warning against complacency. world leaders agree that stock piles of nuclear material need better security you're watching al jazeera live from our headquarters in doha. also coming up, commemorating a somber anniversary in kenya. demanding relief, farmers in the philippines take to the streets

calling on the government to help them. plus. >> reporter: i'm in cambodia where the united nations says thousands of children in orphanages are, not, in fact, orphans world leaders have ratified a treaty to keep nuclear material under lock and key. 102 nations made the pledge to prevent nuclear terrorism. obama warned the threats posed by groups such as i.s.i.l. trying to gain access to nuclear weapons. >> reporter: all smiles at the end of the nuclear security summit in washington and for good reason. an international treaty that requires country to do more to safeguard nuclear material is about to take effect. president obama warned his fellow leaders more must be

done. >> there is no doubt that if these madmen ever got their hands on a nuclear bomb or nuclear material, they most certainly would use it to kill as many innocent people as possible. >> reporter: obama's warning comes just 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 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 t that's a matter obama sdaufd with his chinese, japanese and south korean counterparts on thursday-- discussed. some say the admission strayings has-- administration has tried to choose between proliferation. >> it is found in far more states than states with nuclear

weapons. 24 countries have material that could be used for a nuclear weapon. what president obama did was really elevates political attention to these materials and provide political momentum them for securing them and ideally eliminating the materials. >> reporter: this is the final summit of its kind. what happens now? >> today we agreed to maintain a strong architecture, through various agencies, to carry on this work. >> reporter: the real test of the summit's success will be whether nations continue their work 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 nuclear war. pyongyang says it will not

tolerate a test of its ships. south africa's president say he did not act dishonestly in a scandal over the use of state funds to renovate his private home. he has apologised and agreed to pay back some of the money following a ruling by some of the country's top court. >> reporter: the country's highest court delivered 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 overspend 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: 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 consistently 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 on his 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 congress-led government issued several reports that exonerated him from any

wrongdoing. at the start of the constitutional court hearing, the president did a u-turn, acknowledging he did owe some money, but that's not enough for his biggest critics. the economic freedom fighters say they will force zuma from office. they're encouraging south africans to take to the street. the opposition democratic alliance want him to resign. they called his address to the nation contradictory and insultingsing. they may not have won his resignation but they have a lot of ammunition in this year's elections. the anc has backed the president and thanked him for humbling himself with an apology. the anc still has the support of the vast majority south africans although the party and the president are under mounting pressure the u.s. says it has killed a key leader of al-shabab.

he was one of three people killed in day drone strike south of jilib near the kenyan border. pentagon says he was involved in two attacks more than a year ago, one at the airport and another at a hotel in mogadishu. kenya remembering one of the worst attacks by al-shabab, it has been a year since masked men stormed a university killing over 14 po students. many still afraid-- 140 students. many still afraid to go back to school >> reporter: these students ran away or hid when dozens of their friends were shot and killed. mercy laid under her bed for more than 12 hours. it was a year ago when attackers from the somali armed group al-shabab stormed their university in northern kenya. i'm a journalist. >> reporter: we spoke to her on the phone from just outside the campus during the attack.

now she told us the full harrowing story of how her friend carol was killed. >> she was pregnant, seven months. 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 the bathroom and then they killed her. >> reporter: more than 140 students were killed. the attackers came from this direction and they found students sleeping here inside the girls' dormitory. it's here that most were killed. mercy was hiding inside throughout. there were only four police were guarding the campus at the time. the university's former principal says it was an obvious and vulnerable target. he showed us letters sent to the government in the month 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's let it happen. it has led to more fear and more suspicion between us so literally we are in a quagmire. >> reporter: help 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 garissa town. university staff are hoping hundreds more from all over kenya will feel safe enough to come and start courses in september. mercy and her friend practice a song for a memorial ceremony. along with most survivors 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 crossing over to malcolm from garissa university where that attack took place. malcolm, i assume a somber mood to that anniversary. >> reporter: that's right. the memorial happening here today, several dignatories have come. it is going to culminate with the unveiling of this memorial. it has the names of those who were killed. with he is the dean of the students here. are people here starting to recover from this? >> yes. we've recovered. it's hard to forget what had

