and they were the scenes that the u.s. hoped it would never see again. armed police, tear gas. burning buildings. protesters took to the streets following the decision not to charge a white policeman who shot dead an unarmed black

teenager. the death of michael brown, in the missouri town of ferguson, struck a nerve across america. victoria gaetan brie reports. >> violent protests on the streets of ferguson, angry crowds setting buildings and cars on fire. the police and national guard responded by firing tear gas. it follows a grand jury's decision not to prosecute a white police officer own the killing of unarmed black teenager michael brown. >> they determined no probable cause exists to file a charge against officer wilson, and returned a no true billion each of the five indictments. the physical and scientific evidence examed by the grand jury, combined with the witness statements supported and substantiated by the witnesses tells the accurate and tragic story of what happened. >> reporter: protesters showed

their anger on the streets, the brown family issued a statement calling for calm: the lawyer representing michael brown's parents said the family was heart broken and frustrated by the decision not to prosecute the police officer who shot dead their son. they really wanted equal justice for their child. they wanted the killer of their unarmed child to be accountable. they want people to contain their emotions. they are frustrated. they know others feel their pain. >> reporter: the death of michael brown divided the city of ferguson. on one side residents of this mostly black area and supporters. on the other a mostly white police force. there has been protests in other

u.s. cities, following the grand jury's decision, including new york and the capital washington d.c. president obama called on those who wanted to protest to do so peacefully. he had a message for the police force. >> the police officers put their lives on the line for us every day. they have a tough job to do, to maintain public safety and hold accountable those who break the law. >> as they do their jobs in the coming days they need to work with the community, not against the community, to distinguish the handful of people that may use the grand jury's decision as an excuse for violence. >> the police officer that shot michael brown welcomed the decision saying in a statement he followed his training and the law. many in ferguson don't accept that and are making their

feelings known in the streets st louis's police chief said his officers had come under attack. >> a lot of gun fire. i'm disappointed in this evening. i don't have any hesitation in telling you that i didn't see a lot of peaceful protests out there tonight. i'm disappointed. i'm not saying there weren't folks out there for the right reason. i'm saying it spun out of control, and frankly what i'm seeing tonight. and i have been up there all evening in the middle of it. what i have seen tonight is probably worse than the worst night we had in august. >> police officer darren wilson, the man that shot michael brown issued an alert thanking supporter supporter supporters. -- a letter thanking supporters saying:

daniel lak from ferguson sent this report. >> things have calmed down here. when the grand jury announcement came down early in the evening people had been gathering for several hours outside the police department and a couple of other places. when they had word that darren wilson was not to be charged with the death of michael brown, things erupted. there were crowds pushing forward towards the police barriers, pushing them over. police fired tear gas. there were reports of heavy automated gun fire. so heavy that the federal aviation administration shut down incoming flights into the airport, didn't want to take a chance with passenger safety, and there were a number of businesses and shops set on fire. cars as well, a couple of police cars. things calmed down as it got later in the evening. it's a cold night in ferguson. that probably helped calm things down a little.

the problem now is moving forward - are the scenes going to be repeated, or will the call of michael brown's family, civil rights leaders and president obama, for peaceful protests - will they be heeded. probably, say the activists we've been speaking to. people want the message to get out. the sort of discrimination that leads to the shooting of michael brown, and daily, by the police force and citizens. that needs to stop. that message means peaceful marching in the streets where anger can be seen, but violence doesn't dominate. it's to do with what happens, whether the message gets across or the violence returns. >> protests as the verdict spread across the country, across the united states, new york, chicago, and greensboro north carolina, activists held demonstrations in solidarity with the ferguson protesters.

in oat land california, marchers shut down the 580 freeway carrying banners reading arrest wilson. >> civil rights act visits, reverend al sharpton condemned a decision, and protests came out. crowds gathered and marched down the street carrying placards, condemning the verdict and supporting the people of ferguson. tom ackerman in ferguson. >> anger and unrest after the grand jury announced no indictment of officer darren wilson has been accompanied by other demonstrations. so far nonviolence in other cities - seattle, new york, oatland california, where demonstrators shut a highway. president obama counselled that the demonstrators should be able

to express anger at the results, but respect the police for the job that they are doing, by and large in most communities in projecting them. the attorney-general, at the same time, indicated that even though the officer had been found not guilty of any offense by the local authorities, a federal investigation will proceed, continuing with his behaviour, or examining his behaviour, but looking broadly at the conduct of the ferguson police department, which has been accused of discriminatory policies against blacks in various measures. and however it is - the question here is whether charges will be brought in this case against the officers for the police department and the by historical commaption that has rarely been

