aljazeera.com/techknow.low our contributors on twitters, facebook, google+ and on tech know, >> i landed head first at 120 mph >> a shocking new way to treat brain injuries >> transcranial direct stimulation... don't try this at home... >> but some people are... >> it's not too much that we'ed fry any important brain parts... >> before you flip the switch, get the facts... >> to say that passing a low level of current is automatically safe, is not true >> every saturday, go where technology meets humanity... >> sharks like affection >> tech know, only on al jazeera america thj. this is al jazeera. >> hello there, welcome to the news hour. i'm laura kyle in doha with the top stories. peace deal, all rebels victory, after strengthening their positions in the yemeni capital. kurdish, repel i.s.i.l, thousands still crossing the border into turkey. >>> children goes back to school in

aljazeera.com/techknow.low our contributors on twitters, facebook, google+ and >> on tech know, imagine getting the chance to view the world. >> the brain is re-learning how it sees again >> after decades in the dark, >> i couldn't get around on my own >> a miraculous bionic eye... >> i'm seeing flashes >> great >> tech know, every saturday go where science meets humanity. >> this is some of the best driving i've every done, even though i can't see. >> tech know. >> we're here in the vortex. only on al jazeera america. >> this is al jazeera america. i'm thomas drayton in new york. let's get you caught up on stories this hour. a major breach in ceasefire in eastern ukraine. president obama makes a controversial move, delaying action on immigration reform until after november elections. it's lights out in the parts of the midwest as severe weather knocks out power to hundreds of thousands of homes. in tonight's deeper

that's our team, now let's do some science. >>> hey, guys, welcome to "techknow." i'm phil torres jind by marita davison and costa. you designed bionic eyes yourself. and this story you got to look there. >> you talk about changing the world and huge innovation in science and technology, talking about restoring vision for the blind. this new technology approved by the f.d.a. - weigh saw it installed in a patient. it's amazing stuff. let's check it out. [ ♪ music ] . >> reporter: in a few minutes lisa will undergo an innovative surgery procedure, taking her from darkness to eventually seeing shapes outlines and images. >> and we are literally hours right? >> yes. >> reporter: how long have you been waiting? >> a year and a half since i heard about it and trying to get though the process, approvals. i can't believe it's here. >> reporter: lisa has rhettinal pigmentosa, a degenerative disease. sight loss can be severe to complete blindness. >> i see shadows, and sometimes silo wets, depending on the light in the room. it's gradual, since my mid 20s. probably in the le

welcome to "techknow". welcome to "techknow".hil torres, with me kyle i'm phil torres, with me kyle sil, cara santa sil, cara santa maria, and maria, and lindsay moran. lindsay moran. lindsay moran, the only c.i.a. lindsay moran, the only c.i.a. operative - you are the in-house operative - you are the in-house security specialist. security specialist. you got me to look at a smart you got me to look at a smart gun coming with controversy. gun coming with controversy. >> that's right. >> that's right. we talk about the controversy we talk about the controversy later. later. first let's look at the first let's look at the technology. technology. ironically after years of ironically after years of working for the c.i.a. in danger working for the c.i.a. in danger zones, i tried out gamutry zones, i tried out gamutry worth -- gadgetry worth -- gadgetry worthy of worthy of james bond in the sense of a james bond in the sense of a high tech handgun. high tech handgun. let's have a look. let's have a look. >> reporter: when i worked at >

aljazeera.com/techknow.ow our contributors on twitters, facebook, google+ and >> this is al jazeera america live from new york city. i'm tony harris with a look at today's top stories. >> the words spoken here today must be matched and translated into action. >> president obama takes the helm at the united nations security council as u.s. warplanes again bomb isil, syria d

aljazeera.com/techknow.low our contributors on twitters, facebook, google+ and >> on tech know, imagine getting the chance to view the world. >> the brain is re-learning how it sees again >> after decades in the dark, >> i couldn't get around on my own >> a miraculous bionic eye... >> i'm seeing flashes >> great >> tech know, every saturday go where science meets humanity. >> this is some of the best driving i've every done, even though i can't see. >> tech know. >> we're here in the vortex. only on al jazeera america. >> >>> heavy shelling in eastern ukraine, despite a ceasefire between government forces and separatists. hello, i'm sammy, you're watching al jazeera live from doha, also ahead as aid agencies provide a life line for thousands in gaza, the palestinian president accuses hamas of running a shadow government. >> president obama accused of backing away from immigration reform >>> a disease which affect young and old

