on the environmental community today saying this about the role of carbon dioxide emissions and climate change. >> no, i would not agree it is a primary contributor to the global warming that we see. >> it is not the first time pruitt hinted he is a climate change denier. last year he wrote the debate is far from settled. but he seemed to change his tune during confirmation hearing last month when he was asked if he agreed with president trump who called climate change a hoax on. >> i do not believe that climate change is a hoax. >> reporter: today's apattern change of heart, infurated environmental groups. the sierra group said the arsonist is in charge of the fire department. director of climate science with the union of concerned scientists. if you were talking to mr. pruitt what would you tell him? >> listen to the scientists. 97% of scientists studied climate change agree that car been dioxide is the primary cause of human driven climate change. >> reporter: in january, nasa confirmed, that rising temperatures are driven largely by increased carbon dioxide and human made emissions into the atmosphere. this is still on the website of pruitt's, epa, carbon dioxide the primary green house gas contributing to recent climate change. pruitt's comments appear to be a sign of things to come. scott, the trump administration preparing to role back obama administration regulations that limit c 02 emissions from cars and power plants. >> chip reid, thanks. >> today the head of u.s. forces in the middle east, general joseph otell told senators more american troops are needed to beat isis in syria. that's on top of 400 that recently joined u.s. special operations forces backing emission to retake raqqa, the isis capital in syria. the u.s. is also supporting iraqi forces in their fight to liberate the city of mosul from isis. and holly williams is on the front line. >> mosul is shattered. iraqi forces, pounded isis. and the people of this once wealthy city, fled with their bundles of possessions. sometimes with just the clothes on their backs. a part of the world so ancient it is mentioned in the bible. now, brought to its knees. in the neighborhood, around 150 yard from the front line, mohammad yunis made it to safety with his young fame loo. he told us isis fighters are hiding in people's homes. including four in his. before it was hit by a mortar. as the the iraqis claw back one street at a time, isis has smashed its way from house to house. so its fighters could move without being detected from the sky. iraqi forces claimed they recaptured mosul's many government building on tuesday. but today we couldn't get within a block of it, the general told us isis is still sniping at his men. contesting every inch of territory even as it is forced to retreat. and when isis is finally pushed ou mosul, which could be in weeks, scars will remain. assan ali fled with his wife hallah and five children. but told us they had to leave behind the body of his father, after he died a week ago. the u.s. has spent around $12 billion combatting isis in iraq and syria. and scott, america's top general in the fight recently predicted that both mos of theul and raqq be recaptured within six months. >> holly williams with the battle of mosul. holly, toungp next, impostor fr how to spot a phony. ♪ i'm joy bauer, and as a nutritionist i know probiotics can often help. try digestive advantage. it is tougher than your stomach's harsh environment, so it surivies a hundred times better than the leading probiotic. get the digestive advantage. the irs said today its crack you on identity theft has cut the number of fraudulent tax refund nearly in half. but another type of fraud is on the rise. anna werner says more than 400,000 americans fell victim last year to impostor scams. richard tanner says the call took him by surprise. >> i literally was about to hang up when they said, are you at this address? it was my po box i have had many, many years. >> reporter: the man on the other end said he was with the sheriff's department. and tanner owed fines of $1600 for failing to appear for jury duty. >> he immediately launched into this very polished sounding, i mean, very authentic sounding speech about -- we are calling you as a courtesy. you have several outstanding citations. >> reporter: tanner told him he served jury duty. but the sergeant gave him case and citation numbers. he instructed tanner to pay up immediately or face a warrant for his arrest. the call went on for nearly 40 minutes on his land line before tanner used his cell phone to call the local sheriff's department. >> the first thing i said, is there a sergeant wade marshal. and i barely got the word out when the, the real sheriff's department said, no, scam, hang up. >> law enforcement would never make request. >> reporter: director john bolen says it is a growing problem nationwide. >> the scammers are well versed in the judicial process. they