50 found dead in the back of a lorry in austria as a summit in vienna tries to tackle the european refugee crisis. this is al jazeera, live from london. also coming up, still miss, but not forgotten. nigeria marks 500 days since 276 schoolgirls were abducted. 10 years on from hurricane katrina, president obama prepares to join the commemoration, live in new orleans. >> and up, up and away. why 100,000 white ball ons are

floating over london's covent gardens. >> talks in vienna to tackle the refugee crisis, up to 50 found dead in a truck not far from the venue. the victims may have been dead for up to two days, when it crossed into the country on wednesday. >> reporter: it looks like nothing out of the ordinary, a truck parked on the side of the road. when police approached the vehicle, the driver was nowhere to be seen, they saw drug seeping out of the back. they were overwhelmed by a terrible smell. inside they found the

decomposing bodies locked in. we don't know the country of origin, counting them is a slow gruesome task. >> translation: how many people from in the struck at this point in time i can't tell you, we fink it may be more than 20 people, 20 to 50 transported in the truck, and all the people have died. it's likely they are refugees, and likely they are people trafficked from east to west. >> reporter: the summit in vena was likely to be dominated by the refugee crisis, the latest tragedy drought an urgency to the taxes you. >> translation: we are shaken by the news that up to 50 people lost their lives in a situation where criminals facilitated illegal border crossings did not care about them, even though they were on their way to places they thought would be safe. it admonishes the need to tackle

the issue, there are more refugees than ever since the second world war. the austrian and german chance lors want to move to a quotacm, whereby european union countries commit to taking in certain numbers of refugees according to size and economic capability. such a system, says angela merkel, would be their. denmark and u.k. say they'll have nothing to do with european refugee quote owes. the plan for quotas was suggested by the european anythings in may. at this summit e.u. officials called for countries to have the courage to take difficult decisions. >> these people come to europe, and come to europe to protection. they need europe to protect them, and we need to live up to our standards of human rights

and respect of international obligations to pect them. >> we need a european approach. everyone says so. >> the leaders discussed ways of helping the countries to cope and stay in the country of origin, that's a long-term solution, there's no immediate remedies to the crisis a boat packed with migrants sunk off libya, security officials say that dozens died, but they are trying to confirm the number of dead. another security source says 100 have survived. more than 33,000 crossed the agean sea from turkey in august alone. jonah hull in at the major really influx to europe

>> reporter: they emerge in the thin light of dawn. now arrivals, some in life vests on the greek island. where do you come from? >> syria. >> reporter: from syria? >> yes >> reporter: how was it coming over? >> not good. >> reporter: why. >> because of the waves. so it was quite hard. >> reporter: what are you looking for? >> the nearest police station >> reporter: i think you a -- probably have 2-3 hours walking ahead of you. >> thank you. >> reporter: where are you from? >> syria. >> we are from syria, refugees. >> reporter: good luck. bye-bye, chow. >> we went, like, 40-45 in a rubber boat, inflated. it was going up and down, and it was during the night children, women, pregnant. that was the poor part, i believe. >> reporter: for everyone. we have been on the road for perhaps an hour, travelling from the capital, towards the popular landing spot closest to turkey, and you see the past five, six groups together, groups multiplying throughout the day,

more than 1,000 newcomers on the island every day. men, women, children, beaches covered in life jackets and the remains of rubber boats. waves of people washing up on the shores of greece. you happy to be here in greece? >> yes >> reporter: do you feel safe. >> yes >> reporter: what do you think you'll find on the island? >> three or normal. >> reporter: do you think you'll find help? >> maybe. we need help. >> reporter: at a bend in the road, waiting for buses that may or may not arrive, it's as if a natural disaster has occurred. after the relief or joy of landing shell-shocked faces belonged to people who thought they left disaster behind. they thought they'd find more than this.

refugees are risking severe injury as they clamber over a racer wire fence faced by hungary across the border with serbia, and as andrew simmonds reports, they can get around the fence. >> this is a 3.5 community fence that separates hungry and serbia. >> it's controversial for many reasons, not least the cost. many refugees cut their way through the razor wire or get over it using various devices, and cut through the fence. there's another problem. it's big. the the fence comes to an end just here. leaving a wide open space.

you can walk in from serbia without interruption and walk back into serbia. i'm there now. what's the reason? as i walk backwards i'm coming into romania. which is an e.u. state. you can't but up a phones or a wall between e.u. states. therefore you have an anomoly with people walking through three different countries. the nearest hungarian village is there, a sleepy place why where the local mayor has sympathy for the refugees, but anger to the the refugees, but anger to the government. >> it won't solve the situation, it's not for the migrants the the government wants to prove they are patriotic and saving the country. >> reporter: within a few minutes of arrival. the hungarian border police arrive to answer questions. they also came to find out who we were. they evern tried to explain the lay out to the land. >> here is the border area. >> reporter: at night time, in large numbers, refugees could cross here, now, they prefer more suitable areas near a town. when the fence is completed, the