aljazeera.com/techknow.low our contributors on twitters, facebook, google+ and >> on tech know, imagine getting the chance to view the world. >> the brain is re-learning how it sees again >> after decades in the dark, >> i couldn't get around on my own >> a miraculous bionic eye... >> i'm seeing flashes >> great >> tech know, every saturday go where science meets humanity. >> this is some of the best driving i've every done, even though i can't see. >> tech know. >> we're here in the vortex. only on al jazeera america. >> this is aljazeera america. i'm thomas drayton in new york. let's get you caught up with the top stories at this hour. government forces under artillery attack in eastern ukraine as a ceasefire agreement crumbles. >> president obama's promise of immigration reform is now on hold. the politics behind that decision. >> occurred issue forces making in roads against islamic state fighters nearer bill in iraq. >> detroit's bankruptcy trial and what it could mean

news... [ ♪ music ] >>> hey, etch, welcome back to techknow.hil torres, with marr itema and costa. you and i had the opportunity to get up and personal with a creature that most people don't want to be up close and personnel with - sharks. both of us walked away from the experience with a love for the beasts. that's one of the reasons why this next story just off the coast of california is some good news. . >> reporter: return of the great white shark. no, it's not a b movie title, no conservationist can take credit for the script allowing it to happen. according to an international study led by the florida programme for shark research, the white shark population off the coast of california is much health year than previously thought. reachers statement more than 2,000 whites call the waters off the golden state home. a previous study conducted by stanford university in 2011 estimated 300 or so white sharks were in the same area. as for the why? the buffet line re opened. scientist involved in the study credit the resurgent to decades of state

caltech >>> this is "techknow", a show about innovations that saves lives. we explore hardware and humanity in a unique way. this is a show about scientists by scientists. let's check out the team of so-called nerves. lindsay moran, an analyst - new technology can make guns safer. does it work. we put it to the "techknow" test. kyle hill is a science writer with a background in engineering. tonight - earthquakes. they are frightening, devastating and can strike without warning. you. >> this red circle is what we have to worry about. >> announcer: they can. dr shini somara is an engineer and i'm phil torres, i'm an entomologist. that's the team, let's do some science. [ ♪ music ] >>> hey, guys. welcome to "techknow". i'm phil torres, with me kyle sil, cara santa maria, and lindsay moran. lindsay moran, the only c.i.a. operative - you are the in-house security specialist. you got me to look at a smart gun coming with controversy. >> that's right. we talk about the controversy later. first let's look at the technology. ironically after years of working for the

finches >>> ja this is techknow, a show about innovations that can change lives. we're going to explore the intersection of hardware and humanity and we're doing it in a unique way. this is a show about science by scientists. let's check out our nerds. dr shini somara is an engineer. tonight cars learning to communicate with each other. can cars equipped with electronic smarts reduce accidents and increase safety. we hit the streets and road test this new technology. >> oh, i did not do that. dr crystal dilworth is a molecular neuro >>> scientist. today not your average science project. meet the high school student who's extracuricular activity has scientists and others singing her praises. and i'm phil torres. i'm an entomologist. that's our team, now let's do some science. [ ♪ music ] >>> hey, guys, welcome to "techknow". i'm phil torres, joined by shini somara, and dr crystal dilworth. every year 30,000 americans are dying on the roads. this is still happening despite things like safety belts and airbags and active safety systems. shini, you looked at technolog

techknow. we're here in the vortex.nly on al jazeera america. >> thz al jazeera -- this is al jazeera. >> hello and welcome to the news hour, i'm martin martine dennisn doha. coming up on the program. >> israel is hamas and hamas is israel. >> sharing the goal of world domination. yrn town of kobani, as turkey sends its tanks to the

join the conversation: >>> hey, welcome back to "techknow."ni, you are showing us technology where cars are communicating with cars and infrastructure like stop light to make our driving experience safer, and now they let you behind the wheel. >> yes, i got to test drive a car with a v2v system, and the challenge was to drive as badly as possible. >> how did that go? >> i'll let you decide. let's take a look. >> reporter: so this is quite a blind spot, isn't it, because... >> you can't see past the tall bush there. it's hard to tell when traffic is coming by. >> reporter: tricky to paul out. a dreary day at general motors in warren, michigan gave me a dose of reality to test drive the v2v. >> as a drive, when you can't see the road you edge forward. i'll do what i would naturally do - edging forward. [ beeping ] coming. >> that's an advantage of v2 v. it works if you driver can't see approaching vehicles. >> reporter: general motors is one of nine major car-makers working together to make v2v a reality, an unusual teaming in a normally competi

