perfume. today inside the zika zone, miami police handed out free repellant to homeless people. ardente is spending less time outdoors awaiting the outcome of her zika test. >> how long will it take? >> seven to ten days. >> little too long? >> would love to know tomorrow. >> reporter: the rain has come, mosquitoes have gone for now. charlie starting tomorrow morning in miami-dade county they'll begin aerial spraying against mosquitoes. in a ten square mile area right around the so-called zika zone. >> thank you, david. >> dr. jon lapook has been covering the zika story from the start. jon, there is a new case of infection in miami-dade.

but not in the community where the other infections were discovered what does that mean? >> well a nontravel related case. the question is isolated case or represent ape new cluster. we know there is a hot spot of zika infection. what they have to do is what they did before. go door to door, and figure out are there people who were infected with zika who don't realize it. if there are, then they are going to have how to go in there and do exactly what they did before. they're going to have to get rid of the freestanding water. use insecticide, outside and inside the house. and also put down larvacide, once the mosquitoes are killed, larvae can hatch. you kill those too. >> the question remains, what about the $1.9 billion the president requested but congress has not authorized? >> my colleagues in health profession are besides themselves abut this. imagine a place like florida, relatively well funded. has experience taking care of mosquitoes. what happens if there is an

infection in the gulf coast, small town that doesn't have the resources that miami has the. they may not pick up the fact that there is an infection. and itch there is an infection. then will they have the resources to really be able to go after it, go after the local population, and get it all under control. we are talking about a mosquito-borne illness that causes birth defects. for some reason, congress can't get it together to allocate funding. >> money that could make a difference. thank you, jon. >> thanks. >> if you have questions -- we have a lot of information on our website, go to cbsnews.com/zika. zika is a major concern in brazil where summer olympics begin friday. security another. isis called for attacks during the games. brazil's government its now working closely with the u.s. to bolster preparations. ben tracy is in rio. [ gunfire ] >> reporter: a shootout on a rio subway and olympic tourists running for their lives. just a training exercise.

but the security concerns are real. at rio's main airport where athletes and spectators are now arriving, soldiers with automatic weapons are standing guard. last month, brazilian authorities with help from the fbi arrested 12 people suspected of plotting isis-inspired attack,000s on the games. >> now we have this sort of security crisis right before the olympics. robert mugga, security expert based in rio. he says brazil's massive recession could impact the ability to fight trim and crime. >> $550 million shaved off the public security budget 2016 at the moment when we need to really amp up security. >> reporter: already this summer, shootouts have shut down major city streets. gunmen stormed a hospital to free a suspected drug trafficker and killed a patient. we went on patrol with rio's police in one of the neighborhood they worked to regain control from drug traffickers. do you thing the people coming here for the olympics have

anything to worry about? this commander says more tourists could lead to more street crime such as brazen thefts caught on video. 47,000 police officers and 38,000 soldiers are now on duty in rio. that's double the security force of the 2012 london olympics. and rio opened the new joint security operation center today. >> in fact, there are 55 different law enforcement agencies and intelligence agencies set up shop in rio to work with federal police and military police and intelligence services here. julianna dougherty brought her family to see the olympics. are you worried being here with your family? >> i am not. no. i think it's dangerous anywhere. and honestly, i think rio is going to do just fine. >> reporter: there are new concerns about security here at the main olympic park.

just this past friday, brazil fired the firm they hired to do the security screening. and charlie, now the federal and state police will take over the jobs. just days before the games begin. >> thanks, ben. coming up next, a multimillion dollar family settlement for a family poisoned by pesticide during a caribbean i love you so much. that's why i bought six of you... for when you stretch out. i want you to stay this bright blue forever... that's why you will stay in this drawer... forever. i can't live without you. and that's why i will never, ever wash you. protect your clothes from the damage of the wash with downy fabric conditioner. it not only softens and freshens... it helps protect clothes... from stretching, fading and fuzz... so your favorite clothes stay your favorite clothes. downy fabric conditioner wash in the wow.

