you might recall that the nfl agreed four years ago to a $1 billion settlement in a brain injury lawsuit brought by a group of former players and their families. aaron hernandez was not part of that lawsuit. but researchers today said hernandez had the most severe case of cte ever found in someone his age. >> just a tragic story. thank you, j.b. the "cbs overnight news" will be right back.

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>> announcer: this is the "cbs overnight news." >> the earthquake death toll in mexico rose today to at least 273. more than two days after the magnitude 7.1 earthquake reduced buildings to rubble, survivors are still being rescued. manuel bojorquez is there. >> reporter: at the start of the day, rescuers believed a 12-year-old girl was still trapped in this crumbled school. the drama riveted a traumatized nation as crews used thermal cameras to figure out a way to reach her. later they brought a teacher to the scene. believing the girl might hang on if she heard a familiar voice. but by late afternoon the government announced the signs of life are likely an adult, not a student after all.

elsewhere, crews mounted rescues through small cracks in the rubble. pulling survivors to safety. [ speaking foreign language ]. >> reporter: others mourned. near the epicenter, 11 members of one family were killed when a church collapsed during a baptism. the violent quake struck on the exact anniversary of the catastrophic 1985 quake that killed nearly 10,000 people. but this time, the city's seismic warning sounded and people ran into the main square. this engineering professor says it's a new line of defense, as are stronger building codes. >> i would say the type of structure being used in mexico city now is a structure in which more walls are being used aside from columns and beams and that

makes the structure stiffer and stronger. >> reporter: but stricter building codes did not prevent this collapse. and guadalupe is searching for her son gustavo. >> you wish you could be there yourself? searching, yourself, for him. her son is among 40 people listed as missing from the collapsed office building behind me. and you can see from the wet roads that a thunderstorm rolled through this evening, hampering the rescue efforts. anthony? >> manuel bojorquez, great reporting there, manny, thanks. a day of rescues in another natural disaster, hurricane maria in puerto rico. david begnaud is there. >> reporter: in the small town of toa baja hundreds of residents were rescued by the national guard. most packed into trucks while scores of others waded through two feet of water, carrying what's left of their possessions.

in this suburb of san juan, residents forged through flooded streets heading to the only open grocery store. only five were allowed in at a time to avoid chaos. maria inflicted damage on 80% of the homes here and like the rest of the island, there is no power or phone service. we rode with the mayor as he surveyed the damage and watched these young men help police rescue a 91-year-old man in a kayak. outside that man's house, his neighbors wept. his home was surrounded by chest-deep water. how are you feeling, i asked him? i'm good thanks to the virgin mary, he said. it wasn't any different here where teams went house to house rescuing the sick and elderly. at this shelter, residents nervously checked makeshift lists looking for names of family members who are safe. janice longoria has been looking

for her 77-year-old aunt since yesterday. >> she's an elderly person. i don't know how is she? it's hard. >> reporter: and for those families who were able to reconnect -- words can't describe. the governor of puerto rico says two-thirds of this island are a disaster zone tonight. the airport in san juan reopened but only for military and emergency operations and amid this misery you should know we have seen resilience as one man told us with a smile on his face, we're used to this. anthony? >> thank you, david. it wasn't a missile this time, tonight, kim jong-un shot off his mouth calling president trump a mentally deranged dotard and warning he'll pay dearly for his threats which you'll recall include wiping north korea off the map. mr. trump slapped new economic

sanctions on the north. but his efforts to get kim to the bargaining table may be jeopardized by his threats to scrap the nuclear deal with iran. here's white house and senior foreign affairs correspondent margaret brennan. >> reporter: president trump wants to renegotiate the 2015 agreement that froze iran's nuclear program in exchange for sanctions. >> that deal is an embarrassment to the united states. and i don't think you've heard the last of it. >> reporter: he wants a longer, more stringent deal and is trying to force the issue by accusing iran of not complying with the terms of the existing deal, even though all five other signatories, including russia and china, say otherwise. so does the secretary of state. >> iran is in technical compliance of the agreement. >> reporter: iranian president, hassan rouhani warned that a his country will not renegotiate and warned a u.s. pullout would have broader implications. >> is there a diplomatic way out? >> talking would be a waste of time, he said and in the future

