>> pelley: zika virus arrives in the u.s. now it's war on mosquitos as doctors warn pregnant women to protect themselves. >> this is not just a florida issue. this is a u.s. issue. it's a national issue. we're just at the front of it. >> pelley: also tonight, a strict voter i.d. law i state is struck down. clinton and kaine hit the road while trump threatens his critics. >> the little guy gets up, knock the hell-- i said i want to hit him back so hard. >> pelley: what happens to traffic deaths when cities remove red light cameras. plus steve hartman and his dad arrive at one of life's crossroads. >> i prefer to stay but you also

things come to an end. captioning sponsored by cbs this is the "cbs evening news" with scott pelley. >> pelley: a mosquito-borne epidemic spreading through the americas for months has arrived in the united states. today in florida, four zika virus infections from mosquito bites were confirmed. zika causes severe birth defects, and today health officials said americans should take precautions, particularly florida has now launched an extensive spraying program, and david begnaud starts our coverage. >> reporter: today, more than 10 teams of disease detectives were canvassing a touristy area known as winwood, just north of downtown miami, and now identified as the zika zone. the four patients -- three men and a woman-- were infected in early july, got sick the next

later. by interviewing the patients and their friends and family, travel and sex were ruled out as means of transmission. and state disease detectives honed in on one square mile-- wynwood-- as the area where they may have been infected. infectious disease doctor aileen marty was one of the team leaders asking people for voluntary urine samples today. >> the door-to-door urine request is what has aloud the state of florida to make determination that ongoing mosquito transmission is happening in this specific area. >> reporter: what led you to this area to start asking for those samples? >> because of where the symptomatic individuals had come from. >> reporter: one symptomatic person, you start door knocking and you find other cases. officials believe local transmission began this way-- the person became infected with zika abroad and then traveled to

when a local mosquito bites the person with zika virus and then bites someone else, the infection is transmitted. zika is particularly dangerous for pregnant women as the virus can cause severe birth can defects. dr. celeste phillip is florida's surgeon general. >> we understand that pregnant women will be very concerned, and that's why we have been working closely with the providers in that area to provide the zika prevention kits to make sure that know how to decrease their risk. >> reporter: as part of the investigation, county workers are killing, as well as collecting mosquitos that can be tested for zika. of all the mosquitos that have been tested so far, none have come back positive for zika. there are pregnant women living in this one-mile area, and tonight they're all being told to get tested. scott, those inspectors are going to be back out tomorrow door knocking because they want

>> pelley: david begnaud, thanks. dr. jon lapook has been covering zika for us from the initial epidemic in brazil. jon, tell me, what should people who live in florida be doing right now? >> reporter: well, the first thing, scott, is to try not to get bit by a mosquito. and that's things that you've been hearing about-- cover up, cover up by wearing long sleeves, long pants, go inside into air conditioning if you have it. make sure the screens are repaired. and use the insect but in addition what, communities can do is go door to door and make sure the free-standing water, things even in little capes of water can multiply-- that they get rid of that. and a community effort is really important, if there's an elderly person, we'll help them. and by doing that they can actually create not mosquito totally free zones, but making the likelihood of mosquitos really being present in large numbers is les. >> pelley: now, what about pregnant women? we know that zika is

>> reporter: i think it is very reasonable to take precautions now anywhere where the mosquito is present. you don't have to wait for a local case to try to do everything you can not to get bit by a mosquito. so they should cover up. they should be inside. they should use these e.p.a.-registered repellents, and that includes repellents that contain deet. and i really think people should go to the c.d.c. web site because they have a whole list of e.p.a.-registered repellents there and a lot of other great informn. our los angeles newsroom tonight. jorng thank you. congress left for the summer vacation without funding america's zika defense. the obama administration had asked for $1.9 billion. republicans put up $1.1 billion, but the g.o.p. wouldn't allow money for one particular women's health provider in puerto rico that has ties to planned parenthood. democrats couldn't live with that. now, as predicted, the virus has arrived.