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the parent company of terminix agreed to pay $87 million to a delaware family poisoned by a banned pesticide last year during a caribbean vacation. vich the family may suffer lifelong effects. >> the esmond's nightmare began when they exposed to pesticide. methyl bromide was banned in 1984. terminix was fume gating the

property below, at the sirenusa villa near st. john. 16 months later he is paralyzed, his wife theresa suffered seizures improved looking after their two sons who can barely move. >> highly acutely toxic. at very low levels it has chronic effects. jay feldman executive director of beyond pesticides. >> the bottom line here is 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. we need much more control over how these chemicals are allowed into the environment. court documents show terminix used methyl bromide on the st. john property twice and admitted to spraying the banned pesticide at 14 locations including residential villas in saint croix and saint thomas.

under the terms of the 87 million dollar settlement they will also pay $10 million in criminal fines. terminix refused to comment despite repeated requests. department of justice is conducting a criminal investigation. charlie, a hearing expected in august. >> thank you. >> then there is this. dentist recommended we floss daily. but does it work? that story is coming up.

to date parents of actor anton yelchin grew emotional.

their 27-year-old son was crushed in his driveway in june when his jeep grand cherokee rolled backward and pinned him against a fence. that model has been recalled because its gearshifter was confusing to drivers. some thought it was in park when it was in neutral. yelchin appeared in several star trek movies. head of the nation's largest police force said he is stepping down next month. william bratton is leaving new york city police department to gin a consulting firm. he has twice led the nypd. bratton gets credit for keeping crime down but leaves at a time of tension between police and minority communities. >> this came as a surprise today. the federal government has quietly dropped its long standing recommendation that we floss daily for good dental health. the government acknowledged there is no evidence that flossing prevents gum disease and cavities. there is more news ahead. >> i'm vladamir duthiers, coming

up next on "cbs overnight news," the ferris wheel wars come full circle. ,,,,,, ,$8drw

finally tonight, what goes around is coming around to cities all over the world. here is vladamir duthier with the competition to build the better ferris wheel. >> reporter: the view atop chicago's centennial wheel its hard to beat. with lake michigan's blue canvas as the backdrop, nearly 1 million take a spin each year. brian murphy is chief operating officer for navy pier which runs the wheel. >> now just part of the chicago skyline. if you don't see the wheel something is wrong. >> reporter: stand 196 feet high. but this isn't the city's first. >> you know with chicago we had

the original wheel here. first ferris wheel ever was here in chicago. >> yes at the world's fair. >> reporter: george ferris built his wheel to rival the eiffel tower. others hoping to attract tourist dollars have been trying to outdo him ever since. the london eye stand 443 feet. the high roller in las vegas, 10 feet higher than that. what do you make of that? >> seems to be a war. everybody, a wheel war out there. >> reporter: a wheel war. if so, this is the next battlefield. new york city's staten island. where the world's largest wheel is currently being built. the new york wheel at 630 feet tall will be double the size of the statue of liberty and open next year. >> the drawing, make the structures have shapes. rich marion is ceo of the project. >> to us it is not about being the biggest. it is about having a grandness of scale. more importantly in some ways, a grandness of place. >> but with dubai building a

nearly 700 foot wheel. new york won't hold the title of world's largest for long. leaves chicago with something none of them can duplicate. >> in fact there is one number one. we are the first. nobody will ever take that away from us. >> reporter: because some times, history does come full circle. vladamir duthier, cbs news, chicago. >> that's the "cbs overnight news" for this wednesday. for some of you the news continues. for others check back with us later for the morning news and "cbs this morning." from the broadcast center in new york city, i'm charlie rose.

welcome to the "cbs overnight news," i'm jericka duncan. president obama hosted a state dinner for prime minister of singapore last night. but the white house visit was overshadowed by the political firestorm over donald trump's criticism of a gold star family. the muslim parents of a u.s. army captain, killed in iraq, drew the wrath of trump. after they spoke at the democratic national convention. margaret brennan asked the president about the controversy during a news conference with the prime minister of singapore. >> given the republican nominee's recent comments about the khan family and his statement that if president he would consider recognizing russia's annexation of crimea

does it make you question his fitness to be president? >> yes. i think the republican nominee is unfit to serve as president. i said so last week. and he keeps on proving it. the notion that he would attack a gold star family that had made such extraordinary sacrifices on behalf of our country. the fact that he -- he doesn't appear to have basic knowledge around critical issues in europe, in the middle east, in asia, means that he is woefully unprepared to do this job. and this is not just my opinion,

i think what's been interesting is the repeated denunciations of his statements by leading republicans. including the speaker of the house, and the senate majority leader, and prominent republicans like john mccain, and the question i think that they have to ask themselves is if you are repeatedly having to say in very strong terms that what he has the said is unacceptable, why are you still endorsing him? >> major garrett has more. >> reporter: plenty of donald trump supporters believe the controversy with the khan family is a media obsession if not media invention. list of critics of trump is extensive, members of congress