no other government would be willing to trample on its commitments. walking away would complicate u.s. attempts to get north korea to give up its nuclear weapons. senior national security contributor, michael morel. >> if we back away in any way from our nuclear agreement with iran, we send a signal to north korea that a future president might unravel their deal too. so it is a disincentive, a strong disincentive for north korea to come to an agreement with the united states. >> reporter: secretary of state rex tillerson says he is optimistic that the u.s. can handle both threats. >> the threat is the same but the nature of the agreements are going to be quite different in terms of what's necessary to achieve the objective, a denuclearized north korea and iran that never pursues nuclear weapons. >> i asked u.n. ambassador nikki haley if walking away from the iran nuclear deal makes it

harder to broker a deal with north korea. her response? it shows that the american president is look out for the american people. >> thanks, margaret. and coming up next, the impact of flint's tainted water on the health of women and babies.

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a new study blames contaminated water in flint, michigan for severe health problems, dean reynolds is in flint. >> reporter: when this 41-year-old looks at the ultrasound images of the twins she lost two years ago, her anger is evident. >> i believe the lead in the water caused me to have my miscarriages in 2015. >> reporter: back then she was drinking and bathing in the water pumped to the home by the city of flint. to save money the city had switched its water source to the flint water because it was cheaper than the water it had been getting from detroit. but so corrosive, it leached led from her pipes right into her faucet. and last year when she had her water tested, lead concentrations of 1100 parts per billion were found. safe levels are no higher than 15 parts per billion.

>> we were taking showers and baths and breaking out with -- i don't know what it was, they weren't scabs but bumps and stuff all over our bodies. >> reporter: her case is not isolated. according to a new medical research study, fetal death rates increased by 58% in flint after the city switched its water source in april 2014. daniel grossman is a co author of the study. >> the costs of the water change were not limited to effects on children and adults but also led to large decreases in fertility rates which could have long-lasting effects on the city itself. >> reporter: today a judge in flint was deciding whether to proceed with a trial of michigan's health and human services director nick lyon. he is accused of involuntary manslaughter by failing to warn the public about an outbreak of legionnaire's disease which was connected to the water crisis.

she is now four weeks pregnant and hoping for a healthy new baby and has been drinking nothing but bottled water for the last three years. anthony? >> dean reynolds in flint. thank you, dean. still ahead, turkish security cracks down on protesters in new york. clearasil rapid action begins working fast for clearly visible results in as little as 12 hours. but will it stop this teen from being embarassed by her parents? nope. so let's be clear: clearasil works fast on teen acne, not so much on other teen things. do i use a toothpaste thati had whitens my teeth or one... ...that's good for my teeth? now i don't have to choose! my dentist told me about new crest whitening therapy. so, i tried it! from crest 3d white comes new whitening therapy.

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violence erupted today as turkey's leader gave a speech in new york when protesters called president erdogan a terrorist, his security team dragged them out. one protester was punched in the face. there was a similar scene in may outside the turkish ambassador's house in washington. a big change at brigham young university. the mormon school salt lake city ended a 60-year-old ban on the sale of caffeinated soft drinks. no more byob at byu. up next, did "star trek" get it right? >> announcer: this portion is sponsored by --

>> five, four, three, two, one. that's "star trek: discovery" premiering on cbs. we are on the deck of the enterprise, the enterprise known as the "cbs overnight news." we asked dr. jon lapook how well the "star trek" franchise has done over the years at predicting the future of medicine. >> i was able to put a scope in and biopsy the pancreas which was unheard of 50 years ago. >> unless you were watching "star trek." as mark pochapin did when he was a boy. >> to boldly go where no man was gone before. >> "star trek" trek predicted you would scan someone in a

noninvasive way. >> reporter: the tricorder, we have ct scan, mri and ultrasound. >> what else? >> where captain kirk would talk to someone on a flat screen tv i can talk to a patient now, see their image and scans remotely. >> reporter: dr. mccoy's pie hypospray, the lenses that beam an image implanted in the retina. >> what about sick bay. >> they get on the bed and the monitors would go on like the monitors here. that has come true. we have wireless telemetry. >> we got a sneak preview from this starship sick bay. but at the end of the day, "star trek" was more than just fancy gadgets. it saw a world of inclusiveness with doctors of color, male and female and in the new series, "star trek: discovery," a physician who is openly gay. >> what were we doing in a