the -- examination that has rarely been the case in the united states, because police officers by and large usually get the benefit of the toulent. michael brown's death divided a city and a country. john hendren examines how the event in ferguson sparked so much anger. >> the path to a showdown in missouri began on a summer's day on canfield street. within 24 hours race divided a city and a nation. on one side residents of the black town and their supporters protesting - sometimes angrily. on the other, emotionally white police force, dress the ribbing soldiers, but for war, firing tear gas at demonstrators. >> we have press over here. >> and an al jazeera crew. >> the stand off came over a murky confrontation. on the street michael brown and a friend.

darren wilson, a white police officer in his 20s. >> several more units over here. there'll be a problem. >> the confrontation took 90 seconds. michael brown's supporters say he was shot six times. michael brown was killed while fighting with darren wilson, and struggling with his gun. for four hours michael brown's body lay in the sun. a scene recorded by neighbours. >> ferguson was a name bandied from the missouri state house to the white house. >> to a community in ferguson that is it rightly hurting and looking for answers. let me call again for us to seek some understanding rather than simply holler at each other. in the aftermath of the shooting, hundreds of arrest. block after block of devastated

businesses. [ chants ] >> reporter: in four months of demand to indict the officer for manslaughter or murder. >> my hope is to move forward as soon as possible on the healing. >> [ chanting ] >> the outcry on canfield street may have transformed the town another police shooting led to demonstrations - this time in the u.s. state of ohio. a 12-year-old black boy with a toy gun was shot and killed in the city of cleveland. kristen saloomey has the report. >> we are not accepting excuses. citizens at ohio gathered at the park at the gazebo where a 12-year-old was shot and killed by police. they say it's not the first time the police here overreacted. >> it is a travesty and a wake-up call showing that cleveland is no different to

ferguson. the difference in ferguson is they are more proactive than we are. [ chanting ] >> reporter: they are calling for a better trained and more diverse police department. mostly they want justice for tamir. >> it's nearly dark. it was mid afternoon on saturday when police were called here. they were three meters from the boy when they told him to put his hands in the air. instead they reached for the waste band. >> it was a day replica shooting pellets. the orange tip meant to distinguish it from a real gun had been removed. it's not clear if the officers were given the messages. the two officers involved had been put on leave. >> guns are not toys. we need to teach our kids that. the community needs to understand that. guns are not toys.

the facsimile reppon, in this gent is distinguishable from a real firearm. we need to drive home from our kids that guns are not toys. parents need to be aware of that. >> friends suspect he had the toy down to deal with bullies, and can't understand why it has come to this. >> why did they do it? they did it for nothing. >> i want to thank everyone for supporting my little brother, and i don't know why they did that. he was only 12. he wanted to play basketball in the n.b.a. >> tam ear's sister has questions. it's expected to take months before the family has answers.i. it's expected to take months before the family has answers. still to come on al jazeera... >> i'm andrew simmonds on the tram line linking occupied east

jerusalem with the west. i'll assess the mood of fear amongst palestinians. >> tracking climate change by mapping the waters of the antarctic. the full story coming

hello again. a reminder of the top story on al jazeera. the city of ferguson, missouri is trying to return to normal after a night of violence. this is a live picture from the town. protests broke out following a grand jury decision not to

indict a white police officer who shot and killed a black teenager in august. 29 people have been arrested this evening. after the grand jury announcement. u.s. president obama called for calm. in a nationwide address he urged americans to accept the grand jury decision. >> residents across jerusalem remain on high alert a week after 5 israelis were skilled in a synagogue. the incident followed weeks of back and fourth attacks in the city. jerusalem is gripped by anger and fear, a climate that is fizzible on the city's trams linking occupied east jerusalem with the west. andrew simmonds explains in the ancient city of jerusalem. this is no ordinary tramline. it follows a route of division between jews and arabs, running on what was part of the green line separating jordanian east

jerusalem with the israeli west, before the 1967 war. >> stop by stop this tram follows a modern time line of division and tragedy. the line links the occupied west with the east. it's a focal point for anger. here, now, there's a sense of frustration. of fear. >> that is not surprising. most places you look, there's a gun in site. newer people are getting on board now. the concrete ball ard is to prevent attackers crashing cars into crowds. two were killed here a fortnight ago. two weeks earlier, a woman and a baby were killed. in both attacks palestinian drivers were shot dead. >> there is fear when you get on the train. we have to reach a solution. we all live here, then and us. the train is ours and theirs.

