The European Space agency tests technology for a new reusable space plane. The leaders of germany, france, ukraine, and russia are now in minsk, the capitol of belarus trying to get a peace deal hammered out for eastern ukraine. Since the beginning of this year hundreds of people have been killed in fighting between ukrainian troops and prorussia separatists. Rory challands with more on what the leaders hope to achieve. Reporter were talking about things like ceasefire lines, where are the front lines that separate the Ukrainian Army and the separatists themselves. Were talking about things like the border between russia and ukraine, who is going to make sure that border is not the conduit for weapons and men as the ukrainian governments and western governments have been accusing russia of using that border over the last year or so and were talking about self determination, independence autonomy for the self declared republics themselves. But its the sequence of them how do these things get put in place, the order in which they happen that can allow a ceasefire to take place, hold and deliver some sort of meaningful situation by which a proper political settlement can occur . There have been various leaks that have been come out about the terms being set out in these talks. We will have to wait and see what the leaders decide when they come here. Were expecting them maybe as soon as in the next hour or so. You wont be able to see, but behind me there is now a guard outside of the president ial palace and a red carpet waiting for these people to arrive. If there is no deal then were going to be in a very sticky situation. What has triggered this flurry of activity this diplomatic burst of action that we have seen over the last week is a real worry in europe and america, the United States as well that this situation is getting out of control, and that it might possibly run into a wider configuration, a proper proxy war in the Old Fashioned sense, you used to see them in the 20th century, where the west would back one side russia would back the other, and there would be furry unleashed in a country that is in the center of europe so if nothing is agreed here, then we might see the situation of america coming in and properly arming the ukrainian military. We might see russia unveiling its hands and basically openly supporting the separatists and possibly troops coming in across the border in a in a proper proper sense. Thats what everyone is worried about. Thats what these talks are trying to avert. Fighting between ukraines military and prorussia separatists continued with at least five People Killed in an attack at a bus station in donetsk. Charles stat ford has the latest. Reporter a burntout bus station, just hours before we get anothers a tempt at negotiating an end to this conflict. Translator when i ran here i saw two people being pulled out. One was in very grave condition. He had his legs broken. Translator there was a high column of smoke. Thats when i realized there was no sense in waiting here and i ran to hide. Reporter thousands have been killed in seemingly indiscriminate shelling by both sides of this conflict. The attack came a day after at least ten soldiers and civilians were killed when missiles hit an army base in the ukrainiancontrolled city. The ukrainian president visited the hospital and spoke to some of the wounded. Civilian People Living in their houses where there is no other military option. There is almost 50 kilometers from the front line and the russianbacked rebels and terrorists attacking civilian attacking peaceful city. This is absolutely unacceptable and thats why these crimes will be punished we demand immediate unconditional ceasefire. Reporter the attack on the Shopping Center behind me happened yesterday, but the violence has dramatically increased over recent weeks, and the shelling continued right up to the beginning of the peace talks. We went to a village close to the front line. Translator i want to live in peace. I dont want them to keep shooting to kill. Reporter nearly 5,500 people have been killed and almost 13,000 wounded since this conflict began. The political divisions run deep and have Huge International implications evidence so far shows just how difficult it is to get both sides to lay down their arms. The United Nations believes that more than 300 migrants died trying to cross the mediterranean. Dozens of others were rescued, as the migrants tried to get from libya to europe in rubber boats. Neave barker has more. Reporter in high seas and plummeting temperatures, two migrants are spotted in a ding y. Survivors said that many more people are missing. The underrefugee agency says it is feared that more than 300 are dead. Its quite surprising that e. U. Cant respond with a stronger solidarity humanity and strategy to that. Reporter at least four else haves are believed to have left libya. 105 people were picked up by the Italian Coast Guard trying to reach europe in a small fishing boat the fourth vessel remains missing. The survivors were brought here to lampedusa who has struggled to handle the number of migrants from africa. More than 3,000 people have lost their lives attempting to reach europe by sea. The latest deaths are likely to reignite the decision to end the rescue program. It scaled back the scheme after e. U. Partners refused to share running costs of 10 million per month. In the Vatican Pope Francis held prayers for the victims. Translator more migrants have died because of extreme cold during their long journey. I want to assure you of my prayers to the victims, and i again encourage solidarity. Reporter the coast guard is now continuing its hunt for survivors, but italys new rescue program that only operates a few miles off of the italian coast has put thousands of lives at risk. Houthi rebels have reportedly ceased u. S. Embassy vehicles in the yemeni capitol. The u. K. And france have said that they too are closing their embassies there, because of the worsening security situation, and the political crisis. Thousands in yemen have taken part in rallies protesting about the Houthi Rebels who seized power in a coup last week. The demonstrations were on the fourth anniversary of the 2011 uprising. The Southern City taizz was at the center of mass protests. Its from there that our correspondent reports. Reporter they came by the thousands, chanting freedom, freedom, as they marched