have a larger amount than that. the existing loans that are in place right now, will be grandfathered in. >> there are other impacts on homeowners as well? >> there are big changes to how the treatment of home equity lines and home equity loans are going to be handled in the future. right now you can deduct interest on that. so, going forward, you will not be able to do that. for both existing and new loans. now this is important, because, i think many homeowners use these as life lines, used to pay down credit card debt, maybe a tuition payment, emergency in your home. they're low interest alternatives to sort of have this emergency reserve fund available. >> a lot wondering how this may affect real estate markets? >> talk to experts. a minimal amount up to a 10% hit on prices. and, here's why. with the near doubling of the standard deduction and this limit on state, local and property taxes, some folks are going to sit on the sidelines wait to see what happens. that is happening at a time where we have seen home prices actually increase in value from the top of the market. have to wait and see. hopefully not a big dip. >> jill thank you. >> thank you. >> the trump administration pointed the finger at north korea for a massive cyberattack last may. dubbed wannacry, the attack was a giant extoretion scheme that disabled computer systems worldwide. jeff pegues has more on this. >> reporter: even though early signs pointed to kim jong-un's regime, the u.s. took its time officially assigning blame for the cyberattack. >> we are going to hold him accountable and, going to shame him for it. >> seven months later time is up for north korea. tom bossart, the president's homeland security adviser. >> north korea wants to how the world at risk whether through nuclear missile program. >> they did not find a smoking gun linking wannacry to the north koreans. what they did find they say were cyberfingerprints within the malicious code. the hackers began targeting computers in asia may 12th. soon, 200,000 computers and 150 countries were infected. hackers concealed data and claimed they were the only ones with the keys to unlock the code. their digital ransom note demanded $300 in bitcoin within three days or $600 within seven days and posted a countdown clock threatening the files will be lost if the ransom was not paid. why is kim jong-un doing this? >> adam myers with the seer security firm, crowd strike. >> i think the ransom ware el moment may have been part of the guide ns thance to generate rev. lots of things north korea is involved in to generate revenue to fund they're nuclear program and operations. >> north korea under u.s. sanctions was behind at take on sony pictures computers three years ago. >> want to go kill kim jong-un. >> in retaliation for a movie the interview, depicted assassination attempt on the north korean leader. the wannacry ransomware developed by using leaked nsa hacking documents. the leak is still under gaichlgts jef investigation. jeff. >> jeff, thank you. a look at stories we are following in the news feed. airlines back on schedule after a fire and blackout sunday at the air port in atlanta. all passengers should be reunited with their bags by thursday. the fbi has joined the investigation of the outage. but there is no indication of criminal activity. major advance in gene therapy. fda approved the treatment today that can improve the sight of people with rare form inherited blindness. may cost up to $1 million per patient. >> the most common password used. as usual, topped by 1, 2, 3, 4, 5, 6. password with a capital p. new this year, let me in. that is a password. i love you. starwars. and whatever. also trust no one which is good advice. the list is based on millions of pass words leaked in data breaches in the past year. ♪ ♪ >> it's the newest kind of robocall, called the neighbor scam. >> the best thing just try to not be a victim. ♪ ♪ >> the green grocer with the golden voice. ♪ ♪ ♪ >> interactive exhibits that actually want-up to bring this. we w ok, let's try this. it says you apply the blue one to me. here? no. have a little fun together, or a lot. k-y yours and mine. two sensations that work together, so you can play together. jack and jill went up the hill to fetch a pail of water. all because of a burst water pipe in their house that ruined the hardwood floors in their kitchen. luckily the geico insurance agency had helped them with homeowners insurance and the inside of their house was repaired and floors replaced. jack and jill no longer have to fetch water. they now fetch sugar-free vanilla lattes with almond milk. call geico and see how affordable homeowners insurance can be. call geico she's had a tiny cough. see you at 5! seriously? protection. lysol kills over 100 illness-causing germs and viruses, even those that may cause coughs. lysol. what it takes to protect. hard to find any one who likes robo calls. why are they getting so much more freak went? robo calls reached record levels, 230 million numbers on the do not call registry. here is anna warner. >> they're the annoying phone calls