>> techknow only on al jazeera america >> tunesizia's president visits the site of an attack on a national museum and vows to fight terrorism. many killed were tourists. the international community unit in condemnation. i'm here in doha. also ahead - a victory in boko haram. chad and niger retake a town in north-eastern nigeria two al jazeeran journalists due back in court in egypt in a case described as baseless by

legal experts. >> it took a few hours to cut down century old trees. find out what the villagers in southern senegal are doing to fight back against illegal smuggling tunisia has named the two people it says were behind the deadly attack on one of the capital's popular tourist sites. the announcement follows the president's waging a war against terrorism. this is the scene in tunis now. we are looking at the entrance to the museum. there are several armed guards. here is a reminder of what happened on wednesday. two gunmen in military uniforms stormed the museum killing 14 people 12 tourists. hours later security forces stormed the museum next door to

tunisia's parliament and killed the gunmen. it's unclear what the motivation was. >> dozens gathered in tunis to pay their respects to the people killed in the attack. more from al jazeera's jacky rowland in tunis. >> reporter: tunisian security forces call out for reinforcements. they surround the bardo museum a famous tourist destination. there were hundreds of visitors inside when gunmen opened fire. some managed to get out, running for their lives. authorities say the gunmen hunted people down spraying bullets. >> translation: we were visiting the museum. suddenly we heard big noises. at first we thought it was a statue falling. bit by bit we realised it was gunshots. there were four of us. we found a couple with children and didn't know what to do. we hid on the top floor.

after a while the gunshots stopped. there was a guide, we stayed for an hour on the floor without moving. the police told you run, run, get out quickly. they took us to the military barracks. tunisia's past. which is next was in session at the time of the attack. quickly police moved in killing two gunmen. there are reports up to three others that helped the assailants may be on the run. >> translation: we want to send condolences to the families of the victims. the tunisian people must understand we are at war and will not be leapient. >> reporter: tunisia has been fighting armed groups. the military and police have come under attacks. no one expected this. later, shock gave way to defines. hundreds gathered in the

capital, voicing their anger. >> tunisia has been seen as the suck tes story of the arab spring. other parts of the region has been racked by violence the small country making a peaceful transition. how the government and people react to the violent events on wednesday will be crucial. at least four people have been killed after heavy fighting between rival groups in southern yemen. the battle forced the closure of the international airport in aiden. forces loyal to the former yemeni president, and those backing the counter president abd-rabbu mansour hadi, fought around the security forces base close to aiden's airport. abd-rabbu mansour hadi insists he is the legitimate leader and is trying to build a power base in aden an international coalition fighting boko haram drove the armed group out of a town in in

north-eastern nigeria. the area that borders niger was retaken from the group over the weekend. it 228 boko haram were reportedly killed. for from abuja. >> reporter: there has been reports about mainliour towns being captured by boko haram. it could mean the beginning of the end of the boko haram insurgency. according to the military various towns have been recaptured. like baga the scene of at least two massacres in which hundreds were killed. and now damask. two days ago a spokesperson tweeted that other areas are free. borno will soon be free. the three states in the north-east have been worse affected by the boko haram crisis. there has been misinformation and inaccuracy around the

insurgency before. the military previously announced the capture and killing of the boko haram leader. only for him to then appear on youtube videos days later. no one is holding their breath or saying it's all over. if the reports are to be believed, the end of boko haram, according to the military is horizon. the impact of all of this on the election has to be positive. the presidential poll is due to be held on 28 march. governship in april. and security a major concern. the ability of people to vote is a major concern. the belief is that the election will go off peacefully and safely. >> negotiations between u.s. and iranian diplomats entered an bornt phase as they try to reach the nuclear programme. they have until the end of the month to finalise an agreement. let's go life to the diplomatic

editor james bays who is in lasan. what are the chances of meeting the end of the month deadline? >> well they are working extremely hard to try to reach that deadline. they are going to continue negotiating definitely for the next day or so. the iranian new year invested so much time personally in this process, has to be back in washington d.c. to meet an afghan delegation led by the afghan president. it's likely i think, at this stage that they'll be back here this week. what is going on at the moment is a series of intense negotiations on a number of different tracks. you have the nuclear negotiations on the nuclear programme. thi started moments ago -- they started moments ago with the unenergy secretary talking to the head of the nuclear programme. then you have the political

discussions, with secretary john kerry and zarif, his counterpart negotiating. the problem is how to lift the sanctions. the third track is p5+1. they have representatives and are talking in large groups with iranians. >> sounds like from what you are saying that there's a lot to discuss. what are the remaining sticking points? >> well i think on the nuclear side, it's the issue of the future. it's research and development, and how that would continue during a deal. the timeline of the deal we suspect, is going to be about 10 years. and on the political side i think it's sanctions. how you lift the sanctions. there are u.s. e.u. and there are sanctions that were imposed by the u.n. security council. very easy to lift all these sanctions, hard to put them in place. the international community wary about lifting them all.

