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they say they have advanced warning about the raid on the girls school. and could the next generation of life-saving drugs lie underwater? we will show you how the new frontier could change treatments right around the world. ♪ >> welcome to our viewers on public television in america and around the globe. today, serious clashes in eastern ukraine. this time in the port city. bepeople, most believe to pro-russian activists, were killed after they tried to storm a police hel headquarters. the vladimir putin made his first visit to crimea since russia annexed it in march. we have this report from richard galston on the scene. believeswhich bbc shows ukrainian troops fighting

a pitched battle with pro-russian separatists in the center of the city. the military sending in reinforcements they say were needed to dislodge a group of separatists who had earlier occupy the police headquarters. hearing the gunfire, other pro-russian activists rushed onto the streets, trying to stop the reinforcements getting through. this man's venture into the road proved disastrous. chest.hot in the it's not known if he survived. at the police headquarters, the epicenter of the battle, evidence of the intensity of the fighting. or was no one left inside. left inside.no one this seems to be the most serious incident so far in this

city. there are still bodies on the streets, waiting to be taken away. this man showed me one of the bodies here. apparently it was that of a policeman. he was one of ours, he says. he was on the side of the people. the pro-russian crowds here says that is why the military attacked the police station. he claimed it had not been stormed by separatist rebels. this woman tells me only russia, no one else, can protect them. why hasn't president putin come here so far, she says. is nowinian military bracing itself for further fighting. there is a report tonight more separatist gunmen are heading towards the city. ukraine is moving ever closer to civil war. richard galpin, bbc news.

>> certainly looks that way. those clashes happening just as president putin was making a very public display of visiting the crimean peninsula for the first time since it was annexed from the ukraine in march for the u.s. state department calls the trip provocative and unnecessary. we have this report. putin, thet vladimir first russian leader in almost 70 years to expand his territory. asiving today in the harbor russian air force jets roared overhead in triumph, beaming live pictures to viewers across the world. it was the first time he had come here to crimea since he annexed the peninsula less than two months ago. i am sure that 2014 will be written in the history of the city and our whole country as

the year when the people who live here made a firm decision to be together with russia. >> then he stepped out into the crowd of tens of thousands of delighted residents, many of them now proud owners of russian passports. this is crimea's most russian city. it was a display of defiance by president hooton, -- president putin, coming here in the face of international opposition to the annexation of crimea, knowing full well that people here support at what he did. the united states described president putin's trip as provocative and unnecessary. today was a victory day in crimea and across the old soviet union. today, people celebrate the feet of nazi germany. in kiev, the victory day

ceremonies were much more somber. ukraine has lost crimea and the east is in flames. ago, we fought alongside russia. now russia has started the crisis against us. so history is repeating itself. in a different form. >> but tonight, with the russian warships lit up in the harbor, they were celebrating with who areoncern for kiev the mine doherty in crimea who wanted to be part of the ukraine -- who are the mine doherty in crimea who want to be part of the ukraine. display inssive crimea. former on the actions and events in ukraine, i spoke with retired general michael hayden. he was formerly with the central intelligence agency. iq so much for coming in, general hayden.

-- thank you so much for coming in. nato rejects the assertion, crimea is still part of ukraine, but it sounds futile when you look at what was happening on the ground. >> i think that's true. i don't want to be in the business of validating what the russians have done, but as a practical matter i don't think we see crimea changed hands again anytime in the foreseeable future. we will put those footnotes and all of our maps that say we do not recognize this change in borders, but for practical purposes, crimea is now russian. >> has president putin got what he wants and will stop there? >> he should be satisfied with this, i mean this really. he was humiliated by what happened in kiev, in a prison of his own making, the sochi olympics. he comes back, the one thing he has provided the russian people beyond anything else is a restoration of pride, the

restoration of the store grievances. what happened in kiev humiliate simples up he looks for something to regain his mojo, so to speak, he retakes crimea. he's got it. all the stupid pet tricks he could pull off, going to ukraine and beating his chest is probably offensive, but far less worse than any other thing. >> he must realize if he is looking out for the security of russian interest, then driving tanks across the border into eastern ukraine would totally defeat the purpose. >> again, not validating anything he has done, but it is an act taking ukraine. it crosses the border and starts churning up the black earth of eastern ukraine. >> in crimea, you mean. >> crimea, sorry. he has taken crimea, bloodless. from a professional point of

view, quite artfully. that does not happen if he moves across the border. he wins in 96 hours. history shows ukraine does not take kindly to occupiers. now he will have to live with the reality of russians coming home in body bags. he's got what he needs. i hope he understands all this theater along the border, those are his table stakes. that keeps him in the game, because the russians have legitimate and tristan ukraine. -- they wanted to intended to in future negotiations. he gets that with this posturing. i hope it is nothing more than posturing. the real danger is the pawns in odessa, the pawns now threaten to create and control the movement of the kings and queens. he has to recognize that is dangerous. it may explain why you have gotten this modestly more temperate attitude and language out of him the last 40 hours. >> does he still have control

