parts of besieged city of ties from houthi fighters. you're watching al jazeera live from our hours in doha. also coming up. fighting breaks out at a rally for u.s. republican presidential hopeful donald trump forcing him to cancel the event. marring to save a world heritage

site. hundreds of bangladesh are angry about plans to build a new power plant. we meet the afghan teenagers whose dreams of a better life in europe have turned into a nightmare. starting with yemen where government forces say they seized parts of the rebel-held city of taiz. the city has been surrounded by houthi rebels for near only a year. forces backed by-- fighting continues in eastern areas cheering crowds welcomed the news that forces support the president and to control western and southern parts of yemen's third largest city. >> they are in shock in yemen, the houthis.

this was not expected. for 24 hours yesterday they were in control many parts where they were defeated in the strategic areas of taiz. >> reporter: proceed party forces back bid the saudi arabia led arab coalition have opened a key route from aden >> hundreds of fighters who were troops allied with the houthis switched sides. this was the main reason why taiz was able to fall into the government hands. they're trying to finds answers of why this happened. supplies as well as food and heating oil may not be delivered. hospitals have struggled for months to take back taiz held by

rebels since last march. it is held in areas taken back by houthis in july. government forces are said to be targeting basiss to the east of taiz. they're sending for reinforcements and intend to take back the areas they held. rob matheson al jazeera our correspondent joins me here in the studio. he has covered yemen extensively. this is a city that has been under siege for over nine months. what has allowed this break through for the coalition. >> forces are desperate for a military gain, particularly in taipz for different reasons. they haven't been able to make any significant military gain in the past despite the massive air

strikes. for them taiz is quite significant because if you control taidz, then that could pave the way for them to move north toward the capital. probably for the time being north of the city is under the control of the houthis and there are at least six units of the guard loyal to the president which has taken over now. it is going to be extremely difficult for the government forces to dislodge forces from that area. now they will be able to deliver humanitarian aid and also channel weapons. if you go to the eastern parts and northern parts it's still understand control. we have-- under control. we have seen that pattern in the past. you need to really take control of areas and hold the grounds, but the problem is that they

still have massive weapons and you can easily retreat from those areas. we've seen that again over the last year is this a shift, perhaps, in the course of the war. is the tide turning against the houthis? >> we've seep a change of tactic because the government forces are no longer focused on taking over a city. what they're doing now, they will send troops to the capital and they would send them to other areas. it will be a long way to go before they control those places we have a brief question about those talks in saudi arabia. where are they going? >> talks are an indication that, perhaps, saudi arabia is willing for a compromise to end the conflict. if you look at the map, they still control a massive area that stretches from taiz.

taking over those areas will be vital for the government. they're desperate for a political way out the arab league has declared hezbollah a terrorist organization over its backing of syria's government in the war, saudi arabia and 19 of the arab league membersd supported the move, but lebanon and iraq rejected the decision while al jazeera expressed reservation. last week the-- republican presidential hopeful donald trump has cancelled a rally that was due to take place in the u.s. city of cincinatti on sunday. it was after his convenient ee was not cleared by security. on friday he was forced to call off a campaign drive in chicago. >> reporter: people protesting against donald trump lined the side walks outside here, it

didn't take long for things to get heated inside. the crowd and to be split by 60% supporters and 40% opponents >> >> law enforcement has determined that for all the safety of tens of thousands of people gathering around here will be postponed until another date. thank you very much for your attendance please go in peace. >> reporter: that didn't happen. protesters and donald trump supporters exchanged angry words. fights broke out. a man tried to take the stage. after a struggle security officers removed him. a large contingent of police eventually came in and cleared the arena but the battles moved outside. some of the thousands clashed with the thousands of people outside and with police. in an interview with ms n.b.c. donald trump said he made the

right decision to cancel but said the anger wasn't directed at him >> you have people that are very, very upset about what is happening with the country as a country and you have other people that just don't feel right about things. those people are outside. they were coming inside and rather than having everybody get in and mix it up, i thought it would be wise to cancel. >> reporter: protesters gather outside the arena long before the event. people had petitioned school administrators to cancel the really. they were concerned it would create a hostile and dangerous environment for students. when it was all over, donald trump supporters were disappointed. >> i think this is bad. >> it was disappointing. i wish he would have came and

supported us, but at the end of the day i'm still voting for him. nothing has changed 250 kilometer march is taking place in bangladesh. they're mashing towards the world's largest mangrove forest. in 120 an agreement was signed to develop the power plant. the company will visit the country this month to discuss the environmental impact on the area. >> reporter: hundreds of people started a move on thursday. the largest mangrove forest and international carried the side. these are the protesters on the move to the mangroves to stop in

different towns to persuade others to join them. many people joined them and showed their solidarity. they were prevented this morning by holding a rally. tomorrow enthusiasm should be marching to the main goal which is to persuade the government to stop building two major coal-powered plants in the area and to persuade and bring public awareness. the government hardly seems persuaded. they're adamant to go ahead with the projects. the construction site has already started. international and local environmentalists feel there is a danger to the mangroves if this goes on

lots more still to come. we take a look at how europe's refugee crisis. also power tariffs despite regular power cuts in nigeria. in nigeria. al jazeera america's... >> today they will be arrested. >>they're firing canisters of gas at us. >> we have to get out of here.

