warning against complacency. world leaders agree that stock piles of nuclear material needs better security. you're watching al jazeera live from our headquarters in doha. also coming up, south africa's president apologizes for using funds to renovate his home. honoring the victims of a campus massacre. the university in kenya marks a somber anniversary.

a japanese electronic giant has a foreign owner for the first time. we will tell you about the multi billion dollar take over of sharp world leaders have ratified a treaty to keep nuclear material safely under lock and key. during a nuclear security summit in washington 102 delegates made a pledge to have protocols in place for nuclear material. >> reporter: an international treaty requires countries to do more to safeguard nuclear material is about to take effect. u.s. president obama warned miss fellow leaders more must be done. >>-- his fellow leaders >> there is no doubt that if

these madmen ever got their hands on a nuclear bomb or nuclear material, they would use it to kill as many innocent people as possible. obama's warning comes weeks after the i.s.i.l. attacks in brussels and amid reports the suspects might have been spying on a nuclear scientist. some anti nuclear activists say the u.s. may have be focused this summit on the wrong threat. they want more cuts in the number of nuclear weapons in the u.s. and russia. they don't want north korea to become a nuclear state. that's a matter obama discussed with his chinese, japanese and south korean counterparts on thursday. some analysts say the administration has tried not to choose between nuclear security and nonproliferation. >> civilian nuclear material is found in far more states than just states with nuclear weapons. about 24 countries have material that could be used for a nuclear weapon.

so what president obama did was really elevate political attention to these materials and proi political momentum for securing them and ideally eliminating these materials. >> reporter: this is the final summit of its kind, so what happens now? >> today we agreed to maintain a strong architecture, including through the united nations, the international atomic energy agency and interpol to carry on this work. >> reporter: the real test of the summit's success will be whether nations continue their washing on safeguarding their nuclear material without a nudge from the white house north korea says it will continue its nuclear and ballistic weapons program. south korea says the north fired another short-range missile on friday. a north korean official says the peninsula is now in a state of semi-war. pyongyang says it will not tolerate searches of its ships under new sanctions imposed after its nuclear it tests some

january. south africa's president says he did not act dishonestly in using public funds to renovate his home. he agreed to pay back some of the money following a rule by the country's top court. >> reporter: the country's highest court sdifrd the final damning word on the president and the national assembly, both breached the constitution. it ordered the president to repay the state coffers for home improvements unrelated to security. things like a theater and a swimming pool. in a statement broadcast live to the nation, the president said the gross over spend should never have happened. >> the matter has caused a lot of frustration and confusion for which i apologise on my behalf and on behalf of government. >> reporter: but he defended his actions saying he had always

intended to pay back the money. >> i respect the judgment and will abide by it. i have consistentlily stated that i would pay an amount towards the non-security upgrades. >> reporter: he was dismissive of the demand he repay some of the money spent on upgrading his sprawling rural home. the country's corruption watchdog investigated after costs ballooned. the public protector said he should repay a portion of the 16 million dollars spent on non-security features, but he dismissed the findings and the government issued several reports that exonerated him from any wrongdoing. at the start of the constitut n constitutional court hearing the president did a u-turn acknowledging he did owe some

money. that's not enough for his biggest critics. the economic freedom fighters say they will force him from office. they're encouraging people to take to the street. the democratic alliance want him to resign and they called his address to the nation contradictory and insulting. they may not have won his resignation, but they have a lot of ammunition ahead of this year's local elections. the anc has wholeheartedly backed the president and thanked him for humbling himself with an apology. events of the last few days underscore the dominance of the anc which still enjoys the support of the vast majority of south africans although the president and party are under unprecedented pressure the u.s. says it has killed an i leader of the group al-shabab in somalia. he was one of three people killed south of jilib. the pentagon says he was involved in two attacks in the