some of whom spoke at his own convention and veterans of foreign wars where trump spoke last week. in addition to this mess, trump raised eyebrows further yesterday by calling hillary clinton the devil, and suggesting november's election well it just might be fixed. >> horrible things were said about me. i think it was frankly very tough. all i did is respond i will always respond. >> reporter: donald trump did not apologize to the parents of humayan khan. instead, he offered a hypothetical world without the war that killed him. >> if i were president, his son wouldn't have died. i wouldn't have been in the war. trump pointed to calls to crack down on immigration as the the possible reason for the criticism. >> when you have radical islamic terrorists, probably all over the place, we are allowing them to come in by the thousand and thousand. i think that's what bothered mr. khan. >> the head of veterans of

foreign wars said the vfw will not tolerate any one berating a gold star family member for exercising right of speech or expression. >> donald trump will restore law and order. trump's runningmate, indiana governor mike pence was asked to defend the comments by the mother of an air force officer. >> his disrespect for mr. khan is an example of that. first pence had to quiet the boos from supporters. >> captain khan is an american hero, we honor him and his family as we do all gold star families. in ohio monday afternoon without provocation or context, trump suggested november's election may not be above board. >> i'm afraid the election is going to be rigged, have to be honest. later in pennsylvania send this about bernie sanders and his endorsement of hillary clinton. >> she is the devil. he made a deal with the devil. >> he seems to be going out of

his way to offend different groups. >> frequent trump critic, arizona republican senator jeff flake said trump's routine works for the converted but falls short everywhere else. >> there have been enough statements that are just so outlandish that in the end, he simply can't win a general election. >> trump invited more criticism when he said this about former fox news chairman and ceo roger ailes. in an interview with "usa today," trump said he would look to think daughter ivanka would find another career or company if subject to sexual harassment. many have said, the proper answer is to use the law and human resources method to improve the work place. >> a small neighborhood in north miami is now ground zero in the battle against the zika virus. mosquitoes are spreading the virus through the wynwood section and health officials warning pregnant women to avoid the area. david begnaud there. >> reporter: welcome to wynwood

walls, a tourist spot in artsy south florida, the epicenter of local zika spread. what's working is awareness campaign telling people it is here being transmitted locally. what is not working as well as the federal officials hoped it would are the chemicals being used to try to kill the mosquito that carries the zika virus. with more than a dozen cases, this small miami neighborhood of wynwood is home to the largest ongoing zika transmission in the continental u.s. health officials are struggling to control the mosquito, the bug which carries the virus. >> they have been applying both chemicals to kill larva mosquitoes and adult mosquitoes every day. it isn't works as well as we hoped. that could be because some mosquitoes are resistant. dr. tom friedan, director of disease control and prevention says the mosquito travels 164 yards in its lifetime but moves

quickly. >> been referred to as the cockroach of mosquitoes. lives indoors, outdoors. it can breed, hatch in a few drops of water. the eggs can last for months. and it can bite four, five people at once. so it spread the disease rapidly. >> reporter: in two weeks, 14 zika cases have been identified as locally transmitted. in two south florida counties. 12 of those infections are with men. the virus its most dangerous though with pregnant women. according to the cdc, women who have symptoms should wait at least two months before trying to get pregnant. infected men should wait at least sex months before trying to have a child. this doctor says he is ramping up testing for all pregnant women in his miami clinic. >> your clinic is zika zone. >> we started to make sure all pregnant women, symptomatic or asymptomatic will get tested.

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the torch will be lit at the summer games in rio. one of the athletes representing the united states will complete wearing a tra dpiditional islam hajab. she is a muslim woman, african-american and fencer. after failing to make the 2012 olympic team she is back with a clear objective that goes beyond her desire to win gold. >> it is rewarding to feel powerful. >> reporter: a lunge. a saber flick. a counter. fencing is as elegant as fierce. and fast. after two decade of fitness training, sparring and lots of

lunging, 2016 is the year for fence r mohammad. >> the self described jersey girl and three-time all american at duke university is going to her first olympic games. >> i just feel very blessed to have qualified for the team. and it is just, i am so excited the i am like when is the excitement going to wear off. >> reporter: she will experience a first in rio becoming the first american to compete in the olympics wearing a hijab. >> i feel like my hijab is liberating. it is a part of who i am. and i believe that it allows people to see me for my voice. and not necessarily how i look. i hope that it will change a lot of the misconceptions that people have about muslim women specifically. >> reporter: mohammad chose fencing as a kid because unlike