problem will remain, a potential hot spot, a place to be exploited by criminals, an example of anomalies, problems that e.u. faces in policing their borders. it's 500 days since 276 nigeria schoolgirls were abducted from their classroom by the armed group boko haram. campaigners have been out on the streets of chibok renewing their bring back our girls appeal. 57 escaped. there's no word from the other. ynonne ndedge reports they have not given up hope. >> reporter: this woman's daughter is one of 200 missing schoolgirls. she refuses to give up hope. she is bitter at the nigerian government. >> the government responded very

slow. these zirs own biological daughters. they don't care about them. we want the government to do something. we don't want anything from them, but our girls. >> reporter: this woman is leading the march, at the forefront of a campaign to put pressure to rescue the girls. >> there's 219 girls out there, waiting to be brought back home. we cannot afford not to continue this. every day we are here, when do we stop. we say not until the girls are back. not without our daughters, we may not have carried them in the womb. but they are our daughter. the girls have not been seen since this video last year. the new president says the government will not stop looking

for them. >> there has been intensified intelligence, recognising us. in a given location in the north-east. i think in the past the government contended with intelligence. i think we are getting into something more specific. >> reporter: the government met with them to reassure them the government is doing everything possible. >> the government says it can't tell relatives or campaigners whether it knows if the girls are alive or were they might be. every day the girls are missing, parents oar relatives are losing hope of seeing them again it's been 10 years since

hurricane katrina devastated the city of new orleans. we'll speak to andy gallagher, who is there. what kind of message will president obama bring with him. >> i was here five years ago when president obama came to mark that anniversary. he gave a generic speech, talking about the progress. the president will address the issue of race and economy. it's no more apt place. this is a lower ninth ward, we expect the president in the next hour or so. this community was one of the hardsest hit during katrina. you'll find devastating, empty homes, less than half the population of this black class neighbourhood returned here. we'll hear the president talk about that. there's a widening wealth gap.

the city has come a long way, there's burgeoning businesses, intre presentures, huge steps. it depends on who you are. the wealth gap between the blacks and whites is faster than any city in the united states. some figures i read suggest the income for a black family is 50% lower than a family in new orleans. that's what the president will talk about, i think, and many will welcome the message andant progress. they see unequal progress, going on foster in white neighbourhoods, and this is a city with a population of african-americans. the politics changed because so many african american residents never returned. losing everything and moved on. that changed the politics and

make-up, making the wealth gap wider. >> andy gallagher, thank you the numbers that died as a result of an explosion at the tianjin port has risen to 145. the former head of the harbour management office has been detained, and 10 other officials and executives that ran the port. they are accused of dereliction of duty and abusing their positions. 12 have been arrested after the explosion at the chemical storage facility this month. adrian brown send this update. >> reporter: in a sense those you expect to be arrested have been arrested, the chairman, vice chairman and three deputy managers of the warehouse where the dangerous chemicals were stored and twin explosions happened three weeks ago. on wednesday, the man that headed the work safety regulator has been sacked. he was a former deputy major of tianjin, a post held for

12 years. you sense the investigation will perhaps be more open. than similar inqui yours, in the past they tended to be opaque. this time the authorities are more open with the information they are releasing. they don't know the answer to key questions. one, why is it that so many dangerous chemicals were stored 800m away from where people were living. chinese law states such chemicals have to be stored at east 1,000 metres away. purchase most of the dead and injured from you were fireman. were they trained to deal with a disaster on this scale. why did so many die. the government promised a thorough investigation, and promised to tighten the regulations governing the storage of such chemicals you're watching al jazeera.

coming up, why human rights watch accused the saudi-led coalition in yemen of killing dozens of people. plus... >> i'm charles stratford reporting from northern ethiopia where conservationists are struggling more than before to save over 1500 years of christian heritage in the rock hewn churches. -

hello, a reminder of the top stories on al jazeera. the bodies of at least 50 refugees found in the back of a

truck on an austrian motor way. >> evaents taking place in nigeria, marking 500 days since 200 schoolgirls were abducted from their classroom by boko haram 145 - death toll rises in the tianjin blast. 11 have been arrested for abuse of power and dereliction of duty human rights watch levelled accusations at the sced saying it -- saudi-led, saying it killed dozens with the illegal use of cluster bombs. >> reporter: more victims of a

war in yemen, according to human rights watch, they were injured by attacks using cluster bombs. they are mostly from a yemeni province on the northern border with saudi arabia. >> we were together, and the rocket hit us. it exploded in the air and cluster bombs fell out of it. before we left the house with the sheep, two submunitions fell down, others spread all over the village. my cousin and i were wounded. >> human rights watch teams travelled to many areas in northern yemen and met with victims. unexploded cluster bombs littered the area. children are high risk of being maimed or killed. three brothers were killed, two children, an adult. it hit us while we were sleeping. we were all wounded, including my brothers. i can't walk, my hands were burnt, bones broken. >> classes, submunitions are cinaccurate. they are designed to target a wide area. here, many people were said to have been injured, as they travelled through the region.

