good evening, i'm antonio mora, this is al jazeera america we have agreed to implement a nationwide cessation of hostilities. it begin with a target of a week's time. >> a milestone to help those tuck in bloody war. >> in this country we need a government to representatives all of us. >> i think america can only live

up to its potential when we make our every american has a chance to live up to his or her potential. >> bernie sanders and hillary clinton spell out their distances ahead of the primary. >> it's not close. it's not even close. it's hillary clinton. >> why the professional ages committee endorsed hillary clinton. >> after 41 days and one death. the armed occupation of a wildlife refuge in oregon comes to an end. >> international negotiators made sa potential brae) breakthrough in syrian -- breakthrough in syrian peace stalks. john kerry announced a cessation of hostilities in the civil war expected to go in effect in a week. if it sticks it will give workers access to areas cut off

from food and medical care. as reported, the deal is the result of some difficult talks. >> 19 delegations, the sponsors of international peace efforts in syria gathering in an effort to get things back on track. the most important meeting happened earlier on the 15th floor of the same munich hotel. this is where russian foreign ministers sergey lavrov and john kerry came face to face. if you look at the faces, you can tell this was a difficult meeting. russians proposed a ceasefire, the u.s. said it would mean tree weeks more of area bombardment. when they addressed the media it was in the early hours of the morning. neither man got what they

wanted. they announced a target of a week, in which to stop the violence. we have agreed to implement a nationwide cessation of hostilities, to ben if one week's time. that is ambition, everyone is determined to move as rapidly as possible to achieve this. >> this plies to any and all parties in syria. with the exception of the terrorist organizations d.a.e.s.h. and al nusra. >> they said a joint task force would be set up. and another on getting humanitarian aid in need, would meet for the first time in a matter of hours. >> this is the list of the areas and the people in need, and the numbers of them.

the u.n. was told you are in charge. with our support. >> this was a series of meetings. what they achieved reads well on paper. the test now is turning it into reality on the ground. >> a contentious debate between the two candidates. bernie sanders was trying to keep his momentum going. hillary clinton trying to regain her feet. david shuster joins us from the debate site. we have seen the two candidates get along most of the times, things changed tonight. a lit the like when you watch a republican debate you see a block buster, it wasn't like that, towards the end. hillary clinton wrapped herself

in president obama, talking a lot about how she thinks president obama was a great president with great policies, thinks she'd do differently, and calling out bernie sanders saying the president was not offensive. bernie sanders came back saying i'm a senator, i'm allowed to criticise of the president. it's part of nigh job. an interesting change. >> they touched on foreign policy and health care. it was clear that bernie sanders wants to talk more about foreign policy. the campaign feels that is an area where, of course, hillary clinton with her experience, and bernie sanders concedes that, with her experience has an advantage in the argument, in the conversation. corey sanders tried to talk about that, how he would not be for regime change or support

henry kissinger. how hillary clinton getting his support. health care is something that bernie sanders wants to provide for everyone. costs haven't been revealed. >> the family in the middle of the economy would pay 500 more in taxes and get a reduction in the health care costs of 5,000. health care is a right of all people, not a privilege. and i will fight for this. >> this is something that resonated with bernie sanders fore younger, pour americans, it worked in iowa, new hampshire. hillary clinton wanted to stop it and had an answer. >> we share the goal of universal health care coverage. before it was called obama care

it was called hillary care. i took on the drug companies and the insurance companies to try to get the coverage. >> she's trying to say it's an issue she has been a part of. it's something they are extrapolating, you don't hear it in the debates. it's a familiar reframe. >> thank you. before the debate. hillary clinton's campaign got a boos. the pack endorsed her for president. it could help in the primary where african-americans are a big part of the elect ralt. >> good evening, this is especially a huge help for mrs. clinton. as the democratic campaigns rolled south, and who comes out on top may be determined by african-american voters. a major tip of the hat by the black caucus action committee in favour of the hillary clinton. >> when we need someone to come

to rally, democrats and african-americans, and at the request of the pack, hillary clinton has been there. when the issues are important to our constituents african-american and latino voters are important to the candidates chances. it was no coincidence that bernie sanders had breakfast in new york's harr lum neighbourhood. hillary clinton is married to the man many called the first black president. the measure of the affection the clintons are held in. it's not all clinton all the way. african-americans are devoided on who should be the nominee. prominent human rights activists