through taizz, the birthplace of yemens revolution. These protests were originally meant to mark the fourth anniversary of the uprising but since last fridays coup the calls changed and they have become protests primarily against what happened in the capitol sanaa. There were several anticoup protests across the country, a sign that even though the houthis are increasing their grip on power, there is widespread opposition to them. But protests may not be enough to stop the power grabby the houthis. The fighters took control of another area. Security personnel are on high alert in the remaining cities. There is an increased fear amongst people here. They believe now that the houthis and their militia have taken control of most of the main cities in the north, that they could attempt to capture taizz and thats why there are several of these check points across the city. The United Nations envoy said that the country could very well find itself in a civil war. Translator the collapse of the state and the breadth of violence and militias and militant groups in addition to the situation in the south, are all signs of negative indications. We stress the need for all parties concerned to give up to their responsibilities. Reporter the United States announced it was closing its embassy until further notice. The u. K. And france followed suit all siting the deteriorating security situation. A sign that things could be about to get worse. Four years on instead of celebrating the achievements of the revolution all these people can do and protest and hope that their calls for freedom and unity are heard. Stay with us if you can. We have this coming up the heard of a group which recruited young fighters for isil in belgium is sentenced. Boko haram intensifies its campaign against neighboring countries, dozens of People Killed in niger. You are watching al jazeera. Im david foster and these are the global headlines. The leaders of france germany, ukraine, and russia have traveled to minsk to hold a meeting on the crisis in eastern ukraine. A ceasefire signed last september has not held. The u. N. Says it believes more than 300 migrants died trying to cross the mediterranean. They were in four rubber boats thought to have left from tripoli on saturday. Houthi rebels have reportedly seized u. S. Embassy vehicles in the yemeni capitol. The u. K. And france says they are also closing their embassies because the situation is too dangerous. Iraqi special forces are on the offensive in central iraq. They are under attack in ramadi the capitol of Anbar Province. Reporter these are members of iraqs elite golden brigade on operations in ramadi. They are engaged in battles are isil fighters every day. It is important because it is the capitol of Anbar Province an area in central iraq. Isil controls most of anbar and it also wants to seize its capitol. But isils defensive is being pushed back by a brigade of Iraqi Special forces. Translator the golden brigade are now in the district. We have achieved progress, and we will continue despite the difficulties, you know explosion explosives and ieds are everywhere. Reporter witnesses say most of the neighborhoods in ramadi have become regular battlegrounds, and intenls fighting has reduced the city to ruins. Some iraqi soerlsd have been battling isil fighters for more than a year but they are determined they can win. Translator we have been like this for a year now. Our morale is very high. Every day isil attacks our positions, but they have suffered huge losses. Reporter it has been eight months since isil swept through northwestern iraq to the out skirts of bagdad. In ramadi the government has sent in reinforcements but elsewhere, progovernment tribes complain they are not getting the support they need. U. S. President barack obama is asking congress for authorization to use military force against isil. Alan fisher has the details from washington, d. C. Reporter will this change anything on the ground . No it wont. America will continue to bomb isil as they have done while Congress Debates the proposal put forward by barack obama. It sets a time limit on this operation to three years, which means the next president could decide to stop it or continue it. And it also limits the enduring use of Ground Troops which suggest there is a window there for Ground Troops to be used. Barack obama sees the threat from isil threatens the very homeland of the United States. We snow that congress is keen to pass some sort of measure that gives him the power to wage war against isil. He is doing so now under legislation passed which was to take action against those who helped coordinate and organize the attacks in 9 11. Remember in 2002 isil didnt exist. Congress will hold committee hearings, call people to give evidence, so this may happen in the next few months. Barack obama has urged them to act quickly, but it really tidies up some legal ambiguities. And the operations will continue. A court in belgium has sentenced the leader of a man who was found guilty of recruiting people to fight for groups such as isil. Its part of mass trial of 46 young muslims. The biggest of its kind in belgium. Reporter there was high security outside of the court. But the 46 accused only 9 were in court, the rest are in syria or have died here. The judge declared that the group sharia for belgium was itself a terrorist group. Around 350 young belgiums have been in the group. This verdict is designed to send a very clear signal to those thinking of going to syria that regardless of what they do while they are there, they will face prosecution if they ever return to belgium. If you want to be a member of a terrorist organization and if you into for the same activities cooking, cleaning other substantial things to people who are going to fight, that is enough in belgium for getting a very ser veer sentence and thats the signal that the court was giving today. Reporter across europe is is an urgent debate about how to stop young muslims from becoming radicalized. Were not focusing on the repression response because we think indeed building on the movement and promoting [ inaudible ] values cohesion in society is equally important. In europe but also outside of europe. So we really want to help the balance right now. Reporter today police and soerlsd solders are a common presence on the streets. Wednesdays verdict may set a harsh example, and it may discourage