women around the world where there is zika and what an effective safe vaccine would mean in terms of stopping the spread of zika also peace of mind. >> thank you, john. >> we have a lot more information about zika on our website. go to cbsnews.com/zika. terrorism is not suspected but we don't know yet what caused a crash landing to day in dubai. an emirates airlines jet burst into flames after hitting the runway. but everyone got out alive, the boeing 777 was arriving from southern india. elizabeth palmer is following this. >> reporter: skidding down the runway on its belly. the first video of emirates 521 shows it billowing smoke. minutes later, it exploeded. >> ooh. >> reporter: just before that explosion smartphone video inside the cabin shows alarm, but no panic. some people even take down their suitcases. but, 60 second later the cabin crew is sounding desperate. leave the luggage she is shouting. jump. jump. outside you can see the neighboring emergency chute apparently unusable. all got away safely. amazing as not all of the exits were working. in fact, passengers told cbs there was only one. >> everybody get out through one way. single door. nobody get out from any other place. >> reporter: emirates says there is no evidence this was a terrorist attack. rather, extreme heat and wind sheer or turbulence may have been a factor. charlie, in an audio recording we have heard the control tower gives the pilot on his final, final approach, permission to land. then 20 seconds later tells him to climb to 4,000 feet. it was moments after that that the plane hit the runway hard. u.s. crash investigators are now heading to dubai to help in the investigation. >> elizabeth palmer in london. litz, thanks. a police office r who works for the washington, d.c. subway system charged today with trying to send money to isis. he is the first law enforcement officer to face federal terrorism charges. more now from jeff pegues. >> reporter: the transit police officer who appeared in court today, was already in custody when investigators swarmed his fairfax, virginia, home. nicholas young may have been expecting this day. according to court documents, five years ago he told an undercover officer that if law enforcement ever searched his home they would have issues because he was stockpiling weapons, and that is what amphetamines, ballistic vests and assault rifles were for. authorities do not believe young was planning an attack ton washington's transit system. but their investigation does allege he was providing financial support to isis. according to court papers, young bought gift cards to give to isis operatives who he thought would use them for untraceable mobile messaging accounts. he actually was giving them to the fbi young allegedly wrote, glad it came through. getting rid of device now. six years ago young turned up on the fbi's radar because of his association with known terrorism suspects. including a man arrested in 2012, for plotting a suicide bombing in the u.s. capitol building. charlie, the court has the not yet apointed an attorney for the suspect. >> thank you, jeff. >> some one is coming up with a way to prevent telemarketers from getting through. we'll have that next. so, please hold. ♪ music extraordinary starts here. new k-y intense. a stimulating gel that takes her pleasure to new heights. k-y intense. ylysol with hydrogen peroxide. bleach. for a tough clean with zero percent bleach. lysol that. marcopolo! marco...! polo! marco...! polo! marco...! polo! marco...! sì? polo! marco...! polo! scusa? ma io sono marco polo, ma... marco...! playing "marco polo" with marco polo? surprising. ragazzini, io sono marco polo. sì, sono qui... what's not surprising? how much money amanda and keith saved by switching to geico. ahhh... polo. marco...! polo! fifteen minutes could save you fifteen percent or more. polo! it happened right about now. just sitting down to dinner or watching television and the phone rings. it's a robo call or telemarketer, or worse, a con artist. phone scams cost americans $350 million a year. but now there may be an answer to those unwanted calls. here is jim axelrod. >> heather at account services. >> it's hard to think of anything more irritating. >> hi, this is josh. >> than the robocall. >> those computer generated calls that always seem to come at the worst time trying to sell us something, if not scam us outright. >> the reason of this call is to inform you that the irs is filing lawsuit against you. >> reporter: in the first four months of this year, american phones received some where near 10 billion robocalls. a record pace and explains why complaints to the federal trade commission are up 50% this year. >> these calls are abusive and illegal. >> lois greaseman is with the ftc. >> some of the calls are fraudulently pitching goods. they're offering something that doesn't exist. >> what about the ftc's do not call list. that's not proving