other sports it allowed her to honor muslim faith and blend in. >> it was the first time where i truly felt a part of the team. first time i was in uniform with everyone else. i didn't have to adjust it in any way by like adding length to the sleeves or wearing, you know, pants when everyone had on shorts. >> i started working with herren my garage. >> reporter: mohammad's first coach knew she had the aggressive analytical approach. >> you knew she would be a champion? >> i knew she would be a champion. not a whole lot of children walk in here and hatch the look, to be able to look through the oemt and say you are not even there. because you know what i am focused on the gold medal, you happen to be between me and it. >> reporter: mohammad ran us through basing of saber fencing. the stance. >> this is fencing, on guard. >> the movement. >> slashing movements. >> the attack. >> push off your back leg. one, two.

nice. >> reporter: the strategy. >> i compare it to chess. >> reporter: oh, strategy. >> there is strategy. you want to be a step ahead of your opponent. >> reporter: mohammad says she owes it to her community to use her platform as the an olympic athlete to speak out against hate. >> we are in this time where people are very comfortable, you know speaking out against muslims. i had a man enkont encounter me street told me i look suspicious. i looked like i was going to blow something up. he followed me to my train. i felt so unsafe. i was afraid. here i am, a u.s. olympian, and that's my reality. >> muslim-americans enrich our lives today. in every way. >> reporter: a reality president obama acknowledged earlier this year at a baltimore mosque. >> when team usa marches into the next olympics one of the americans waving the red, white and blue will be a fencing champion wearing her hijab, she

is here today. stand up. come on, let me -- [ applause ] >> there you go. >> reporter: even though mohammad was named one of "time" magazine any 100 most influential people. when she puts on the helmet in rio she will be just another american athlete focused on winning the gold. >> i tell people all the time that i am just, you know, a girl from jersey who had a dream. was willing to work hard for it. >> reporter: mow haehammad is co-owner with siblings of a fashionable clothing line inspired by her mother and grandmother. women who want to dress modestly

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millions of americans grew up with bill nye the science guy teaching them about the wonders of our world. well now the science guy has got another calling, teaching adults about the dangers of climate change. rita braver paid him a visit. >> reporter: on a quiet, residential street in water-starved los angeles sits nye labs. >> we have a drought. we call this xeroscape, greek word for dry. the home of bill nye, the

science guy. i don't want to brag too much, probably a 20th of the water. >> reporter: here everything is a science project. from the composter to the solar panels to the vegetable garden. every boat eats kale, it its great. grows like crazy. want some? it's good. nothing better for you. the periodic table we used on television. the smithsonian wants this. >> reporter: an historic thing. >> if you are a science guy show fan. >> bill nye, the science guy. >> reporter: and there are many. in 1990s show, bill nye the science guy made him a star. >> wind all over the world its caused by heating and cooling of the earth. >> reporter: all in the service of teaching kids science. now that's a chemical reaction.

we are going to run some electrons through it. >> reporter: the show ended in 1998 the. >> all right. >> i love you, man. >> reporter: but 60-year-old's nye's work as a bow-tied science educator has not. >> if we were to find evidence of life on mars, it would change the world. >> reporter: only now his focus is on adults. >> we don't agree on the facts. the science. researchers say, yes, you. >> not all the researchers. and globally -- >> not absolutely. >> i feel we real have a problem of anti-science now. if you have people who are voters and taxpayers, who don't believe in science, we're -- going to fall behind. as a society. >> reporter: hence his high profile debate a while back, defending the theory of evolution against attacks from creationists. who believe the universe was created in six days. >> i believe it is the

creationists that should be educating the kids out there. because we are teefi inteaching. >> mr. hamm how could there be billions of stars more distant than 6,000 years if the world is 6,000 years old? >> reporter: he is most passionate about the dangers of climate change. the subject of his latest book. >> climate change is real! let's keep in mind that there is something about which you should give a [ bleep ]. >> have you become politicalized? >> people look at me as a political figure. >> is that okay with you? >> what's the alternative. climate change is objectively an enormous problem. if you think it is because i am a progressive and you are conservative, you are putting it on me. i really work to be open minded. genetically modified food, cl s classing example. he did an about face on the food he once opposed.