happened in this area where innocent lives were lost, but life has to go on, but their memories will still remain fresh in our minds. we've done some counselling for the staff and as we are speaking only three staff who have not reported yet, but all of our staff we are full house and we will start with the continuing students and life has to go on. we are still teaching them the privately sponsored to show our enemies that the pain or medication is mightier than the gun. >> reporter: could the attack

have been prevented? >> sure. the attack could have been prevented, according to my understanding. first, when we had it, we tried to put intervention measures in place to ensure that the security of our students are safeguarded. one of the things that we've done is the principal, the ceo, has written several letters to t the county commissioner and police who was supposed to put security at the institution at which the answers are that they are over stretched. they don't have enough personnel and we are forced to work with the little that we have, and increasing the number of our guards. that is why we also at the

university decided to put in place a good fence sealing all the loopholes to ensure that no-one will try to have a threat from along the fence. these enemies actually approached from the gate, meaning our fence was intact. we have tried our level best, but now engaging the security guards that is what led to the access. >> reporter: thank you for that, the dean of students here, one year on from that fatal attack when 142 students were killed here malcolm webb reporting. thank you. coming up on the program, how badminton is making giant strides in india-obsessed india.

also cherry blossoms in japan. in japan.

the headlines on al jazeera. obama says 102 nations have signed a treaty aimed at preventing armed groups like i.s.i.l. from obtaining nuclear material. the u.s. says it has killed al-shabab leader via drone strike. he had been involved in two attacks in mogadishu more than a year ago. kenya is marking a somber

anniversary of one of deadliest attacks in the country. the university was stormed in northern kenya killing more than 140 students. the kurdistan workers party or 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. >> reporter: the explosion shattered the calm of this residential neighborhood. a car packed with explosives debt made here. -- 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 it and saw something strong. it was like an apocalypse. >> reporter: many onlookers stood in disbelief.

many more scared. >> translation: we heard the explosion. we thought it's an earthquake. we were worried and scared. >> reporter: the car was parked here and it detonated by a remote control. once a minibus arrived at this corner carrying police. 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 is increasingly being targeted. last month a suicide attack carried out by an i.s.i.l. suicide bomber killed several tourists in istanbul. both ankara andise tap bull have-- and istanbul have seen a spike in attacks since last year. several kon sool eights have closed their missions and many states have warned their citizens against visiting the country especially south-eastern

turkey. the thursday car bomb attack will only increase fears of more attacks syrian state media is reporting the discovery of a mass grave in the city of palmyra. it was discovered by government engineers aas they cleared thousands of mines left by i.s.i.l. the graves is said to contain 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 control last week causing i.s.i.l. to retreat. two people have been killed in the philippines after protests 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 violence. our correspondent has the latest from the southern philippines. >> reporter: the tense standoff

between protesters mainly comprising of farmers and spare supporters and the police authorities continues here. on friday we saw skirmishes between protesters and police as the police tried to move them away. two are confirmed dead and dozens injured in local hospitals. a search warrant was issued on the authorities because the protesters and the farmers, who are the large majority, have about 4,500 situated in the church compound. the police want to make sure there are no firearms in the area. 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 until their demandss are heard. their demands are to get relief aid that wasn't available to them when this draught continued. this draught 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 they are protesting about. this is causing anxiety in the lead-up to the general election vietnam's parliament has sworn in a top police man as the new president. he was the head of the internal security agency which has a controversial human rights record. his name was recommended by the ruling communist party in january. the post of the president comes seconds after the party seen as the country's top leader. almost 12,000 children in

cambodia live in orphanages, but a recent government study says more than 70% of them have at least one living parent. the government and the u.n. are trying to reunite the children with their families. >> reporter: it is the night before exams and this man is studying hard. homework, he says, is a privilege. he didn't start school until he was 12. after coming to this or fannage. he isn't an orphan an neither are many of the children here. >> translation: my parents send me to this center seven years ago because they had problems earning a living. they couldn't send me to school and we didn't have school. >> reporter: a recent study by the government found that almost 12,000 children currently live in or phages in cambodia but