welcome back. let's recap the headlines here. yemen's vice president has announced the houthi size of taiz has been broken after a

break in the city. fighting is still underway. u.s. republican presidential hopeful donald trump has been forced to cancel his campaign rally in chicago after fights broke out between supporters and demonstrators. he also had to cancel a rally schedule for sunday after the venue was not cleared by security. a 250 kilometer march from dakaar is taking place in bangladesh. protesters want the government to scrap its plans for a coal-fired plant close to the man groves farrest which is a world heritage site. russian air strikes have been blamed for the deaths of several people across syria on friday, including at least 10 in aleppo. i.s.i.l. released a video appearing to show the aftermath of one of those strikes. at least 15 people were killed when a bus in homs was hit.

it was han two weeks since the truce has come into effect. al-nusra and i.s.i.l. are not part of that truce. demonstrators in syria protested against the bashar al-assad regime. marches were held across the country in at least 15 cities, including azaz where people were seen chanting slogan against the government. in a small town to the north of idlib, al-nusra supporters disrupted the demonstration. meanwhile members of the u.n. security council have been accused of making the crisis in syria worse. aid groups say countries, including the u.s. and russia, are unioned mining their positions by supporting opposite sides in the war. >> reporter: it is a grim milestone. almost five years since the start of syria's civil war and a new report by aid agencies, including oxfam, action aid,

save the children and several syrian charities says the past year has been the worst yet. the report titled "fuelling the fire", notes that some 50,000 people have lost their lives in the past 12 months, with almost a million civilians forced to flee their homes. 200,000 of those homes were partly or completely destroyed in 2015. a million and a half people are need of humanitarian aid with an additional 400,000 children no longer in school because of the violence. the report notes failures by the international commune, both through inadequate diplomatic pressure and direct military involvement in support of their allies. u.n. security council resolutions it says has consistently been flouted by parties to the conflict and their international backers, including permanent members of the u.n. security council, have actively added fuel to the fire.

the report highlights how air campaigns since september last year has damaged civilian infrastructure while causing thousands of civilian casualties. bombing by the u.s. led coalition is noted to have caused deaths and damage to civilians areas and the international powers are accused supplying weapons to opposing forces on the ground. the report notes that a partial cessation of hostilities has resulted in fewer civilian casualties and greater humanitarian access to besieged areas. however, it says all parties, including governments that sit on the u.n. security council bear direct responsibility for the war in syria. jonah hull the greek government plans to clear out a makeshift refugee camp on the macedonian border in two weeks. on friday tensions spilled over

as people fought for food a. macedonia, along with other balkan states, have shut their borders to refugees hoping to travel to northern europe. refugees from afghanistan are among the thousands heading to europe in search of a better life. for many, the journey for children can be terrifying >> reporter: it's a moment of respite in a life otherwise filled with hardship, loneliness and instability. like 17 yeared wase, em who left pakistan with his -- afghanistan with his parents >> the smugglers took me away and i haven't seen my family since >> reporter: he is now receiving medical care in the camp along the border with serbia, unable

to move forward as afghans are no longer welcome on the balkan route. 16-year-old yeseen is in the same situation. he is an orphan who first worked in iran as a janitor. >> translation: they were trying to deport me because i did not have a passport because i left. i want to be in a place where there are no weapons where i feel safe. i paid smugglers and i'm sad to be stuck here. >> reporter: along the way he became a friend with this teenager who is a year younger. they picked up clothes left by other refugees and hoping to go undetected. they relied on food left by compassionate people along the trail, but some of their friends didn't make it. >> translation: there were two other teenagers with us. the smugglers wanted more money. they removed their money but they still did not have enough, so they were kidnapped and taken

away. i don't know where they are. >> reporter: the camp here in macedonia is teaming with unaccompanied children. many say they are 18 fearing they could end up in a shelter for minors. others claim they're travelling with relatives so they are unacted for. >> reporter: every day there is a count on how many are here. people here want to reach their designation so some take their chance at crossing the borderline. it is what these and many others are considering. for $1800 they're promised safe passage all the way to germany. it will mean more deaths and more suffering. waseem is over whelmed by a sense of lost. at 17 he has little to live for >> translation: if they don't open the border, i will kill myself. if i have to go back to afghanistan, i will dedie there