vacation in september. in another important story tonight, north carolina's law requiring voters to show photo i.d. was thrown out by a federal court that said the law was designed to bar black americans from the polls. this is the third time this month that similar laws were struck down. the others in texas and wisconsin. here's jan crawford. >> reporter: the court called it the "most restrictive voting law north carolina has seen since the era saying the law's provisions, "target african american with almost surgical precision." attorney general loretta lynch was quick to hail the decision. >> as the court found, this law was passed with discriminatory intent. >> reporter: the legislature passed the law in 2013. north carolina had emerged as a key swing state, with registration and turnout rates for african americans in the state nearly equal toes those of

and the third gutted in the past 10 days. republicans like north representative david lewis say the laws are necessary to combat voter fraud. >> we just want to make sure that the people that go up to the polls to vote are in fact who they say they are. >> reporter: opponents like allison riggs say north carolina's efforts went far beyond those in other states. >> this, literally, was a monster bill. it attacked every avenue of participation, disproportionately used by voters of color. >> reporter: the law required voters to show certain photo i.d. that is white voters were more likely to possess and eliminated other voter-access tools like same-day registration and a full week of early voting that black voters relied on more heavily. for example, in 2012, 64% of african americans voted early, compared to 49% of whites. scaling back early voting

american churches provide transportation for voters. now, opponents say lifting these restrictions could increase turnout by hundreds of thousands of votes, and that could make a difference. in 2012, mitt romney beat president obama by 2%. and in 2008, scott, mr. obama beat joh john macane by a razorn .03%. >> pelley: jan crawford, thanks so much. one day after accepting thede kaine set off on a bus tour of industrial cities. nancy cordes is following the campaign. >> reporter: clinton and kaine left the warm embraifs their convention today and headed directly into g.o.p. territory. >> really neat. >> reporter: central and western pennsylvania. >> we're anything to be visiting a few place where's people are making things. i find it highly amusing that donald trump talks about make

he doesn't make a thing in america except bankruptcies. >> reporter: the economy was a major focus of clinton's address last night. >> we will have help more people learn a skill or practice a trade and make a good living doing it. we will give small businesses like my dad's a boost, make it easier to get credit. way too many dreams die in the parking lots of banks. >> reporter: she portrayed trump as provoked to lead. >> donald trump can't even handle the rough-and-tumble of a presidential campaign. a man you can bait with a tweet is not a man we can trust with nuclear weapons. ( cheers ) >> reporter: clinton acknowledged she has her own work to do. >> i get it that some people just don't know what to make of me. >> reporter: it helps that

up. >> if you want to know about trustworthiness and character of somebody in public life, look to see-- >> we trust hillary! ( cheers and applause ). >> all right he got to the punch line. he got to the punch line. >> reporter: there is a major update tonight on the investigation into hacked e-mails at the democratic national committee. the f.b.i. is now looking into whether a program used by the clinton campaign and the democratic congressional campaign committee was also was how intrusive this invasion was and whether it can also be tied to the russians. >> pelley: nancy cordes reporting for us. nancy, thank you. well, one of the most striking speeches at the democratic convention was delivered by khizr khan, a muslim immigrant from pakistan. his son was an american hero. humayan khan came to the u.s. as a young boy and later joined the army. he rose to the rank of captain.

12 years ago after ordering his men to stay back while he investigated a suspicious car. humayan khan was 27. from the podium, his father delivered a lecture to donald trump. >> crump you're asking americans to trust you with their future. let me ask you-- have you even constitution? ( cheers and applause ) i will-- i will gladly lend you-- my copy. ( cheers and applause ) >> pelley: well, as the democrats were showered with balloons at their convention, republican donald trump was unleashing a blizzard of criticism. major garrett reports that trump kept that going today.

giving a speech that was so average. what a sad situation. it wasn't wonderful, folks. >> reporter: in colorado springs, a conservative enclave in a swing state, donald trump picked up the crowd's chant. >> lock her up! >> you know what? i'm starting to agree with you. i'll tell you. i'm taking the gloves off, right, yes! no more mr. nice guy. >> reporter: one target of trump's ire, who endorsed clinton and called trump a dangerous demagogue. >> i'm a new yorker. and i know a con when i see one. be. >> reporter: trump struck back on twitter. , "little michael bloomberg who never had the guts to run for president knows nothing about me." and at a rally in iowa-- >> they had a guy get up, a little guy gets up, knocked the hell-- i said i want to hit him back so hard. i'm going to hit this guy.

you have no idea-- >> reporter: as we've all learned, it wouldn't be a day in politics without trump on twitter, and his response to clinton's acceptance speech, well, it covered a lot of ground. scott, trump accused clinton of being soft on syrian refugee migration, indifferent to border control with mexico, and negligent in the fight against isis. >> pelley: major garrett, thanks. coming up next on the cbs evening news air, new study

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>> motor vehicle crashes don't have to be killing and injuring so many people. >> reporter: adrian lund is president of the insurance institute for highway safety. >> when people know that there's a good chance of getting a ticket for running the light, they're more likely to be paying attention. >> reporter: but after the cameras were the target of complaints, including that their primary purpose was to raise revenue, more than 150 cities removed them. the insurance institute's latest been a mistake. it looked at 14 of those cities and found a 30% increase in the rate of fatal accidents at the intersections where the cameras once were. but there's still evidence the cameras don't always work properly. >> i was surprised, especially when the picture shows the car not moving. >> reporter: jessica aguilera's $490 red light ticket was thrown out because she did not violate the law. do you think it's possible that these cameras can save lives? >> anything's possible.