nebula. no wait, don't tell me. >> we consulted a specialist, he played the emergency medical hologram on the "voyager" series. >> i would appear and say -- >> please state the nature of the medical emergency. >> do you think in the future a computer algorithm could entirely replace a physician? >> ultimately, that artificial intelligence physician will be created from the personal experiences of a large group of doctors. so, yes, i believe a day will come when you will be obsolete. >> until we reach that final frontier -- >> computer, end program. >> reporter: i remain dr. jon lapook, cbs news, new york. and that's the "overnight news" for this friday. for some of you the news continues. for others, check back a little later for the morning news and "cbs this morning." from the broadcast center in new york city i'm anthony mason. thanks for watching. >> announcer: this is the "cbs overnight news."

>> announcer: this is the "cbs captioning funded by cbs welcome to the overnight news. hurricane maria is lashing the turks and caicos island. as it continues its devastating march across the caribbean. maria destroyed thousands of homes in puerto rico, flooding towns and touching off mudslides. power is out on the entire island and president trump has declared the island a disaster area. david begnaud has the story. >> reporter: in the small town of toa baja, hundreds of residents were rescued by the national guard, most packed into trucks while scores of others waded through two feet of water, carrying what's left of their possessions. in the san juan suburbs, residents forged through flooded streets, heading to the only

open grocery store. only five were allowed in at a time to avoid chaos. maria inflected damage on 80% of the homes here and like the rest of the island, there is no power or phone service. we rode with the mayor as he surveyed the damage and watched these young men help police rescue a 91-year-old man in a kayak. outside that man's house, his neighbors wept. his home was surrounded by chest-deep water. how are you feeling, i asked him? i'm good, thanks to the virgin mary, he said. it wasn't any different here where teams went house to house rescuing the sick and elderly. at this shelter, residents nervously checked makeshift lists looking for names of family members who were safe. janice longoria has been looking for her 77-year-old aunt since yesterday. >> she's an elderly person.

so i don't know how is she? it's hard. >> reporter: for those families who were able to reconnect -- words can't describe. the governor of puerto rico says two-thirds of this island are a disaster zone tonight. the airport in san juan reopened today but only for military and emergency operations. and amid the misery we have seen resilience. as one man told us with a smile on his face, we're used to this. and central mexico, families are holding out hope that their loved ones can be pulled out alive from the rubble of hundreds of collapsed buildings. the earthquake devastated the city and small towns and villages. manuel bojorquez is in mexico city. >> reporter: at the start of the day, rescuers believed a 12-year-old girl was trapped in this crumbled school. the drama riveted the nation as crews used thermal cameras to figure out how to reach her.

[ speaking foreign language ] they brought a teacher to the scene believing the girl might hang on if she heard a familiar voice. but by late afternoon the government announced the signs of life were likely an adult, possibly a janitor, not a student after all. elsewhere, crews mounted rescues through small cracks in the rubble, pulling survivors to safety. [ speaking foreign language ]. others mourned. near the epicenter 11 members of one family were killed when a church collapsed during a baptism. the violent quake struck on the exact anniversary of the catastrophic 1985 quake that killed nearly 10,000 people. but this time, the city's seismic warning sounded and people ran into the main square. engineering professor sergio says it's a new line of defense

as are stronger building codes. >> i would say the type of structure used in mexico city now is a structure where more walls are being used aside just from columns and beams and that makes the structure stiffer and stronger. >> reporter: but stricter building codes did not prevent this collapse. guadalupe is still searching, waiting for her son, gustavo. >> do you wish you could be in there yourself, searching, yourself, for him? her son is among 40 people listed as missing from the collapsed office building behind me. and you can see from the wet roads here that a thunderstorm rolled through this evening, hampering the rescuers efforts. the white house is tightening the financial screws on north korea over its nuclear and missile programs and the administration hasn't announced whether the u.s. will pull out of the nuclear treaty with iran. margaret brennan reports.