capital mogadishu more than a year ago, one at the airport and another at a hotel. kenya is remembering one of the worst attacks by al-shabab. it has been a year since masked men stormed the university killing over 140 students. many are still afraid to go back to school. malcolm webb reports from the school in northern kenya >> reporter: these students ran away or hid when dozens of their friends were shot and killed. mercy lay under her bed for more than 12 hours. it was a year ago when attackers from the somali armed group al-shabab stormed their dormitory at garissa university in northern kenya. >> reporter: i'm a journalist. >> reporter: we spoke to her on the phone just outside the campus during the attack. now she told us the full

harrowing story of how she was killed. >> she was pregnant, seven months. so i guess it was labor pains. she started crying. that's when they realized there was somebody inside the room, so they went direct to that room. >> reporter: more than 140 students were killed. the attackers came from this direction and they found students sleeping here inside the girls' dormitory. it was here most were killed. mercy was hiding inside throughout. there were only four police guarding the campus at the time. many wonder if the attack could have been prevented. >> reporter: the former principal says it was an obvious and vulnerable target. he showed us letters sent to the government in the months before the attack requesting more security. he says they were ignored. he says the attack was a disaster for a region that's already poor and marginalised

>> it has left fear and suspicion between us. literally we are in a quagmire. >> reporter: the additional security finally came late last year. there are now 25 armed police on the campus. security in the whole of the northern region has improved. in january the university reopened for part time students, mostly from the found. university staff are hoping hundreds more from all over kenya will feel safe enough to come and start courses in september. mercy and her friends practice a son from a memorial ceremony. they were transferred to another university in another part of the country. they say they never want to go back, but they say they will never forget what happened that day or the friends they lost. malcolm webb

a large fire has damaged parts of the university campus in the will philippine capital. it took firefighters about an hour to put out the flames at the university. officials say welding work in the building may have caused it. there are no reports of injuries. syrian state media reporting the discovery of a ms grave in the city-- mass grave in the city of palmyra. it is said to contain the remains of at least 40 people. most of them women and children. i.s.i.l. reportedly killed 400 people when it took over the city last may. government forces took back control last week forcing i.s.i.l. to retreat. the p.k.k. says it was behind the car bombing in turkey's south-eastern city. seven police officers died and at least 27 others were injured. our correspondent reports. >> reporter: the explosion shattered the calm of this

residential neighborhood. a car packed with explosives detonated here. the damage is clear. this family is shocked. they survived the attack. >> translation: my parents were cooking in the kitchen. i was in the bathroom. my children were studying in the living room. all of a sudden with a powerful explosion we felt the storm and saw something very strong coming on to us. it was like an apocalypse. >> reporter: many onlookers stood in disbelief. many more scared. >> translation: we heard the explosion. we thought it was an earthquake. we were worried and scared. >> reporter: the car was parked here and it was detonated by a remote control once the mini because arrived at this corner. the explosion was so powerful it shattered the windows of the surrounding buildings. security officials say they have identified the man in this cctv footage as the main suspect.

turkey ask increasingly being targeted. last month a suicide attack carried out by an i.s.i.l. suicide bomber killed several tourists in istanbul. both ar can and-- ankara and istanbul have seen spikes in attacks since last year. several kon sul eights-- consulates have closed their missions and have warned their citizens of visiting the country, especially south-eastern turkey. the bomb will only increase fears of more attacks more from the philippines coming up in a moment and there's anger in a drought hit region there as police confront thousands of protesting farmers. also ahead, the top colombian restaurant that is serving up solutions for former rebel fighters. fighters.

"that's it, i'm finished."

the top stories on al jazeera. u.s. president obama said 102 nations have signed a treaty aimed at preventing armed groups like i.s.i.l. from obtaining nuclear material. south africa's president faces a flood of calls to resign after he has been ruled to repay

moneys for his home manufacture foxcon has finalised its take over the japanese electronics giant sharp. it is the first ever foreign take over of a major japanese electronics firm. the deal was signed and sealed with a handshake between the two chairmen. pe they'd 3.5 billion dollars to acquire a two-thirds stake in sharp. they assemble most of the i phones and want to expand into the market for next generation displays which sharp makes. >> today ask an important day for the companies. this is a case of a one global company investing in a company because we know we can compliment each other with our