some but it wont do anything to rebuilt trust. Simon mcgregorwood, al jazeera, in altwerp. Boko haram is continuing its raids into countries border nigeria. Dozens of civilians have been killed in niger. Our correspondent has more. Reporter the streets are almost empty, shops are closed. In this town in niger, along the border with nigeria, dozens of civilians have been killed in attacks by boko haram fighters. The wounded are treated at this hospital which is now protected by the army. This doctor is in charge of this small medical facility and the staff are now struggling with a growing number of casualties. Translator in the last few days we have treated 50 people who were injured in the attacks. Ten died. Almost 34 people have been killed so far. They were mostly civilians. Reporter these are the victims of a boko haram suicide bombing in a busy market. The armed group has been on the offensive in the area. Its fighters say their attacks are in retaliation against a military Campaign Lead by troops from niger and chad. Many people have escaped from the area. They are worried about more attacks. The mysterious death of a prosecutor in argentina has shocked the Jewish Community there. He accused the government of covering up the bombing of a Jewish Community center. Daniel reports. Reporter sophia lost her only daughter in the bombing attack on at the Jewish Community center on the 18th of july, 1994. She has been waiting, fighting ever since for answers. Translator at first, the pain was unbearable and it continues to be unbearable but one learns to live with it. We believe everything they promised us that within a year all would be resolved. Reporter but more than 20 years later, they are still waiting, still marking the anniversary. Their pain highlighted by the death last month of investigator Alberto Nisman. Translator i hope there will be justice for nisman. He died for us. He dedicated himself exclusively to the bombing. We call him the 86th victim but i hope we wont see the same inpumin inimpunity as for the other 85. Reporter but the families dont all agree on how justice should be achieved. Some support the government many do not, while others take a different course. Translator were not going to say what others want to hear. Were not going to play politics to win supporters. We tell the truth, and if that upsets people thats their problem. Reporter this is Election Year in argentina, which further complicates the issue, while everyone says they want justice for the victims and Alberto Nisman both the government and the opposition have been accused of playing politics with the case. Translator we dont want anyone using the army of dead or the death of nisman for political purposes. Reporter argentina has the largest Jewish Community in latin america. The bombing, and the attack on the Israeli Embassy two years earlier in which 29 people were killed remain unsolved. Since then the community has lived under tight security. While so many questions remain unanswered and justice has still not been done after the bomb that exploded here on this cite nearly 21 years ago, the wounds remain unhealed. With this latest scandal, the death of Alberto Nisman those wounds have only reopened both in argentina in general, and the Jewish Community here in particular. In vietnam a once filthy smelly waterway has been transformed. It took a decade and has made the city a model for improving urban infrastructure. Scott heidler reports. Reporter enjoying the air and the view was unthinkable when this woman was growing up in this house. Her family has lived along the banks of the canal for 50 years. Translator the water was black. There were most quitos all over the place but after they removed the mud and garbage, it cleaned the air. Reporter but it took more than dredging and trash removal. This was the first phase of a politically and tech anily ambitious plan by the government. The goal to clean up the canal. It took a decade to complete and some were resettled by the government. The improvement on the surface is obvious. Along the 8 kilometer long canal that snakes through the center of the city. But its the 56 kilometers of sewer lines dug beneath think canal that are the key. This phase cost 360 million, nearly 80 of that came from world bank loans. Translator our project is the first largescale operation with these solutions and technologies being built at the same time. We constructed several layers of sewage and drainage lines. Reporter and there are more areas of the city to be cleaned up. The phase two funding was approved late last year 450 million. This man moved near the canal just after the cleanup started. He saw promise and a good investment. Translator the houses in the alley now contact to the road so their value has increased. The cleanup improvements the environment improved the economy, but also improved the economy. Reporter scott heidler, al jazeera, ho chi minh city. The European Space agency has carried out a test flight for the first reusable space plane. Now its focusing on the technology needed for the plane to reenter the earths at most tier. Tarek bazley explains. Reporter the successful launch of a rocket from europes space port on board, the European Space agencys 169 million experimental vehicle. Packed with sensors and about the size of a scar. Were going to gather a lot of data. We have more than 300 sensors, we have infrared cameras. So were going to master the reentry phenomenon. Reporter after separating from the rocket. The twoton vehicle climbed to a height of about 400 kilometers. Reaching speeds of around 7. 5 kilometers a second, around 27,000 kilometers an hour. A test of its strength and maneuver ability. We will eventually be able to look at these types of obligations of brings back to people from orbital infrastructures, but also the capability to bring back launcher stages for example, for reusable launch vehicles as well as to open the way to the possibility to bring back samples from asteroids or other planets. Reporter just over an hour and a half after launch the craft splashed down in the pacific ocean. The job now is to process the vast amount of data on board, information that will be invaluable that they work to develop a reusable space plane for the future. Out of this world is our website, aljazeera. Com. They work in the darkest depths of the earth, your honor seen and unheard by the world above