>> sharks like affection. >> "techknow". where technology meets humanity. monday, 6:30 eastern. only on al jazeera america. > the nigerian military rescues nearly 300 women and girls from boko haram. psh psh welcome to al jazeera from doha. also ahead - the saudi king names a new heir and replaces a foreign ministers in a major government shake-up. frustration in nepal as survivors of the earthquake wait for aid and relief australia recalls its ambassador to indonesia after two of its citizens are executed by firing squad

nigeria's army says it rescued nearly 300 women and girls from boko haram. they were found in the forest, which is the armed group's last-known strong hold. ynonne ndedge is live in abuja. first of all, clear up some issues for us here. who are these women and girls. >> well the military promise to release photographs and more details of the individuals. all we know so far is there's an ongoing screening and profiling process. they are the words that the military is using to describe what is going on to identify who the individuals are. late tuesday night nigeria's military spokesperson gave an interview to jazz, and he was probed about the identity of the

individuals, and he was probed but he said some of the individuals could be the wives and children of boko haram fighters. when asked about the like to chibok and the 200 or so girls kidnapped, he said because of that profiling process that is going on, the military are not ruling out the possibility that in the midst of the 293 individuals, there could be one or two girls from the chibok school but they are not sure for now and we are waiting for details and photographs that they say they are going to hand over to the media. thank you ynonne ndedge. saudi arabia's kaining salman announced a shake-up. nayef is the new crown prince. he's the deputy prime minister and the interior minister. his son is the deputy crown

prince, appointed defence minister and abdel al-jubeir replaces prince faisal, the longest serving foreign minister appointed in 1975. our correspondent joins us here. first of all the obvious question. why the reshuffle? >> sadly, this reshuffle does not come as a huge surprise. when king salman took over there was talk about crown prince mugrin assist someone who is not charismatic, and whose appointment by king abdullah was controversial even by members of the royal family.

we have heard talk in saudi arabia about if they are facing massive challenges it has to be reflected in a new spirit. this is a reason that motivated the need to see new young leaders taking over blrl mohammed nai eff and mohamed salman. >> we have seen the saudi policy activated in new ears what will al-jubeir bring to that. >> well he as you remember when he took over post 9/11, and he served for some time as a political advisors to king abdullah to someone with strong ties with different circles of power in the united states of america. you remember 2011 there was an attempt to assassinate him by team affiliated with iran.

this is someone who is going to bring new change in style and substance to the minister of foreign airs led by prince faisal for more than four decades. the narrative in saudi arabia - if you face threats from iran which has seen by saudis as taking over in different parts of the region therefore you need to have this reflected in the political establishment in saudi arabia. if you have someone likely to succeeded, and the deputy to the crown prince and minister of defense, also a young diplomat i think it sends a message that we are going to be hands on very aggressive. >> security and stability is a priority geep the lines. -- between the lines. >> yes in yemen, 12 houthis were

killed in fighting in aden including a local commander. the humanitarian situation is separate. residents of the city in southern yemen face a shorting of drinking water, food medicine. the number of sick people is growing. iran says it was unable to deliver a plane load of aid because the saudi-led coalition bombed the runway in sanaa. the coalition spokesman said the plane ignored a warning to turn back and the damage means it's unusable to all aid fights. scuffles broke out between police and protesters who are frustrated by the slow response. thousands camp outdoors in need of food water and shelter after the earthquake. 200 blocked traffic, chanting anti-governmentans

anti-governmentans -- anti-government slogans. we have this update from kathmandu. >> reporter: people have every right to be frustrated. it's been days since the quake hit. people in the capital have not received enough relief. they received a few tents. they are not in the open. water, food and medicine is in short supply. 1.4 million don't have enough food. they are in the capital, they don't have enough to eat. it is boiling over. they don't have enough to eat. it is boiling over. now, today we start three days of mourning here in kathmandu. and also the government admitted that they did drop the ball when the initial - after the quake first happened. now they are appealing to help not just for those buried underneath, but survivors who

need specialists from overseas - neurologist, orthopaedic surgeons, anyone with trauma experience to come and help those that have survived. those people are getting little relief. >> now, as we have heard, nepal's government has been criticized for the slow response to the crisis. andrew simmonds travelled to the himalayan foothills to see what is done it help those in the remote areas. >> reporter: it's an operation that only stops for refuelling and briefings. while the military may have been mobilized quickly, it's not enough to bring the relief the country desperately needs. beyond the sprawl of the capital is where the extra effort is needed most. >> from this altitude you can see just how inactionable the terrain is to the special forces rescuers. ltcol has a colossal job on his hands. perched on mountain sides, homes that have collapsed. the army says there would be no way of reaching anyone trapped

inside unless teams are wimped down from helicopters in hundreds of thousands of locations. here a mountainside disappearing in a mound of earth. the number of dead is unknown. this is one of further disasters in the wake of the quake and its aftershocks. the ltcol is defending his operation against criticism. he insists while many died, few are recognising or counting how many have been saved. >> one mi-17 helicopter of the nepalese army, if i'm correct, flew 68 missions on the day in a 24 hour cycle. pulled out over 370 people. >> landing at the town, it's not long before the commander saw his ground forces in action,

taking people to hospital that should treat 300 people. right now the figures are at just under 800. doctors admit the situation is at breaking point. this woman has a back injury, and travelled 100km for treatment. there's no beds, mats or trolleys. the hospital is overwhelmed. it's remarkable the doctors and nurses keep going, they have been working since saturday. >> we have to help them. we are left undamaged. we escaped and came to the hospital. >> reporter: the treatment starts on the streets outside. casualties keep coming in, people are injured when unstable buildings collapse, often because of after shocks. others have been travelling long distances for treatment.

