above that the waters of lake mead. and in a few weeks' time, that plug will be lifted and those waters will flood this tunnel. and because it's quite literally at the bottom of the lake it will guarantee water supply for thirsty las vegas even as those sinking lake levels threaten to leave the two much older water intake tunnels above the water line and effectively useless. >> this facility will allow us to draw water even if lake mead gets to a dead pool elevation. that's the point at which no water can be released to downstream users. if that is to occur, southern nevada is still going to have access to its drinking water supplies in lake mead, specifically because of this facility. >> reporter: so bret, some 80 years after another engineering marvel, the hoover dam, created lake mead, american ingenuity is once again at work, effectively transforming this huge lake into the world's largest bathtub with that giant plug at the bottom, ensuring its waters can always be accessed. bret? >> jonathan hunt with a great view

but essentially, it's not getting recharged. >> lake mead is now at less than 40 percent capacity - the lowest level since its creation. but that hasn't stopped las vegas from pulling its share. the city already relies on two major pipelines from the lake. now it's begun working on a third. that's the lake right there, right? >> yup, the lake is just on the other side of this mountain here. okay. >> we wanted to know why the local water authority is building a new pipeline when the water levels in the lake already appear at a crisis point. >> one thing to keep in mind is that lake mead is doing exactly what it was intended to do. store water in wet years so it's available in dry years. we've just had a lot of dry years over the past 15. being able to install this third intake will allow us to continue accessing water even if lake mead reaches a dead-pool elevation of 900 feet. we'll continue to access that water and meet our responsibility to our two million residents and 40 million annual visitors. >> but something's gotta give. i mean you can't just keep expanding the population size

above that lake mead. and in a few weeks time that plug will be lifted and those waters will flood this tunnel. because it's at the bottom of the lake, it will guarantee the water supply for thirsty las vegas even as sinking lake levels threaten to leave the other two much older water intake tunnels above the water line and effectively useless. >> when you consider the fact that we're responsible for providing water to 2 million people and 40 million annual visitors to the economic engine of the state of nevada, this is a responsibility that we don't take lightly. >> reporter: so some 80 year, shep, after another engineering marvel, the hoover dam, created lake mead, american ingenuity is once again at work to turn the lake behind me effectively into the world's biggest bathtub and guarantee it as a source of water for decades to come. >> good stuff, jonathan hunt at lake mead. thank you. >>> three men are probably dead after apparently getting trapped under a landslide that witnesses are calling a sea of

above that the waters of lake mead. and in a few weeks' time, that plug will be lifted and those waters will flood this tunnel. and because it's quite literally at the bottom of the lake it will guarantee water supply for thirsty las vegas even as those sinking lake levels threaten to leave the two much older water intake tunnels above the water line and effectively useless. >> this facility will allow us to draw water even if lake mead gets to a dead pool elevation. that's the point at which no water can be released to downstream users. if that is to occur, southern nevada is still going to have access to its drinking water supplies in lake mead, specifically because of this facility. >> reporter: so bret, some 80 years after another engineering marvel, the hoover dam, created lake mead, american ingenuity is once again at work, effectively transforming this huge lake into the world's largest bathtub with that giant plug at the bottom, ensuring its waters can always be accessed. bret? >> jonathan hunt with a great view

above that waters of lake mead. and in a few of weeks time that plug will be lifted and the waters will flood the tunnel. >> it will guarantee the water supply for this i las vegas. even as it leaves the other two turns above water line useless. >> it's the economic engine to the state of nevada. this is a responsibility we don't take lightly. >> reporter: 80 years after engineering turned the lake mead into the largest reservoir in the country with the building of the hoover dam, americaning night is turning it into the largest bathtub to insure speement of las vegas and the rest of nevada always have access to its waters. gregg: thanks, jonathon. jenna: the fda approving oxycontin for children. is it appropriate for young patients? one of our doctors says yes and the other says you have to be careful. she was busted -- cheaters busted after hackers hack into a website where spoused look to cheelt on their spouses. do you agree with the immigration policies of donald trump? our live chat is running. >>> danika patr