>> we have found evidence that ground trust munition rockets have been used in attacks against seven locations in northern yemen. most likely the rockets were launched from saudi arabian territory. >> the kingdom repeatedly said it would stop the military campaign when it is confident that the shia houthi rebels no longer pose a threat to the internal security. this is a skud missile fired by houthi forces into saudi arabia. the saudi arabia army said the ballistic missile was destroyed in the air. fighting has intensified along the kingdom's 1,800km border with yemen. the houthis backed by troops loyal to former president say they'll fight for as long as it takes.

to guatemala city where demonstrators demand the end to government corruption, earlier in the week the country's supreme court made moves to impeachment proceedings against the president caught up in a fraud case. let's speak to david mercer in guatemala, tell us what is happening, what the protests are about. >> that's right, all morning we have seen people filing into the central plaza in guatemala city. there's thousands, if not tens of thousands here now. it's a carnival-like atmosphere, it doesn't change the seriousness of the objective of the people here today. they want to show their anger at corruption on the part of the government in guatemala, and are making demonstrates for the president to step down. now, this stems from a

corruption case brought to live by prosecutors in april. there has been four months of protests and are culminating with 72 different groups. people from guatemala and all walks of life. there's a show of cores calling upon all politicians to clean up their act, bringing transparency to the process. guatemala's president is facing an impeachment process. he could have his immunity stripped from him, and could face prosecution for his involvement as being one of the ring leaders of the multi-million corruption scam. we have elections in a week and a half. people say it's key to show their anger at the political process here, and for people to change the way they see politics and clean things up and provide guatemala with a different kind of future. >> david mercer at that vocal

protest in guatemala hundreds of people marched through mexico's capital demanding justice for 43 missing students. they disappeared in guerrero almost a year ago. government officials say the students were killed by gang members on orders of corrupt police. relatives reject this. >> reporter: police and anticorruption officials clashed. calling for the resignation of president hernandez. they have gathered for three months since the government was linked to a fraud at the welfare department known as the jerusalem of africa, famous for a spectacular church. for centuries, it's a place of pilgrimage from christians. charles stratford is a prisoner meeting the conservationist

facing a battle to replace the structures. >> reporter: it's the spiritual home for million of ethiopian orthodox christians around the world. the 11 churches were carved out of the mountainside. in the 12th century, during the reign of the prince king. the ancient places of worship, representing sites in jerusalem and places in the bible. the king built built them to pilgrims didn't have to risk the dangerous trek to the holy land. these churches are of immense archeological and historical importance. the places of pilgrimage for ethiopian christians around the world are literally crumbling away. the rock in this area is highly susceptibility to moisture. in this church men use a syringe to inject grout into cracks in a

pillar. >> in terms of seismic activity, resilience, i mean, a slight earthquake would destroy the place. the fact is when you are dealing with natural strata in the terms of an historic building rather than a mine or a tunnel, there's little you can do. you can't line it with steel bars and concrete, you'll destroy the monument. it's historic surface. >> lose those, and you simply are back into rotted geology. >> and that process is not far off on the outside. >> antony shows us what he means. >> and if we start losing material like this, right through here, i mean, the only future for that, without some sort of intervention is this: so the idea of the bandage is to hold it in place. until we can get there to repair it.

because every time it rains a little more falls off. if we weren't to do this, it would be a catastrophe. >> i'm lucky because i come from this area. this heritage is a big thing for us. >> a number of churches have been covered by temporary shelters to protect them from the rain while the work is done. on a hilltop close by, people pray. >> the king did not just build the churches as a human being, he built them with the help of god. it was included on the first ever u.n.e.s.c.o. world heritage site in 1978. preserving this extraordinary place of spiritual retreat for ethiopians for every generation, a challenge they hope they can meet.

london's covent garden is represented as the beating heart of the capital in an art installation of 100,000 white balloons, each individually sized by the french artist. he has been speaking to al jazeera, why he chose this to be the first public display outside of france. >> i'm used to do this for my heart. this installation is a metaphor of a huge earth, and thanks to the huge earth, i have created a bridge with the past. i wanted to connect people with the past and refresh memories. >> every year we try to bring a bit of culture to covent gardens, it is surrounded by

art, culture and performance. what charles is able to do is by his art installation is marry cthe contemporary with the historic. >> it takes five days to inflate the balloons, and four nights to aim at something like 100,000 balloons. i don't count them, of course. i have put a light inside - like the rhythm. when i have been contacted by covent gardens to come and discover the space with a new high to find it in this place. >> it's a little strange, different. it's cool. i like it. it's kind of beautiful. >> it reminds me of a bit of thunder or lightening coming out of the cloud. >> everyone will flock around wondering "oh, my goodness, what

is this", it is actually, amazing. that is on show in covent gardens. more stories on show at our website aljazeera.com. analysis and sport if you want to catch that as well. aljazeera.com. aljazeera.com. >> i'm sylvia rowley in the south of england where support for small scale sustainable fishing is catching on. >> and i'm russell beard in bangkok to meat a team innovative urban farmers turning air polution into protein. and i'm amandeep bhangu in england, where a somewhat dirty source is helping cleanup agriculture.