the arabs have to understand that we are not the british. we are at home. they will never stop us. >> since the start of the incident there are fewer on the tram. we are setting out to work. we don't know what will happen on the way. anyone can harass us. the feeling is not good. it's scary. >> predictably at night the risks are higher. a few meters aa palestinian was snatched from outside his home in july by a jewish gang and burnt to death. it followed the murder of three israelis, and the cycle of violence started. this damage to the station, only the beginning of widespread rioting. here a short distance away there's the aftermath of

confrontation. rarely a night goes by without trouble. when will it stop. could it get worse before it gets better? >> god willing we hope the situation will go back to the way it was before. runs there is peace. they will feel safe, we will too. >> we are neighbours who have to live together. that's how it is. >> but is that wishful thinking. the tram heads west with no solid hope of it one day symbolizing the peaceful existence of jews and arabs. >> the foreign ministers of the gulf cooperation council are meeting in doha ahead of a summit next month. we go to doha and we are going there. what is expected, jamal? >> well, the fact that this meeting is taking place is seen as a good sign for break through

of the gulf countries, which have been uneasy to say the least. it follows a meeting in saudi arabia, where intermediaries from kuwait and saudis - qatar was essentially edged out so to speak of the gc c because of some of its stances. some were unhappy that doha took a different stance particularly with regard to egypt and its opposition to the practices of their military, and the crackdown on democracy over there. it seems come of those disagreements have been settled at least, and now this meeting is taking place and we are going to wait and find out if there'll be any other achievement for the meetings that will begin shortly in doha. >> thank you very much. >> jamal, to egypt where a

building has collapsed in cairo. at least 12 people have been killed. >> the building collapsed in the mataria district tuesday morning. others are thought to be missing under the rubble. egyptian president abdul fatah cysty has met european leaders. the situation is on the agenda in talks with the prime minister. abdul fatah al-sisi met pope francis at the vatican. al jazeera continues to demand the release of our three journalists who have been held in prison in egypt for 332 days. peter greste, mohamed fadel fahmy and baher mohamed were gaoled on false charges of helping the outlawed muslim brotherhood. they are appealing against convictions. world leaders who failed to reach a nuclear deal with iran.

are looking to persuade skeptics on both sides that an agreement cap be reached. a week of talks fizzled with the u.s. and allies declaring an extension on the deal. jonah hull reports from the austrian capital. >> reporter: the talks had broken up with that agreement, but secretary kerry and other ministers were involved in putting on brave faces. this is not the end of the road. >> today we are closer to a deal that would make the entire world, especially our allies and partners in israel and the gulf safer and more secure. is it possible that in the end we just want to ask at a workable agreement. absolutely. we are certainly not going to sit at the negotiating table

forever. absent measurable progress. but given how far we have come over the last year, and particularly in the last few days, this is not certainly the time to get up and walk away. >> in tehran, president hassan rouhani was upbeat. sooner or later there would be an agreement. >> we have not reached a final agreement. today things are quite different to three months ago. >> how much would have changed four months from now. by now, a framework agreement will be in place, or in seven month's time. this is it a process cloaked in secrecy watched by conservative skeptics on both sides, and in which deadlines many little. two missed, two new ones in place. we thought we were in for a repeat of geneva, negative

predictions up until the last moment. a deal emerges. that is not the case here. the question is whether the extension period. enough progress can be shown to have been made to convince skeptics on both sides of the process to carry on supporting it. >> it will be difficult for the president obama administration to convince the progress, to put more tan the table and bring about relief. what we know is significant gaps remain in negotiations to limit iran's ability to produce weapons grade materials. what we don't know and are not likely to be told is how far apart the two sides are. they have seven more months to succeed. up to now, they have failed.

there has been two separate explosions in the african capital. six army personnel were injured when a mini bus they were in was hit by a roadside bomb. some were arrested after throwing a hand grenade. we are also getting reports that three police men have been killed in loggar province the united states deputy secretary chuck hagel's resigned. the former republican senator has been pentagon chief since last year. he'll remain in his job until a successor is nominated. >> and a submarine is to dive into the antarctic sea to map how thick the ice is. british scientists hope their work will help to better understand the impact of global warming. our environment editor nick clark reports.