that plague americans. >> you qualify for a 75% savings. >> robo calls, computer generated phone calls trying to sell you something or scam you. the government says, 99% of computer generated sales calls are illegal. and blocking service hiya says this year americans got 76% more robo calls than in 2016. record 18 billion scam calls. reg lators have talked about cracking down. why are the numbers of calls going up then? >> hya avenue jonathan nelson. >> do not call lists have been effective for legitimate businesses controlling how and when they can reach out to us. but the calls that we are still receiving are, are, ill lee ganl their message. so they're not hesitant to use illegal methods like, robo calling. >> favorite tactic company's an am sis says what is called the neighbor scam. using soft ware to mimic the first digits of your phone number. area code and next three digits to make you think that a nearby friend or business is calling. another, claiming to be your utility company. to get your personal and financial information. so, why haven't efforts to stop the calls worked so far? >> the trouble is there is a lot of money in this. there its -- billions of dollars that can be made. so, the scammers are likely to come up with a new tactic. it is a bit of a game of cat and mouse. and we are always, at a disadvantage. >> well the fcc doesn't track calls just complaints. it says unwanted calls are the top consumer comcomplaint. there is no quick fix. install apps to block calls. or don't pick up the phone, jeff. >> good luck with all that. >> hard to do. >> hard to do. >> thank you very much. i'm so frustrated. >> hard to do. >> thank you very much. i just want to find a used car without getting ripped off. you could start your search at the all-new carfax.com that might help. show me the carfax. now the car you want and the history you need are easy to find. show me used trucks with one owner. pretty cool. 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>> still figuring that out. cars everywhere down on to the highway. >> people were screaming, it was crazy. >> adrian thompson said first time on a train in years. >> just a whole punch of pounding and rocking of the train. just grabbed on to the chair in front of me. my laptop went flying. phone went flying. >> start to see the roof kind of peel, you are like is this ever going to stop. and it stopped. when it stopped it was black. >> the train had left seattle headed for portland. this was the first run on a faster new route. designed to shave off ten minutes. the national transportation safety board says the train was traveling 80 miles per hour ahead of the curve. over the interstate. where the speed limit drops to 30. at about 7:34 local time the train approached the overpass where one of the engines and 12 cars derailed. >> it wasn't easy for the firefighters to got through. they were using jaws of life. different forms of saws to be able to get into some of the crushed cars to get access to people and get them out. >> the ntsb will fry to figure out whether something other than speed play aid role in the crash. >> is there any indication there was an object on the tracks prior to the derailment? >> that tree maeremains to be determined. the scene has been preserved looking at it carefully with our rail experts. >> the mayor of the city where that train passed through, minutes before the derailment. raised safety concerns about the new route. carter evans has more on the investigation. >> weave a always felt the rewa wasn't big enough to take on the risk. >> lakewood mayor don andersen feared for years that amtrak's high speed cascades route would lead to disaster. >> public safety was our primary concern with this line coming through. people being on the tracks and trains coming off the tracks. in a hype leap urbanized area. >> of at city council meeting earlier this month he urged state transportation officials to improve save teef alofety al line. >> come back when there is said accident to justify not -- >> the nearly 15 mile bypass where monday's crash occurred was designed to save time avoiding curves and traffic on the old route allowing trains to reach speeds of nearly 80 miles per hour. amtrak says, all right mattic braking neck nolg known as, positive train control, or ptc, was not activated on the tracks at the time of the derailment. federal investigators have found ptc could have prevented rail accidents including a 2015 amtrak derailment in philadelphia, that killed eight. deborah hersman former chairperson for the ntsb. >> nationwide we need positive train control on all passenger routes. this technology is within reach. and it is because of the dollars that need to be spent that delayed impl delayed implementation. amtrak began installing positive train control in 2000. plans to be compliant with all railroads,000 by 2021. amtrak officials did upgrade several crossings and worked to inform the pub lake but the new train tracks. >> we are learning more about the mysterious death of a canadian billionaire and his wife. barry sherman was the 12th richest