six provincial counties and counting. in some cases afghan forces are folding without a fight. we are told one taliban tactic is to persuade local elders to convince afghan soldiers to drop their weapons rather than face certain defeat and death, even giving them cash to get bark home. in the past u.s. ground forces have worked with afghan commandos to dislodge taliban fighters from city centers. this time the u.s. military has made clear america will not waiver from the pullout plan. >> these are their military forces, their provincial capitals, their people to defend. it is going to come down to the leadership they are willing to exude at this particular moment. >> reporter: in the absence of that afghan leadership, the white house and the world now have to decide on how much they're willing to tolerate from the taliban in terms of civilian casualties, in terms of threatening kabul before they're willing to intervenor decide to let the afghan government go it

alone. >> that was our charlie d'agata in london. closer to home, the covid is sweeping the nation. at the southern border there is concern the migrant crisis may be complicating the issue. city of mccallen texas says more than 7 th,000 migrants have crod over. miryea villareal has this from the emergency shelter in texas. >> reporter: the alduez bridge, if you look at the sky right behind me, you are going to see a makeshift processing site run by border patrol. so many people are crossing into the u.s. right now. they have no room to put them in actual buildings. with covid in mind, decision makers believe this, what you're looking at, is the best option they have. the enormity of the

country's immigration issues is on full display underneath this busy stretch of highway. the site run by customs and border protection measures well over the length of a football field with room to grow. once agents process these migrants, most will board buses and end up here. a local park turn into a temporary tent city run by the city of mccallen and catholic charities. but the first thing that happened straight off the bus is covid testing. catholic charities director sister norma says migrants testing positive for covid has been overwhelming. >> it got to a point where that space is not even available because there are so many of them. >> reporter: in the last three weeks mccallen has seen over 1800 migrants a day, prompting mayor javier lobos declare a state of emergency. >> it is overwhelming for our city. we don't deal with this, we don't deal with immigration. we shouldn't.

>> reporter: across the entire southwest border, 210,000 migrant apprehensions were reported for july, a 21-year high that's caught the attention of conservative leaders across the country. >> if you just want to hop scotch across that border, they don't care about covid. they're letting you straight in. >> reporter: a cbs news medical expert says the covid positive cases from across the border are relatively small, and it should be the latest surge across the u.s. to the delta variant, low vaccination rates, and rolled back restrictions. but local officials in texas are already growing concerned. >> last year i didn't see it as a problem because it was under control. i saw no correlation between the increase in covid within our community and the immigrants because they were isolated. >> reporter: but? >> now i think there is an issue because now they're going throughout. positive or nonpositive, they get picked up and going out, and we have no authority to stop it. >> reporter: so when you hear the governors talking about this

being a problem now for the health and safety of the rest of america, am i hearing right you agree with that? >> i totally agree with that. >> reporter: one city over, father roy snipes leads our -- of guadalupe. >> it would be like 2100 a week. >> reporter: they were using their empty schoolhouse as a makeshift shelter for the overflow of families. one of the migrants tested positive last week, they had to shutdown, but with a steady band of volunteers, he's committed to reopening. >> we've got plenty of beans and we've got plenty of rice and we've got plenty of room and we're doing fine. >> reporter: there's no desire for a solution? >> of course there is. but that's beyond me. i'm a parish priest on the south side of mission. people tell me they need food and a place to stay.

if i could fix it, i would, but that's a higher science than i know about. >> reporter: home land security secretary alejandro mayorkas will be here to talk with local leaders and look at what we showed you just now. one of the concerns local leaders have is they can provide the shelter, they can provide the food and covid testing, but they have no authority to keep anyone here, to force anyone to stay in these facilities. >> that was our miryea villareal in don't settle. start your day with secret. secret stops odor-causing sweat 3x more. and the provitamin b5 formula is gentle on skin. with secret, outlast anything! no sweat. secret. ♪ all strength. no sweat. ♪ depression. multiple symptoms hold you back. it's hard to get out of your driveway, and your own way. gotta change this. so you doctor tells you about trintellix, a prescription medicine for adults with depression. and you feel this overall relief.

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the new school year is already getting underway in parts of the country and that has health officials fearing a new surge of covid cases. kids younger than 17 are the least vaccinated of any eligible age group. close to 60% of 12 to 17-year-olds are also unvaccinated. and covid hospitalizations for 5 to 17-year-olds has jumped more than 84% since mid june. some teenagers are taking it upon themselves to encourage their friends to take the jab. adriana diaz has that story. >> reporter: there is a good reason the school principals are on the plank. this block party with the dejay, funnel cakes and free back packs is a philadelphia school district vaccination event. targeting students 12 and up

before they go back to school, and they enlisted a special group to help. the philly teen ambassadors. 27 teens who volunteered to educate their peers about the vaccine. her whole family got covid. >> there's a lot of false information out there, especially with social media being around and we're there to spread real information, let them know what's up. >> let them know what's up. >> reporter: what's your tag line? >> we provide the facts so you can get the vaxx. >> reporter: the ambassadors including 17-year-old karen abraham and 13-year-old devon hester organize events. >> and if you know anyone -- >> reporter: canvas neighborhoods. and on social media. >> get the vaccine to help the community. get the vaccine to help your immunity. ♪ >> reporter: they try to debunk vaccine rumors. >> we provide the facts so you