to be much deterrent for scammers. >> here, seven, eight, nine calls in the same second that came in blocked. >> reporter: which is where aaron fox comes in. >> we have anti-virus on computers, servers, fire walls, e-mail, spam filtering. we don't have anything protecting voice calls. >> he developed nomo-robo. software that detects high frequency calling patterns, answers any robo generated number calling and hangs up before you have to deal with it. >> it will make a test call. see when you pick it up. that's it. now that is protected. >> no more robocalls come to the phone? >> correct. ring once on this phone and stops. >> which is going to make aaron foss one popular guy. >> first started answering 1,000 calls an hour. now answering 39,000 calls an hour. >> nomorobo answers 39,000 calls an hour. >> yeah, it's crazy. it's unbelievable. >> so what does protection from robocalls cost? well the major carriers and fcc are currently hashing that out. aaron foss' nomo robo costs nothing to install. and the nomo robo a.m. goes for $5 a month. >> sound like a bargain. thanks, jim. >> when we come back, pitch perfect. ♪ hurricane earl is pouring heavy rain on the coast of honduras. expected to hit belize tonight as a category i before heading to mexico. earl is no threat to the united states. >> baseball fans in baltimore witnessed a remarkable athletic display. 9 year oelz zbrchlt-year-old 9-year-old, zion harvey. he lost his hand and feet to an infection at age 2. last year he became the youngest recipient of double hand transplant. after the surgery he told us he had a message for other kids who face challenges. >> i just want to say this -- never give up on your dream. it will come true. >> zion harvey, a role model at 9 years old. >> coming up next -- the leaning tower of san francisco. ♪ ,,,,,,,,,,,,,, ,$8drw we end to night with a million dollar listing. luxury apartment building in san francisco is listing towards the pacific and sinking quickly. here is carter evans. >> reporter: the views from the millennium tower were well worth the $2.1 million pat and jerry dobson paid for their two bedroom apartment they say until they learned their 58-story building is cracking and sinking. >> at this point the building has sunk 16 inches. >> reporter: also leaning. how far? >> it's leaning 15 inches out toward the west from here. >> reporter: the 7-year-old millennium tower home to sports celebrities like joe montana and hunter pence, a symbol of the run away real estate mark earth in san francisco, rated one of the top residential buildings in the world. >> the problem is i guess, the building is not tied into bed rock. >> reporter: ray sullivan a geologist with san francisco state university. he lead tours of the city's sinking and leaning buildings. when it comes to the millennium tower. >> i would be concerned if it accelerates and the tilting continues. >> reporter: it turns out san francisco's leaning tower has a lot in common with the world's most famous leaning tower of pis acht. where engineers used a counterbalance to help straighten it. millennium hasn't discussed plans for a fix. in a statement, millennium partners says the building was designed and constructed to high standards established by the city and county of san francisco for this type of structure. the company blames a new transit center across the street for destablizing the luxury tower. >> there is a lot of finger pointing going on right now. the one fact remains if they had drilled piellings down to bedro would we be here? >> no. that's the heart of the problem. >> reporter: and the solution is still on shaky ground. carter evans, cbs news, san francisco. >> that's the "cbs overnight news" for this thursday. for some of you the noouz continues. for others check back with us a little later for the morning news and cbs this morning from the broadcast center in new york city. i'm charlie rose. ♪ ♪ >> announcer: this is the "cbs overnight news." welcome to the "cbs overnight news". donald trump is pointing fingers at hillary clinton over a $400 million payment the u.s. made to iran as the landmark nuclear deal was taking effect. the transfer came in january the same day iran released five jailed americans. the white house insists the payment was part of a case over seized iranian assets. donald trump calls it ransom, originally cooked up when clinton was secretary of state. >> was this money ransom for the folks released? >> no, it was not. it is against the policy of the united states to pay ransom for hostages. >> just a coincidence? >> margaret brennan has the story. >> reporter: the obama administration long said a nearly $2 billion settlement with iran was unrelated to the prisoner release though they happened at the same time and also coincided with implementation of the landmark deal to freeze iran's nuclear program. when iran released four american prisoners in january, including journalist, jason