over them when i go ahead with referendum. general hayden, thank you very much. >> today, a team of purdue security experts joint american specialists in nigeria to help search for more than 200 schoolgirls who were abducted by the boko haram last month up amnesty international says they have damning evidence not nigerian military received a warning there would be a raid on the school and failed to act. it is a charge the country boston from a in minister says he doubts but it will be investigated. reports now from abuja. we need our daughters, she says. if amnesty international is right and the nigerian army failed to act on the information it received, these families would not be suffering like this. those who were closest to the girls feel they have been badly let down. is experienced and

has plenty of local sympathizers. the nigerian army, by contrast, is not particularly efficient and is at a real disadvantage in the area. was one government minister's response to the amnesty allegation. >> doubt, because it's very outrageous if our security force that theved a report schoolchildren were going to be attacked. as soldiers on duty sent out there to defend cities, who are already making a lot of sacrifices to defend those cities, we will investigate this report from amnesty international. >> other allegations are starting to surface. the father of two kidnapped girls, a christian minister, just arrived. he believes teachers from the school were tipped off about the raid before hand. >> they have daughters who are ofll in there and none

their daughters were kidnapped because they had the information earlier and they sent away their daughters and left the rest of the daughters there. and then the boko haram came there. >> you think the teachers were in contact with boko haram? >> there was information that the boko haram was coming to the town. >> the girls were taken from their burned-out school to the vast forests, 65,000 square kilometers in size, which will be hugely difficult. foreign help the starting to arrive, but it is small scale. -- mayor khazar breat the americans are bringing in eight new advisers, there will be 10 x for british ones, but what hope is there? >> one hopes they will come back. it's possible that some will escape, some may find their way out in some other way.

however, the trail is four weeks old, the terrain is rough, and the tools at hand at the moment are fairly limited. pastne of boko haram's attacks have affected nigeria like this one. some people feel their best hope will be that boko haram will feel so pressured, they will just let the girls go. the world is now watching what happens in nigeria and to those young schoolgirls. the president of south sudan and a rebel leader have signed a peace deal involving a cease-fire and the formation of a transitional government. thousands of people have been killed and more than a million left homeless since the current conflict broke out in december. will the deal now hold? here is andrew harding. >> this is an intensely personal conflict between two key rivals.

they have finally sat down and fleshed out the broad outlines of the possible agreement. i think it is much too early to see this as a lasting final breakthrough. above all, it's a reminder of how unnecessary this conflict has been. we are talking about a million people homeless, thousands of people killed, for what, essentially a political dispute with any ruling party. if this breakthrough, the steel sticks, it will at least be proof that conservative international diplomacy in a chaotic messy world can at least sometimes make a real difference. >> that was andrew harding 4s there. in thailand, the police have fired tear gas and used water cannons against antigovernment demonstrators in bangkok. the clashes came after protesters try to force their way into a government building. houses have been out on the streets to demand the resignation of the cabinet. just two days after a court

forced out the prime minister. it is almost as if nothing has changed in the past six months. the conservative royalist movement trying to bring down the government is back on the streets. in fact, they never really went away. the hard-core have been camping here at the prime minister's office the whole time. a were joined by ordinary supporters in this show of strength. the prime minister they have despised is gone, but not the government nor her election winning party. they still want the entire political system cleansed before they will accept an election. we just want to reform our country. this is not a whole lot different from what this movement has been doing the past six months. it has not yet gotten that much

closer to their goal of putting up the government. they are still hoping the courts will do that. if not them, eventually the military. as they have so many times before, they gathered to listen to the movement leader. but it was a weary familiarity to his speech. we must sleep here, he says, apparently forgetting they have been here for months with little to show for it. but there are still many thais who believe in the broader goals. keeping the monarchy at the top and keeping the yingluck shinawatra family out of power. care the moment, i don't what's happening as long as the government is out and we can start to reform thailand and get all the corruption out of thailand. that would be great. >> how long this goes on is

anyone's guess. the prospects of a nonviolent resolution, though, are fading. jonathan head, bbc news, bangkok. >> you are watching "bbc world news america." could frequent arguments with friends and family actually shorten your life? with the newest research says on that. -- what the newest research says on that. italy's former prime minister silvio berlusconi has completed his first day of community service which he was ordered to do after being found guilty of tax fraud. and aarrived for the task car, one protester shouted he should actually be in prison. we have more from rome. >> the media turned out in force to watch mr. berlusconi begin his first for our weekly stint at the care home for the elderly.

