Birds are disappearing by the billions. Whats emptying the skies. And taking the field. Taking on the taliban by playing hard on and off the field. We are the new generation of afghanistan. Welcome to the cbs overnight news. For the first time President Trump suggested that he did discuss former Vice President joe biden and his son during a phone call with ukraines president. The issue sparked a new political fire storm for the president following him all weekend including stops in two states before arriving in new york. Nicole kiln yan has tlatest fro the white house. Reporter as he departed the white house, President Trump continued to face questions over a phone call with the irukraini president. It was largely all the corruption taking place. It was lrgely the fact that we dont want our people like Vice President biden and his son creating the corruption already in the ukraine. Reporter the july 25th call ignited a plilt call fire storm following a whistleblower complaint. During the call the president reported him to investigate bidens son who worked for ukrainian gas company. There was no quid pro quo, nothing. Reporter he denied and hes okay with his attorney testifying before congress. What they are trying to say is i went there for a plut call mission to get joe biden in trouble. Ridiculous. Focus on the violation of the constitution. Reporter biden has denied skusing his son cease job overseas. He was protecting his son and intervened in a way that was corrupt, we need to get to the bottom of that. Reporter some in the administration suggested biden should be investigated, democrats argued if the claims against the president are proven, impeachment is the only option. If the president is withholding military aid at same time trying to brow be a foreign leader to provide dirt during his opponent, that may be the only remedy that is coequal to the evil that conduct represents. Ukraine says no pressure was put on its president. He is expected to meet with trump later this week during the u. N. General assembly. Nicole Week Congress will hear from the acting director of National Intelligence about the whistleblower complain this. What can we expect from all of that . Nancy pelosi expects the acting direct director not only to during over the complaint but to allow this whistleblower to speak. So far, she has resisted calls for impeachment, but did warn of a whole new stage of investigation if the administration does not comply. Nicole, thank you. Now to escalating tensions in the middle east. Today irons president called on western nations to, quote, stay away from the persian gulf. At the same time, the sparring goes on including threats of an allout war over who is responsible for last weeks attack on Oil Facilities in saudi arabia. Ian lee is in riyadh. Reporter what started out as an attack on two saudi Oil Facilities leaving twisted metal and burnt out fuel tanks has turned into a war of words. Irans president said today the u. S. Is creating an arms race in the region. While irans foreign minister told face the nation it could lead to conflict. Im not confident we can avoid a war. Im confident we will not start one. Reporter secretary of state mike pompeo shotback. Irans foreign minister repeatedly denied any part played by iran in this attack. Will the u. S. Release evidence that proves hes lying . Well, we already have. Theres ample evidence that demonstrates hes lied. The saudis showing systems built and manufactured inside of iran. Reporter this week saudi arabia showed us what they said is the evidence tehran was behind the attack despite the rebels claiming responsibility. The blast marks on the refineries point north. You can see five of these towers and when you look at the damage done, you can see that its pointing in the northwesterly direction. Thats likely where the projectiles came from. Officials claim the pieces of drones recovered were made in iran. But a team of u. N. Investigators is in the country independently inspecting saudi arabias claims. Tonight the tensions are still high. United states says the additional troops are taking a defensive posture, but iran continue to warn that any strike against the country will see swift and broad retaliation. Ian lee, thank you. Now on the road to 2020. A new poll of likely democratic voters in the iowa caucus shows a change at the top, at least for now. The Des Moines Register poll shows Elizabeth Warren leading joe biden by 2 points. Bernie sanders is a distant third. Ed okeefe is on the campaign trail in waterloo, iowa. How is the new poll playing among the campaigns . Reporter well, this is the first significant lead change. The fact that biden has slipped to second is notable. He has universal name recognition, but you talk to people in the state and they credit warren and her team for building out an operation that is increasing her support. We shouldnt put too much into polls this early in the cycle, but the polling done by the Des Moines Register through the years is often the one that ends up predicting the winner, which is why this poll gets