rezain, and a former marine it was heralded as a diplomatic breakthrough. a coalition of congressmen met three of the americans in germany at the regional medical center. >> we paid a price in a major way to bring them home. >> reporter: the administration strongly denied paying any ransom. but according to new details first reported by "the wall street journal," $400 million in cash was flown into tehran on a cargo plane, around the same time that the americans were handed over. it was loaded with euros, swiss franks and currencies since any transaction with iran in dollars is illegal under u.s. law. senior u.s. officials claim the timing was coincidental. and just the first payment of a separate $1.7 billion settlement. at the time, president obama did not provide detail, but did say the money was meant to settle an outstanding legal dispute from before the 1979 islamic revolution. >> nuclear deal done, prisoners released, the time was right to resolve this dispute as well. >> reporter: the administration never consulted congress according to republican congressman ed royce who accused the white house of paying ransom to a state sponsor of terrorism. as details became public tuesday, there were instant reverberations on the campaign trail. republican vice presidential nominee mike pence. >> the administration air lifted $400 million in cash to iran. you know, we cannot have four more years accommodating and apologizing to our enemies or abandoning our friends. >> reporter: the olympic flame arrived in rio de janiero for friday's opening ceremonies of the 2016 summer games. security is tight. with soldiers and heavily armed police posted throughout the city. officials unveiled an operation center where agencies from 55 nations will monitor any terror threats. that's just part of the massive expense of the games. ben tracy has more on that from lympic park. >> reporter: hosting the olympics is typically a pretty great advertisement for the host city. but a recent poll found that 63% of brazilians think hosting the games here is actually doing more harm than good. >> rio de janiero. >> reporter: when rio won the right to host the olympics in 2009, a throng of brazilians were bouncing on the beach. it was their chance to show the world that brazil had arrived. but then, the worst recession in 25 years hit. and unemployment shot up alongside billions of dollars worth of olympic venues. >> it's beautiful. this is home. >> reporter: felipe piva lives in one of rio's poor neighborhoods known as favelas. all this money spent on olympics is anything getting better for you or people that live in the favelas. >> no. the investment. >> the cost estimate is $12 billion. experts say it could top $20 billion. at the same time, rio has cut spending on health care and education. the police have gone unpaid for weeks at a time. and 20% of the population here lives in favelas. >> hosting the olympics is just a terrible idea. >> reporter: andrew rose is an economist at uc berkeley. he says nearly every olympics is grossly over budget and leaves the host city with billions in debt. >> if this is such a terrible deal for these cities, why do so many cities seem to want to do this. >> most of the time the people who are in charge of bidding and getting the olympics are not around when the bill comes to pay for them. the olympics entails building a large number of facilities that are essentially never used again. >> reporter: the list is legendary. empty and rotting olympic facilities span the globe. the only thing swimming in the aquatic center in athens are frogs. beijing's rogue and kayaking course is bone dry. its famed birds nest stadium used most often as a nearly half billion dollar track for tourists on segues. the sochi winter games were russia's show of force. an estimated $55 billion made it the most expensive games ever. and made cost a big concern for future hosts. 11 cities bid on the 2004 summer olympics. but just five offered to host the 2020 games. only two cities wanted the 2022 winter olympics. almaty kazakhstan, and beijing. both with major human rights issues. beijing got the games. the international olympic committee has reformed the bid process encouraging more reuse and renovation of facilities versus insisting on brand new stadiums. rio is touting so-called legacy projects. including a nearly $3 billion subway extension and modernized airpo airport. but promises to clean up rio's notoriously polluted water never happened. in a city that is already broke, many worry the shiny new olympic park will go dark after being used for just 17 days. pest control giant terminix agreed to pay nearly $90 million to a family sickened by pesticides. steve esmond became paralyzed after checking into a condo in the u.s. virgin island. >> reporter: the esmonds nightmare started last march when the family of four was exposed to toxic pesticides in the villa. the pesticide was