bella fonta has not endorsed hillary clinton, he is going for sanders. >> he represents opportunity and a moral imperative, and a truth that's not often evidenced in the course of politics. while the black kauk suss gives clinton a thumbs up. the whiter not so much. a senator tweeting out: the c.b.c. endorsement is one the client pack would be clad to have, and the 22 point defeat. bigger and more embarrassing than affected. they are trying to rally

supporters after hillary clinton was forced into a concession speech. they are have learnt it's whether you get up. >> as the focus shifts to south carolina and nevada, clinton is counting on support to propel her to nominations. >> black voters will propel her to the vote, first in the south, and south carolina. the democrats vote comes up towards the end of the month. >> friday trading is in full scring in asia, and market are broadly down again. the drop coming after a fifth day of sell offs in wall street. investors are concerned about global economic weakness and the falling price of oil. the dow closes, and financial stocks are hit hardest. oil closed at $26.21 a barrel on thursday, the lowest levels

since 2003. >> still ahead on al jazeera, the occupation of a wildlife refuge facility in oregon it over. how it ended, and what people in the community are saying. >> and a new york police officer on trial for a fatal shooting in a public housing stairwell. today the jury handed down its

verdict. the standoff at a federal wildlife refuge in oregon ended when four remaining hold outs ended. following the arrest as cliven bundy was arrested as he stepped off a flight in oregon. the fallout from the armed occupation will be felt in the surrounding community for some time to come. >> the situation at the wildlife refuge wrapped up. issues raised by the protest, about federal land management practices and the impact on private landholders, those issues remain. for the people in south-eastern oregon and the city of burns, it was a tough way to start the year. >> on day 41 it end. three of the last four occupiers surrendering first, leaving a

man behind. david fry, a radic live streamed videos and phone conversations drew tens of thousands of listeners. >> i'm not a christian, i'm a jewedist. juhaism. i'm taking my stand because you guys take everything out of context. it's better to die with honour than be forced to live dishonorably, that's what i'll doing. >> reporter: periodically threatening to kill himself or die confronting authorities, he died last thursday. >> he was live streaming. he was in an emotional state. i have to believe at a certain point he looked around, noticed he was there by himself, and it would behove him to remove himself from that situation. >> reporter: in portland. the nevada rancher whose two sons led the takeover was in court. arrested on his way here, he'll

face charges stemming from a 2014 confrontation. as restrictions eased emotions were mixed. jacob was one of several flag-waving supporters searching for positives. >> no matter how long they are locked up, yes, in the end it's going to be worth it. it will be noticed. it's going to be inspiration all across the country. >> julie waical who lives a few miles from the site was ecstatic. >> i posted hallelujah on my facebook post of the i think it says it all. i'm so glad this is over. >> it started january 2nd, when the bundy brothers and 20 followers walked in and took over federal buildings. the bundies and others were arrested on the 26th, travelling to a meeting in a neighbouring

town. during the stop, finighan, a main spokesman, was shot and killed. the arrest and shooting scattered most of the group. more followed. four held their ground. >> we can't let the people trample on us, siding with the government, taking our guns. >> when the end came. julie was happy, but she said the 41 day ordeal made her angry. >> a small bunch of people with some - a broad ashortment of gripes and com -- assortment of gripes and complaints can tear up a community in a way that i didn't think i could see. that is what happened here. >> with the refuge cleared and the forensic investigation beginning, the community has a huge job to do. healing the wound opened by the

occupation. >> we can work through these things. there has been a lot of hurt, a lot of things said. but i don't think there's anything that can't be worked through. >> the federal bureau of investigation has on their hands a multi acre building crime seen. they have presencic's experts on the screen. and the department of justice announced nine indictments filed, seven arrested. people connected with the takeover of the mallier wildlife refuge a new york city jury convicted a police officer of manslaughter for killing an unarmed man in a public housing stairwell. the officer patrolling a stairway when he fired a shot. it killed a 28-year-old. he maintained he fired

accidentally after a noise fired him. he faces 15 years in prison. a federal grand jury is hearing evidence in the death of eric garner, a new york city police officer putting him in a chokehold, captured on cell phone footage. a civil rights investigation was hoped after a staten island grand jury decided not to invite the officer on criminal charges. >> the world of science is celebrating a major discovery. gravitational waves. why are scientists excite. next, an astronomer explains why it could give us a new way to look at the universe.