extra attention. Thats a good point. The polls a shows that just 1 in 5 iowa voters say they made up their mind about who to support. Is that what youre hearing . Reporter it is. Take the example of a woman we met earlier today who said she would love to see Elizabeth Warren and Pete Buttigieg end up on the ticket together, but shes a fan of amy klobuchar. And shes okay with biden too. Indecisive voters have 134 days to decide. Ed okeefe, thank you. Here in new york, a landmark summit on Climate Change takes place tomorrow. Yesterday teen activist of sweden who has mobilized millions of young people around the world both joe biden and Elizabeth Warren joined striking gm workers on the picket lines today. The former Vice President was in kansas city, kansas. Warren was with workers in detroit preponderance the nationwide walkout isnt just about the terms of a new contract, but about big changes down the line. Reporter as negotiations proceed at this detroit hotel, difficult questions are demanding answers as. Michelle krebs is an executive analyst with cox automotive. How many jobs will exist because of electricss of real ce for the out future. Reporter electric vehicles still an unusual site on the nations roads are gathering momentum. Gm plans to introduce 20 new all electric models by 2023. A major uncertain step away from gasoline or diesel power. Electric batteries and motors are much simpler to make than the internal come bungs engines. That means fewer works on the factory floor and fewer workers needed to keep the vehicles running once sold, which in turn means lesds profits for dealerships and mechanics and along the picket line one member thinks theres a bright side. Youre always going to need people to build vehicles. Reporter the coming transformation is undenial. We know electric vehicles, new ways of us acquiring personal transportation is going to happen. We dont know when that will be, and we dont know when anyone is going to make money on it. Reporter Big Questions in need of answers and not just for auto workers. Dean reynolds, cbs news, new york. A landmark takes place tomorrow. Gretta, who organized millions of young people, received a raw cuss welcome. Many World Leaders will also attend the summit, butt United States is only sending a low level state department official. In the atlantic tonight, two tropical storms are churning and could cause trouble. Forecasters predict karen on track to cross puerto rico and the Virgin Islands will dump up to 4 inches of rain there tuesday night. The islands of trinidad are already feeling the wrath of karen with heavy rain and 40 mile per hour wis. Tral jer c hit already battered bermuda with more rain and high winds on tuesday. Were kicking off a new series. Medical price roulette. Its an indepth look at why hospital and Health Care Bills can vary so dramatically taking patients by surprise. One doctor sade he needed emergency back surgery or could face paralysis. Then over 650,000 in bills arrived. It was my choice. Be paralyzed for the rest of my life. It was bad enough being out of work and not being able to make a paycheck. But then to get bills so overwhelming, you say this cant be real. I dont have to pay this. How am i going to pay this. You sit there and kblyou start christing because you dont know what to do. You have no sense of reality anymore. You dont foe what youre going to do. Our new series begins on cbs this morning and on the evencb evening news. For five years shes remained anonymous and silent. But now Chanel Miller is speaking out about being swaully assaulted by brock turner. In an interview with 60 minutes, she talks about the outrage at the sentence and to overcome feelings of guilt and shame. Reporter as chanel spoke directly to her assailant in court, she says she noticed people crying. Brock turn herb wouldnt look at her. Your damage was con crete. Stripped of titles, degrees, enroll the. My damage was internal. Unseen. I carry it with me. You took away my worth, my privacy, my energy, my time, my safety, my intimacy, my confidence, my own voice until today. Reporter after she spoke her last words, the judge handed down his sentence. Citing the defendants good character, the fact he had been drinking and the impact prison would have on his life, the judge sentenced turner to six months in jail with Good Behavior hed walk free in 90 days. The prosecutor had been asking for six years. Yes. How did that hit you . I in shock. Youre saying i just put aside a year and a half of my life so he could go to county jail for three months. There are young men, particularly young men of color, serving longer sentences for nonviolent crimes for having a tiny bit of marijuana in their pockets. Hes just been convicted of three felonies and hes going to serve one month for each low ou . Next, why spar rows, blackbirds and finches all familiar birds might be facing extinction. Something great from mr. Clean. Stop struggling to clean tough messes with sprays. Try clean freak it has three times the cleaning power of the leading spray to dissolve kitchen grease