methyl bromide, an odorless chemical banned for residential use in 1984. terminix was fumigating the property below the esmonds, vacationing on the island of st. john. 16 months later, steven esmond is paralyzed unable to speak, battling tremors. his wife theresa, who suffered seizures improved and looking after their two stosons who can move. >> highly acutely toxic. at low levels it has chronic effects. >> jay feld mand, director of beyond pesticides. >> just because epa slapped a label on a product and told the pest control industry, you shall not use this in residences. doesn't mean that the law will be followed. >> reporter: court documents show terminix knowingly used methyl bromide. and admitted to spraying the banned pesticide at total of 14 locations including residential villas in saint croix and thomas. under the terms of the $87 on this cushion for generations. alright kiddos! everybody off the backpack, we made it to the ottoman. i like to watch them clean, but they'll never get me on the mattress! finally there's a disinfectant mist designed for sofas, mattresses and more. introducing new lysol max cover. its innovative cap has a 2x wider spray that kills 99.9% of bacteria. max cover is another great way to lysol that. when natural disasters strike in the world americans are quick to send aid. but a lot of times all that stuff donated by good samaritans just gets in the way of relief efforts. scott simon of npr has that story. >> reporter: when nature grows savage and angry, americans get generous and kind. that's admirable, it might also be a problem. >> generally, after a disaster, people with loving intentions donate things that cannot be used in a disaster response. and in fact may actually be harmful. and they have no idea that they're doing it. >> reporter: director of the center for international disaster information in washington, d.c. she spent more than a decade trying to tell well-meaning people to think before they give. hurricane mitch, honduras, 1998. more than 11,000 people died. more than a million and a half were left homeless. and juanita rilling got a wake-up call. >> got a call from one of our logistics experts said a plane full of supplies could not land because there was clothing on the runway. in boxes and bales, takes up yards of space it can't be moved. well, whose clothing is it, what is it? well i dent know whose it is. there is a high-heeled shoe, one, and bale of winter coats. i thought winter coats it is summer in honduras. >> reporter: humanitarian workers call the crush of useless, often incomprehensible contributions the second disaster. >> reporter: the indian ocean tsunami, 2004, a beach in indonesia, piled with used clothing. there is no time for disaster workers to sort and clean old clothes, so the contributions just sit and rot. >> so this -- very quickly went toxic. and had to be destroyed. local officials poured gasoline on it and set it on fire. and then it was out to sea. people have donated prom gowns and wigs and tiger costumes and pumpkins and frostbite cream to rwanda. >> reporter: you may not think sending bottled of water to devastated people seems crazy. but she points out. >> this water it is 100,000 liters will provide drinking water for 40,000 people for one day. this amount of water to send from the united states, say, to west africa, and people did this, cost about $300,000. but relief organizations, with portable water purification units can produce the same amount, 100,000 liters of water for about $300. >> reporter: then there were warm-hearted american women who wanted to send breast milk to nursing mothers in haiti after the 2010 earthquake. >> it sounds wonderful. in the midst of a crisis actually one of the most challenging things. rebecca gustafson, humanitarian aid expert worked on the ground after many disasters. >> breast milk doesn't stay fresh very long. the challenge is, what happens if you do give it to an infant who then gets sick? >> caller indicating thinks there is some one shooting in the building. >> reporter: december 2012, newtown, connecticut, a gunman killed 20 children and six adults at sandy hook elementary school. when did stuff start arriving? >> uh, almost instantaneously. >> reporter: chris kelsey worked for newtown at the time. they had to get a warehouse to hold all of the teddy bears. was there a need for teddy bears? >> i think it was a nice gesture. there was a need to do something for the kids. a need to make people feel better. i think the wave of stuff was overwhelming. >> reporter: how many teddy bears? >> i think 67,000. >> reporter: 67,000 teddy bears. >> all thousands of boxes of school supplies. thousands of boxes of toys, bicycles, sleds, clothes. >> reporter: newtown had been struck by a mass murder, not a tsunami. >> i think a lot of the stuff into the warehouse was more for the people who sent it than it was for the people who in newtown. at least