. >> on techknow. we're heading to cutting edge cal tech campus >> here's a look at just a few of the students shaping the future of science >> see the latest research, discoveries and breakthroughs inside some of the worlds most advanced labs. >> how do you scale somethig you learned from a jelly fish? >> techknow every saturday go where science meets humanity. this is some of the best driving i've ever done, even though i can't see. techknow. we're here in the vortex. only on al jazeera america. >> forest whitaker has played many of his cash terse, his last role earning him an academy award. his role fighting for the children of conflict as a u.n.e.s.c.o. conflict for peace and reconciliation, the forest whitaker peace and development initiative that captured his heart. i sat with the oscar winner for a new edition of "talk to al jazeera". here is a portion of that interview. great to have you with us. i'm going to talk about the forest whitaker peace and development initiative, your u.n.e.s.c.o. goo

we'll see you next week here in "techknow." >> go to www.aljazeera.com www.aljazeera.com/techknow.low our contributers on facebook, google plus and more. >> on tech know, >> what if there was a miracle? >> grace's stem cells are in this box. >> that could save the live of your child... >> we're gonna do whatever we can >> would yo give it a try? >> cell therapy is gonna be the next big advance in medicine >> tech know, every saturday go where science meets humanity. >> this is some of the best driving i've every done, even though i can't see. >> tech know. >> we're here in the vortex. only on al jazeera america. $ >> this is al jazeera america. live from new york city, unanimity tony harris. russian'russia's directed open aggression, britain looks to crack down on its citizens going to syria. >>> body cameras, we will look at the push to make cameras mandatory for all police. and a high school in california makes changes to a controversial mascot.

we'll see you next week here in "techknow." >> go to www.aljazeera.com www.aljazeera.com/techknow.low our contributers on facebook, google plus and more. >> this is al jazeera america. live from new york city. i'm tony harris with a look at today's top stories. president obama vows justice will be served. and americans will not be intim dated after the islamic state group kills another u.s. journalist. and the seven steps required to remove russian troops from the

we'll see you next week here in "techknow." >> go to www.aljazeera.com www.aljazeera.com/techknow.low our contributers on facebook, google plus and more. >> against russia that actions have consequences -- >> just hours after a ceasefire, barack obama continues to threaten russia with sanctions. ♪ >>> hello there, i'm julie mcdonald in london. obama says the ceasefire in ukraine is a direct result of the pressure the west has put on moscow. looking to the future, nato announces a new rapid response force that has already angered the russians. also coming up, india's high court orders the release o

. >> on techknow. we're heading to cutting edge cal tech campus >> here's a look at just a few of the students shaping the future of science >> see the latest research, discoveries and breakthroughs inside some of the worlds most advanced labs. >> how do you scale somethig you learned from a jelly fish? >> techknow every saturday go where science meets humanity. this is some of the best driving i've ever done, even though i can't see. techknow. we're here in the vortex. only on al jazeera america. >> >>> this is al jazeera america, i'm thomas drayton in new york. we'll get you caught up with the top stories much vows of revenge after the u.s. and other countries launch air strikes in syria. the united nations russia lashes out at the u.s. over air strikes in syria, and claims america for the crisis in ukraine. >>> protests grow in hong kong as tens of thousands of

. >> on techknow. we're heading to cutting edge cal tech campus >> here's a look at just a few of the students shaping the future of science >> see the latest research, discoveries and breakthroughs inside some of the worlds most advanced labs. >> how do you scale somethig you learned from a jelly fish? >> techknow every saturday go where science meets humanity. this is some of the best driving i've ever done, even though i can't see. techknow. we're here in the vortex. only on al jazeera america. pass >>> welcome back. this fall the issues are more than the economy, security and education. in a race, voters will have to make a decision about a candidates character. democrats senator mary landrieu is trying to hold on to her seat. she made headlines at a football game. she appeared with sorority sisters, and wandered over to where a guy in purple asked her to perform a keg stand. it involved him being held upside down. republicans criticized landrieu for encouraging the consumption of alcohol. life. >>