at first sight, you would be forgiven for thinking the earthquake had only just happened australia has recalled its ambassador from indonesia after two of its citizens were ex cuted for drug offences. >> australia deeply, deeply regrets the executions in indonesia. they are cruel and unnecessary. cruel because andrew chan and myuran sukamaran spend some decade in gaol before being executed. unnecessary because both of these young australians were fully rehabilitate while in prison the execution by firing squad of seven foreigners and one indonesian went ahead. a filipino woman was spared at the last minute. we have this report near where the executions took place x

>> nine families from all over the world gathered at the indonesian port to leave for a prison island, for the last time before the executions. not long after, ambulances arrive with empty coffins. a grim sign that despite the last minute attempts from foreign governments to save the lives of the national officials here that made up their mind. indonesia support the death penalty, many criticized the government for insisting on carrying out executions despite legal flaws. >> we have corrupt judges and corrupt prosecutors. corrupt prosecutors.c it's the biggest issue, not about execution itself. i feel they, the government, uses politics to cover the bigger problems of indonesia, >> after a last visit relatives of mary jane prayed for a miracle. she was arrested in 2010 with 2.6 kilograms of heroin in her suitcase. the case of the migrant worker

from the philippines has led to protest, she maintained her innocence saying she was framed by a drug syndicate. her two sons and parents had returned from a tearful farewell when they heard the woman involved in recruiting mary jane surrendered to police. >> translation: my daughter is innocent. she went to indonesia, spent three days and flew to indonesia. she didn't know about the drugs. >> reporter: their prayers were heard. two australians, four nigerians and a brazilians faced a different fate. they were shot by a firing squad for drug-related convictions. the united nations urged indonesia to stop the executions, saying their crimes do not warrant capital punishment. the executions went ahead despite allegations of legal flaws and political interference. the government says it will serve as a strong deterrent.

the observers say they'll use it to show strength in a sign of weakness. president joko widodo continued the executions. previous governments had an unofficial moratorium. in january, six prisoners - a dutch and brazilian national - were executed. both countries recalled their ambassadors in response. indonesia says it is not worried about international repercussions. still to come - taken off the air, burundi silences a main radio station amid protests against the president. choked with pollution. south korea wants to cut emissions but is increasing its alliance on coal.

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get a first hand look with in-depth reports and investigations. start weekday mornings with al jazeera america. open your eyes to a world in motion. ia welcome back, let's recap the headlines. nigeria's army says he rescued 300 women and girls were boko haram. they were found in a forest the arm's group's stronghold. saudi king salman announced a sheikh um naming a now crown prince protests in nepal, frustrated by the government's response. many thousands are sleeping in the open in need of help. >> the death toll is above 5,000.

the u.s. city of baltimore is under curfew. there has been protests against police brutality after the death of a black man. freddie gray's neck was broken whilst in police caste. gabriel elizonda has more. >> reporter: police used pepper balls and smoke cannisters to break up a couple of hundred people who broke the curfew. despite brief scenes like this the majority heeded police warnings to stay home and rioting seen on monday was not repeated. the streets of baltimore are calm. earlier, the sound of gospel in the streets. in baltimore opportunity and hope don't often knock on the doors. jobs are scarce, black unemployment double that of whites.

and the riots doing nothing to help the economic situation. this is a poor neighbourhood, one that needs economic development. businesses are closed and locked, and on the other side of the street, riot police are in force, and the national guard militarized the streets. residents say the police presence way keep the peace, it's not the help they need. they need jobs, opportunity and hope. it's a familiar call heard before after recent killings of black men by michael brown in ferguson, missouri to the shooting of 12-year-old tamir rice in gleeveland and other cases. americans have to pay attention. >> all that requirements everyone to say this is important, this is significant. and that we don't just pay attentions to the communities when a cvs burns. >> in baltimore leaders like

christopher brown focus on solutions that can only come from within the community. >> we need to open up schools, after school activities resources to empower the people. >> reporter: on the streets they are taking no chance and bordering up windows. around the corner they continue to sing in a city where everyone knows what is broken and now they are looking to fix it the situation in the central african republic is becoming the largest forgotten humanitarian crisis the warning from the u.n. refugee agency that says 900,000 have been driven from their homes by fighting in september 2013. 2.7 million were in need of humanitarian aid the election commission says the president has won a third term.