that's the way it felt at the end. >> reporter: every child in newtown got a few bears. the rest had to be sent away, along with the bikes and blankets. there are times when giving things works. as many as 50 million people along the east coast are in the path of this hurricane. more than 650,000 homes were destroyed or damaged in hurricane sandy in 2012. thousands of people lost everything. >> we were able to respond in a way that the big bureaucratic agencies can't. >> reporter: tammy shapiro is one of the organizers of occupy sandy grew out of the occupy wall street movement. when the hurricane struck they had a network of activists connected and waiting. >> very quickly, we just stopped taking clothes. >> a relief supply registry, using a wedding registry. >> we put the items we needed donated on that registry. and then, people who wanted to donate could buy the items that were needed. a lot of what we had on the wedding registry was diapers. they needed -- flash lights. >> reporter: how transportable is your experience here following hurricane sandy? >> for me the network is key. who has the knowledge? where are spaces that goods can live if there is a disaster? who is really well connected on their blocks. >> this was taken in port-au-prince in haiti. >> the album of disaster images shows shot after shot of good intentions, just spoiling in warehouses. or rotting on the landscape. this is heartbreaking. >> it is heartbreaking. it is heartbreaking for the donor. it is heartbreaking for the relief organizations. and heartbreaking for survivors. this is why cash donations are so much more effective. they buy what people need when they need it. and cash donations enable relief organizations to purchase supplies locally which ensures they're fresh and familiar to survivors, purchased in just the right quantities and delivered quickly. and those local purchases support the local merchants which strengthens the local economy for the long run. >> reporter: disaster response worker, rebecca gustafson. >> most people want to donate something that is theirs. and money some times doesn't feel personal enough for people. they don't feel like enough of their heart and soul is in that donation. that check that they would send. the rea oh, dishwasher, why don't you dry my dishes? oh, he doesn't know any better. you just need to add finish® jet-dry in the rinse aid compartment. it's there for a reason. it dries much better than detergent alone. sorry dishwasher. finish® jet-dry. for drier, shinier dishes. national park service marking its 100th year. most parks are packed all summer long, but john blackstone visited one of the least visited gems in the park system. isle royale in the middle of lake superior. >> isle royale national park is so remote the only way in is by sea plane or boat. there are no grands in this tranquil setting, no grand tetons or grand canyon. what there is, an unparalleled, unplugged peacefulness. no internet. no cell phones. and few people. on average, isle royale national park gets 17,000 visitors a year. that's less than yellowstone seesen a day. forgive me, superintendent, in the national park system, it's t one of the biggest names. phyllis green, the park's superintendent is proud that many who come here once, yearn to return. so this is one of the place you came as a child? >> yeah, used to make a family trip down here. take a chance to go up into the lighthouse. and look out over the surrounding area. >> reporter: growing up, suzanae ausmus spent summers here. her dad was a ranger. later returned and met her husband mike also a ranger. do i understand that your first date he didn't take you to see a movie took you to see a moose. >> yep, followed him down the trail. there was this cow moose. she had her ears back, she was mad. mike looked at me, suzanna, you got to run. now, they're raising their 4-year-old son jasper here. >> we are disconnected from the rest of societien a lot of ways. it is one of the places that people just get in their blood. and they feel a deep connection to this place. you just adjust your straps. >> they feel this connection they're preparing to return to isle royale, this time with the kids. last summer they visited one of the big name national parks. so last year, you want to the rocky mountain national park. and you are saying, what we really want to go is back to isle royale. really? >> yes, just solitude. the quietness. that's the draw. >> reporter: three years ago the couple went backpacking on the island with friend to celebrate their tenth anniversary. >> it's addictive, phenomenal, you just crave having more of it. >> ooh, good pickings. >> reporter: from wild bears, wildlife, when they spotted a moose their adventure seemed complete. >> that was awesome. that is the first wild moose i have ever seen. >> reporter: but they didn't see one of isle royale's inhabitants. wolves, a vital part of the eco system are