i was really impressed with how thorough agricultural testing its. it is really amazing. amazing. it changed my mind. >> reporter: you have kind of alienated some people who have been supporters and fans in the past? >> i'm doing my best here people. i looked at the data. i changed my mind. what more do you need from me. that's science. >> reporter: so says the science gift. but it may surprise you to learn that he is actually william sanford nye, the mechanical engineer. a cornell graduate, rejected four times for the astronaut program. nye joined boeing in the 1980s working on the 747. then one day, he won a steve martin look-alike contest. >> my name is bill. am i moving too fast. my name is bill. which led to tv gigs doing his own brand of comedy. >> this looks like a job for --

speed walker. ♪ ♪ >> reporter: and somehow it all led -- >> what is a wetland any way? >> reporter: to bill nye the science guy. >> major wetland here, okay. >> a salt marsh. tide flat. i'm sort of sinking. >> reporter: almost 30 years later, the science guy is no act. >> technically, black holes are not -- not vessels of pure energy. >> reporter: nye's day job, ceo of the planetary society. a space enthusiast organization set to launch the first ever solar propelled spacecraft next year. but while nye dreams of outer space, it's his own dna that worries him. >> my family has an affliction called ataxia. my sister has the it real bad. >> reporter: what is the

symptom? >> you walk like you are drunk. my sister has a walker. apparently not a strength thing. has to do with your balance from your cerebellum. >> you didn't have symptoms of this? >> i do. two years ago i noticed it. >> reporter: as somebody who sees things from a scientific point of view is this scary for you? >> if you are not scared of this, i don't know what you are scared of. >> reporter: but one thing he thinks can stave it off is exercise which is why you will often find bill nye at this elk's club. swing dancing the night away. ♪ ♪ >> i have to say that the last place most people think bill nye the science guy would be is on a dance floor in an elk's club. >> it's a blast. >> what do you love about it? what brings you out here? >> the music. i like the music. the joy of movement. you are, move your body.

it feels great. and then you got to hold the woman. which is, priceless. >> reporter: you are single. you have a significant other these days? >> maybe. >> i just wanted to ask you if you think the human species gets lonely? >> oh, gosh. so, so, yes. i -- i -- i have had a lot of girlfriends. and looking back, it would have been better to have, get married and have kids. but i was doing this other thing. >> that's really nice. that's the japanese silk. >> reporter: this other thing, bill nye says is summed up in a single line he wrote for the staffers of his old show. and you see the objective in 1993. >> >> changehe world. heck, yes. if you don't think you can, then

if you don't think you can, then what are you doing here?,,,,,,,,

a full sized replica of noah's arc is drawing criticism for teaching the bible as history. mark strassmann has the story. >> reporter: this is the ark encounter, a chapter from genesis told on a $100 million budget. four floors of noah, his family and beasts, great and small. in this rendition, they sail first-class through the watery chaos outside. and seeing it is a privilege and a pilgrimage to the demarcos family. first impressions? >> breathtaking. amazing. detail. outside. we walked up, just jaw dropping. >> reporter: this timber framed ark was built with help from 100

amish craftsmen following specs from genesis. it runs 510 feet long. almost two football fields. something to kid, this ark's christian backers kid them young earth creationists, evolution, junk science. the earth is only 6,000 years old. do you believe there were dinosaurs and people at the same time? >> absolutely. yep, absolutely do. they walked hand in hand. ken hamm, the ark's 64-year-old visionary lead a ministry, answers in genesis. >> the truth is word of god. we are faithfully, as faithfully as we can representing what god's word teaches. on this ark, hamm sees christians taking a stand. >> what do you say to critic whose say this is not the truth? this know it scientifically based this is promoting an ignorant view. >> people can say what they

want, ignorant, say they've dent believe it. i invite them to come here. >> reporter: critics come plan of discrimination in hiring. only christians. no geys, lesbians. single people have to sign a chastity pledge. the project received $18 inn in kentucky tax incentives which a federal court upheld. jim helton of tristate free thinkers think that tramples the line between church and state. >> it is a religious point of view that says science is false. gay people aricy. >> true believers should flock to the ark but shouldn't expect an olive branch from bill ney. >> it would be hilarious from people other parts of the world to come, are you kidding. some body killed this. use your head. decide if you think this is reasonable. >> that's the "cbs overnight news" for this wednesday. for some of you the news continues. for others check back with us a little 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 jericka duncan. captioning funded by cbs it's wednesday, august 3rd, 2016. this is the "cbs morning news." the republican whip grows between the parties leaders and its presidential nominee. donald trump refuses to endorse john mccain and paul ryan's re-election bids after they denounced his attack on a gold star family. now, president obama poses a question. >> why are you still endorsing him? meanwhile, military members are firing back at trump for this. >> a man came up to me and he handed me his