can get the vax. >> the main ones we were were the magnet one which is very popular on tiktok. basically it's like you get the vaccine and you can stick the magnet to where you got your shot. >> reporter: and that's obviously not true? >> not at all. >> reporter: what else are you hearing? >> people turning into zombies, not true. like the alternating of dna kind of thing. that's where i come in and tell them what's actually in the vaccine, so mrna lipids, salts and sugars. everything you're hearing online isn't true. >> we have teenagers here. they're registering to be vaccinated. >> reporter: the resistance is real. most teens we spoke to here were heitant until now. you guys are all siblings. >> yes. >> reporter: you're all here to get vaccinated. did you always want to get vaccinated? >> no. >> i didn't want to get it because i didn't trust it. a lot of fear of the government, people get it and they're fine,

so i'm okay with getting it now. >> reporter: dr. sage myers runs vaccinations for the children's hospital of philadelphia, a partner of this event. >> i think teenagers like everyone else have seen all the sort of memes that have gone on and the videos. sometimes they're just a little afraid in general of getting a shot. that's one of the reasons the ambassadors have been amazing and just having a peer with them as really made a huge difference. >> reporter: every single day public health officials are on tv. does that have any impact on teens, you think? >> no, because some teens follow after their parents, and their parents think that the system doesn't always work. and that their testing -- unless it's a teen on there that's talking about the vaccine, i don't think it's helping. >> reporter: you guys are going to tell me what's the name of the girl that sings the driver's license song? >> olivia rodriguez. >> reporter: her going to the white house and talking about the vaccine have an impact? >> yes. >> reporter: yeah? >> it's important to have conversations with friends and family members encouraging all communities to get vaccinated.

>> i saw thousands and thousands of people on tiktok posting about it. >> reporter: posts they hope will fight vaccine resistance. >> a lot of people are really hesitant to get the vaccine, and those communities are getting -- >> reporter: it's okay. >> sorry. >> reporter: that's all right. okay, all right. >> that community has been through so much. >> reporter: already. >> yeah. and now like with covid, they're dying even worse, getting hospitalized and like there's a solution. there's a hope. >> reporter: here in the philadelphia school district vaccines are recommended but not required. how do you feel about that? >> then most kids won't get it because they feel like it's not cool. they feel like they're tougher than the vaccine. >> reporter: you're not trying to convince people to get vaccinated. you're trying to make the vaccine cool, so to speak?

>> i wouldn't say we're trying to convince people. we're more on educating them because at the end of the day it's their choice. >> reporter: you provide the facts -- >> so y

as the pandemic lingers on, the sale of recreational vehicles continues to set records. more than 50,000 rvs were sold in june. that's up 25% from the year before. it's also led to shortages at many dealerships. deeana demetrius has this story. >> reporter: rvs continue to roll out at a record pace. have you seen anything like this before? >> in my 12-year career, no. it's sales and memorial day in 2020 kind of skyrocketed and they haven't let down at all. >> reporter: they're so popular sales manager garrett connelly is having trouble getting new replacements on the lot. it's an issue facing dealers nationwide including in eastern texas. >> sales are off the charts, but

the supply is down. i have one manufacturer who won't fulfill any of our orders unless we can show them that it's a sold unit. >> reporter: the pandemic forced factories that make rvs to shutdown temporarily whchlt they came back online, manufacturers faced supply chain issues that continue to this day. shortages from lumber to furniture and appliances are keeping rv makers from getting projects finished. >> everything done but maybe a board over a window because they can't get that window in or an ac unit not there. >> reporter: the problems are not expected to ease any time soon. what is the typical wait period? >> it really depends on the particular product. generally speaking now it's at least a three-month wait period. >> reporter: some rvs are sold out up to a year. many customers buying now may have to wait until next spring or longer. deeana demetrius, cbs news, loss. and that is the overnight news for this wednesday.

for some of you the news continues. for everyone else check back later. follow us online any time at cbsnews.com. reporting from the nation's capital, i'm errol barnett. good morning. this is cbs news flash. i'm tom hanson in new york. first to northern california where the dixie fire has destroyed roughly 900 structures, 16,000 still under threat. the fire is about 25% contained. it's the second largest wildfire in california history. neither snow nor rain will stop the u.s. postal service, but now it might cost you more ththis holiday. the agency is proposing new fees, up to $5 october through december, to stay competitive. and check the freezer. serenade foods recalled nearly 60,000 pounds of chicken for possible salmonella contamination. brands include dutch farms, milford valley, and kirkwood shipped to distributors

nationwide. and for more, download the cbs news app on your cell phone or connected tv. i'm tom hanson, cbs news, new york. it's wednesday, august 11th, 2021. this is the cbs morning news. >> the best way i can help now is if i step aside. >> sudden resignation. governor andrew cuomo is leaving office in the wake of a sexual harassment scandal. why he could still be impeached and the woman who will be replacing him. breaking overnight, taliban takeover. the militant group seizes more territory in afghanistan as fears grow about the possible collapse of kabul. trillion dollar deal, the senate passes a massive

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