because they want to make sure if there is a deal iran complies. they want a sanction structure in place that could be reimposed if they are unhappy with iran's behaviour. >> diplomatic editor james bas. >> a court in myanmar sentenced to two months imprison after finding them guilty of defamation. the chief editor and a reporter were charged in february last year. newspaper published remarks made by an unnamed politician about the level of education held by military representatives in parliament. parliament. they may be out of prison but the legal case continues for two al jazeera journalists. the retrial of mohamed fadel fahmy and mohammed badr is under way. their colleague peter greste is

back in australia. >> reporter: they have been in this court many times. they hope it will end differently. mohamed fadel fahmy and badr's retrial began in february and the frustrations resurfaced. the court proceedings have been postponed three times, during a hearing the judge said peter greste had to be present. after spending more than a year behind bars peter greste was deported to native australia. as a citizens of canada mohamed fadel fahmy is hoping to be deported there. a judge released badr and mohamed fadel fahmy on bail. they must check in with the police every day, whilst fighting criminal charges. they are accused of aiding the now banned muslim brotherhood. legal experts called the case baseless. >> despite living under the crowd of criminal charges, badr feels fortunate to be reun ited

with his family. >> i'm happy to go back to my family. >> reporter: it's hoped the trial will be moved forward, and closer to exonerations pakistan granted a left-minute stay of execution to a man sentenced to death at the age of 14. the man, now 23 had been scheduled to be hanged on nurse for the killing of a 7-year-old. an inquiry will look into his age at the time of his conviction and the torture that he said he suffered to pressure him into a confession. a constitutional lawyer in lahore says the conviction was a miscarriage of justice. >> every report and the trial record shows at the time of the trial, no one cared to check the age of the boy. as a result, it was never noticed in trial, also that it had come before the high court. when it reached the supreme

court in 2007 someone raised the objection that this boy, in fact was a minor at the time of the conviction and the supreme court rejected that ground saying that under pakistani law, if you don't take a particular objection at the trial stage, you can't raise if in the objection statement. still they are in the stages. they are in the legal fraternity and the n.g.o. sector looking to gex them and within the paradigm of the structures. as i said earlier at the time of the trial. nobody realised the boy, now under the constitution. the only thing left to do is to provide the president with the power to pardon or commute the sentence. it was first started in 2012.

we third the news that the president was going to consider it, and put a stay on the death penalty, it's 72 hours, and this gives time to bring the evidence on the record. >> still to come on al jazeera - not changing their tune - russia reinforces their control of crimea as people celebrate the anniversary of its annexation. >> it's the stuff of science fiction. robots in the home and work place could leave people without a job.

>> sunday night. >> 140 world leaders will take the podium. >> get the full story. >> there is real disunity in the security council. >> about issues that impact your world. >> infectious diseases are a major threat to health. >> "the week ahead". sunday 8:30 eastern. only on al jazeera america.

this is al jazeera. a reminder of the top stories, tunisia named two people behind the deadly attacks on one of the popular tourist sites. night-time vigils were held for 14 killed in a siege. 12 tourist an international coalition fighting boko haram has given the armed group out of a town in north-eastern nigeria. damasak which borders niger was retaken from the group over the weekend negotiations between the u.s. and iranian diplomats entered an important phase. they tried to reach a deal over the nuclear programme. a meeting in the swiss state of lisan and have until the end of the month to finalise the agreement. >> there has been intense fighting near the eastern ukranian city. despite a fragile ceasefire,

between ukrainian drops and pro-russian separatists. shelling and machine-gun fire has been held. it is strategically important because it's home to the main chemical plant thousands in crimea have gathered to celebrate a year since the region was annexed by russia. people voted to become russian citizens in the referendum following the seizure. despite being condemned by the u.s. and criticised by the u.n. they say they have no regrets. >> reporter: crimea celebrations may be stage managed, but are felt by the region's majority of ethnic russians. in the home of the black sea fleet. the administrative center - the mood is jubilant. >> we are very glad.

we doubted a little in the beginning. now we are sure. we have sentiments about joining russia. >> i lived here for 25 years. during the period we didn't see anything good. now with russia life is easier. you feel free. i realise my plans. russia is a big state with a big future and powerful potential. there were big organised celebrations in moscow. and a few words from the man who boasted in a documentary that he handled the takeover of crimea personally. >> reporter: we will go forward. we'll strengthen our state ad our country and overcome all difficulties that we created with ourselves all of the time. of course we will overcome the

problems and difficulties that they throw at us outside. they are used as attempts against russia. thank you for your support. long live russia. >> the kremlin says that crimea is russian, and will be. case closed effectively. but crimea is likely to be a geopolitical store. western governments view what happened as an illegal land grab given a veneer of legitimacy by a quick and dirty referendum. they refused to recognise it as russian. it was doomed to join other reasons like kashmir and others. crimea believes it will not share the same fate as the

economically stumped territories. >> translation: crimea is an integral part of the russian state. we are part of a big great country. >> for the crimean issue to be resolved. someone will have to change their tune. russia has to hand it back or ukraine and the west must swallow their objections and recognise it as russian. neither of these seems likely right now. russia's president vladimir putin signed a treaty to bring soth ossetia under control. it broke away from georgia after a 5-day war. it will be easier for them to become russian citizens. >> two australians convicted of drug trafficking in indonesia will not be executed this month.