on contact. And its great for bathrooms just keep pumping the power nozzle to release a continuous burst of mist and make quick work of big jobs. It even works on stainless steel. It cuts through 100 of dirt, grease and grime. Available with easytoswap refills. To get three times the cleaning power, try clean freak from mr. Clean. Could you email me the part great about geicon, tim. Making it easy to switch and save hundreds . Oh yeah, sure. Um. You dont know my name, do you . li juet you mixedup with tu of course i know your name. Whats his name . Whats your name . Switch to geico®. You could i want this to be over. Wild birds are disappear in at an alarming quarter rait. A quarter of population has vanished in the last half century. Jonathan vigliotti has more on tonights eye on earth. How accurate are these numbers . Extremely accurate. Reporter the bird population dropped by 3 billion in just 50 years. The alarming die off outlined in a new paper. Peter mara, author and director of the environmental nirktive, called it an environmental crisis. This needs to be a wakeup call. Its time people did wake up and started taking care of their environment like we need to do. Its an environment we also depend on. Reporter the study brought together information gathered since 1970. Much of it collected by thousands thousands of bird enthusiasts from across the u. S. And canada. Hardest hit grassland birds lker spar rows losing more than half their population. And shore birds seen in coastal regions, where population has fallen by more than a third. Researchers arent sure whats making birds so vulnerable, but point toans forotential reasons of the destruction of natural habitat and use of toxic pesticides. When we lose them, its like burning. Its tearing down our museum. Were losing our heritage. Future generations will not be able to share watching these big flocks of birds that we once watched. It tells us were a little sick. We need to get back on the mend. Reporter the director of the aud bonn center for wildlife minutes from downtown los angeles. Birds are important because they tell us a story about our environment. Just based off the birds that you see present in the community. The ka na ri in the coal mine. Itsigonservation efforts on a legislative level has to happen now. I think of these birds as the rem brants, the mones, they are the priceless pieces of art that exist in nature. Reporter pieces of art that he hopes can be enjoyed for generations to come. Cbs news, los angeles. Those birds are the ka nay ri in the coal mine. Hard work leaves a mark. Itwsyour clothes. Theyre branded by sweat, pride, and every stain the job throws at you. For the hardest workers, weve designed the hardest working tide. So you can leave your mark on the world, without the world leaving its mark on your clothes. New tide heavy duty. Designed for impossible stains. New pepto diarrhea to the rescue. Diarrhea . Its three times concentrated liquid formula coats and kills cteria to relieve diarrhea. The leading competitor only treats symptoms. It does nothing to kill the bacteria. Treat diarrhea at its source with new pepto diarrhea. For a a new president. Whoever wins will be in dharge of attempting to negotiate first a ceasefire and then some form of shared government. That could undermine gains made by afghan women not just at the ballot box but on the playing field. Charlie dagata has the story. Reporter for these young women in kabul, soccer has never been just a game. Actually, when i play football, i feel free. When you play soccer, it makes you feel free. Yeah. Reportedom is now under threat. Women here fear their liberties will be sidelined in any taliban negotiations inviting a return to a dark past. Under taliban rule, women werent allowed to leave the house without a male companion. The idea of young women playing soccer here in kabul would have been unthinkable. She was an saspiring medical student when the taliban overran kabul. They have banned education for all girls. The city was like a graveyard. Reporter she says she had had lost hope until 9 11 changed everything. Im sorry to say this, but what happened in 11 september was beginning of somehow a liberty to the woman in afghanistan. Because at least you could walk after the taliban collapsed without the fear of being beaten up by taliban. Reporter shes still leading the charge for afghan women the right to study, to govern and play soccer. We want to show the people that we are the new generation of afghanistan. Worth fighting for. Charlie dagata, kabul. We end with news out of washington that every american can sell britt. Tourists lined up this weekend to get to the top of one of the most cherished landmarks. Its been closed for repairs for three years. Reporter the washington monument, a symbol of american unity, beckens visitors from across the world. But for nearly a decade, its been closed more than open. Why did it take so long were. Were dealing with oneself of the most iconic and Historic Properties in our country. It takes time to do everything right. Reporter the 2011 