north korea threatens to fire strikes. water contamination tops the agenda as hillary clinton and bernie sanders square off in the u.s. debate in michigan.

>> reporter: i'm in north-east ind ind india researching climate changchange turkish and e.u. leaders are in braufls. the 28 e.u. states are expected to ask turkey to return the thousands of migrants who do not -- are not eligible. a collective e.u. responsibilities requires fast and efficient mobilization. the commission has reposed millions in aid to deal with the issue. the immediate relocation of thousands of refugees stuck on the border with macedonia.

>> translation: since idemeni has closed, it has to become completely clear that the immediate start of a process of relocation of refugees from our country to other states of the european union is a matter of the utmost urgency and this is exactly what we seek on monday at the emergency summit our correspondent sent us this report. >> reporter: it has become the symbol of europe's failure and disunity when it comes to refugees. the border remains more closed than open. the latest system to cross into macedonia depend on the day arriving here. these arrived on 17 february. this the day after.

>> translation: my son took the trip and it took him ten days to get to germany. >> reporter: the fields here have become a place of hardship and frustration where people roam around for answers. over the past three weeks the camp was to support 1500 people to a huge amount. the long kwoou on the right is for food. the area of high extension is to the north. a double fence separates both countries. the macedonian side empty except for security forces. the greek side is more tense and anxious people. it is in the middle of this that this boy and his parents have pitched their tent. all five of them sleep in this

space >> translation: it's not fair. not fair >> reporter: perhaps there are no better words to express how most people. >> i'm very sad. >> reporter: why? explain it to me. >> we can't get anything. the smallest needs of life i don't have. even drinking water i don't have. i just know who doesn't offer the water. i don't have anything. if you must live here so they can feel what we are having. i would like to get thrown like this. nowhere cares >> reporter: about a third of those stranded here are children below the age of five. the people here are now waiting for the e.u. summit with turkey to announce clear guidelines about their future.

political leaders are hoping that the cessation of hostilities in syria will hold. for those here it is too late at least 25 refugees have drowned in the aegean sea trying to reach greece. their boat sank and 15 people were rescued. the coast guard is searching for more victims north korea has threatened to launch nuclear strikes against south korea and the u.s. in reaction to their yoint military drills. the exercises are set to begin on monday. tensions on the peninsula have heightened since the nuclear tests in january and the testing of a long arrange missile aisle in february.

these drals have gone in the past despite the hefty rhetoric from north korea. how concerned about this? >> i'm not. we have to assume that we're dealing with - these are very hostile entity here, but still they are irrational. they're trying to fight and win the war. in terms of rational ultimately, we can see a balance here. even though this rhetoric, i'm not concerned here. they've been doing it for the several decades. so we're used to it and there are no serious reason to be concerned washington and seoul have always said that they're defense ich in nature, but doesn't north korea have a point when they say that talk of decaptation and

strikes hardly sense defensive. the language coming from south korea and the u.s. is not exactly defensive. >> this is a very special situation here. here there is a small minority expressing some concerns of whether this is heightening the tensions only. i think that kind of view will be warranted or have merits only if this country that we are dealing with, north korea, is a country that continues to express desire for peace and prosperity for their people, which is not the case, and if they're talking about just a regular conventional war, a convention military build-up, which is not the case, and also if we're dealing with a country that is continuously expressing their desire for self defense, which is not the case. we have no other option here. they're continuously talking

about - you're mentioning their option of first strikes. we will have to exercise for preparing for the option of exercising our right to the pre-emptive strike if there is a clear indication that they're ready to strike missiles to that thank you. very good to hear your thoughts. to the u.s. presidential race. contaminated water has dominated the latest debate. hillary clinton and bernie sanders went head to head in flint, michigan, where local water supply is polluted with led. >> reporter: the headline at the flint debate. the water in city is still contaminated with led.