above that the waters of lake mead. in a few week's time that plug will be lifted and the water will flood the tunnel. because it's at the bottom of the lake it will guarantee water for las vegas. >> when you consider the fact we are responsible for providing water to two million people to the economic engine of the state of nevada. this is a responsibility we don't take lightly. >> reporter: to see why this is such a critical prong you only have to look at the shoreline of lake mead. you can see where the water line was a few years ago and where it is now. but it seems on this occasion, american ingenuity has the answer. bill: fox news obtained two emails that helped spark the f.b.i. investigation. where they came from, what they were about, next at the top of theep hour. bp 64/40 sterilize sites. multiple foreign objects in the body. tweezers. (buzz!) (buzz!) if you're the guy from the operation game, you get operated on. it's what you do. (buzz!) if you want to save fifteen percent or more on car insurance, you switc

there's no snow on the western sierras, so we don't get any continued flow dumping into lake mead. so unless something drastic changes, there's no relief in the near future, but got to stay positive. ♪ >> for the first 34 years, you just couldn't conceive of what was ahead. what we had, whatever was the newest thing that was happening, was so spectacular and wonderful and oh, my gosh, we've reached a new eastern edge, or western, northern edge. the odds are slim to zero that we're going to extend it to yet a further horizon. it's inconceivable. so there's the thing. the desert exceeds our ambition. >> in vegas, nothing is permanent. it constantly eats itself. tears down, builds up, expands according to no known or easily understood plan. an organic thing, responding to the dark dreams of the american subconscience. come frolic, live like caesar, or make money off those who do. drop a few moist bills in a gas station slot, see the full spectrum of human folly and commit some follies of your own. -- captions by vitac -- www.vitac.com ♪ >>> since i was 14 years old, i always wore

lake powell is connected to lake mead. and together, they form the largest reservoir in the world. and if that fell apart, and if the muscles began to clog up the dam behind me, suddenly we're talking about las vegas losing it's water supply. it's an incredibly fragile system here. >> jake, what preventative measures are taken in light of what happened here? >> reporter: you know, it's extraordinary, you talk to the people on the ground, and there are not enough of them to truly take preventive measures. there's certainly no technology in place to help them clean up the spill here, and they don't even have enough people to clean and properly inspect the boats that come out of this huge and vital body of water every day. this is a place that's truly stretched thin so, even a spill that by the reasoning of a lot of scientists here is not going to have an immediate impact on the health of this ecosystem, but in the long-term it could. they don't have any way to deal with the litany of problems that they face. this is a fragile water supply system, as it is in most of the united states

and watch lake meade shrink. with vegas on the left-hand side and vegas expanding in population and you go from 2000 to 2015 and you see lake meade become considerably smaller. the drought situation in california, nevada and germany as well. >> enough drought to go around, i guess. >> looks that way. >>> he gained fame by losing weight, eating subway sandwiches becoming a poster boy for the fast food chain. >> he is admitting to paying for sex with underage girls. the plea deal and his punishment. we're back with that. everywher, the challenges of keeping everyone working together can quickly become the only thing you think about. that's where at&t can help. at&t has the tools and the network you need, to make working as one easier than ever. virtually anywhere. leaving you free to focus on what matters most. at ally bank no branches equalsit's a fact.. kind of like mute buttons equal danger. ...that sound good? not being on this phone call sounds good. it's not muted. was that you jason? it was geoffrey! it was

it is enough to fill lake mead, the largest reservoir in the country, twice. >>> an unusual hazard popped up today on a north carolina golf course. take a look at this. it is a panel door from a u.s. airways jet. it landed on the seventh green. chip shot. a few minutes before the plane touched down. in nearby charlotte. the airline says the 15 by 16- inch door covers a hydraulics service area. passenger safety was never at risk. >>> hikers wanting to walk to the popular labyrinth at land's end are out of luck. mark kelly says the maize is suddenly missing. >> reporter: in this place of peace, something evil apparently found its way in. >> they have nothing else to do but take away something people cool down to see. it is upsetting. >> reporter: in the 11 years it has been here, the labyrinth has been vandalized before, but this time is one of the worst. >> disappointed? >> yeah. >> reporter: the perfectly placed rocks that gave the labyrinth itself shape are gone. apparently thrown into the sea. left behind, nothing. but dust and dirt. so when people like brian dixon all the way from new