virginia earthquake shook the monument to its core cracking stones and showering debris on scattering tourists. The big fear was the monument itself would fall or lit literally large pieces of rock would be coming off the monument. Reporter inspectors later repelled down the monument before scaffolding during repairs. The crack goes all the way through. Reporter just as those repairs were completed, the elevator broke sometimes stranding visitors. Another round of upgrids delivered a new security skraening center and a whisper quiet elevator that takes you to the top in about a minute. The whole project took about three years. Reporter from the observation deck, the National Mall reveals the beauty one window at a time. Kind of breathtaking. Its spectacular. Reporter a spectacular view for all to share once again, cbs news, atop the washington monument. Thats the cbs overnight news for this monday. For some of you, the news continues. For others check back later for the morning news and cbs this morning. From the broadcast center, im adrian na diaz. This is the cbs overnight news. Welcome to the cbs overnight news. Im adriana diaz. For the first time, President Trump suggested he did discuss joe biden and his son during a phone call with ukraines president s. The issue has sparked a new political fire storm for the president following him all weekend including stops in two states before arriving in new york. Nicole kiln yan has the latest fromhe house, psiderump d actionover a phone call with the ukrainian president. It was largely all the corruption taking place. It was largely the fact that we dont want our people like Vice President biden and his son creating the corruption already in the ukraine. Reporter the july 25th call has ignited a political fire storm following a whistleblower complaint. During the call the president reported him to investigate bidens son who worked for ukrainian gas company. There was no quid pro quo, there was nothing. Reporter he denied and hes okay with his attorney rudy joule, giuliani, testifying before congress. What they are trying to say is i went there for a Political Mission to get joe biden in trouble. Ridiculous. Focus on the violation of the constitution. Reporter biden has denied discussing his son cease job overseas. He was protecting his son and intervened in a way that was corrupt, we need to get to the bottom of that. Reporter some in the administration suggested biden should be investigated, democrats argued if the claims against the president are proven, impeachment is the only option. If the president is withholding military aid at same time trying to brow be a foreign leader to provide dirt during his opponent during a campaign, that may be the only remedy that is coequal to the evil that conduct represents. Ukraine says no pressure was put on its president. He is expected to meet with trump later this week during the u. N. General assembly. Nicole, this Week Congress will also hear from the acting director of National Intelligence about the whistleblower complaint thats at the center of all of this. What can we expect from all of that . Nancy pelosi expects the acting director not only to during over the complaint but to speak. Is whistlebler t so far, she has resisted calls for impeachment, but did warn of a whole new stage of investigation if the administration does not comply. Nicole, thank you. Now to escalating tensions in the middle east. Today irans president called on western nations to, quote, stay away from the persian gulf. At the same time, the sparring goes on including threats of an allout war over who is responsible for last weeks attack on Oil Facilities in saudi arabia. Ian lee is in riyadh. Reporter what started out as an attack on two saudi Oil Facilities leaving twisted metal and burnt out fuel tanks has turned into a war of words. Irans president said today the u. S. Is creating an arms race in the region. While irans foreign minister told face the nation it could lead to conflict. Im not confident we can avoid a war. Im confident we will not start one. Reporter retary of state mike pompeo shotback. Irans foreign minister reated dend any part played by iran in this attack. Will the u. S. Release evidence that proves hes lying . Well, we already have. Theres ample evidence that demonstrates hes lied. The saudis showing systems built and manufactured inside of iran. Reporter this week saudi arabia showed us what they said is the evidence tehran was behind the attack despite the rebels claiming responsibility. The blast marks on the refineries point north. You can see five of these towers and when you look at the damage done, you can see that its pointing in the northwesterly direction. Thats likely where the projectiles came from. Officials claim the pieces of drones recovered were made in iran. But a team of u. N. Investigators is in the country independently inspecting saudi arabias claims. Tonight the tensions are still high. United states says the additional troops are taking a defensive posture, but iran continue to warn that any strike against the