professional results suggest that he got over 70%. the opposition secured under 35. his family ruled the small west african country. the opposition is complaining the widespread ireggulations burundi's president says he will not back down in a bid for a third term in office. protesters have taken to the streets. a popular radio station was taken off-air, social media blocked and journalists threatened. malcolm webb has more. >> reporter: covering the protests comes with risks. this man sells the video he films to tv stations and international press agencies. on monday the government closed the country's most popular radio and turned off transmitters.

journalists are worried about their freedom to do their work. >> this is a sign that the government is turning its back on the free press. throughout the country there is only media created by the ruling party. >> the radio station is crucial at a time like this. police in the city are depending on them to know where the protests a clashing. the government depends on it to know what the politicians and activists are doing. it's the main form of mass communication in burundi. it's normal to see people glued to radio sets when the news was on. radio african republican was widely loved. sunday, when the government officials came to its headquarters to close it, a crowd gathered in the street to object. government officials left. the next day, security agents closed it. the government says the live broadcasts from protests was threatening public safety.

this independent radio is on air, but only in the capital. management here are worried that it may be next. the newsroom has it's been a hive of activity since protests started on sunday. journalists say they have been threatened by armed members of the army. >> some people from the ruling party have taken to silencing anyone that can provide voice to say no. the people of independent media. >> journalists and audiences are used to a greater level of press freedom and are unlikely to let it go easily. like many. they are defiant. >> if the police beat me, i do not care. i'll stay on the ground to cover

what is happening, for the world to see. it inspires me to do the job. >> political tension shows no sign of easing. many are worried about what may happen to the burundi press. in mexico protesters attacked the education department. demonstrators threw fire-boksbombs and forced their way into the capital. they are angry at those reforming the system. many are from the college many went missing from in guerra former inmates of guantanamo bay prison are protesting outside uruguay, sleeping in tents and demanding compensation from the american government for the time they spent in gaol. the men accused the uruguay authorities of breaking

promises. >> reporter: this was not the way it was supposed to be. these men arrived in uruguay five months ago to recover from the nightmare. never charged with a crime, to begin new lives in an unknown land. overcoming the nightmare and adapting to a life fraught with difficulties. >> nothing has changed. that's why we are here. nothing has changed. we have had enough. we have been promised a lot of things and these promises came true. >> four of the six men have been camped outside. >> they should give us like, at least some of the years from us they took 13 years. they should come with us for something. they can't bring us here and forget about us. >> reporter: the embassy is aware of the men's demands. >> the dents have bomb a symbol

of the desperation that these men feel. be trayed isolated frustrated. >> reporter: they say the uruguayan authorities let them down not providing adequate housing, and they are waiting for their families to join them. >> translation: we want to live as normal human beings in dignity, and feel like human being. >> reporter: five of the six men refused to sign terms offered by the uruguayan government leading to threats that housing aid would be cut. a negotiator says talks are under way to resolve issues. >> translation: it's a way of calling attention to express concern about the daily spects of their lives. it in no way constitutes a break down.

>> reporter: the men say they want to court but are still recovering by their ordeal and a moved by the generosity of the uruguayan people. >> the religion language is new, the culture. everything is new. >> reporter: it could be time before the nightmare is truly behind them south korea, china and japan are holding the first trilateral discussion on improving air quality, blowing eastwards, effecting south korea and japan. in seoul there's a growing awareness that much of the problem lies at home. >> reporter: 23 february this year was something else for seoul, the worst di in

five years. fine air borne particles at 50 times the world health organisation's safe level. when it's that bad, the main source of the problem is clear. pollutant laced dust blown in. dust that passes into the bloodstream can trigger heart problems and strokes. since 2012 the average daily air quality has been steadily worse, double the standard level, and the metropolitan government accepts as much as 70% of the problem is home grown. >> when you look at what is generated in seoul, it's mainly floating dust disturbed by human activity or vehicle emissions. >> reporter: the city has a plan to convert more buses from diesel to gas, restrict new cars to electric or hybrid. coal fired power stations is on the increase, this went from four to six furnaces, soon it will be eight. 13 new plants will be built in six years. what is happening is part of a decision to expand coal-fired

energy production at a time when seoul's air quality is worse. greenpeace took its message to the walls of the plant saying south korea should reduce not expand reliance on coal. >> translation: the world is moving to the trend. korea is going the other way, even though premature deaths is linked to it riding south korea is pledging to reduce emissions by 13%. burning coal would seam to work against reducing emissions. another the main objectives is to reduce emissions. this is a conflict of interest. >> reporter: for all the efforts local and cross-border to tackle

the problem, some may have to get used to living with dirty air for some time to come. . >> keep up to date with that story about pollution and the others that we are following here in al jazeera. head over to aljazeera.com, our web page updated around the clock. phil torres >> this is "techknow," a show of invo vasions that can save lives, we'll explore the intersection of hart ware and huge -- hardware and humanity. let's check out the team. marita davison is specialising in ecology. tonight, what are the scientists at monsanta up to. we go into their lab.