the years it has become this iconic mystery. it is an addictive detective story, trying to figure out what really happened to her. and so a lot of people are really invested in various theories and there are still people, although it has been debunked for years that she was captured by the japanese. and here we go again, probably because we live in an age of conspiracy theories. so ric, in a nutshell, or in a couple of nutshells, what is wrong with that picture? well, first of all, if this is amelia earhart, captured and in custody of the japanese, where are the japanese? there are no soldiers

in this picture! this is a picture of a bunch of people standing on the dock. it is an office of naval intelligence photo taken atjaluit atoll, the headquarters of the japanese in the marshalls, so they were curiouser about it. and the label on the photograph says that is where it is. it doesn't say anything about amelia earhart. nobody is acting like they are guarding everybody. everybody is just hanging out on the dock. the person that they claim is amelia earhart has her back to the camera, you can't see her face. if she is a woman. we know she has a lot more hair than amelia earhart had at that time she disappeared. we've got lots of good photos of her at the time. the guy they say is fred noonan, oh, absolutely — doesn't look like anything like fred noonan. for a lot of people air travel can be a bit of a chore. delays, queues, cramped conditions

and food that often leaves a great deal to be desired. but once upon a time it was very different. now a restaurant in los angeles is trying to recreate that golden age, as the bbc‘s tim allman reports. ah, those were the days, luxury at 40,000 feet. smiling stewardesses, businessmen in suit and tie, a different age. which you can now relive the pan am experience in la — a restaurant designed to look like an airline. i actually had a lot of vintage menus from my days travelling pan am, so i picked my favourite one and i went to a caterer and got them to replicate the eact detail. that includes chateaubriand, carved at your table, chicken and peppercorn sauce, oh, and a vegetarian option — this is 2017, after all. and the chance to buy duty—free. it is the most brilliant experience, it really is.

people of my age — old — we lived this, you know, we went through this. and it's gone. the airlines don't do what they used to do, pan am was the best and they always created the very best service. to operate the exit doors, simply push the door open. laughter. mile—high entertainment, so to speak, at ground level. but it isn't cheap. their first—class tickets will set you back nearly $700. and, when you get out, you haven't travelled an inch. you can get that and more of the news anytime on the bbc news website. that's it. thanks for watching. it was a very warm day on thursday

across england and wales, in particular southern and south—eastern areas, with a top temperature in london of 32 celsius. in fact, a number of stations in the greater london area saw 32 degrees and it was pretty hot as well further north, but the heat across northern england broke down in spectacular style with some severe thunderstorms, we had reports of flash flooding and also some lightning damage across yorkshire and into lincolnshire. now, those thunderstorms will continue to rattle away off into the north sea, and then for most places it should be a dry end to the night. thicker cloud and outbreaks of rain, though, pushing into northern ireland and western scotland, it's going to be a very warm and muggy start to the day once again across the south, particularly the south—east. only a little bit of cloud around for the south—west of england, into western wales, but a good deal sunshine for the midlands eastwards and look at those temperatures to start the day, around 20 degrees. further north and there will be thicker cloud. for north—west england into scotland and northern ireland, like i mentioned, there will be some

light and patchy rain around so a dismal morning with temperatures here at 8am around the mid—teens celsius. through the day it looks like that cloud across western areas will tend to move in eastwards and any clear skies tending to infill from cloud, so a cloudier afternoon that what we saw on thursday, so that means not quite as hot. still very warm, though, in the south—east with 27 or 28 degrees. a rather low 20 further north and high—teens celsius in scotland and northern ireland. it means for the tennis at wimbledon on friday that it will be a bit more comfortable for the spectators and for the players with highs around 26 or 27 celsius and sunshine coming and going. a fine end to the day on friday, but we look to the west to this area of rain, which will push in towards wales, light and patchy and will affect mainly western areas. this weather front is responsible for it. as we head on in towards saturday it will bring a cloudy, damp day to central areas, northern ireland, through northern wales and into northern england, the rain not amounting to that much. to the north of it, largely dry with sunshine and there will be

sunshine across southern areas, but generally speaking a cloudy day and a cooler one across the board. top temperatures 2a degrees. looks like temperatures rise a bit again as we head on towards sunday and that's because we pick up some thundery air again off the near continent, this area of low pressure could introduce some heavy showers to southern parts of the country, maybe the odd thunderstorm, and this weather front brings outbreaks of rain to scotland and northern ireland. but in between a slice of drier and brighter weather and again quite warm in the south—east. this is bbc news. the headlines: german riot police and demonstrators have clashed in the city of hamburg, on the eve of the g20 summit.

police have used water cannon and pepper spray as masked protesters clad in black threw bottles and stones and started several fires. at least 70 officers were injured. it's not clear how many protesters. in a speech on his arrival in europe, the us president donald trump called on western civilisation to stand united against what he called the "menace" of radical islamist extremism. trade, climate change, and north korea are also expected to dominate the agenda at the summit. mexican authorities say 28 inmates have been killed in a fight in a prison in the coastal city of acapulco. three more were wounded. security officials in guerrero state say the fight was between rival gangs. police say at least four prisoners were decapitated. now on bbc news, hardtalk.