>>> welcome to "techknow", rita, are the oranges and the limes trouble. >> one of the places where we make a lot of orange juice, there's a disease called citrus greening spread by a bug. it's devastating orange groves throughout the state. the jury is out in california. the bugs are making the way over here. biologists are trying to control the disease with another bug, a parasite that eats the bug that spreads the disease from the inside out. . >> reporter: you wouldn't know it at first clarnings but an en -- glance, but an epic battle of the bugs is taking place on orange trees in southern california. it's not only a matter of life or death for the insects. what is ultimately at stake is the survival of the citrus industry itself. california is responsible for 80% of the nation's fresh orange market.

. ♪ >> on techknow. heading to cutting edge cal tech campus >> here's a look at just a few of the students shaping the future of science >> see the latest research, discoveries and breakthroughs inside some of the worlds most advanced labs. >> how do you scale somethig you learned from a jelly fish? >> techknow every saturday go where science meets humanity. this is some of the best driving i've ever done, even though i can't see. techknow. we're here in the vortex. only on al jazeera america. welcome back, reminder of the top stories on al jazeera, protesters joined the call for electoral reforms in hong kong and tear gas on activists overnight and are camped out in a busy financial district. activists say the u.s. led coalition hit four provinces in the fight against isil and a gas factory was among the targets and over the weekend air strikes attacked refineries and a command center was also hit. ashraf ghani is the new president in the first democratic transfer of power and will head a government fol

. >> on techknow. we're heading to cutting edge cal tech campus >> here's a look at just a few of the students shaping the future of science >> see the latest research, discoveries and breakthroughs inside some of the worlds most advanced labs. >> how do you scale somethig you learned from a jelly fish? >> techknow every saturday go where science meets humanity. this is some of the best driving i've ever done, even though i can't see. techknow. we're here in the vortex. only on al jazeera america. >>. >> >>> u.s. air strikes destroy more i.s.i.l. target in syria. the fighters continue to assault a strategic town. >>> hello, welcome to al jazeera live from doha. i'm darren jordon. the eruption on mt ontake is believed to have killed 30 people. >>> thousands of protesters in hong kong are surrounding government headquarters to demand sa greater say in -- demand a greater say in elections. >>> a bomb blast in ka

techknow. we're here in the vortex. only on al jazeera america. >> i don't really know what's going to happen to me... >> of oscar winner alex gibney's hard hitting series... edge of eighteen >> i'm never going to appoligize for the type of person that i am >> facing tough challenges... >> we do feel cheeted, by the american university process >> taking a stand... >> it's gonna be on my terms, on how i want it to be >> boldly pursuing their dreams >> what did i do? >> the lives of american teenagers... on the edge of eighteen only on al jazeera america . >> in many ways, it was chelsea manning, wiki leaks and julian assange who first forced journalits t encryption a powerful tool and to do so on unprecedented scale. then came snowden. not many journalists can say they were there at the center of both stories the way james ball can. he was an in-house journalist at wiki leaks before joining the guardian where he worked on the snowden files with glen greenwald. you can bet the bulk of the e-mails relating to the nsa and g

. >> on techknow. we're heading to cutting edge cal tech campus >> here's a look at just a few of the students shaping the future of science >> see the latest research, discoveries and breakthroughs inside some of the worlds most advanced labs. >> how do you scale somethig you learned from a jelly fish? >> techknow every saturday go where science meets humanity. this is some of the best driving i've ever done, even though i can't see. techknow. we're here in the vortex. only on al jazeera america. >>> this is "talk to al jazeera" with me, ali velshi. this week we are at the clinton global initiative. before the break you heard from world bank president jim yong kim, now my interview with the president and c.e.o. of save the children, carolyn miles. one of the matters that we struggle with is recently the west bank said the united states is the third-most competitive country in the world. when we asked why the third most. it has the struggles about the deficit and budget. income equality is growing at a

we put it to the "techknow" test.