man in canada. the couple found dead friday in their toronto area mansion. the police are calling the deaths suspicious. here is tony dokoupil. >> forbes ranks barry sherman as 12th richest man in canada with net worth of $3 billion. he was also generous giving away more than $50 million to charity. because his company made cheap generic drugs, sherman had plenty of rivals. toronto homicide detectives are leading the investigation into the deaths of barry and hon neap sherman. a police spokesman calls their deaths suspicious after initially saying they found no signs of forced entry, and were not searching for suspects. >> until we know exactly how they died, we treat it as suspicious. then once, that, that, wujs determination its made by the pathologist and coroner, then weep move forward from there. >> the global and mail said the couple was found hanging from the railing of their basement pool and that investigators theorized the 75-year-old billionaire killed his wife and then took his own life. the family criticized unnamed police sources saying in a statement, our parents shared an enthusiasm for life and toeltly inconsistent with the rumors regrettably circulated in the media. >> we are in your corner. >> sherman's company, apotex has annual sales of $1.5 billion, makes and exports generic brand name medications putting him at odd with drugmakerers. >> he fought for what he really thought was right. and provide generic drugs that made it possible for those that weren't on drug plans to, to, get the drugs that they needed for the ailments that they suffered through. >> businessman, paul gotfry and wife gina were long time friend of the shermans. >> just absolutely, gob smacked, it's, shocking, you know it just leaves shivers all over you. >> a spokesman for the family tells cbs news, a memorial service planned for thursday. canadian prime minister, justin trudeau offered condolences. the cbs yoif"overnight news will be right back. ♪ ♪ olay ultra moisture body wash gives skin the moisture it needs and keeps it there longer with lock-in moisture technology skin is petal smooth after all, a cleanser's just a cleanser unless it's olay. that cough doesn't sound so good. take mucinex dm. i'll text you in 4 hours when your cough returns. one pill lasts 12 hours, so... looks like i'm good all night! why take 4-hour cough medicine? just one mucinex lasts 12 hours. let's end this. she's had a tiny cough. see you at 5! seriously? protection. lysol kills over 100 illness-causing germs and viruses, even those that may cause coughs. lysol. what it takes to protect. it says you apply the blue one ok, letto me. this. here? no. have a little fun together, or a lot. k-y yours and mine. two sensations that work together, so you can play together. >> this is the cbs "overnight news." a florida high school is being investigated as the possible source of a cancer cluster. health officials are asking any alumni and faculty that got sick to send in their health record. manuel bojorquez has more from bradenton, which is just south of tampa. >> reporter: this 'tis where bay shore high school stood. torn down in the late 90s in place of a bigger campus next door. suspicion as the but health problems linking back to the old prompt have been around for decade. last week the school district mailed these forms to thousand of former students asking anyone who has become sick to tell their stories. >> i can't look at a yearbook. i don't see classmates. i see victims. >> cheryl josa graduated from bay shore in 1981 two years after older sister taefrmt in 1999 doctors diagnosed terry with rare type of leukemia. she died six months later. a few years after her sister's death. josa learned another bay shore classmate had also died of leukemia. she said a light went off in her head. >> you would talk to this person the they've would say, so and so's sister died of leukemia. the numbers i have reported are from word of mouth. by speaking to people, people writing to me. >> josa believes cases at bayshore constitute a cancer cluster. >> my sister's dallclass of 234. four leukemias reported. three passed away. >> the cdc, defines cancer cluster greater than expected number of cancer cases that occurs within a group of peoplen a geographic area over the period of time. over the last 13 years, josa tracked nearly 500 cases lichb i beenking bayshore to cancer, auto immune diseases or children with birth defects. >> it is very daunting to find the smoking gun or the cause of a cluster. >> dr. thomas burke teaches at johns hopkins bloomberg school of public health. >> to define a cancer cluster you have to be sure of the diagnosis of people. you have to be sure of the number of cases, you have to look at the time involved. >> paul pa duchdsi was in josa' class. doctors diagnosed him with leukemia. >> agriculture class, grew strawberries on the field. good chance it could have come from something out of the ground. >> years of soil and ground water testing on the school property have found no significant contamination. there was contamination a mile away, at an old machine