have frequently used real judge's names, real names of u.s. mar sham sshal service emp spoofed numbers to federal courts and offices. >> monica is with the federal trade commission. >> there are probably a lot of people out there, who are hearing this, saying, huh, i wouldn't fall for that? >> but the fact of the matter is when you got one of the calls. they sound really, real. scammers are very, very good at making you believe that you have got an emergency situation on your hands. and they have a really powerful way of getting you to act on that. >> reporter: some red flags with scams, they typically call you on the phone. most government agencies will send you a letter. and scammers often ask to be paid with gift or prepaid cards which the government won't do. the best advice for consumers who get calls look these, scott, just hang up. >> be warned. anna werner for us. thank you. still ahead, flying dogs. on a life saving mission. ♪ bite into magnum double caramel... ♪ and unleash your wild side. ♪ ♪ made with silky vanilla bean ice cream and rich belgian chocolate. ♪ discover magnum. it's league night!? 'saved money on motorcycle insurance with geico! goin' up the country. bowl without me. frank.' i'm going to get nachos. snack bar's closed. gah! ah, ah ah. ♪ ♪ i'm goin' up the country, baby don't you wanna go? ♪ ♪ i'm goin' up the country, baby don't you wanna go? ♪ geico motorcycle, great rates for great rides. up again. wall street bull market turned eight years old. today. since stock prices bottomed out on march 9, 2009, during the great recession. the dow is up well over 200%. a rising tide of popularity has made water the best selling drink in america. an industry research group told us today the average american drank more than 39 gallons of bottled walter later compared t gallons of ,,,,,,,,,,,,,, we end to night with four legged recruits in the war against poachers. debora patta now on the canine airborne. >> reporter: meet aeroand his handler. together they take off across the vast wildlife preserve. aero seems unperturbed as they hurdle out of the helicopter, falling more than 6,000 feet to ear earth. landing in the middle of the poaching wars. >> getting the dog on to the front lines as fast as possible is always a challenge. parachuting is one of the ways in getting the dog boots on the ground. [ indiscernible ] elite canine dogs are trained to sniff out the poacher. rushing to attack. pinning him to the ground until more help arrives. this may be a training exercise, but the dogs bites are reels. and special bite proof suits are needed. the dogs are up against highly trained heavily armed poachers who run a multimillion dollar industry trading in elephant and rhino horn. in the past seven years alone, a third of africa's elephants have been wiped out. nearly 100 of the skydiving dogs have been placed in game reserves across africa. in one region they caught over 100 poachers in 18 months. he told us one dog, killer, nabbed more poachers than rangers equipped with the latest high tech weapons. >> that its the most effective tool against the fight against poaching. ever used. and it is technology. low cost completely compared to other technologies, it works. >> man's best friend may turn out to be a poacher's worst enemy. debora patta, cbs news, johannesburg. that's the "overnight news" for this friday. for some of you, the news continues. for others, check back with us a little later for the morning news and be sure not to miss "cbs this morning. "from the broadcast center in new york city, i'm scott pelley. ♪ ♪ this is the cbs yoipz. welcome to the "overnight news," i'm tony dokoupil. president trump's executive orders on immigration and travel, an exodus to canada. making their way north of the border free to apply for asylum. jericka duncan has the story. >> you know that is illegal what you are doing? >> warning from canadian police are mostly ignored. >> you speak english. >> towing her baby, this woman struggled through the snow. >> refugee. okay. >> to claim asylum in canada. she its among the hundreds of u.s. refugees who have illegally entered canada since president trump's first immigration order. u.s. refugees who cross at an unguarded part of the border are arrested. but once on canadian soil, they are allowed to claim asylum. at an official border crossing, they would be turned away. a record 724 u.s. refugees, a 700% jump over the same period last year, walked into quebec last month. >> well are beth 2 1/2 miles away from the main port of entry. >> the staff sergeant says he has seen the desperation firsthand. >> some body crossing barefooted. you can tell the people, are not used to the climate and all that. or, they're not dressed properly. >> reporter: we weren't able to talk to any of the refugees, but immigration lawyers told us most are fearful they might be deported from the u.s. >> two subject crossing. >> reporter: surveillance cameras