disappearing. biologist, john vucatec, says wolves used to reach the island crossing an ice bridge. now the lake water is warmer and ice is rare. as the wolves die off, he warns the moose population is exploding. >> the moose population is like a freight train. once it gets going, it doesn't stop very easily. >> reporter: moose feed on trees, he warns they threaten the forest. >> it is very clear the right thing to do is restore wolf and as promptly as possible. >> reporter: why not bring in more wolves? >> the question is when and where can the park service save species and for what purposes as climate change really rolls out nationally? >> reporter: isle royale has gone through changes before. in the 1800s, fishing families made the island their home. pulling white fish and frout from lake superior to be sold in cities as far away as chicago. >> they would bring the fish on in. they could keep them cold. out over the water. >> reporter: visitors willing to dive can also see reminders of the past under the water. dozens of shipwrecks ring the park. century old victims of isle royale's shoals and fog. >> descending in the dark, you come across this link to the past. it's a very surreal magical type of environment. >> the average visit to most national parks is 3 to 4 hours. at isle royale, three to four days. but that isolation is not for everybody. >> we have had some employees come out and not last 24 hours the we have had some visitors not last 24 hours. >> reporter: among the treasures of the national park system, isle royale remains a largely hidden treasure. >> the fast track of life goes away. >> it kind of seeps into your soul. just a special, special place. just a special, special place. >> reporter: a place of,,,,,,,,, the parngts of yelchin are suing chrysler-fiat. the parents blame the car maker for a poorly designed shifter. kris van cleave reports that story. >> reporter: this is the problematic shifter and lacks traditional grooves that tell you in park, drive, reverse. that's leading to people thinking the car is in park when it is in reverse, getting out the car can roll back. in the yelchin case, his family says they can't find the first recall notice and the second one saying a fix was available arrived seven days after his death. >> he loved life, very, very much. >> reporter: through tears their heartbreak was clear. the parents of "star trek" actor anton yelchin broke their silence, six weeks after their only child's death to announce a lawsuit against fiat-chrysler. >> it is wrong against, nature, when the child bury its own child. >> reporter: yelchin died when his 2015 jeep cherokee apparently rolled backwards winning the 27-year-old at a fence in his los angeles area home. the jeep among 1.1 vehicles worldwide recalled in april with an issue with the suv electronic shifter that can result in unintended roll away incidents. >> yeah, he was very special. but now he is very special because -- because he is going to save some other lives. >> reporter: government regulators report nearly 700 complaints claiming at least 68 injuries and 266 accidents linked to the shifter. investigators called the design not intuitive, increasing the potential for unintended gear selectionai problem we first reported in march ahead of the recall. fiat-chrysler began getting negative consumer feedback about the shifter shortly after subject vehicles entered the market as far back as 2012. it is no longer offered in new cars. the yelchin family is their biggest nightmare because they're not motivated by money. they can't be bought off. they want them punished and they want it changed in the way they do business. and -- we intend to go after them. >> reporter: in a statement to cbs this morning, fiat-chrysler extends its sympathies to the yelchin family for their tragic loss. the company has not been served with a lawsuit and cannot comment further at this time. fiat chrysler issued a safety recall. the company is encouraging people to make sure they have put the car into park and set the parking brake before getting out. >> that's the "cbs overnight news" for this thursday. for some of you the news continue thousands. for others check back later for the morning news and "cbs this morning." from the broadcast center in new from the broadcast center in new york city, i'm captioning funded by cbs it's thursday, august 4th, 2016. this is the "cbs morning news." the campaign is doing really well. it's never been so well united. >> donald trump paints a picture of party unity, despite a republican revolt. the fallout from his fight with a gold star family continues this morning as more republicans withdraw their support of donald trump. fit to be tied. hillary clinton takes on trump's business practices while touring a neck tie manufacturer in colorado. >> if he wants to make america great again, he should start by

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