country will see swift and broad retaliation. Ian lee, thank you. Now on the road to 2020. A new poll of likely democratic voters in the iowa caucus shows a change at the top, at least for now. The Des Moines Register poll shows Elizabeth Warren leading joe biden by 2 points. Bernie sanders is a distant third. Ed okeefe is onthe campaign trail in waterloo, iowa. How is the new poll playing among the campaigns . Reporter well, this is the first significant lead change. The fact that biden has slipped to second is notable. He has universal name recognition, but you talk to people in the state and they credit warren and her team for building out an operation that is increasing her support. We shouldnt put too much into polls this early in the cycle, but the polling done by the Des Moines Register through the years is often the one that ends up predicting the winner, which is why this poll gets extra attention. Thats a good point. The polls a shows that just 1 in 5 iowa voters say they made up their mind about who to support. Is that what youre hearing . Reporter it is. Take the example of a woman we met earlier today who said she would love to see Elizabeth Warren and Pete Buttigieg end up on the ticket together, but shes a fan of amy klobuchar. And shes okay with biden too. Indecisive voters have 134 days to decide. Ed okeefe, thank you. Here in new york, a landmark on cle place tomorrow. Yesterday teen activist of sweden who has mobilized d ceiv welcome. Many World Leaders will attend the summit, but the United States is only sending a low level official. Were kicking off a new series. Medical price roulette with clear health costs. Its a look at why hospital and Health Care Bills can vary so dramatically taking unwitting patients by surprise. Frank says his doctor told him he needed emergency back surgery or could face paralysis. Then over 650,000 in bills arived. It was my choice. Be paralyzed for the rest of my life. It was bad enough being out of work and not being able to make a paycheck. But then to get bills so overwhelming, you say this cant be real. I dont have to pay this. How am i going to pay this. You sit there and you start dry crying because you dont know what t anyme. Of rea you dont foe what youre going you dont foe what youre going to do. Ok ill admit. I didnt keep my place as clean as i would like cuz im way too busy. Whos got the time to chase around down dirt, dust and hair . So now, i use heavy duty swiffer sweeper and dusters. For hardtoreach places, duster makes it easy to clean. It captures dust in one swipe. Ha gotcha and sweeper heavy duty cloths lock away twice as much dirt and dust. 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Most of them involve vaping with thc. Thats the psychoactive ingredient in marijuana or both thc and nicotine. A Bipartisan Group in congress is working with parents to keep teens away from all ecigarettes while accusing the vaping industry of marketing to kids. Its frankly unfortunate that it takes so many people to get sick and. Net across this country before we pay the kind of attention we should. Reporter lawmakers are joining parent who is say they can no longer kit zit back and watch as children fall to the dangers of ecigarettes. We will not allow our children to be used as human getny pigs. They are calling for a legislative fix. Like the trump administration, they say flavors marketed to teens is part of the problem. Flavors like bubble gaum, gummy bear have no place in the marketplace when they are marketed to kids. Reporter 2018 data shows that more than 20 of High School Students used ecigarettes, up 78 from 2017. And nearly 70 of those students use flavored ecigarettes. A ju, l represent came to my school and told me and my friends, it was totally safe. Reporter the fda issued a warning to ju, l for their marketing practices including claims made in presentations at school. The carcinogens could have devastatie ining impacts on tee whose lungs are still developing. They told us and had we brought her in later she would have been unresponsive on a ventilator. We dont know if there will be permanent lung damage. Reporter a teen advocate. Some of my friends are trying to quit because of the new data that has come out, but its too hard to do without help. Reporter even before this outbreak, ecigarettes divided the medical community. The American LungAssociation Says bluntly ecigarettes are not safe. But the American Cancer Society says they are significantly less harmful for adults than smoking regular cigarettes. Another complication showed 5 million children use ecigarettes. We wanted to see the seens for ourselves. One of the webs most talked about provaping videos is an experiment comparing the effects of tobacco cigarettes and ecigarettes on the lungs. This is cigarette smoke. Put out by englands Top Public Health agency. My Research Shows that ecigarettes are significantly less harmful than cigarettes. Reporter it describes ecigarettes as at least 95 less harmful than tobacco cigarettes but is that really true . I would agree with that and i would go