allow police to monitor the new arrivals from this command post. some arrive by cab. dropped just a few feet from the border. this family is from colombia. >> usually the route that they, the migrants will use to cross into canada. negotiating across the snow bank has become a familiar part of the job. a syrian family arrived in below freezing temperatures, getting some help before being arrested. but not all make it. >> can't cross here. illegal. >> this pregnant nigerian woman fell a few feet from canada. caught between canadian and u.s. officers she appeared confused and upset. >> do you have a passport? >> a visa. >> without proper documents, she was arrested. >> a journey more seemed willing to risk. jericka duncan, cbs news, new york. the white house now says it has no rooeason to believe president trump is target of an investigation. press secretary sean spicer shed no new light on the president's weeken treepz the prior administration wire tapped his phones. >> reporter: press secretary sean spicer said the white house is still not sure whether or not the president is under investigation. >> i am not aware of it. that's my point. we are not aware of anything. >> you haven't been told by the justice department there is no investigation. so there might be one. you just don't know. >> right. i said i am not aware. i am not aware. >> the justice department is saying they never gave you assurances that you gave us. >> no, no, the assurance i gave you is that i am not aware. some one asked if i am made aware, the answer is no. the answer is no. spicer says the president has not asked the fbi for answers and would appear inappropriate if he did. members of congress contacted burt row for information as a taxpayer funded proed. senator lindsay graham. >> not too much to ask the department of justice and fbi whether or not a warrant was sought and issued. >> reporter: attorney general jeff sessions recused himself last week from any trump campaign relate investigations. beaver that he had rebuffed calls to apin the a special counsel for an independent probe. but today he said he might kid one to investigate obama era scandals. >> i'm going to do everything i possibly can to, to restore the independence and professionalism of the department of justice. so we will have to kid whether outside special counsel its need the. >> overseas, battle for mosul continues to rage. iraqi, kurdish forces outnumber the fighters 10-1. isis gunmen are ready to feet to the death. holly williams has two records from the front lines. >> reporter: mosul is shattered. iraqi forces, pounded isis. and the people of this once wealthy city, fled with their bundles of possessions. sometimes, with just the clothes on their backs. a part of the world so ancient it is mentioned in the bible. now, brought to its knees. in the neighborhood, around 150 yard from the front line, mohammad yunis made it to safety with his young family. he told us, isis fighters are hiding in people's homes. including four in his before it was hit by a mortar. as iraqis claw back, one street at a time. isis smashed its way from house to house. so its fighters could lose without being detected from the sky. iraqi forces claimed they recaptured mosul's main government building on tuesday. but today we couldn't get a block of it. the general told us isis is still sniping at his men. contesting every inch of territory, even as it forced to retreat. and when isis is finally pushed out of mosul, which could pea in weeks, scars will remain. hassan ali fled the city with wife hallah and five children. but told us they had to leave behind the body of his father. after he died a week ago. it looks like a toy plane. and sounds -- like a lawnmower. but the rq 7, bb 2 is a 1.5 million dom lllar drone, the u. military calls it the shadow. in the skies above mosul, it allows the american co-l coalit this. call in air strikes, targeting isis owe sixes. sergeant joe pinchot, drone pilot with 82nd airborne division in northern iraq. surveilling the battlefield in incredible detail from the back of the humvee. >> vehicles they're driving what they're wearing easy to tell. >> you can see what people are wearing? >> enough to make out if they're american or not. can't read name tags. i can tell what they're wearing. >> reporter: the average age of the drone pilots in shadow platoon is just 22. many of them keen video gamers. their screens here too secret to show you. >> how is it different to a video game? >> well, much sloper paced. graphics aren't quite as the good. the controls aren't quite the same. sort of like a video game. but nobody would buy it to play this video game. >> reporter: isis has its own drones, which it uses to guide its suicide bombers. which they have even adapted to drop munitions. for the most part, extremists rely on low tech weapons, like wieflz a rifles and explosives. america's military technology is gradually beating