turned city councilman, initially supported red light cameras, but he says they weren't necessarily preventing reckless driving, so the city turned them off. >> the problem with this situation was inordinate number of people being cited for a right turn after a stop on the red light, not people blazing through it. >> reporter: now, some of the methods the insurance institute has used to study red light cameras have been widely criticized in the the past, and this that these cameras actually cause more accidents, scott, especially rear-end collisions. >> pelley: carter evans, thanks very much. coming up, pope francis at auschwitz. coming right back. lps support r and includes b vitamins to help convert food to energy. mmm, these are good! nice work phillips'. the tasty side of fiber, from phillips. ?

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million people, mostly jews, were murdered. at one point, the pontiff paused to pray for nearly 15 minutes. he met with survivors, and then in a darkened jail cell where a catholic priest was killed, he prayed again. bishop donald hying is from indiana. >> we still live in a world of tremendous violence and dehumanization, and auschwitz stands as a memorial of, you others. >> reporter: this is not the first time a propose has traveled here to auschwitz. pope john paul ii came, as did pope benedict. he made a memorable speech, questioning where god was amid so much evil. pope francis, however, decided to remain silent. at nearby birkenau, survivors gathered, including 90-year-old marian turski. do you wish the pope had said

>> reporter: the pope returned here to krakow where he spoke to crowds tonight saying the cruelty did not wend auschwitz. torture and persecution continue today. >> pelley: seth doane in seth, thank you. "on the road" with steve hartman coming up next. when people ask me what it's like to win an olympic medal, i tell them, "you already know." the medals you've earned are all around you. your bronze. your silver. your gold.

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journey, steve hartman's family has passed a milestone, "on the road." >> reporter: this is the story people ask me about more than any other, a story we first told last year about the house i grew up in and the man who made it. you recognize any of these? my father, george hartman, built this house himself back in 1955. >> i sure do. >> reporter: how long were you planning on living here? >> the rest of my life, but when we built this house, we consider stairs as a factor when you got old. >> reporter: and so, there we were. at that moment elderly parents and their grown children seem to dread equally-- the selling of the family home. >> i prefer to stay, but you also have to realize that all good things come to an end. >> reporter: after my mom died, it became increasingly difficult for him to mog his own, so my brother joe and i went to toledo, ohio, to pack up

>> reporter: what is that? >> my mother's hair when she died. she never got gray hair, as you can see. >> reporter: i would have taken your word for it. we spent a couple of days trying to help dad with his downsizing. >> i don't want to throw anything away like that. >> reporter: okay. which at times felt more like same sizing. shoe horn? >> yeah, i was looking for that. >> reporter: but when pressed the only things that truly mattered centered on either his face-- >> rosary. >> reporter: or his family. >> "i love you, dad, happy valentine's day." >> reporter: do you want to throw that away? >> no! >> reporter: a house that raised a family is so much more than wood and shingles. it's home to almost every memory of our younger lives. it's in the background of everything we were and helped make us who we are. it's where we learned to feel safe, sound, and sometimes even invincible. yes, technically, a house is

this, it sure feels more like a person. my dad moved from here to a senior living facility near my other brother, mike, in atlanta, where i recently visited. i get a lot of e-mails, people asking me how you're doing? >> you do? >> reporter: yeah. >> what do you call a lot of e-mails? >> reporter: hundreds. >> yeah? >> reporter: yeah! >> how come you don't ever send me that kind of stuff. >> reporter: as you can tell, he's still the same old dad. he got to mattered the most to him, and not a single stair in the place, which mattered most to us. and as for his fans, he told me he appreciates all of you who asked about him. >> tell them i'm still alive. >> reporter: okay. >> what are they going to say when i drop over dead? >> reporter: i don't know what they'll say, but i'm sure he'll want to read their e-mails. steve hartman "on the road,"" in atlanta. >> pelley: and that's the cbs

"the insider," tracking the biggest stories making news today. number one -- debra messing picks a twitter fight with gwen and blake. why celebrities and politics can be a combustible combination. >> a lot of people donik stick to your music. then -- jared leto's drug admission. did i defense dove pretty deep, you could say. >> as the "suicide squad" takes over new york, why is will smith fan-boying over ben affleck? >> he jumps out of the batmobile! and number three, team usa touches down in rio. >> we're off! we're breaking down the athletes' olympic style, that's