three out of four of them have a living parent. the government and the u.n. are now pushing to return these children to their families. >> some of these institutions are actually not carefully monitored, they're not respecting minimum standards of care and what is very important is also that there are mechanism in place to inspect those institutions regularly. >> reporter: his parents say he is better off where he is. they say they can't afford to look after him. they earn less than $5 a day selling balloons on the street. >> translation: if he stays with us, he will have to work hard. my son will end up as a construction worker. >> reporter: staff at the together for cambodia or fan age say he has a chance for a better better future if he stakes with

them. -- stays with them. >> translation: we accept children who are at risk of abuse and violence. in this situation, if you send them back, i don't agree with that. >> reporter: both the u.n. and/or fannages say that the welfare of these children must come first, but the question is who can offer better care. the government has yet to regulate the children with parents must return home. organizations like together for cambodia are hoping it doesn't come to that hundreds of anti-government protesters in brazil are once again demanding the impeachment of dilma rousseff. demonstrators marched for calling for early elections. the lower house of parliament is due to vote within two weeks on whether she should be impeached.

top baddmindim players are battling it out. one is an olympic bronze medallist. getting national support is a challenge in the cricket-crazy nation. >> reporter: for many here badminton is just fun. only a few like this girl hope to make it a career. she started training two years ago. one day she wants to do better than her role model. >> i want to be a player because when i am eight years old, i decided that i wanted to take the gold medal. >> reporter: this is her inspiration practising at the indian open. when she won a bronze at the london games she became the

first ever indian badminton player ever to win a medal. all the world's top players are here. it is one of the last tournaments before the olympics but tickets are being given out for free. >> as we have more and more performers, more international performances, more champions, the popularity will go up. >> reporter: but capturing the public's interest has been tough, even though indian players are performing better than ever. this is the second-most played sport in the country, but it lags behind television viewership and so doesn't get the investments it needs. world double champion said there's little government infrastructure and financial backing for inspiring players >> the problem is that the support comes in after you

become a champion, but the support doesn't come at the initial stages of becoming a champion. >> reporter: she trains twice a day and her parents are footing the bill. they hope that it will pay off as the game's professional status improves and that sympathy too can one day become a household name it's cherry blossom season across japan and it coincides with record tourism numbers. it's a time when many engage in the traditional custom of an out door party. rob mcbride alooks at the excitement and the big business that the blossoms bring. >> reporter: it happens every year, so people shouldn't be amazed, but it is still amazing. across japan the cherry blossom is blooming and the whole country is gripped by hanam i.

quite literally, looking at flowers. coinciding with perfect weather, the verdict for this season is it's as good as it gets. >> translation: when they fall, it looks like it's snowing. >> translation: i'm glad i was born japanese. >> translation: it makes you happy and you forget all your troubles. >> reporter: pulling in the crowds is the knowledge that one bad storm could blow it all away. it is all the more beautiful for being so fleeting. and this could be the source of much of that beauty. it is one of a number of hybrids here at this park in northern tokyo that's more than 10 years old and that has been the subject of a recent university study. researchers believe grafts taken from this one tree could be origin of the most common variety of cherry tree that's in full bloom right now. sharing a common genetic

background would help explain why the cherry blossom comes with such certainty. no bad thing in a country which likes things to be precise. and invaluable for the tourism industry. tokyo district plans a festival around it, promoting its own cherry trees and her chan dieing-- merchandising everything. >> translation: we all get together to create an experience. >> reporter: at night-time blos ams are created-- blossoms are created where they don't exist. with a weaker yen and the upcoming olympics in four years time, the government sees tourism as vital for the economy. it had planned 20 million visitors per year by 2020 but it is already an achieving that. so now it's doubled the target to 40 million. better get planting more cherry

trees. rob mcbride just a reminder, you can keep up-to-date with all the latest news on our website. there you will find the top stories at aljazeera.com >> gang rape, among the most shocking of violent crime is stirring a global outrage. throughout asia, it is believed to be far more common than most people think. >> rape is a major problem in all countries across this region. >> women's experiences of violence are well documented, but the