techknow. we're here in the vortex. only on al jazeera america. >> >>> this is al jazeera america, i'm thomas drayton in new york. we'll get you caught up with the top stories much vows of revenge after the u.s. and other countries launch air strikes in syria. the united nations russia lashes out at the u.s. over air strikes in syria, and claims america for the crisis in ukraine. >>> protests grow in hong kong as tens of thousands of pro-democracy demonstrators lock down the heart of the center. >> and how an artist and activist ai weiwei spreads a message of freedom around the globe. >> in a deeper look - the spotlight on the issue of racial violence. >>> we begin with breaking news out of ferguson, missouri. local st louis media report that police confirmed an officer has been shot. it appears the injuries are not fatal. this is the same area where unarmed teenager michael brown was fatally shot by police, sparking weeks of protest. today there's no exception. protests had been taken place, and appears to be an increa

and -- techknow accurate prime minister. we know at the same time there's disagreement about how to implement the deal. the president says ta he will sign the deal if the houthis dismantle protest camps and pull out the fighters. houthis say they'll continue with their protest movement, until the deal is fully implemented. >> yemen's fighters prepare to shell houthi areas in the prove yins. in this desert, the army has a preps, relying on battle hardened militias. >> translation: the houthis are criminals, invading our lands, killing people and destroying our homes. houthis are the same. >>> tribes are trying to mediate a political deal. with a long history of mistrust, it is an obstacle both sides are unable to overcome. the intense fighting undermined all chances to secure a ceasefire, i'm working hard on a deal. >> reporter: civilians were caught up in the fighting, houses destroyed. hundreds had to flee from the area. this woman's son was killed, her house destroyed. >> my son was innocent. he was looking after the famil

we put it to the "techknow" test.

. >> on techknow. we're heading to cutting edge cal tech campus >> here's a look at just a few of the students shaping the future of science >> see the latest research, discoveries and breakthroughs inside some of the worlds most advanced labs. >> how do you scale somethig you learned from a jelly fish? >> techknow every saturday go where science meets humanity. this is some of the best driving i've ever done, even though i can't see. techknow. we're here in the vortex. only on al jazeera america. >>> you may remember a wild and dramatic video of a gaol break at this tennessee facilities, eight of the young offenders involved face an extra year in custody. the dramatic accept is putting the youth detention center at the forefront of a debate on how to care for troubled young people. lori jane gliha has the story from tennessee, where the community is fired up and one acceptee is still on the run. >> reporter: teens armed with sticks and rocks attacking guards. that was the scene in early september at t

techknow. we're here in the vortex. only on al jazeera america. >>> welcome back, a reminder of the top stories on al jazeera. ashraf ghani has been sworn in had afghanistan's new president. the first democratic trancics of power. he'll head a unity government following a power sharing deal with abdullah abdullah. >>> a call for electoral reform. riot police fired tear gas. >>> activists say the u.s.-led coalition hit four syrian provinces in the fight against i.s.i.l. an air base and gas factory among the targets. three refineries were attacked overnight. the command center was also hit. >> india's prime minister has been given a rock star welcome in new york. thousands of americans greeted narendra modi at maddison square garden, a turn around for a man once banned from entering the united states. >> reporter: just a few years ago narendra modi was denied a u.s. visa, the only person to fall fall of the u.s. international freedom that sanctions violations of religious freedom. that was then. now he is feted by 20, 500

techknow. we're here in the vortex. only on al jazeera america. >> now a snapshot of stories making headlines on "america tonight." authorities in ferguson missouri, the officer was checking on a community center when he was shot in the arm. there is no evidence that it was connected to the protests over shooting of michael brown in august. >>> volume cak volcanic eruption of a mountain in japan. searchers are still looking for survivors. the man who hopped the white house fence made it further than previously reported. omar gonzalez who was armed with a knife was finally taken down outside the door to the green room. the head of the secret service will be questioned by a hearing at the house oversight and government reform committee. >>> forceful language from the israeli prime minister benjamin netanyahu at the united nations, as he draws a straight line on israel's strikes on gaza to u.s. strikes on i.s.i.l. two branches of the same in his words poisonous tree with according to him the same mission. >> hamas's immedi