>> president sanders would fire anybody who knew about what was acting and did not act appropriately. >> i know the state of michigan has a rainy day fund for merges. what is more important than the health and well-being of the people particularly children, it is rainy led in flint. >> reporter: flint's water became tainted with led when officials switched the water supply to a more contaminated source to cut costs. it is only the issue plaguing the state. the sta state have lost tens of thousands jobs. bernie sanders says hillary clinton supported it. >> secretary clinton has discovered religion on this issue, but it's a little bit too late. secretary clinton supported vir virtually every one of these trade agreements. >> if everybody voted the way he

did, i believe the auto industry would have collapseed taking four million jobs with it. >> reporter: hillary clinton retains the lead with almost three times the delegates. she already positioning herself as the presumptive nominee. ready to challenge the republican front runner >> as of last night, donald trump had received 3.6 million votes, which is a good number. there's only one candidate in either party who has more votes than that, and that is me. >> reporter: bernie sanders is way behind. that's why the upcoming contests is vital if bernie sanders wishes to close the gap for the

presidential nomination in iraq at least 60 people are known to have been killed in a suicide bombing on sunday. dozens more were wounded in the blast. >> reporter: the temperinger truck blew up at one of the busiest checkpoints on the main road. instead of fuel it was carrying explosives. there was almost nothing left here. i.s.i.l. took responsibility for the blast north of hilla, close to babylon. this is almost 90 kilometers south of baghdad. iraqi soldiers and police manned the check point. many of the other casualties believed to be civilians. >> translation: the blast has destroyed the check point and

its buildings. more than 100 cars have been damaged e we have strongly condemned the attack. >> reporter: iraqi security forces have driven i.s.i.l. fighters out of ramadi and recently recaptured hubs of kilometers of desert. as i.s.i.l. loses important territory, it seems to have stepped up its attacks on civilian targets. many iraqis will be asking how a truck full of explosives were able to make it that far along a road with that many check pointpoints some breaking news out of tunisia. soldiers are said to be under attack from fighters who sneaked over the border from libya. at least three attackers are said to have been killed. security forces are fighting an

armed group with rocket propelled grenades. the ipd tea of the attackers are unclear but i.s.i.l. fighters are based in nearby libya. what can you tell us about this attack that i understand is still ongoing? >> reporter: we're about 45 kilometers from there and i can tell you that heavy security on the roads near this strategic and important town for tunisia. we're hearing several civil yarnss have been killed in this attack. we understand from officials it happened on two or three prongs at the same time simultaneously where armed men attacked the army barracks which were close by as well as the national guard. now, we are hearing that the fighting is ongoing, not only just outside there but in and around the area as well. there is the sound the heavy

gunfire which people told us they're still hearing. this is the port part of tunisia. it is a-- important part of tunisia. last week there were around five people who were killed in another attack. they came across from the border and, of course, tunisia has built a wall along the border with libya, but that doesn't seem to have prevented the movement of what we see as armed attackers coming in from libya and targeting the army as well as the security forces for the moment, thank you for that. we will bring the latest as and when we have it. still ahead on al jazeera, we are on the philippines island where families are trying to pick up the pieces after a deadly attack. plus making music history. a popular american electronic

group gives a first free concert in the heart of cuba. stay with us.

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>> "inside story" takes you beyond the headlines, beyond the quick cuts, beyond the soundbites. we're giving you a deeper dive into the stories that are making our world what it is. welcome back. our top stories on al jazeera. leaders from the european union and turkey are in brussels for an emergency summit to tackle europe's worst refugee crisis since the second world war. anger over contaminated drinking water has been debated between the democratic presidential

hopefuls. more on the refugee crisis, our top story here. most of the refugees are arriving to the greek island lesbos. how many refugees are transiting through there? >> reporter: thousands are here already. just this morning they brought in 50, that is the first that arrived, 50 refugees from afghanistan. there have been a huge number

that are going further into trying to save the migrants and refugees from the boats. they are on the small dhingys. they're taken by boat to athens where they joint of 2,000 others stranded in greece. they are living in public parks. they're living in children -- living where they can be kept we've seen in other areas there is, of course, a high-level meeting today in brussels between the european union to discuss this refugee crisis. are the people in lesbos that you've been talking to. are they hopeful that their misery will end after this meeting today?