>> reporter: president trump wants to renegotiate the 2015 agreement that froze iran's nuclear program. in exchange for lifting financial sanctions. >> that deal is an embarrassment to the united states and i don't think you've heard the last of it. >> reporter: he wants a longer, more stringent deal and is trying to force the issue by accusing iran of not complying with the terms of the existing deal even though all five other signatories including russia and china, say otherwise. so does the secretary of state. >> iran is in technical compliance of the agreement. >> reporter: iranian president hassan rouhani says his country will not renegotiate and warned a u.s. pullout would have broader imp cases. >> is there a diplomatic way out? >> talking would be a waste of time, he said and no other government would be willing to negotiate with a country that tramples on its commitments. walking away from the iran deal

may complicate efforts to get north korea to give up its nuclear weapons. >> if we back away in any way from our nuclear agreement with iran, we send a signal to north korea that a future president might unravel their deal too, so it is a disincentive, strong disincentive for north korea to come to agreement with the united states. >> reporter: secretary of state rex tillerson said he is optimist take the u.s. can handle both threats. >> the threat is the same but the nature of the agreements are going to be quite different in terms of what's necessary to achieve the objective, a denuclearized north korea and an iran that never pursues nuk weapons. this photo of sean spicer appears to validate reporting that spicer kept copious notes during the campaign and while at the white house. those notes have drawn the attention of special counsel,

robert mueller. the portion of spicer's notes visible in the closeup of the picture refer to top administration officials, r.p. for reince priebus, rex for secretary of state rex tillerson, the photo was shot at an april press conference with president trump and the secretary-general of nato. spicer refused comment on the photo or the suggestion his notes could become part of mueller's investigation into russian meddling and the trump campaign. on abc this morning, spicer deflected all mueller questions. >> has the mueller team reached out to you at all? >> i'm not going to discuss that issue at all. >> have you hired a lawyer? >> i'm not going to discuss that issue at all. >> so you haven't been subpoenaed? >> i'm not going to discuss that issue at all. >> did you ever hear inside the white house that mueller should be fired? >> i'm not going to discuss that issue at all. >> as press secretary he tried several ways to undercut the russia story. >> if the president puts russian salad dressing on his salad tonight, somehow that's a russian connection.

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>> announcer: this is the "cbs overnight news." >> scooter braun may be the most powerful entertainment figure you have never heard of. he organizations rock concerts and benefits. his clients include the black eyed peas. gayle king got to speak to braun about life and his newest client, kanye west. >> we've been friends a long time and all of a sudden one thing led to another and i told him i probably shouldn't manage you. we're friends. better not doing -- he goes you need to be a part of the team. i said let's get together in a week and we'll see. and like the next day i get a phone call from adidas and def jam saying we're told to call you, you're in charge. and i get a phone call saying that you're in charge.

>> really? the next day? >> seen acalled kanye and he said i don't have time to wait. you're in. >> reporter: kanye west is one of many artists on scooter braun's roster. braun's artist management and entertainment company now has 28 clients. ♪ including carly klauss and ariana grande ♪ >> reporter: after a decade in the industry he may be best known for discovering a 13-year-old kid from canada. you're the one who discovered justin bieber on youtube. and you saw him and thought what? >> i was blown away when i heard him sing neo's "so sick" because he sang with such soul. and i thought here's a kid who could do that michael jackson model of angelic songs that made you believe in love again before you grew up and got jaded. ♪ >> reporter: braun helped guide

bieber from internet obscurity to global recognition. ♪ >> reporter: it's been a ten-year career full of public highs -- >> you are charged with the following -- >> reporter: and lows. ♪ in july he cancelled the remaining 14 days of his world tour. he apologized to fans, citing struggles with broken relationships and insecurities. he's now cancelled the tour. was that a difficult decision? >> extremely. you know, i think, it will be -- >> reporter: again people think he's having issues, what's going on with him? seems to be falling in another dark place. true, not true? >> he will decide to tell people what happened when he's ready. of what exactly happened. but i think he was making a decision to protect himself. but he's 23 years old now. and if -- >> he's a grown up. >> reporter: if he makes a decision as a man as long as he is willing to listen to opinions and hear people out if he has conviction i'll have his back.