back the enemy. holly williams, cbs news, guyara west airfield, iraq. i'm joy bauer, and as a nutritionist i know probiotics can often help. try digestive advantage. it is tougher than your stomach's harsh environment, so it surivies a hundred times better than the leading probiotic. get the digestive advantage. believe it or not, more than half all fruits and vegetables grown in the united states are actually thrown away. because they're rotten before they can be eaten. one company may have found a high tech solution to that. ben tracy reports. >> reporter: on this lush hillside farm near santa barbara, it is not just the views that grab your attention. but the rare produce on the trees. including these aptly names caviar limes. once you pick it, there is, there is a timer going off. caviar limes are the prized by restaurants and bars because of their acidity and texture. they last a week to ton days after they're picked. making shipping and distribution difficult. that's where appeal sciences, james rodgers comes in. ruskey teamed up two years ago. >> we use food to preserve food. that simple. they start with organic material like frozen grape skins. they then extract food molecules and mix them up in different combinations. the powder called edipeel is mixed with water sprayed on produce. >> when it dries it leaves behind a barrier of plant material on outside of the produce. that thin barrier slows down the rate that water gets out of the produce. and it slows down the rate that oxygen gets in. by dpoing that we can preserve the shelf life. >> how much longer does the average piece of fruit last with your product on it? >> each produce has different -- characteristics, we can get extensions from twice shelf life of a piece to five times the shelf life. >> you are monitoring how the lemon is dying over time? >> exactly. >> this time-lapse room where they study the results. by day five, the untreated strawberries on top rot. but the treated ones on the bottom are still good to eat. it is fda approved. the thin layer it leaves behind is edible and tasteless. it would replace the wax that is often used on grocery store produce. you are going to have some people who look at this and say, this is frankenfood, i don't want something sprayed on my food that remind me of a pesticide. how do you get over that hurdle with the people? >> the way we fry to do this is try to be open with people about exact plea what we are doing. so we are taking stuff you are eating already in every bite of your produce. we are just reapplying exactly where it is, on the produce. putting it on the outside. >> reporter: the company hopes their product will help with global hunger in places without access to refrigeration and could reduce food waste. here in the u.s., 24% of produce its tossed out before it reaches the grocery store. another 2% is thrown out at home. but food waste experts say no one technology is going to solve a problem this big. >> fundamentally this problem is driven by our habits around food. and soap we can't technology our way out of that. i think it need to be paired with careful shopping. >> reporter: apeel raised $40 million from investors. right now work with several growers in talks with large produce brands. it remains to be seen if those using the product would pass the cost along to consumers. for farmers like rusky, apeel is buying him valuable time. >> been able to do, two, three times the shelf life. super happy to see the results. >> been tracy, santa barbara, california. >> in a lot of inner city neighborhood it can be difficult to track down fresh fruits and vegetables much less healthy food on the go. one startup in southern california dedicated to bringing, healthy affordable fast food to everyone. >> reporter: the people behind this l.a. storefront nestled in a neighborhood made up of fast food chains and second hand shops are trying to change the way residents here eat. >> what we are doing is making healthy food affordable for everyone. the real mission and the ethos of the company which its that no matter where you are born, no matter where you live within the u.s. we think everyone deserves access to healthy, fresh, delicious food. >> food is made by some of the best chefs in the country. >> the co-founder, sam polk and david foster left their jobs in finance to do something purely good in the world. but their business is still based on hard numbers. >> briefly describe every table for me. >> we price our meals so that -- everyone in the neighborhood can afford them. so here in south l.a., where per capita income is $13,000 a year. our meals sold for $4. in more have flaw end aaffluent the same stores, selling the same food, but for $8. >> the idea for every table grew out of a nonprofit creation, groceriship groceriships, educates families on how to eat nutritious meals. they found education wasn't always enough. they wanted to make healthful eating