>> powering through in the name of science. a british antackic survey ice breaker heads south, its mission to measure the sea ice, crucial information for scientists in the context of climate change. the so-called seabed robot is deployed, weighing in at 200 kilos, and nearly 2 meters long, it's been designed by the woods hull graphic institute in the u.s. as it submerged into the icy water, the robot complex software fires up. they look down at the sea floor. this has an upward facing sonar. they are controlled remotely from on board the ship. maybe to perform detailed mapping. >> when we look at it on the

surface we see the blocks. >> it's hard to look at and see how thick it isment what we have here is a robotic submarine going under the ice. it will look from the bottom and give us a 2d map. >> the imagery is crunched with satellite data to create 3d. the underside of the size provide a rich tab low of information about its structure and how it's changing. >> we find that the area of sea ice is shrinking, and, therefore, we are trying to understand the process, of why the area is reducing. >> so far only a small area has been mapped. about the seize of 100 football pitches. scientists say it's an important step in making routine measurements to understand large-scale changes happening in antarctica

and a reminder that you can keep up to date with all the news on our website, which you can see on the screens. it's at aljazeera.com. once again, aljazeera.com. have to come together. molecular neuro scientist. tonight on the trail of synthetic drugs. chemist versus chemist as cops need scientists to track down illegal drugs hitting the streets. kost a. s grammain, tonight, cell phone secrets, how one tech company can tracked moves and what they intend to do with it. marita davison is specializes in ecology and evolution. tonight, it looks like chicken, but it's not.

the new meat substitute created from the lab gets the techknow taste test. >> that's our team. let's do some science. ♪ >> hey, guys, welcome to tarrant county tech teckhnow. you looked at designer drugs? >> specifically technologies that could be used by law enforcement or medical professionals to stay one stead ahead of chemists designing dangerous drugs for people who are in charge of illegal highs.

let's take a look. >> methadrone, jwh, 18. >> an unfortunate right of passage of parents of teen aners is dealing with the discussion of illicit drugs. >> 2 cb. >> but now, a pharmachopia would be more helpful. >> there is a cat and mouse game chemists. >> they are catching on and cat cashing in. they are finding their way to the united states military because unlike using pot, cocaine, or crystal meth, these synthetic drugs will not show up on standard drug tests. >> these things are designed to be attractive, particularly to children. they are designed to appear safe. they are designed to appear wholesome and herbal and all of these things that we like to assume are good. >> are they legal? yes. dangerous? yes. sophisticated?

yes. it's a worldwide epidemic molecules. >> how different are these compounds from the scheduled compounds that we would be seeing as illegal drugs. >> some are close. they can be the difference of after single carbon and two hydro jens or they can be the exact same structure just put arrangement. >> even though they are synthetic versions of the real thing named spice, incense and bath salts, a loophole also says not for human consumption. nightmare. >> how we ha problem. >> the world of drugs for controlle toxicology, five, eight years ago used to be about 250 compounds, all of which we understood well. now, we are getting 10, 20, 100 new compounds that show up every year. until california, sdieber

drugs have been a big problem in a small beach town that is home to a naval base. >> are you okay, diane? >> 7 ario officer ryan bates battles the sub stances every day. >> if i stop somebody and they have this package on them, i can't do anything. i can't even could befiscate it. so law enforcement, if we have an incident where somebody sells this, i have to prove that it meets one of the very few action. >> officer bates busted all of the smoke shops and some liquor stores two years ago. >> how long did it take your officers to amass this? >> we did this in one night. >> drugs keep coming back. tonight, our undercover cop was able to buy this synthetic pot called wtf. >> that video game. >> you don't know what you are getting. it's sold as herbal incense, potpourri. but it's not.