south carolina crewing say they have temporarily stopped a 3 month long gas leak in the parta ranch area, and hope to seal the leak in the next few days, thousands of families have been affected. >> albert einstein was right. a century after he predicted graduational waives, scientists found evidence that they exist. the waivers are ripples. as jacob ward shows us, it could

open ways of learning about space and time. >> the best way to under the notion of gravitational waves is to under the medium. like space time. think about space time like a bowl of jelo, everything in the universe is in the jelo, as we move, we send out waves in all directions through the gealo. any movement gives off those vibrations. the need has been that it would take an enormous event in space to have a shot at detecting them. it was the collision of two black holes. something violent like that gives off these waves, this is the first time we measured them. albert ian sign theorized they this existed. it wasn't until now we had a

device sensitive enough to listen to them. here is the problem. everything is worked by gravitational waves. when you measure the movement. >> you can't hold up a ruler to do it. the waves passed through. the ruler worked as well. instead, scientists used a laser between two points. the lygo gravitational wave territory. laser light moves at the same speed. scientists determined that it was connecting between the two points, a little paster than usual, meaning that although the laser is the same, the instrument was warped by waves. several millimetres later it happened in washington state. >> did you here it. it's a rumbling noise, and then a chirp. let me do that again.

that's the chirp we've been looking for. scientists have a way of measuring something new. listening to the universe in a new way, enabling them to look at black holes, hear all kinds of space event. here is how one of the lead scientists of the project. it's worth knowing how this guy on the team - here is how he described it. the universe is very serene, x-ray telescopes. it's violent. gravitational waves are radically different from magnetical waves. we can be sure that we see big surprises. >> this discovery could unlock a new field of physics and astronomy. in the same way we watched light bend and fig our out what

planets could be habitable. this could give us a new way to watch or listen to the yuans verse. >> joke us is a director of the fels plan terium at the franklin institute. to say that this is mind blowing is an understatement. one reason the gravitational wave was detected was because of massive energy released by a black hole collision, that it was comparable to a billion trillion suns, that is almost unimaginable. >> one of the things about studying the universe always is the scale of everything, everything is a billion trillion this, or some enormous distance. using the defies nobles us to get a better understanding on how it is the universe can pull off the event. it's commonplace for the universe to create black holes and create them at the cores of

supermassive galaxies. now, with this instrument, the first instance is sort of like just a little taste if you will, a sampling of what we learn about other kinds of very explosive event that have been happening in the universe, and possibly still are. >> this one happened a billion years ago. and the only way it was detected was because of these sophisticated observatories. >> yes. that's true. that's a wonderful thing about this. here we have seen an event in the universe that we would not have known occurred if it were not for this device. what that leads us to believe, and what einstein was theorising is there are many event like this that happened in the universe. even though einstein could not see anything like this, he knew, according to the mathematics and physics that he was working

with, that the event could be taking place. now we have a revealing of a new universe because we are getting to see things that before were invisible and unknown to us. >> why should the average person care. are there practical applications? >> you know, i would love to say a device like this would help to make the mart phone smarter. i don't think it will happen, the wonderful thing is that not only do we have added to the body of work done so par about einstein's works, we know better just how much of a genius he was, and it helps us to more fully complete the picture about the environment that we live in. in some ways, having more information about the universe helps us to clearly define who

we are and who our place is in the universe, in the grand scheme of things. >> the national science foundation spend a million dollars. we have about 40 seconds left. what does it mean the gravitational waves stretch the universe in one direction, and compress it in another? >> it's telling us about the make-up of the universe and helps us to probe the structure so we can get a grip on what it is. concept of space-time is difficult. devices like this will better help us understand it. >> it's fascinating and amazing that einstein can predict something like this without having the instruments 100 years ago. >> derek fitz, good to talk to you. >> i'm antonio mora, thanks for joining us. for the latest news any time head over to aljazeera.com.

ray suarez is up next with "inside story". have a great night. reat night. new hamp sheerp primary news, you might have missed this. the obama stopped the issue on power plants. there is a suit for more than two dozen states and the power industry pushing back on the obama plan and in a five four vote the high court plunked a question mark on the future of are paris climate