satellite imagery over lake meade. this is july, 2000 compared to july 2015. this is interesting to see these water levels. decrease in the temperatures. 20 degrees cooler in okc. look at the temperatures in oklahoma city. back in the 40s in portions of iowa and nebraska as well. autumn like for some people, but summer-like people in the tropics. tropical storm danny. 50-mile-an-hour winds. christine, all models are taking this to a category one hurricane over the leeward island and puerto rico in the next week. >>> thank you. we know you will follow that. donald trump. one-on-one with cnn on why he believes birthright citizenship needs to end in the u.s. next. >>> donald trump standing firm on his proposal to end birthright citizenship. trump tells chris cuomo that the 14th amendment granting citiz citizenship to any child born in the u.s. is open to interpr interpretation. >> we picked up 300,000 people that will get social security. you have people on the border and one day, walk over and have a baby and all of a sudden, we are supposed to pay the medical a

does it all end up impounded by, i don't know by hoover dam or lake meade? >> it will certainly end up downstream, end up in the sediment of the river, throughout the river flow. they can remove the sediment. they can treat the sediment and treat the water. often times this kind of material is left in place in the sediment and they monitor over time to make sure it doesn't become suspended in the water. jon: obviously there are huge problems for the people who make their living along that river, or from that river. they can't drink it. the farmers can not offer it to the livestock. how do you calculate damages in an incident like this and who pays? >> those are the folks that are suffering the most obviously. there is all sorts of different ways to calculate the damages. in this case looks as though the federal government, the epa will be required to pay. epa set up a claims process they expect people to submit claims to. and i'm sure that process right now, i'm sure people are already submitting claims to it. jon: is it something like the gulf oil spill and

mead twice the largest reservoir in the country. >> if we see the effects of el nino, how long will it take to correct this? >> here's the thing. when the ground sinks, you have this space there that has water in it. you pull the water out, the space disappears. so there's the surface water that we could recharge maybe in one or two winters. the problem is, is that long term, the space where you would love to have the water fill back into the aquifer underground isn't there anymore. so some would say that what we're pulling out now is never going ability to recharged because there's no space to put the water in the future. this is a long-term drought problem that won't be corrected with one or two years. >> thank you. >>> still ahead, san francisco police calling on a very specific group to join their ranks. why they say they are recruiting asian women to suit up. >> a major movie theater chain stepping up security. what you have to do before going inside. >> and not what parents need as kids head back to school. common treatments proving to,, [female announcer] if the most challeng

colorado, colorado basin, lake mead, the reservoir that was created when the hoover dam was built, all of these are down. there's a new nasa study saying they have taken down enough water -- ground water out of the colorado basin to provide all the water that's needed for all american households for eight years. i mean, that's just -- we just put bore wells down, and we drink this stuff up. there's 200,000 bore wells in the ogallala aquifer that goes down the spine of the u.s. down to the texas panhandle. again, building massive industrial farms to grow corn for corn ethanol and pumping up that ground water with pumps that weren't designed until the late 1950s, so before that they had no ability to pull up that ground water. it's only in, you know, 70 years or whatever that we've been able to green the desert in that way, but there's a terrible price. and the terrible price is that the department culture here in the united states said two years ago that the owing lal la aquifer will be gone in our lifetime. you try to say that to people who farm there or who live there. you know, it's

that is enough to fill lake meade, the largest reservoir in the country, twice. so what happens when the water is simply gone? >> that's a question that all of us, first of all, have a difficult time really fathoming. if we still want to have agriculture we have to come up with the water from other place. >> reporter: for now, the drilling continues, even with the ground all around it caving in. for "cbs this morning," ben tracy, california central valley. >> 16 trillion gallons. >> i know. steve arthur, the guy from the drilling company, makes a good point. $10 for milk and $5 for bread, that will get your attention. >> there is so much water, the world is mostly water. >> right. must figure that out. >>> one day, a big clue, one day that was hotter than july, get it? stevie wonder popped up in three cities for a concert and a announcer: this portion of "cbs this morning" sponsored by toyota. let's go places! ♪ it had to be. ♪ the only one for me is you. ♪ and you for me. ♪ so happy together! now there's a rewards program that lets you earn points at one