it's a powerful, powerful drug. in some cases, they have tested it 500 times, the potency of cannabis. people are literally dying in the streets using these because take. >> screaming. >> help me. >> officer bates showed us how easy it was to buy an illegal drug online. amt was shipped directly to his home and came labeled as a workout supplement on the customs receipt. >> you did send this to the lab be. >> one gram of a very powerful hallucknow gener hallucinogen. >> rti, one of the few labs in the country capable of researching synthetic drugs almost as fast as they appear. >> where are they coming from? >> a lot is come from china, areas of the world that have less oversight and less regulation oftentimes. >> is it any different than what

you would see a pharmaceutical company that was designing a drug for good use? >> yes, i have taken to saying this is sode. ed version of research. >> the synthetic producers have an almost endless supply of alternate formulas that will pass as legal. >> rti hopes to detect a greater varietied of chemical he concentration. >> how little material do you need in order to see something on this machine? >> american currency goes through lots of processing at the banks. cocaine that is floating around in the system is essentially on all currency. so we can look at what we've got on this dollar. you can see right there. >> that's cocaine. >> this package was one of the samples of a designer drug in the lab at rti. >> and the ingredients it claims

that are in here are ancient herbs, mugwho are t, damiana leaf and baybeans extract. do you think we could use this machine to tell us if that's what's in here? >> we certainly can. we got a big peak right there. >> what does that usually core respond to. >> a known synthetic cannaboid. >> what was in the package was a chemical variation of marijuana. rti's research is helping law enforcement identify how the designer drugs are identified in the body so they will pick up the substances and sellers and prosecuted. >> so while these compounds are not stable, so you may start with one drug and when you light it on fire in a cigarette, it couldverts to something else. what the person is taking isn't what they think they are taking. >> this machine will smoke the designer drugs to help researchers determine exactly what the compounds become after

they are heated and ingested. >> people willingly put these compounds into their body when we are not even in a place to animals. >> officer bates has made it his mission to educate the public drugs. >> this really needs to be on the forefront right now of law enforcement and lawmakers because it's, like i said, it's ruining people's lives. >> i think most of us had no idea about these people pursuing these loop holes in the law. and i have to say i am kind of impressed with the chemists behind it? >> the chemistry is impressive but it's so dangerous. in this case, the toxicology trials are putting the drug out happens. it's so risk. >> altering chemical structures is a common thing. >> when you are altering these chemical structures, it's very easy to do, something we do every day. the problem here is that we need

to regulate because there is no control over how toxic these chemicals are and it's difficult to do that. >> thanks for sharing your expertise. now, kosta, coming up next, what phone? >> brand-new company has uncovered a way to track your phone through your wi-fi. >> we will see that coming up next. >> we want to hear what you think about these stories. join the conversation by following us on twitter and at aljazeera.com.

welcome back to "techknow." kosta, when it comes to tracking, we will see it in a spy film but you are finding it in a different context? >> companies are using your cell phones to market to you now. we went to toronto and visited a number of companies who are using your bluetooth, wifi signal, cellular that's sold bying a greg gat to explore where you are going and what you are looking at so they can market to you more effectively. let's check it

out. toronto, canada. it's arguably the hippest and probably most closely monitored shopping center in all of canada. how? by something everybody carries. smart phones over a dozen businesses on this mile long strip are monitoring phones and most people don't know about it. one is happy child bar and restaurant. a sinceor sniffwi-fi. >> why did you name it happy child? the data from trucking customers' phones? >> there is no way to get a feel

for that, those kind of numbers unless you hire a marketing firm and spend thousands of dollars. feel. >> for brick and mortar establishments like myself, they arats a did you say advantage because they have web counters and all of this information how many people who come through the door and how long they stay. it gives you useful information here the average visit is two to three hours. >> has anyone come mind about this tracking? >> none of my actual patrons seem to mind. at the end of the day, if you are walking around with your wi-fi enabled, there is alternates more that someone can potentially do to you than, you transmitter. >> on the one hand, it's a little bit creepy because it's watching.

>> i guess you are giving away your privacy. >> every mobile phone has a unique 12-character media access control address or mac address. it's your phone's fingerprint. the sensor reads the address and as another four randomly assigned kaingz on either side. that's encrypted with the national security agency's sha-256 encryption algorithm. what you get is a completely original 64-character id. happy child's data analysis is collected by a toronto startup turnstile lotions. three college buddies wanted more fans for their band. >> everyone carries cell phones in their pockets. automatically. >> turnstile was about finding concerts? >> figure out a way to reward them and say thank you. >> then you realize every retailer has the same questions

about their fan base or customer base. >> now turnstile has 250 sensors in small businesses across toronto. the data has helped them adjust staffing, hours and one added an 80s dj. it's not all about sales. turnstile's data is being used to design plans for upgrading public transportation. >> so i was at happy child, my wife, i turned on my phone. can we see that information not? >> we do not present that information about individual phones to the retailer. >> doably but a length process. >> how many? >> 13 million unique devices it does have an option? >> it's like the do list.