allow --uards won't his bodyguards were not allowed inside. the former italian prime minister had been warned by justice authorities not to give interviews. he arrived and left without saying a word. he was originally sentenced to four years in prison. this has been commuted to community service. thatarticipant shouted out he ought to be in jail. a regular volunteer of the care home is unhappy about all the publicity mr. berlusconi still gets despite his conviction for fraud. italian criminal law is leading into offenders over 70 years of age. has been stripped of his seat in parliament after his conviction for tax fraud from one of his media companies,

yet he still intends to lead a and thel campaign forthcoming european elections. he is banned from leaving the country and restricted in his movements in the area that he lives. show about onels in five italians are still prepared to give him their votes. >> the next time you find yourself in a fight with a loved one, you may want to think about this -- a new study says frequent arguments with partners or friends or relatives can actually increase the chance of death in middle-age by two times or three times. there is also evidence that more thanects men

women. i spoke with ashley seger, a therapist. ashley, thank you for coming in. we surprised at the research? >> i was not as surprised as you would think because i really feel emotional stress is so important, so impactful on our bodies it makes perfect sense conflict, especially if it is pervasive within your relationship, it would have an impact on your body. >> how much can pervasive conflict mean? major rows every day or just a couple a week? >> that was one of the important things in the study, when you read it, it really does not define frequent conflict. and before some couples once a week as frequent. for others it could be 10 times per day as frequent. it's hard to know what the pervasive conflict looks like. >> meaning every couple has a threshold of tolerance. >> exactly. >> why do men seem to suffer a more medically from the stress of fights than women? >> it such a complicated topic to know whether it is something

it is male versus female, whether it is something that boys and girls are taught about how to deal with conflict, but i think that men tend to internalize more. they get angry and it can be so explosive they want to protect the relationship and 10 to hold more in. they don't have the skills and tools they need to know about how to get the conflict out in a way that is productive. >> one of my thoughts when i read this report, my head standing had been a certain amount of airing grievances and talking about things and not shoving it under the carpet in relationships was actually a good thing. >> right, right, and i think it's a good thing as long as you're doing it in a productive way and not in a damaging "i just need to get this out and anyway that is traumatizing or injuring. i can add to more stress when there are fights or arguments where it is damaging. >> ok, and a relationship with our a lot of rows, trying to

avoid death in middle life, what do you do to avoid conflict? >> the very best thing is you cannot avoid conflicts, but you can slow the conversation down and take a moment to do a very simple thing which would be to repeat back what you're hearing your partner saying. it sounds silly, they make fun of this in movies and tv shows, but is profoundly satisfying to feel heard. a lot of couples get this a little wrong when they say, "i hear what you're saying, i understand,", but what they need to do is give the partner the experience of being heard by repeating it back with a phrase such as, "let me get this straight, you feel." it's about having them the feeling of being heard and the stress and cortisol levels decreased substantially. >> ashley seger, thanks so much for coming in. fromwill try to do that now on. a lot of mysteries at the bottom of the ocean, but there could

also be major medical recruiters buried in the deep. scientists a there is a new wave of potential medicine waiting to be found underwater. rebecca morel reports, exploiting this exciting medical frontier may not be as simple as it seems. the beautiful coastline of scotland, a hunt is under way. this scenic spot may not look ofe it, but it center cutting-edge medical research. it's here that scientist are pinning their hopes on finding the next generation of life-saving drugs. by studying creatures like this starfish, scientists hope to identify new chemicals and gene sequences i could lead to treatments for anything from infections to cancer. researchers say we are in desperate need of new drugs. the potential of the ocean could sit parked a medical gold rush. >> historically this is not a place people have looked. they have not exploited it. there is a whole raft of new allowing one to

screen more methodically and scientifically, and a political will. we are looking at how to exploit other parts of the planet, how can we produce new industries and technologies. >> there is a lot of energy and resources going into this new area. that is partly because in coastal areas like this, there are clearly defined loss about how -- clearly defined laws about how scientist can exploit the riches of the sea. in deeper water, it's a different story. home to an extraordinary array of creatures and plants, international waters are governed by the u.n. law of the sea. this regulates mineral extraction, but does not cover the hunt for new medicine. the worry is without regulation, these fragile habitats could be damaged beyond repair. now at least, back on shore, research carries on, harvesting seaweed for its wound-healing properties.

it's early days, bringing a new drug to market can take 15 years and cost about $2 billion. this would be a drop in the ocean if this new frontier in medical research lives up to its promise. rebecca morel, bbc news, scotland. the program to a close. find out much more of the day's news on our website. from all of us here at "world news america," thank you for watching. have a great weekend, and happy mother's day sunday. >> funding of this presentation is made possible by the freeman foundation, newman's own foundation, giving all profits to charity and pursuing the common good for over 30 years, kovler foundation, united health care, union bank, and charles swab. >> there's a saying around here -- you stand behind what you say. around here, you don't make

excuses. you make commitments. and when you can't live up to them, you own up and make it right. some people think the kind of accountability that thrives on so many streets in this country has gone missing in the places where it's needed most. i know you'll still find it when you know where to look. >> "bbc world news" was presented by kcet, los angeles.

captioning sponsored by macneil/lehrer productions >> sreenivasan: russian president vladimir putin celebrated his country's military today with a victory lap in the recently annexed crimea as the fighting andç bloodshed continued in eastern ukraine. good evening. i'm hari sreenivasan. judy is away. also ahead, it's an instinct all parents have: to keeptfeir kids safe, but have we gone too far? we conclude our parenting series tonight by asking if this has become the age of "the overprotected kid." >> we've become so preoccupied with safety that we're basically robbing our children of the chance to take risks, the kind of physical, emotional risks, the kind of risks they need to become independent alt