that is enough to fill lake meade, the largest reservoir in the country, twice. so what happens when the water is simply gone? >> that's a question that all of us, first of all, have a difficult time really fathoming. if we still want to have agriculture we have to come up with the water from other place. >> reporter: for now, the drilling continues, even with the ground all around it caving in. for "cbs this morning," ben tracy, california central valley. >> 16 trillion gallons. >> i know. steve arthur, the guy from the drilling company, makes a good point. $10 for milk and $5 for bread, that will get your attention. >> there is so much water, the world is mostly water. >> right. must figure that out. >>> one day, a big clue, one day that was hotter than july, get it? stevie wonder popped up in three cities for a concert and a message. announcer: this portion of "cbs this morning" sponsored by toyota. let's go places! ♪ it had to be. ♪ the only one for me is you. ♪ and you for me. ♪ so happy together! now there's a rewards program that lets you earn poin

that is enough to fill lake meade, the largest reservoir in the country, twice. so what happens when the water is simply gone? >> that's a question that all of us, first of all, have a difficult time really fathoming. if we still want to have agriculture we have to come up with the water from other place. >> reporter: for now, the drilling continues, even with the ground all around it caving in. for "cbs this morning," ben tracy, california central valley. >> 16 trillion gallons. >> i know. steve arthur, the guy from the drilling company, makes a good point. $10 for milk and $5 for bread, that will get your attention. >> there is so much water, the world is mostly water. >> right. must figure that out. >>> one day, a big clue, one day that was hotter than july, get it? stevie wonder popped up in three cities for a concert and a message. announcer: this portion of "cbs this morning" sponsored by toyota. let's go places! ♪ it had to be. ♪he only one for me is you. ♪ and you for me. ♪ so happy together! now there's a rewards program that lets you earn points

that is enough to fill lake meade, the largest reservoir in the country, twice. so what happens when the water is simply gone? >> that's a question that all of us, first of all, have a difficult time really fathoming. if we still want to have agriculture we have to come up with the water from other place. >> reporter: for now, the drilling continues, even with the ground all around it caving in. for "cbs this morning," ben tracy, california central valley. >> 16 trillion gallons. >> i know. steve arthur, the guy from the drilling company, makes a good point. $10 for milk and $5 for bread, that will get your attention. >> there is so much water, the world is mostly water. >> right. must figure that out. >>> one day, a big clue, one day that was hotter than july, get it? stevie wonder popped up in three cities for a concert and a announcer: this portion of "cbs this morning" sponsored by toyota. let's go places! it had to be. the only one for me is you. and you for me. so happy together! now there's a rewards program that lets you earn points at one place and use t

. >> at its lake mead that is really bad. stuart: it is time now for the sector report. cheryl casone me, what are you watching today. >> you were talking to gordon chang about china. this is one of the big details down about 4%, almost three bugs. macy's paid quite a day to announce the joint venturing china and they will be on alibaba believe it or not. i said domestic sales down. people are by michael kors bags, a lot of the things made these authors. they have a lot of discounts. i was watching not up well. >> yeah, that is true. coming up, another crackdown on uber. drivers arrested in hong kong. jack king joining us in the next hour. he is a general. he will react to the e-mail server scandal. ...that sound go? ...that sound go? not being on this phone call sounds good. it's not muted. was that you jason? it was geoffrey! it was jason. it could've been brenda. will you be a sound sleeper, or a mouth breather. well, put on a breathe right strip and instantly open your nose up to 38% more than allergy medicines alone. so you can breathe and sleep. shut your mouth and

. >> he lakes the cop tact. >> top of excitement and buzz about michigan football since harbaugh araved on the eve of opening first track camp with the wolves reasons he was the buzz killer for the mead y.former niner head coach today said he won't be talking to reporters for awhile any way. no update on the battle over the starting quarterback spot or anything else for that matter. focus is on football. football. and nothing but football. the. >> we are going into subject marine tomorrow and you want see us for awhile. >> we need to come up to the surface. i don't know what day had you planned for media for me or the players but about won't be whole lot of won't be seeing much of each other. >> he smiles he look at the reporter. i'll not see you guys. warriors newly acquired forward thompson warm welcome at headquarters today. average 9 points a game in 7 seasons off the bench with the king. from worst to first and thrilled to suddenly be joining the fba champion. >> you know this is a championship team and talk to the guys i know it wasn't easy to happen an even harder to repeat as we