shop. but of the county believes it did not impact the school. manat tech manatee school board asked to survey alumni staff. dr. diana green is the school district superintendent. >> the facts at this point indicate over the last 15 years, that location has the been tested numerous times, and each time it comes back with a negative indication related to a possible cancer cluster. >> this is a picture of my son. heave would be 42 today. >> for community members and family of the sequester and dead the search for answers has been long. >> and in 2014, of october, i was diagnosed with brain cancer stage three. >> last april many voiced their frustration at county commission meeting. >> when this is all said and done. they will come up with their findings. if they've don't necessarily reflect what you believe do you keep going? >> i will keep going until we find out what it is. we have a right to mow what we were exposed to. >> cheryl says she suffers from auto immune diseases. the health department will stop collecting medical information end of february. it will then be transferred over off to the university of miami. and results are expected sieks months after that. >> the cbs "overnight news" will be right back. ok, let's try this. it says you apply the blue one to me. here? no. have a little fun together, or a lot. k-y yours and mine. two sensations that work together, so you can play together. a kwiewild rescue helping p rhinos from the brink of extinction. the south africa black rhino has reputation for being aggressive. weighs a ton and lives in places that are hard to get to. that's why, a rare conservation effort has the animals flying high and upside down. laura logan shows us how in aster for "60 minutes." >> reporter: take one 1400 pound black rhino who had been darted and sedated. >> a young female. six, seven years old. >> two veterinarians. >> with black rhino lots of things can go wrong. >> three game capture specialists. >> now putting straps on the feet. >> four leg straps. >> 52-year-old, huey helicopter and its pilot. >> add potentially legal, 130-foot chain. >> keep an eye on the chain, worried it swinging into someone any face. >> and you get this. >> whoo, look at that. oh, my god. wow. >> never tire of seeing it. >> this feat of engineering, ae aerodynamics, and conservation has been choreographed by jacques simon, a veterinarian moving the rhino to save them. >> why did you start flying the rhinos, transporting by helicopter instead of by road or other means? >> some of these rhino in very inaccessible parts of the reserve. this method of air lifting them, provided us with an opportunity. i thought this is the solution to our problem. getting them out of rugged mountainous or thick forested areas where vehicles cannot go in. >> with more than 100 square miles of mountains and ravines the game reservewhen we joined terrain they were searching for three rhinos for relocation. part of the plan to protect them from poachers and increase their number. >> why did you choose the black rhino to focus on? >> it didn't choose it. it chose the itself. it is in trouble. >> so how many black rhino were there in the country when you began? >> there were about 2,500 in south africa. when we started the project. >> that was 15 years ago. the black rhino was a critically endangered species. to get the numbers up, he started the black rhino range expansion project. with the help of the world wildlife fund. the idea was to take a small number of rhino from government parks, and settle them in new places. most leave on private land. where they would breed and create new populations. >> so you got the word out to people. off a we got the word out we were looking for land for black rhino. it worked amazingly. the 20 black rhino or however many get put together on a new block of land. and, are left to breed. and we wanted to put 20 because that is genetically viable number. >> lemond's team captured the rhino by darting them. then driving trucks in to pick them up. but when they ran out of road, they turned to the skies. >> it's spectacular and unbelievable. an also slightly distressing at the same time. sort of everything. >> you really have to put your mind at rest that animal physiologically is not being harmed in any way. >> dave cooper has been the chief veterinarian for the parks for 22 years. he says the rhino are usually in the air for less than 10 minutes. and fully sedated the entire time. >> as if the animal is really uncomfortable, but, we have done our home work. we didn't just do this. and see if it was going to work. hung rhino with cranes, and vitals and sophisticated equipment. >> didn't you vol unteer to han yourself upside down. pilots wouldn't let me. >> vets wanted to hang upside down. anything that can walk on its feet can hang by its feet. >> the pilot, dave cooper have been working together from the beginning. he told us, the huey helicopter he is flying for this can hold two tons. more than enough to lift a black rhino. >> but you have done how many now? >> this will be 198. >> almost 200. and lost none. >> yeah, today