welcome to techknow. guys, i've got some stats for you. california is currently having the driest year in 90 years. over 60% of the west is in a drought. now, when it's that dry, there is one danger that really comes to mind. >> that's: wildfires. as common as these are, it has not with been until recent years that scientists understood how they move and how to save fight them. . >> california's governor declared a state of emergency wildfire. >> i want to make sure that the researchers are deployed. >> summer, 2014, in america's west is under fire. making national t.v. headlines for both the size and ferocity of the burns. >> fire world emerging from the parched hillside. >> the end of fire season is nowhere in sight. >> we are seeing near unprecedented drought. so what that means is we have seen the beginning of fire season much earlier. some even say that last fire season truly never ended. and we are going to probably see this fire season extend much longer than normal. >> this is the first day that we are on the scene. the crews are s

on the next episode of techknow, we get an up-close look. we see what it can do. that's why people are excited. not just because what it can do now is proven in clinical trials, but the fact that we don't think we can do anything. >> joining us is crystal dilworth. >> this is not a father, elelent roe shocker or therapy. >> this is not like "one flew over the cuckoo nest." >> it's not the whole brain, areas. >> how does it work. >> depending what area of the brain you want to target, you position the electrodes. >> you rain an elect rode. you are area. hurt. >> my good friend, a "techknow" contributor had the technique down to her. you'll have to watch the piece. >> medicine works, changing the brain's chemistry. how is this supposed to work in effect what goes on in your brain. the way that neurons behave transmit electronically and chemically. when you take a drug you affect the stimulation. when we pass an electronic current, the brain speaks both languages. it's a lot more specific nan taking a drug. you ingest the drug. it affects the brain. >> this is target

. >> on techknow. we're heading to cutting edge cal tech campus >> here's a look at just a few of the students shaping the future of science >> see the latest research, discoveries and breakthroughs inside some of the worlds most advanced labs. >> how do you scale somethig you learned from a jelly fish? >> techknow every saturday go where science meets humanity. this is some of the best driving i've ever done, even though i can't see. techknow. we're here in the vortex. only on al jazeera america. >> now a snapshot of stories making headlines on "america tonight." authorities in ferguson missouri, the officer was checking on a community center when he was shot in the arm. there is no evidence that it was connected to the protests over shooting of michael brown in august. >>> volume cavolcanic eruption a mountain in japan. searchers are still looking for survivors. the man who hopped the white house fence made it further than previously reported. omar gonzalez who was armed with a knife was finally take

. >> on techknow. we're heading to cutting edge cal tech campus >> here's a look at just a few of the students shaping the future of science >> see the latest research, discoveries and breakthroughs inside some of the worlds most advanced labs. >> how do you scale somethig you learned from a jelly fish? >> techknow every saturday go where science meets humanity. this is some of the best driving i've ever done, even though i can't see. techknow. we're here in the vortex. only on al jazeera america. >> investigating a dark side of the law >> they don't have the money to puchace their freedom... >> for some...crime does pay... >> the bail bond industry has been good to me.... i'll make a chunk of change off the crime... fault lines... al jazeera america's hard hitting... >> they're locking the door... ground breaking... >> we have to get out of here... truth seeking... >> award winning, investigative, documentary series. chasing bail only on al jazeera america next. >>> today's data dive assumes the risk

president >> who should answer for those people scomplrning welcome back to "techknow." ."a, 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 risin

accurate government within a month of the -- techknow accurate government within a month. the new government must be inclusive of all representatives of the society. the duties of the government will be delegated. within three days of signing the deal the president must appoint two political advisors, were from the southern peace movement. a new non-part stan prime minister must be appointed. >> another special body will be tasked with resolving the security situation in the northern areas, that are now under houthi control. the agreement did not clearly say when the fighters will pull out from the capital, or when they'll put down their arms. >> the houthis said that their campaign to topple the government will come to an end once the deal is fully implemented. 9 offensive started from a strong hold in the north. from there they surged south, taking a string of important cities, before reaching the capital. >> in sanaa, the supporters stabled demonstrations demanding an inclusive government and cuts to prices. some say the real goal is to cease power. >> the latest violen

. ♪ caltech caltech >>> this is "techknow", a show >>> this is "techknow", a show about innovations thatations that saves lives. lives. we explore hardware and humanity we explore hardware and humanity in a unique way. in a unique way. this is a show about scientists this is a show about scientists by scientists. by scientists. let's check out the team of let's check out the team of so-called nerves. so-called nerves.