simple. by bringing premade meals to areas where quick and easy often means high calorie and low new trgsal quality. >> do you find that people are surprised when they walk in and see what they get for the same price of a value meal at a fast-food restaurant. >> totally. i think they're surprised at the price. they're also surprised at the quality and selection of the food. we design this menu so that it would work very well in brentwood, but also in inglewood, what that meant for us talking to the families we were working with through groceriships, to basically find out what they wanted to eat. so that grew into a menu, that celebrates the cultures and cuisines of los angeles. >> the menu include everything from jamaican jerk chicken to a california cobb salad. all cooked not on site but a central kitchen a few miles away. further reducing costs. >> the whole thing has been designed to to be as economical as possiblement . we are not producing meals here in the store at each store. having the small footprint stores, that enables us to save on rent and labor and the combination of the two things, enables us to price at a level that gets some people to laugh. >> this is the tamale, seasonal. >> jess ska speica spear is the chef. >> delicious. that's healthy? >> it's healthy. >> obvious question, how crucial is flavor when you are trying to make a community not used to eating healthy, eat well. >> they're used to a certain flavor and thing that resonates home to them. so if you don't hatch the right flavors in there, completely something that they don't understand, they're not going to eat it. >> reporter: which is something every table employee, juan bravo has seen firsthand with his father. >> heap is t is traditional, me guy, used to red meat, beans. but he also has the got diabetes to deal with now. and other conditions. and -- he is coming around. now he is -- he is -- never had kale before, until now. now he has checken caesar kale salad. isn't it great? >> also changing is the way organizations like every table on rate. with a mission you would associate with a nonprofit. every table is every bit of business. one committed to doing well, by doing good. >> we believe in the power of nonprofit, charity. think there will be a place for that in society. >> can create a profitable company that fully expresses our humanity taz well. we want to make money. be profitable. we also want to do work that we connect with on a heart level. to lift all of us up. meta appetite control... it helps put some distance between you and temptation. clinically proven to help reduce hunger between meals. from metamucil, the #1 doctor recommended brand. >> i'm alex trebek. if you're age 50 to 85, this is an important message. so please, write down the number on your screen. the lock i want to talk to you about isn't the one on your door. it's a rate lock for your life insurance that guarantees your rate can never go up at any time, for any reason. but be careful. many policies you see do not have one, but you can get a lifetime rate lock through the colonial penn program. call this number to learn more. this plan was designed with a rate lock for people on a fixed income who want affordable life insurance that's simple to get. coverage options for just $9.95 a month, less than 35 cents a day. act now and your rate will be locked in for life. it will never increase. your coverage can never be cancelled as long as you pay your premiums, and your acceptance is guaranteed, with no health questions. you cannot be turned down because of your health. call for your information kit and gift. both are free, with no obligation. don't wait, call this number now. ♪ ♪living well come on up, grandpa don't let joint discomfort keep you down. come play with us! i'm coming. upgrade to move free ultra's triple action joint support for improved mobility, and flexibility. it also provides 20% better comfort than glucosamine chondroitin, all from one tiny mighty pill.... get in there with move free ultra, and enjoy living well. ♪living well there is an ancient spice from india that is finding a lot of modern uses here in the united states. lee cowen has the story of the latest super food. not far from the surfers paradise on the hawaiian north shore grows a spice as golden as a hawaiian sunrise. that might just offer our bodies the same kind of healthy glow. it's called tumeric, member of the ginger family. that before it is washed looks a bit like an ugly carrot. >> tumeric, not a root, but a risome. which means its stem is where the good stuff is found. native to india, tumeric around thousand of years only recent leap caught on in the west. now people can't get enough. >> this year, do you know how many thousand of pound of tumeric you will ship out. >> tonnage. tonnage. major tonnage. phil green and wife linda bought this 45 acre farm over a decade ago. >> oh, man, beautiful day isn't it? >> yeah. >> reporter: they planned a semiquiet retirement. until tumeric became one of most talked about superfoods. >> did you know what it was? >> barely. to me, tumeric was a powdered spice in a jar that, that stayed on your shelf until you made a curry recipe, you know. >> reporter: curries are most common use. but tumeric's taste is part of its allure. scattered to the wind, a sacred part of hindu ceremonies. and used as dye for fabrics. it is what gives mustard the bright yellow hugh, the very thing that makes tumeric, powerful, a compound, what some researchers say makes it a powerful weapon against disease. >> you are doing clinical trials on alzheimers disease, parkinson's, arthritis, diabetes. >> seems to have an effect? >> absolutely. such a wonderful compound, that it has been shown to work. in every single instant people tried. >> the bio physicist has been studying medicinal qualities at baylor medical center in dallas. he says thousands of studies have shown that in a concentrated enough dose, the tumeric is proven to be an antioxidant and anti-inflammatory, but also shows promise in preventing and even treating something as serious as cancer. >> you are frying trying to und what are the processes and mechanisms. >> you know it works most part. not sure why. >> yes, exactly. >> reporter: while he says more research needs to by done. the word is already out at trend setting restaurants. like cafe gratitude in los angeles. here, tumeric mixed with steamed almond milk. or, blended into a shot. served with a dose of cayenne pepper. >> that is spicy. called i am brave. tumeric, ginger, lemon. >> cafe gratitude's co-owner, ryan. >> in a petri dish that could knock out diseases. >> yeah, it's got a kick. >> it's crazy. it's become a phenomenon. it is the buzzword in the health world. >> reporter: so much so, google's food trend report called tumeric, a rising star of 2016. >> is it as the good as all of the hype? is it as healthy? as good for us? >> people love it. they come back for it. do i exactly know what it is providing for people? no. >> the greens aren't sure either. but if it is both healthy and a cash crop, so be it. >> farmers grow what people want. what people demand. and so -- we, we kept increasing because -- it kept selling. >> we have all heard the advice, eat the colors of the rainbow. here in hawaii, this brightly colored spice, just might be the pot of gold at the end of one too. ,,,,,,,,,,,,,, in most parts of the american west, the world of the cowboy has long since passed. replaced by shopping malls and interstate highways, but for one afternoon, at least, cowboy justice rode off the ranch into a wal-mart parking lot. steve hartman explains. 28-year-old robert borba one of the last of a kind. a real, honest to goodness, cow roping cowboy. robert works at a ranch outside eagle point oregon. but we didn't come here to see his prowess in the cow corrals. we came here because of what he did recently amongst the cart corrals of this wal-mart parking lot. >> it happened so fast. few months ago, robert moseyed over to the wal-mart for dog foot. and on the way out, he heard a woman screaming. >> stop him. stop him. he stole my bike. stole my bike. kind of look around. then all of a sudden the guy goes whizzing guy on the bicycle. >> as the security cameras show. no way to catch him on foot. so the cowboy did what cowboys do. he saddled up to save the day. armed with little more than a lasso. >> couple swings. then i threw it at him. just like i would steer. >> he had to be blown away, what is going on? >> like what are you doing, man? you got a badge? no i ain't got a badge. >> lot of people were incredulous. >> 911. >> the cavalry arrived. led by chris adams. >> i looked up from the horse. a rope attached. holding on to a tree. >> it's real. it was real. in fact here is a picture. on the left see the suspect. roped, tied like a steer headed for the pen. you ought to pick up the rope and throw the gun away. might have better luck. he started laughing. >> what made you decide to take action in the first place. heroes like cowboys are getting harder to find. especially modest ones like robert who want nothing in return. when it was over police say all he asked for was his rope back. coiled it up. tipped his hat. and then rode off into the yellow logo sunset. blazing saddles. ell that is the "overnight news" for this friday. for some, the news continues. for others check back later for the morning news. >> it's friday, march 10th, 2017. this is the cbs morning news. today president trump faces the opposition, making his pitch for the republican replacement to obamacare. winter weather heads into the northeast this morning while parts of the midwest are cleaning up after whipping winds. breaking overnight, two protesters are killed in south korea after the president's ouster. and it was a hollywood ending for the suspect in an l.a. police chase. good morning from the studio