so i might as well end it here. >> reporter: europe is crumbling understand the flow of refugees, but the children have been abandoned by everyone, the border closures increasing the vulnerability of the risk of them ending in the wrong hands in germany three states will elect new parliaments on sunday. these elections are a major test for chance la angela merkel refugee policy. she is insisting on keeping her borders open. polls show supporters have surged for the right wing party, the alternative for germany. >> reporter: there is popularity for this party. the alternative of afd once concentrated on opposing the

euro. now their main concern is the influx of refugees to their country. >> having taken more than one million asylum seekers and waiting more awaiting families as well, it is going to cause huge problems in germany on all sorts of levels in politics >> reporter: shifting their phonings on to immigration have won few friends among the political parties, but it has gained them popularity with voters. before the influx of refugees really started last summer, afd was receiving less than 5% in the opinion polls. afast forward to now and that number has more than doubled. one leading academic told me he thinks the coalition government's immigration policy is the main reason why. >> the afd had really a good opportunity to get profile as an important and necessary part of

the german spectrum which gives voice to those citizens in increasing numbers who are not represented by the politics of the party. >> reporter: for now the test for the party is in the state parliament. the german federal system gives the states considerable powers and elections there matter. the eastern state is one of three to hold elections on march 13. a recent survey suggests the afd has now sup planted the main social democratic party here, a point some afd supporters were keen to make at a rally. >> translation: we know that they're not all war refugees. we're also human and we want to help, but we will not be made fools on. that's exactly what is happening. that's why we're here to support the afd. for the old parties it's over >> reporter: the people at this rally clearly believe that the afd speaks to their concerns,

but the question for the party will be whether they can translate their opinion poll performances into actual votes. dominic kane cuba has signed a historic deal with the european union normalizing relations. foreign policy chief met cuban president after two years of negotiations. e.u. is cuba's second biggest trading partner despite differences over political reform and human rights issues. nigerians will be facing higher electricity costs as provides say it is the only way to improve power supply. consumers don't agree. many say access to power should improve before prices go up. >> reporter: this man is very unhappy at the 65% rise in his electricity bill. he rmz heavily on having a

steady power supply for his workshop. >>-- relies heavily. >> the light is steady, but how will you pay if light is not steady. >> reporter: electricity provider says it will generate revenue to envit in of needed improvements >> no-one wants to pay more. the reality is there have been decades of under investment and we need to get the supply chain healthy. you can only do that when the revenues are there. >> reporter: to the government recently privatize the electricity industry. only six million people are on the national grid. the industry reck lator says consumers were worse off under the old tariffs >> if we stayed with the old tariff, we would be staying with

the fixed charge, which the people didn't want, we will be staying without the protection that a new tariff offers. we will also be staying with the potential for increased tariff. it will still increase. >> reporter: the amount of electricity that is being stolen is driving the increase. providers are taking action. hundreds of thousands of so-called walmart meters are being installed. the technology will be able to stop stop customers illegally siphoning off power. the effects of under investment, mismanagement and corruption may take years to wear off so providers can eventually meet demand. one thousand obviously yejs, which are close to the capital, have never had electricity >> we feel very bad and we feel as if we are not human because there is no electricity.

we are not in the world. >> reporter: villagers here hope they will get connected to electricity supply soon, but $100 million is needed for decades scientists have been debating what causes extreme weather events. awe now a team in the u.s. says it has developed new technical neengs that can link human activity to droughts and cyclones. >> reporter: these are plants that are clogging here at the end of a hot summer. in the continent suffering under the effects of el nino, millions would welcome new science which could tell them precisely when storms and droughts will strike. that may be able to happen. extreme event attribution. a branch that wants to link human activity to individual

events >> it moves us forward so that one day we can predict extreme events months or years in advance. >> reporter: until now scientists have simply compared general computer models to try and work out what's going on. is human activity changing the worth or are we looking at the effects that have warmed and cooled in the past. we all know the weather, or we think we do. it is a cool day at the end of one of the hottest summers. how much of the weather is attributable to climate change, greenhouse emissions, rising sea temperaturess and melting ice glaciers. it is being compared to the report in 1964 that links

smoking with cancer. >> better global planet models could help, better understanding of some of the science or the aniesics involved could help. better use of observational data sets and records could all help on that. so that sort of on the science side. on what would a person who is responsible for safety or for the welfare of people using, i think it would be very good if she or he would understand now that, yes, science can do this attribution and to really look at that risk factor. >> reporter: since the panel on climate change in 1995, the world has moved a long way to halting climate change. this group seeks to accelerate those efforts a spanish built 16th century church has resurfaced in mexico. it was flooded along with the

town in 1962 to make way for a dam. since then, it has and three times during severe droughts. there has been no rain in the area this year. there's more there at the website at aljazeera.com [♪ music ] this week on "talk to al jazeera" - chef and restaurateur marcus samuelsson. >> being able to have windows into three, four different communities is something that i feel privileged to the swedish-raised celebrity cook was born if ethiopia but group in scannedan ava. he and his sister were adopted r