dow chemical which bought union carbide in 2001, the definitive end to this case could bring much needed needed intersection of hart ware and huge -- hardware and humanity. let's check out the team. marita davison is specialising in ecology. tonight, what are the scientists at monsanta up to. we go into their lab.

the toxic legacy continues to this day as both union carbide and its current owner, dow chemical, haverefused to pay for clean-up. a new report finds the federal government has fast expanded its use of undercover agents with officers from at least 40 agencies posing in roles ranging from welfare recipients to protesters. "the new york times reports these of undercover officers has expanded to virtually every corner of the federal government, including the department of education, nasa, and the smithsonian. police disguise themselves as due to protesters at demonstrations over issues like abortion. ferguson, missouri newly released video footage , shows the police officer who shot unarmed african-american teenager michael brown threatening and arresting a resident for filming him last year. the video posted to youtube shows officer darren wilson after he arrived at a home to serve a summons. the resident asks his name and wilson threatens to "lock [his] ass up." listen carefully. >> what is your name, sir? >> [inaudible] >> sir, i am recording this incident, sir. do i not have the right

dow chemical which bought union carbide in 2001, the definitive end to this case could bring much needed needed intersection of hart ware and huge -- hardware and humanity. let's check out the team. marita davison is specialising in ecology. tonight, what are the scientists at monsanta up to. we go into their lab. are they moving away from genetically modified crops. dr crystal dilworth is a molecular science and cara santa maria haa bank ground in science. i'm phil torres, an endometeorologist. tonight spiders and goats - and howe may hannes spider -- harness spider silk. that's the team, let's do some science. ♪ music ] >>> hey guys, welcome to "techknow." what does the bulletproof vest have to do with goat's milk. the answer ls in spider silk - of all things. i got a chance to look at the future of fabrics. it is fascinating. let's take a look. >> reporter: they are natu's masterful architects, genius at structural design. their silk - though just a fraction of the size of a human hair, is stronger than steel and more powerful than tevlar. you have called spider silk the ancient bioma

dow chemical, which bought union carbide in 2001, has been summoned to appear in court on the 12th of november. that could bring much needed closure. >> still ahead on the news hour, we'll fly you into beautiful patagonia. and we go to sport next. >> scared as hell... >> as us combat missions end in afghanistan >> they're going to make plans for an attack. >> the only thing i know is, that they say they're not going to withdraw. >> get a first hand look at what life is really like under the taliban. >> we're going to be taken >> it's so seldom you get the access to the other side >> fault lines, al jazeera america's hard hitting... >> today they will be arrested... >> ground breaking... they're firing canisters of gas at us... emmy award winning investigative series... special episode on the front lines with the taliban on al jazeera america >> welcome back. let's take you to pat gone y one of the most remote locations on earth. but the region's delicate ecoregion is under threat from overgrazing, but an american couple is trying to counter that in an unique way. we go to southern chi