up next, "techknow" correspondent phil torres. on are prevention of head injuries in the field. threat. >> bombs are cracking off in the distance... >> this is a booby trap in the islamic state >> ...a sniper around the corner here... >> from the front lines, josh rushing reports, on al jazeera america vé... news... >> yes, football fans, nfl season has already kicked off and with it this year comes a wave of you in head-protecting technology. last year there were 152 concussions in the nfl reported putting players at risk for injury. long term. even worse. al jazeera "techknow" host phil torres joins us with a story from culver city, california. phil. >> hey joie. from reebok to century to revel, the epidemic hitting the nfl. this is the latest helmet from redell and players will be wearing it. >> the reflex helmet is the most aggressive helmet manufactured by redel. the front pad not only compress but allows it to absorb impact injury and reduce forces because it's sheering in area that's more flexible. >> one of the largest hel

al jazeera "techknow" host phil torres joins us with a story from culver city, california. phil. >> hey joie. from reebok to century to revel, the epidemic hitting the nfl. this is the latest helmet from redell and players will be wearing it. >> the reflex helmet is the most aggressive helmet manufactured by redel. the front pad not only compress but allows it to absorb impact injury and reduce forces because it's sheering in area that's more flexible. >> one of the largest helmet manufacturers trying to respond to what is called emergency hitting the fields. nebraska's home team game when this happened. when a player gets a concussing blow, the brain can bounce around or 20s in the skull. that -- or twist in the skull. so what kind of hit is likely to land a player in the hospital? rather than the end zone? and how do you reduce a player's risk of concussion? stefan duma head of virginia tech's biomedical engineering department has spent the last decade studying the hokies to answer that question. the head impact them tri system or hits for short. -- telemetry system or hi

and a contributor to techknow. great to have you back on the show. this is not your father's electro shocker or electro shocker, it's different to what we see in "one flue over the cuckoo's nest." >> that's right, it's very different. >> how does it work, you put electrodes on someone's head. >> that's correct. you position the electrodes depending on the need and you run electrodes at a small level. >> they say it doesn't hurt, but people don't know what is happening sometimes. >> my good friend cara santa maria had this done to her. you'll have to watch the piece to see what happened. >> medicine works, changing the brain's chemistry. how is this supposed to work in effect, what goes on in the brain. >> the way that neurons behave. they transmit information electrically and chemically. when you take a drug you affect the chemical stimulation. when we pass an electric current, you talk about electricity. the brain speaks both lang wedges. the thing is it's a lot more specific than taking a drug. you ipp guest the drug, it goes in your blood streams.

up next, "techknow" correspondent phil torres. on are prevention of head injuries in the field. >> a crisis on the border >> they're vulnerable these are refugees. >> migrant kids flooding into the us. >> we're gonna go and see who's has just been deported. >> why are so many children fleeing? >> your children will be part of my group... >> fault lines, al jazeera america's hard hitting... >> there blocking the door... >> ground breaking... >> truth seeking... >> we have to get out of here... award winning investigative documentary series... no refuge: children at the border only on al jazeera america >> it's a chilling and draconian sentence... it simply cannot stand. >> this trial was a sham... >> they are truth seekers... >> all they really wanna do is find out what's happening, so they can tell people... >> governments around the world all united to condemn this... >> as you can see, it's still a very much volatile situation... >> the government is prepared to carry out mass array... >> if you want free press in the new democr

. ♪ >> on techknow.eading to cutting edge cal tech campus >> here's a look at just a few of the students shaping the future of science >> see the latest research, discoveries and breakthroughs inside some of the worlds most advanced labs. >> how do you scale somethig you learned from a jelly fish? >> techknow every saturday go where science meets humanity. this is some of the best driving i've ever done, even though i can't see. techknow. we're here in the vortex. only on al jazeera america. ♪ >>> it's time now to check in with one of the victims we have been followed -- one of the families we have been following as part of our series rebuilding the american dream. tonight a troubling development for the williams family. stephanie williams landed a higher-paying job mentoring math teachers. but that meant the family of six had to move into the city. so they left their suburban home which is underwater, meaning they owe more than it is worth. they were renting a duplex, then they received the news that th