a court postponed the appeal hearing for myuran sukamaran and andrew chan. lawyers are requesting a presidential clemenciment they were arrested in 2005 as part of a so-called bali nine group, due to be executed by firing squad. thousands of demonstrators marnaled through core abbingize. many rallying were government workers linked to the state oil and utility companies. the u.s. issued sanctions against seven officials over the crackdown on the last year's aunt government protest. nicolas maduro accuses the u.s. of plotting to off the him. >> brazil's president announced a series of measure to crack down on corruption coming on the same day that polls shoffed dilma rousseff's popularity is falling

falling . adam raney reports. >> reporter: responding to a wave of protest. dilma rousseff announced a series of anticorruption measures on wednesday. if passed they'd be barred from running criminalized slush fund and allow for the seizure of assets. >> translation: we have to open our eyes wide and say the time to put an end to this process, these crimes or practices - that continue to corrode the insides. the time is now. >> reporter: the announcement coming on the same day that polls showed dilma rousseff's popularity falling to a low. according to a poll 62% of respondents said dilma rousseff's government was bad or terrible. that's the worst ranking since 1992 when the president was impeached for corruption. on wednesday, there were fresh

protests against dilma rousseff in several cities. >> dilma is a manipulator and is manipulated by the former president. the workers' party can't continue in power. >> her popularity crashed amidst a widening scandal petrogas. prosecutors linked dozens of politicians and members of dilma rousseff's workers party to bribes and kickbacks worth hundreds of millions of dollars. last sunday dozens of protests were held across brazil in which more than a million marched. many called for her impeachment. meanwhile, pro-dilma rousseff protests attracted a few thousand people. sierra leone's president sacked his deputy after he was kicked out of the ruling party.

the president says that he abandoned his duties after he tried to seek asylum in the u.s. he was expelled from the all-people's congress party on march the 6th after being accused of inciting unrest. security forces took control of his compound in the capital. >> villages and former rebels in senegal came together to protect their markets. very this report on saving trees in southern senegal. >> reporter: a 200-year-old tree cut down in less than an hour. this was a sacred forest to the people here. one that their ancestors protected, and in this region of senegal it's a symbol of time ancestry and identity. the dead tree is about omen.

>> it breaks my heart. many cannot live without nature. >> it's illegal to cut them down without a government permit. >> no one is here to enforce the law. the region has been fought over for 30 years, a deal between separatists and the government was brokered years ago. it's difficult to know who was in charge here. ali hyder believes he was removed from his post because of a black-market destination. >> translation: enabling gambia is forbidden to cut wood but the country exports large quantities of timber all comes from senegal. we'd like to announce the trips carrying timber to gambia. they know it's illegal. it's a huge international

network in way gambian and european and asian traders profit. the u.n. estimates the global trade to be worth between 30 and $100 billion. the damage is too obvious to ignore. >> an unlikely alliance of villages and former rebels that fought the army are joining forces to protect this land. they patrol watch. they replant the forest. forming is the way to tackle the trade. >> when forming, there's someone on the ground keeping watch. it's a nonviolent way to tell the smugglers to back off. the loaned is ours. the project is small, the ambition is big. it may take years for the trees to grow. they believe they have planted the seeds to save the forest.

>> pilots from the german airline extended a strike that has seen hundreds of flights cancelled. they walked off over a dispute involving pensions. the flight continues through until friday. it's the second time in four months that they have been forced to ground flights due to strike action. >> it's an appealing vision of the future. instead of having to do our own chores and go to work every home do have a robot to do it for us. as reported, that could leave people without a job. >> this is not a story about how one day robots may kill us all. it is a story about how robots may take our jobs. this is herb the home-explores butler, he's here to help us. >> we are looking at putting herb into the home with the elderly community, and extending

independent living. >> it's a comforting vision. robots enhancing a quality of life. productivity spread across a population having leisure time or working in areas as a result of technological advances. that's not how it works out. >> it's true that job categories are announced. we can innovate them fast enough. >> a study by researchers at oxford counselled robots and artificial intelligence could replace half of all jobs in the u.s., from transportation and logistics to administrative and service industry jobs. carnegie university led the world in testing several autonomous robots that roamed the campuses corridors without supervision. they are cobots or collaborative

robots. >> show me the louvre or take me to the radiologiy department at the hospital or where exactly can i by this in the supermarket. they are very like good executors, helping you a lot. >> depends who owns it. >> yes, and when i get out, and say thank you. >> the eftenl control of the machines is the key issue for those studying the social implications and the profit motive corporations have in investing in this technology in order to replace us. so they look at teaching communities to master the technology. >> we under the problems and teach them to design new technology helping them to change the relationship they have, so they are not any longer victims, but inventors of the future.

corporate america is not going to council that. now they need our help for example, to use an elevator. perhaps this is a good moment to work out guidelines on how we'll all share the world. >> keep up to date. this is tech no . this is a show about science by scientists. tonight, techno journeys into the jungle. this is one of the iconic animals of costa row