>> reporter: braun says that bieber is not just a client but family. >> that's not funny. turn it off. >> reporter: but admits the trials throughout his career have at times been difficult. did it strain your relationship? >> absolutely. i wasn't willing to be a yes man. and i had never been through it before. he was going through really hard times and for a year and a half i failed. >> you failed? >> completely. i tried every single thing to get him back on the right track and i failed time and time again. and my dad gave me great advice. he said your responsibility is not to change him but to be a rock. >> reporter: you're close to your family, your mom and dad in particular. and i think -- is there something that stands out to you about the lessons that your dad taught you? >> there was one day when i was 14 years old and i got in trouble for a white lie a couple days earlier and he said i want to talk to you and i said okay, what's up? he said you lied and we caught you and i keep thinking about

how well you lied and i want you to know i know you're a liar. and my dad was my hero. so him calling me a liar, that hurt. big time. >> how did that affect you, scooter? >> i was shaken and i said, you know, i'm going to go through life and be successful but i'm going to do it with integrity. i don't want to be a liar. ♪ >> reporter: lately braun has been mixing entertainment with philanthropy as executive producer of the hand in hand telethon -- ♪ -- that raised over $55 million for victims of hurricanes harvey and irma. in june of this year he organized one love manchester. >> you look fear in the face and you said no, we are manchester and the world is watching. ♪

♪ somewhere over the rainbow >> reporter: a benefit concert to pay tribute to the 22 killed in the terrorist attack at ariana grande's concert two weeks earlier. >> did you have second thoughts about doing a benefit concert so quickly in that area? >> we got no from a lot of people saying it's too soon and you can't do this. we were feeling like we have to do it now and quickly. that's the statement. we didn't want to be disrespectful. we reached out to the families and the victims and they were overwhelmingly supportive. >> i know it took a lot of people i get it but you must take personal pride in this. >> i take pride in the fact that we defeated this idea that people should be afraid to live their lives. >> reporter: in addition to his work, braun continues to expand his brand. as for rumors about a future in politics? >> there have been reports that california democrats are

lobbying you to run for governor of california. it sounds like you are at least thinking about it? are you at least thinking about it? >> i'm thinking about getting more involved with our leadership and thinking about what can i do to help as a citizen and you know, what can i do with the platform i've been given to try and lead people to a place to remember the same people you are yelling at are the people we are claiming to help.

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oysters you love them or won't put one in your mouth but either way they are big business these days, faith salie reports. >> blue points, beaver tail, conway cut, cutie hunk. bob, the sweetie. >> reporter: ask the chef what's on the menu at the grand central oyster bar in new york city, and you may be there for a while. >> will miyagi, rip tide, saddle rock. summer side -- >> reporter: it wasn't always this way. >> i started in 1990. and for about the first seven or eight years, very difficult to buy a lot of different varieties of oysters. there weren't any around. >> reporter: in case you didn't know we are in something of an oyster renaissance. walk into a restaurant like this one in brooklyn, and you can fine oysters from hundreds

of places from around the country and beyond. now if you think all this oyster slurping is nothing but a fad -- consider these thoughts from rowan jacobson. >> when you pick up an oyster you are kind of reliving this very early experience of humanity, which is eating a raw animal live out of its shell. an oyster is live up to the moment you shuck it and after you shuck it, it's unclear how dead it is, right? so you're doing something that is definitely not a party of normal, you know, civilized life. and there's an intensity to that experience. you know, it's just like one-on-one, you and the oyster. >> reporter: and as more and more americans experience that rush, oystermen and women can't keep up with demand and prices are higher than ever. but today's story of the north american oyster doesn't begin in

fancy restaurants or the depths of the oceans but here, where the water meets the land at america's oyster farms. >> i'm looking at a farm? >> yes. there's the buoys out here, the yellow buoys are the corner markers of the farm. >> reporter: skip bennett has been raising oysters across from massachusetts's cape cod for 20 years, suddenly adding new farms to keep up with demand. >> how much has your business grown since 1995? >> about 40% annually. >> reporter: he and his team raise the oysters in the hatchery and move them to several farms in the bay and nearby creek because it turns out with oysters, not unlike wine, geography matters. now are the oysters from your new farm going to taste different from the oysters from the original? >> they do. we are starting to taste the oysters.