own unique resources and then succeed together let's speak to a professor at the school of management in information in the university of shisuoka. how exactly did foxc on onn secure this deal, 2.5 billion dollars lower than was put forward to sharp back in 201? >> i think what happened was sharp wasn't concealing it, but they were rather delayed in informing some of the negatives that were under the carpet. they showed signs of back off which drew a good deal, not only from stharp itself but from the banks, especially like the likes who were backing up sharp overall how significant is this that this is, in fact, the first foreign takeover of a major japanese electronics firm and

could this be a sign of things to come? >> i hope it is a sign of things to come because what we really lack in japan is diversification in management style. it is the first time in the industry, but people portray japan and electronics are basically the icon, but unfortunately if you look at electronics, the domestic sales or domestic production in japan of electronics have more than halved compared to 15 years ago. they're not really a japanese icon any more. there should have been a lot more foreign introduction that we should be witnessing as we speak what are foxconn's plans with sharp? what will they and what will sharp get out of this deal? >> sharp is a per pet ewation of their business-- perpetuation. the other company will get a brand name of sharp which,

obviously, is extremely strong and they can utilise that strength. they can also get the technology of sharp which they have stacked up over the years how will they utilise the strength? what are their ambitions with the company? >> i would assume that what they can do and also other companies is unify the technology of existing companies and actually utilising distribution market all over the world. a good example of that is the take over against nissan back in 97 which was virtually a bankrupt company. you can utilise the existing name, existing technology and use your distribution base to widen your product base by using these japanese companies we thank you for joining us on al jazeera two people have been killed in the philippines during a

demonstration by farmers. they were demanding financial help and food aid after months of dry conditions. dozens of people, including 23 police officers were injured in the violence. our correspondent has the latest in southern philippines. >> reporter: a standoff [protesters mainly comprising of farmers and their supporters and the police authorities continue, here in central area. on friday we saw skirmishes between the protesters and the police as the police tried to move them away from the highway. two are confirmed head and dozens injured in hospital. a search warrant was issued on the church authorities because the protesters and the farmers, who are the large majority, about 4.5,000, are situated in the church compound. the police want to make sure

that there are no firearms in the area. so with senior church figures and senior politicians from the local area, there was a search of the location. nothing has been found. both sides accuse the other of starting the firing on friday which led to those two deaths. at the moment the standoff continues. the protesters, including the farmers, say they will not leave the premises medical their demands are heard. their demands are to get relief aid that wasn't available to them when this drought continued. there has been continuing now in the area for many, many months. there was supposed to be aid given in january. nothing has been given so far. very little and that's what these farmers are protesting about. they want the authorities to do something. this is causing great anxiety to central government in manilla in the lead-up to the general election in zimbabwe the government has held talks over compensation for evicted white landowners and

is hoping to win back international investment for the struggling economy. the government says it might raise the funds by taxing black farmers who benefited from the lapped seizures. over 16 years around 5,000 white farmers were evicted as a result of the president's land reforms. more than a dozen were killed in the violence that came with the land grabs. the defense ministry says heavy fighting has ground out between forces in karabakh. it is cloektd between two areas. it has been under the control of local forces since the fall of the voef yent union. the fighting over the past 24 hours is said to be the worst since the ceasefire agreement ended a three-year war in the 1990s. they have continuously demanded a return of territory but mediators have not been able to find a peaceful solution.

the u.n. security council has agreed to send u.n. police to burundi. options for the deployment will be presented within 15 days. the country has experienced unrest since april last year. that's when the president decided to seek a third term. nearly 500 people have been killed and more than a quarter of a million have fled to neighboring countries. >> translation: france is convinced that the security council must do everything it can to help burundians to resume their travel down the path of peace. this is our possibility as the security council and to the people of burundi it has been five years since ethiopian engineers began a giant hydroelectric project, but disagreement over safety, irrigation and political stability has delayed the grand dam. a report from guba >> reporter: it is costing more than 4 billion dollars of the