>> they have signed to the opt-out. they aren't the only way your cell phone can be tracked. gps, bluetooth, social media, apps and cellular signal can be used to figure out who you are and what you are doing. >> the nsa certainly does it all the time. >> ucla computer scientist peter ryer tracks privacy issues. >> the reason it happens more often is because all of the information we are talking about cross references belongs to a company. they are not going to offer that information to any other company because that's giving away something for free. >> ask the data marketing norm. they buy cellular data from phone companies? >> it's a massive amount of signals. it's not about an individual person but clusters. they are more valuable to marketers than individuals. >> to get an idea of what is posishly, we ask him to isolate a single phone as it moved through its day from the phone's

home to the grocery store down to the starbucks and finally, to arena. >> triangulation allows you to put two or three reference points together that allow you to get as close as you can to where that person might be. that's why we have designed our business based upon the generalizations and not the specific? dwhu buy that. >> usc raw prefacers aren't buying the promise of an am i am on thety. >> there are other peoples, other people have information about who is going to which doctor or who goes to which neighborhood or who patronizes which store and they can cross-reference that . >> people didn't know their phone was leaving bread crumbsa that people were storing and sell to go everyone else.

you could call it innovative or creepy. >> they are not interested in individual people. their marketing budgets can't support it but norm follows public post okay insta graham and facebook and those became fair game when you click "i agree." > the jayz saying things in a concert. >> i want to find out how many people hash tagged ms. brandon. >> that's one thick we could do. >> the audience was older than expected and molson was the crowd's favorite beer. >> at happy child, data showed a significant number of customers hit the gym. team. >> a team that sports a marketing bonanza?

promoters. it's yours. take it. >> hold still. what is hatching to my cell phone right now. >> right now, your phone is talking to cell phone towers. is stored by cell phone companies which is then sold off to be parsed by other companies. >> i am thinking for me, it might be nice to not have to spend a lot of time shopping for things that i am looking for, like what if the computers can for? >> we live these digital lives so big data seems inevitable that we are just moving in this direction where everything is documented, everything can be tracked in this way. >> i was thinking this balance, we make a lot of ourselves public through things like twitter or facebook, but then we also want a lot of that private. it's a hard balance. coming up next, marita, you have something a little different than this. i hear it's edible. >> i will tell you about a company trying to change the way we look at meat, the way we eat meat and hopefully make you a little bit more healthy in the

process. so we will see that after the break.

scomplrning welcome back to "techknow." ." marita, you took a look at meat or at least something that looks like meat. >> looks a lot like meat actually. americans, we love meat. we eat more of it than almost anywhere on the planet but it's extremely environmentally costly to produce. there are lots of meat alternatives on the market. there is a company based in california producing a product that they claim simulates meat very, very closely so you may not even be able to tell the

difference. so, i went and checked it out, put it to a taste test. so let's take a look. >> grilled, sautéed prosprocessed or packaged. america's obsession with meat is ferocious. we consume over 270 pounds per person per year. but now, the demand for meat is spreading to new global heights and experts predict we won't be able to sustain it. >> i would say we are already not doing it sustainability. we are crawing on the planet's resources more than we should be alone. >> the united nations estimates meat consumption will rise nearly 75% by 2050. the rising trend has triggered a new crop of meat alternatives helping to ease our reliance. >> here in california, we have a small town with the

headquarters.

s.adquarters. >> it's very much a chicken source. the meat is not the main part of the meal. >> i'm a big meat-eater. i don't know that i would choose it over the real stuff. >> i was skeptical, seeing that piece, it looks good. >> being a carnivore is

basically written into my d.n.a. it looks like it, feels like it and tests really close. >> as you guys know, we are nerds at heart, when we are not filming techknow segments, we are having fun and hanging out with scientists, as you see here, crystal and i hung out with our friends at nata, and had to go into a clean room. this is an air shower. >> right, we are looking at where they are building speck roe tom terse for the mission. we had to tres -- dress like we were in the operating room. >> would you guys like to follow us in the field. be sure to check us out on tech

nee. announcer: this is al jazeera. hello. this is the newshour live from doha. i'm veronica pedrosa. coming up in the next 60 minutes... >> we are a nation built on the rule of law. so we need to accept that this decision was the grand jury's to make. >> rioters defy the u.s. president's call for calm after a grand jury decided not to put a white policeman on trial for