>> reporter: yes. when you talk to the syrian and iraqi refugees here, they say that the meeting in brussels will bring about a situation where the borders are open and they can move forward to the areas where they want to live and seek asylum. when you talk to the other refuge refugees, they're a bit comprehensive about what could come out of the meeting because they're unsure whether they will be relocated. the greek prime minister is fuming. he says he wants - the only thing that greece wants is the relocation of the refugees and any relocation would be to turkey where most of the refugees originate from and to quote him, he says the e.u. is

feeling the consequences of unreasonable imdperialistic situation. the only thing that greece wants now is for the refugees who are stranded in greece to be relocated, saying that greece is not going to bear the burden of the entire e.u. thank you for that. grieving families are continuing to demand answers as the second anniversary approaches for the disappearance of the malaysian flight. many remember their loved ones in a memorial service. >> they can stop the search, but where do we stop the feeling of

loss? we have not got our family members back yet an islamic rebel group in the philippines is saying it is trying to stop the fight of i.s.i.l. i.s.i.l. is trying to recute fighters in the southern philippines. he is warning that i.s.i.l. can take advantage of frustrations felt by filipino muslims >> now after the passage, we are concerned that they can capitalise on this and because the sent metropolitan of the people in the area is now very strong, the frustration after the passage. they can capitalise on that and that is what we are trying to work staying in the philippines, thousands of displaced people on the southern island were slowing returning to their homes.

recent fighting there has threatened a fragile truce between . >> reporter: life is getting back to near normal as the troubled part of this country will allow. neighbors returned to their home. they come to inspect the damage and the mess and like this woman with a family to support collecting possessions. >> translation: my only concern is getting back into the house. we have a tyre repair business and it is the only source of income we have. i have seven children and i'm afraid for their future. >> reporter: she won't be moving back in yet. what was once a bust meddling community is now deserted. the philippine millitary says

the local armed group which launched the attack has allegiance to i.s.i.l. it points to graffiti and propaganda materials. also abandoned a makeshift workshop. more than 20 people, mostly tieding, were killed in the fighting. >> translation: all residents are traumatised especially the women and children >> reporter: mainly muslim separatists forces in the south have been fighting for independence for years. a peace according is meant to bring an end to hostilities was signed two years ago again them and the government. it was failed to be passed by saying analysts is leading to an increase in violence. familiars connections have been discovered. they have denied any involvement and a truce agreed with the army

still holds, but it is a truce that is looking uneasy. also putting pressure on the prees is the presidential-- piece is the presidential issues. it doesn't make for a happy or safe home coming to the people here india, in two years of ee erratic weather and clienting production is taking a toll on the industry in the north east. they produce 17% of the world's tea. over the past 100 years the minimum temperature has increased by 1.5 degrees celsius. at the same time the rainfall has dropped by 20 centimeters. >>

>> reporter: meet a professional tea taster. his job is to assess quality. but tea is subjective or whisky or wine, one man's drink is another man's poison. he says he has seen changes in his 25 year career. >> today you need irrigation, so that's an added cost >> reporter:. he has devoted his life to studying tea. he says global warming is having a serious effect on the industry. >> climate is impacting the activity in towns. secondly, the climate change is also impacting the quality. >> reporter: there was a time when these sprinklers were not needed, when the rainfall and sunshine were just right, but the tea plan is sensitive.

unlike annual crops which dominate our food system like corn, wheat and rise, tea is a crop grown all year around. up plant the saplings and you can harvest the leaves for 50 or 60 years. that makes it vulnerable to changes in temperatures and water level. >> reporter: a senior member of the fae board says unpredictable rainfall has forced tea gardens to install irrigation. >> we have become completely dependent on nature and if we don't have rain it is not good harvesting. you cannot get your production from irrigation. it is only from rain god, when there is rain generally you get good harvest. >> reporter: indians consume a third of all tea produced in the

world. nearly a billion tons every year. millions who depend on it for their livelihood are searching for a sign of two leafs and a bud huge crowds have turned out in havana to see the first american band perform since the u.s. and cuba assumed ties last year. our correspondent was at the concert. >> reporter: another sign of the changing times. young cubans here at the havana concert. it was built-in front of the u.s. intersection. today the american embassy

[indistinct] there is a new president both here and in the u.s. and things that bring the young generations of both together, like this music, are what is taking the center stage. >> translation: i've come to the anti impeerlist without caring what is behind it. i love electronic music. >> translation: it is something we've been waiting for, for a long time. thank goodness they've come. >> translation: i came here to enjoy the flow. >> reporter: all this less than 10 days before president obama comes to communist cuba for an historic visit,

tributes are pouring in for former u.s. first lady nancy reagan. plenty of news on our website at aljazeera.com >> this week on talk to al jazeera, renowned architect david adjaye. he's designing the smithsonian's national museum of african american history and culture on the mall in washington, d.c. >> i think that what the world will see is that the african american story is not a footnote, but probably the lens to really understand america, to this day. >> from a cancer treatment center in rwanda to an affordable housing project in