ethiopian taxpayers' money to build. when completely, the grand dam on the blue nil e is expected to generate 6,000 mega watts of power. it will be used domestically and sold to the cups in the region and beyond. convincing some neighboring countries of the benefits remains a major challenge for the ethiopian government. the reservoir when filled will sprech around 240 kilometers in that direction and the water level will come up to around about where i'm standing. the surface area of the reservoir is expected to be around 1,800 square kilometers. the construction of this project is posing some serious geopolitical questions for countries in the region. downstream countries, egypt and sudan, are especially worried that if this reservoir is filled too quickly, it could seriously diminish the flow of the river >> reporter: the blue nile has recently been diverted back to its original path to flow

through these culverts. the flow has not been affected. it has vowed not to fill the reservoir during the dry season, but the egyptian government is afraid that restricted water flow could increase already high levels of salts in the nile dealt a, an area which egypt depends on. government leaders in sudan fear for the safety of the main dam and the saddle dam. >> the sedimentation, we're tearing out-- carrying out all the tests necessary and while progressing these projects in a professional manner. >> reporter: an agreement by ethiopia, sudan and egypt was signed a year ago pledging to increase cooperation over the dam, but it wasn't until last december when an agreement was reached on which two companies would conduct their own studies.

>> this would be studied by an international consultant and including also how to fill the dam, when to fill the dam and what will be the impact of the varies options of filling the dam on downstream countries. >> reporter: despite the agreements, some academic and political figures in egypt have called for the destruction of the dam. >> they don't understand the development needs and rights of other countries. we should all respect all the concerns of all countries. >> reporter: completion is expected in the next three years, but building trust amongst companies which ethiopia says will benefit from one of the greatest engineering projects in africa's history could take a lot longer than that hundreds of anti-government

protesters in brazil are demanding the impeachment of dilma rousseff. demonstrators marched calling for early elections. she is kuchd of manipulating government accounts to win re-election in 2014. they're due to vote in two weeks whether she should be impeached. an upmarket restaurant in colombia is bringing together people who were once enemies in the heat of its busy kitchen. the restaurant started off by hiring unemployed army veterans, but its owner was persuaded to go one step further. >> reporter: this is one of latin american's top 50 restaurants. for the past eight years it has been serving more than fancy food. it offers training and employment to wounded army veterans and now to former rebel fighters. >> translation: a prospective employer wants to know your experience. as a former rebel what can you

answer? here i didn't have to lie. >> reporter: she escaped the farc four years ago. she never recovered. she left her home town after threats and couldn't find a job to feed her children. when a government agency connected her with this restaurant, she worried about not being able to work in a restaurant and feared working shoulder to shoulder with her former enemy. >> translation: when i saw him for the first time, i had the shivers. i didn't know what his reaction could be. that same day we talked and i cried and since then he has been my support. >> reporter: her colleague lost his left eye and right leg to an farc land mine. >> translation: my first reaction was hash. it was hard for me to accept the idea. we shared our stories and i understood they were victims as well. it helped me to move on >> reporter: the foundation originally mired former soldiers. hiring e rebels was a bigger

leap. >> there was fears, of course, about political opinion and security issues. in the end we set if we don't do it, no-one will do it >> reporter: the kitchen has become a symbol of colombia's efforts to overcome its conflict. but getting other entrepreneurs on board is an uphill battle. >> translation: we have an issue of stigma tiesation. it is not enough for the government to create opportunities, train these people and show responsibility if the moment they face a society that is not ready to receive them. >> reporter: back at the restaurant, workers know a restaurant alone is not likely to reverse decades of fear and distrust, but they're convinced it might just hold the key to a recipe for reconciliation

archeologists in egypt have been using radar technology to scan a hidden cavity between king tut's tomb. they believe it could be a burial chamber housing the remains of his mother. no-one is sure where she is buried. this week on "talk to al jazeera" sinner song writer natalie merchant >> i stumbled into this as a way of life. i had no intention of being in a band or a singer. it happened to me by accident she has rerecorded her break through solo album tigerlily, but this time with a tw