they've been out here for a couple of months and they taste quite different. >> how? >> it has to do with the location and oyster farming it's the is a -- salinity and the type of food in the water and the chemistry of the water. >> reporter: now get this, oyster farmers never have to feed their livestock. they consume algae and plankton. they are in effect tiny water filters and so good at it they can turn murky water clear. incredibly, a sungle oyster can filter 20 to 50 gallons of water a day. >> they are the greenest critter in the ocean. it's almost miraculous. you put baby ones in the water, wait two years, take out big ones, good to go. >> they seem they should be the food of the future. >> you're not the first person to say that. a lot of people are look at oysters and clams and mussels as a really potentially huge source

of food for the future. >> reporter: and you might be surprised to learn that we wouldn't have this bounty of bi-valves were it not for the clean water act of 1972. >> the waters in the northwest, particularly puget sound area are quite a bit cleaner than when i grew up. there was a pulp mill that was still functioning when i was born and basically the waters here were a dead zone. there wasn't much that grew here. >> reporter: bill taylor's family has been raising oysters around shelton, washington since the 19th century. today just across the bay from the town's closed pulp mill, oystermen work to harvest a species native to japan. >> we sell around 35 million oysters, live, each year. >> reporter: that's a lot of oysters. and this is probably the right

time to confess that, until shooting this story your correspondent had never tasted a single one. >> how would you turn someone who never wants to try an oyster into someone who wants to try one. >> as long as they are willing to give it a try. you talk about the flavor and to me, it's like the smell of the beach. if you have ever been at the beach for the day in the afternoon when it starts to cool down and the beach smells sweet and salty and you can smell the air. >> reporter: i came and i smelled the air and tasted my first oyster. >> and then we're going straight down the hatch. >> only for you, i'm telling you. cheers. this way, right? and i take the liquid and everything all at once? okay. it tastes like the ocean. >> yeah.

>> i didn't chew it. i'm sorry.

for many people who live or work in manhattan, the united nations general assembly can't end soon enough. with all the foreign dignitaries in town, parts of the city are in gridlocked. there are frozen zones and blocked off streets and highway entrances all over the east side. even if you move away from the u.n. you can be caught behind a police motorcade. leading the motorcades can be a dangerous job and it is left to the most highly skilled cops on two wheels. kris van cleave reports. >> reporter: there are more than 120 world leaders in town for the u.n. that means more than 170 motorcades need to be done. it's a lot of work and the whole goal here is to get the

dignitaries where they need to go as quickly and as safely as possible. as they ride past it looks so easy. nearly two dozen motorcycles clearing the way for the president. but it's the culmination of a year's worth of planning and practice. president trump is one of 11 world leaders currently attending the u.n. general assembly that get a continuous high-risk nypd escort as long as they are in new york. >> is this like the motorcade super bowl? >> exactly. >> reporter: thomas is a former motorcycle officer. >> we call them the a-team. they are the best riders in highway district and selected because of their skill. >> reporter: long before they hop on a harley, they have to make it through a grueling 20-day training course. only about half pass. we got special access to their training facility and watched officers practice motorcades. a few ride ahead looking for potential threats and block roads until the motorcade passes, then race to get back to the front. others stay in a wedge formation

in front of the president or dignitary. >> we have to be ready for everything. >> reporter: sergeant joseph murphy is riding in the president's motorcade this week. during his 35-year career, he has worked on at least 75 presidential escorts. >> like i tell the new students when they come in, when they came on this job they get a ticket to every major event in the city. when they are in the highway patrol they get a front-row seat. >> reporter: this job is not without its risks there have been several officers injured or killed in motorcade accidents in recent years. this unit also escorts the vice president, even the pope and any visiting heads of states that come outside of the u.n. general assembly. when they're not doing that they make up the highway patrol. that's the news for this friday. check back with us later for the morning news and of course, cbs this morning. from the broadcast center in new york city.

captioning funded by cbs it's friday, september 22nd, 2017. this is the "cbs morning news." tensions rise. president trump offered tougher sanctions against north korea as kim jong-un lashes out at mr. trump calling him deranged and promisi promising revenge. facebook is changing its policies. >> we can't prevent all governments from all interference but we can make it harder. and recovery efforts are under way in puerto rico after hurricanma