further. I think theres now evidence from looking at the kacancer biomarkers it could be as high as 98 or 99 for cancer. Reporter david a brams is a professor at new york university. We asked his colleague s s to recreate the expt healtengland. This is going to look very yucky and thats whats going to simulate what goes in the lungs of people. Lets see what happens. Reporter for two hours shs the team simulated smoking four packs of cigarettes. Comparing it to the same amount of vaping. In the end, the differences were plain to see. This is tar. Yes. The damage caused by cigarette smoke was obvious. This is only four packs of cigarettes. This much material is entering their mouth and entering the lungs. Just nasty. Reporter the vapor from a coffeeflavored eliquid not so much. Theres a little dampness. It smells like coffee. Public Health England is saying less harmful. You think thats true or not . I think thats fairly accurate statement. They are much safer than cigarettes. Reporter but other american scientists are drawing very different conclusions. I would say its 95 harmful because in any single study that i have seen thats look at this in a meaningful way outside the lung, they are finding damage and harm. Reporter inside this lab at West Virginia university, he investigates the potential longterm effects of vaping not on the lungs, but on the heart. His team is exposing ro didnts to ecigarette vapor. In a recent study, he looked at eight months of exposure, the equivalent of 25 human years. And what he found concerns him. The machine is detecting a higher velocity of flow through the vessels. Reporter the arteries stiffened, almost as much as those exposed to cigarette smoke over the same time. Stiffer arteries means greater risk for stroke, heart attack, aneurysms, any number of vascular effects. Its alarming. Its extremely alarming because it tell mess ecigarettes are not going to be safer than cigarettes. Reporter hes trying to figure out why it happens. Its not the nicotine. Its something in the base solution. The base solution is made up of oils. But advocates say its just a little oil and water vapor. Thats it. Thats actually the biggest lie about ecigarettes is that its water vapor. Thats an oil and petroleum solution. When you think about the continuum of risk, you have pure air over here, healthiest thing on the planet and you have cigarettes over here, one of the most deadly things ever invented. Wheres an ecigarette on that skail . Its just as close to cigarettes as you can possibly get. The cdc is now advising people worried about health risks to avoid vaping, but at the same time, anyone using ecigarettes to quit smoking should not go back to cigarettes. May 2020 is the official deadline for ecigarette manufacturers to demonstrate that they are a net good for public health. The cbs overnight news will be right back. I saved hundreds when i switched my Car Insurance to geico. This is how it made me feel. It was like that feeling when you pull your green sock out of the dryer and then the very next sock is the other green one. And then you pull out two blue ones. And you keep going till youve matched every single sock in perfect order. And the owner of the laundromat is so impressed, he hangs a picture of you next to the dryer. And thegeico. Of the laundromat is so impressed, fifteen minutes could save you fifteen percent or more on Car Insurance. 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Reporter the most popular element of the campaign trail isnt necessarily a policy woters to a stump speech, l connect with candidates putting a new spin on retail politics. Some of the the fphotos dont always technically fit the definition of a selfie, but heres the snapshot of the modern campaign. Reporter they came hello, new york. Reporter they saw. Thank you, thank you. Reporter they selfied. In the race for the white house, socalled selfie lines have become a key feature of Campaign Events with voters willing to wait hours to take a photo with the candidate. We waited this if loin and it was worth it part sglm cap pains have professionalized the pi picture taking experience and made it central to their digital strategy. The real measure of democracy more than 50,000 selfies. Photo lines are such a priority for Elizabeth Warrens campaign that she even changes into sneakers to prepare. I was really going to build a grass roots movement. Small dollar donations, volunteers and selfie lines. Reporter warrens selfie line is a fine tuned operation. Theres a person in every task. Somebody to take the phone from you, hand it off to the person that takes the picture of you while youre with liz. Reporter a picture is worth a thousand words. But for these campaigns, they are actually worth a thousand impressions. Fphoto lines act as a Mass Marketing tool. A photo taken is a photo shared serves as free Digital Advertising for candidates. We live in a world of social media. Anybody who gets a selfie of you will post it online. Their friends will see that as well and helps to generate vorlty. Its major savings for the