will be 200. >> what's the most difficult >> putting it down. >> so you don't hurt the animal. >> we saw just how difficult it can be, as he struggled to land the first rhino. he got it down safe and unhurt on the second try. vet dave cooper was already of in another smaller helicopter. looking for the next rhino. >> here we go. >> yeah. >> heap pressed darts for the tranquilizer gun with a des to knoto -- des to knock the animal out for 30 minutes. the first dart didn't pierce the inch thick skin. three minutes later. his second shot stuck. they tracked the rhino till it dropped. we were right behind him in the huey. with jacques lemond and the game capture team. >> i see the rhino down. how many minute now do you have off to get the rhino? >> we got it in time. >> as soon as we landed, it was a race to get to the sedated animal. dave cooper's priority removing the tranquilizer dart and treating the wound with an antibiotic. >> the dart went in and out. put another one in. >> uh-huh. >> that is the first thing you do its cover the eyes. >> right. that stops them. >> is this male or female? >> this is male. >> he is young and has many years of breeding ahead of him. exactly what they need. they ided him from notches in his ears. most rhino in the parks are marked this way. >> is that him breathing. >> breathing. >> deep, breath rz. happy with that. >> of the game capture team. create a path to above. >> the helicopter is now going to come. they're going to hitch of the four to the central hooks. >> the pilot maneuvers in the chain. and swept the rhino away. it took them less than 16 minutes. for dave cooper, a small victory every time. >> because? >> they mean a lot to me. >> as a vet, you are the one that gets called, out when the poachers have been there. and they hacked off the horn and the animal is bleeding. is that very difficult for you? >> yes. so much negativity around rhino at the moment with all the poaching to. beef involved in something like this is what lifts you and keeps you positive about things. >> to watch the full report go to cbs news.com and click on "60 recent study found 95% of am cans use a cell phone. many wonder if cell phone use can bebad for your health. california health officials issued groupd brend breaking guidelines to dial down the risk. john blackstone. >> reporter: the warning abut keeping a cell phone pressed up against your ear was issued largely because radio freak when seep emissions could be damaging particularly to children. >> now children on average are starting age of 10. and using cell phones for a lot of activities. >> california's department of public health recommend using the speaker phone or headphones. sleeping at least an arm's ling@way from it. and avoiding keeping it in your pocket. the move comes after a three year long legal battle by joel moskowitz who forced the state to release a long secret study of cell phone risk. has california been suppressing information about dangers of cell phones? >> i think that's safe to say at this point. there has the been considerable amount of suppression. they've wouldn't call it that. they would claim the science wasn't strong enough. >> reporter: california's warning says while science is still evolving stom studies suggest aft link between high cell phone use and brain cancer. lower sperm count. and headaches. certainly those who say, this is going to cause panic. >> people are not going to give up these devices that's not what we are seeking. we are seeking is that people, people take the appropriate cautions and reduls thece their. >> he sees parallels with the decade of debate over whether or not smoking was a health risk. >> just like the history of toef back co-. off off unlike sig reltcigarett they're useful. uncovered tobacco company research that revealed dangers of smoking. watching science on cell phones. >> the case is by no means closed. there is certainly enough evidence off to be concerned to the point that i dent usually carry's cell phone. >> california its not alone in the warning. the food and drug administration says on its website. the risk is probably very small. bumt suggests using speaker mode, or a head set. and apple include a warning of sort on all iphones. but it is noty to find. you have to go to settings. general. about. down to the bottom here to legal. then, to rf exposure. where finally apple suggests you use the speaker phone or head fe fe phones to reduce exposure. >> that's the news for wednesday. for some the news continues. for others check back later for the morning news and of course cbs this morning. from the broadcast center in new york city. i'm don dahler. captioning funded by cbs it's wednesday, december 20th, 2017. this is the "cbs morning news." the tax cuts and jobs act is passed. >> republican senators get through their tax overhaul measure overnight, and it's expected to head to the president's desk today. a tour bus crash in mexico leaves at least 12 people dead. and frozen in time. a woman gives birth to a child that puts the newborn in the record books. good morning from the st