campaigns. All while generating grass roots momentum. Are you going to share this photo . Everywhere. The selfie lines have become such a key feature of the Campaign Events the candidates build in extra time to make sure they can take a picture with everybody who comes to see them. Thauk. Its one of the most important and meaningful interactions that i have at any of these events. My team members are usually with me. We have to follow up with this person. Reporter some candidates have developed their own selfie protocol. First thing you have to know how to hack into any phone. They put the code in and take a lock time. By taking it myself, i can swipe with one finger and be in their camera. Joe biden is known tohis own emional connections. People want to be rele ask y questions. They are frightened about their circumstance or suffering a serious loss. Any instance in that line that you felt that you really sympathetic with someone . More than one. What do you say to a woman who says i lost my child, and if we had Decent Health care, that would not have been the case. It moves you to the core. Reporter the selfie lines influence policy proposals. Is there a plan that was specifically directly influenced by your conversations on the selfie line . Yes, in fact, i distinctly remember meeting the woman in the selfie line who said, why dont you commit that your secretary of education will be someone who will talk in public schools. And i thought about that. And i thought, youre on. Reporter sometimes they even bring competitors together as friends. Elizabeth warren held a fourhour long selfie line earlier this week. They are now up to 60,000 selfies showing no signs of slowing down any time soon. In fact, our own ed okeefe spotted the senator at the airport this week on their way to iowa. And look what we have here. A selfie line impromptu forming at airport. This is something that were going to continue to see for a long time. When you humble yourself under the mighty hand of god, in due time he will exalt you. Hi, im joel osteen. Im excited about being with you every week. I hope youll tune in. Youll be inspired, youll be encouraged. Im looking forward to seeing you right here. You are fully loaded and completely equipped for the race thats been designed for you. A new study in the journal science takes a look at the mysterious disappearance of billions of birds in the skpus cana canada. More than a quarter of the population disappeared over the last half century. Jonathan vigliotti asked some of these scientists why this is happening. How accurate are these numbers . Extremely accurate. Reporter the bird population dropped by 3 billion in just 50 years. The alarming die off outlined in a new paper. Peter mara, author and director of the environmental initiative, called it an environmental crisis. This needs to be a wakeup all. Its time people did wake up and started taking care of their environment like we need to do. Its an environment we also depend on. Reporter the study brought together information gathered since 1970. Much of it collected by thousands thousands of bird enthusiasts from across the u. S. And canada. Hardest hit grassland birds like spar rows losing more than half their population. And shore birds seen in coastal regions, where population has fallen by more than a third. Researchers arent sure whats making birds so vulnerable, but point to humans for potential reasons of the destruction of natural habitat and use of toxic pesticides. When we lose them, its like burning. Its tearing down our museum. Were losing our heritage. Future generations will not be able to share watching these big flocks of birds that we once watched. It tells us were a little sick. We need to get back on the mend. Reporter the director of the aud bonn center for wildlife minutes from downtown los angeles. Birds are important because they tell us a story about our environment. Just based off the birds that you see present in the community. The canary in the coal mine. Its a sign sth conseation efforts on a legislative level has to happen now. I t think of these birds as e randts, the monets, they are the priceless pieces of art that exist in nature. Reporter pieces of art that he hopes can be enjoyed for generations to come. Cbs news, los angeles. Thats the cbs overnight news for this monday. For some of you the news continue, for others, check back for cbs this morning. On t broadcast cenr in new york city, im adriana diaz. Captioning funded by cbs its monday, september 23rd, 2019. This is the cbs morning news. President trump admits he spoke to the ukrainian president but insists he didnt pressure him to investigate joe bidens son. That was not pressure. I know when i give pressure, and that was not pressure. Well break down this whistleblower controversy that has some House Democrats renewing calls for impeachment. A shakeup on the campaign trail. Elizabeth warren surges in a new poll to take the lead in iowa for the first time. What iowa experts think is behind her rise to the top. 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