and that's it for us at 5:00. we'll see you back here at 6:00 for a full hour of news. ♪ >> quija ksan denies a u.s. charge that it's behind attacks on the world's largest oil refinery. >> if the iranian regime is responsible for this attack, we're not going to stand for that. >> whether the iranians directly engaged in this has yet to be eeen. >> quijano: is a price spike at the pump next? also tonight, on strike-- why thousands of g.m. workers are trading assembly lines for picket lines. tent courthouses open for migrants in limbo as the border crisis shifts south. medicare fraud, a cbs news investigation exposes a new scheme to rip off taxpayers and tracks down a doctor involved. >> hi. i'm jim axelrod with cbs news. >> quijano: why scientists are

on a mission to the warming arctic to get trapped in the ice. and mighty mo. jamie yuccas introduces us to a senior who is a speed demon in the pool. >> have people told you, why, i can't believe you have so much energy? >> only you. this is the "cbs weekend news." >> quijano: good evening. i'm elaine quijano. president trump tweeted tonight that he's ready to release oil from the strategic petroleum reserve if needed after drone attacks this weeri the world's largest refinery and nearby oil fields. the facilities in saudi arabia were hit by drone strikes this weekend, shutting them down. at the same time, there is a blame game over who is responsible and what is ahead for all of us at the gas pump. nikole killion is at the white house.

>> lates sunday, president trump says it knows the culprit, locked and loaded depending verification from the saud saudi kingdom. but earlier, secretary of >> secretary pompeo has made clear that the iranian regime is responsible for this attack on civilian areas and infrastructure vital to our global energy supply. we're not going to stand for that. >> yemen's houthi rebels claimed responsibility, but pompeo. >> statements yesterday were absolutely right, i think this was very clear this was the iranians. >> i thin >> i think it's safe to say the houthis don't have the ability to do a strike like this without the iranian's assistance. >> reporter: saudi arabia says the attack cut its oil supply in half, disrupting production. oil prices could spike when markets open monday.

>> if this is a prolonged problem, yes, we have major hit to oil markets. >> reporter: the energy department says they are prepared to tap into reserves to offset any disruptonpetemorici e longer it takes for saudi arabia to recover, prices at the pump could increase by as much as 50 cents a gallon, though he says it's unlikely. >> this is a temporary disruption. the only real threat is if we get into some conflict with iran over it. >> reporter: the white house says the president is still considering his options when it comes to potential talks with iranian president hassan rouhani. later this month at the u.n. geral assembly, it warns iran isn't helping its case with a saudi attack and will continue its maximum pressure campaign on iran regardless of whether they meet. elaine? >> quijano: nikole killion, thank you. supreme court justice brett vavanaugh has been hit by a

newly reported sexual misconduct accusation. today's "new york times" reports a former yale classmate tried to tip-off senators and the f.b.i. last year, but according to the paper, the f.b.i. did not investigate. president trump today fired back, tweeting kavanaugh should "start suing people." justice kavanaugh has denied all previous misconduct allegations. the united auto workers is on strike against general motors, more than 45,000 workers are expected to walk off the job at plants nationwide just before t a new tentativdeal. the walkout the union's last resort. >> we are standing up for affordable, quality healthcare. we are standing up for our share of the profits. >> quijano: thou first strike at g.m. since 2007 and the first since the financial crisis and bailout of

the automaker a year later. asylum seekers waiting in mexico get their first day in court e morrow. the official opening of the trump administration tent courts. the temporary tents, intended to ease the strain on immigration s urts, will handle cases by ldeo conference. judge and lawyers not present. mireya villarreal is on the border in matamoros, mexico. >> reporter: this is the government's solution to the immigration court backlog and the massive amount of migrants igying to make their way into the united states. annce the remain in mexico program began, mpp, this tent city has boomed. saere are hundreds if not thousands here waiting for their day in court 100 yards from the port of entry. there is a second group here, as rll, who have been waiting bnths to legally request asylum in the u.s. and won't be able to do that any longer. a new immigration policy says migrants have to ask for asylum in the first country they arrive in. so if they're coming here from honduras, they have to make or ask the mexican government for

asylum first before getting a chance to request in the u.s. immigration attorneys trying to help these people tell us these new tent courtrooms will help speed up the process, but it won't make gaining asylum in the u.s. any easier. elaine? >> quijano: mireya, thank you. in afghanistan today, afghan soldiers backed by u.s. forces said they killed 38 taliban fighters, including two senior commanders. charlie d'agata is in kabul, where the country's defense minister says the fight is being taken to insurgents. >> reporter: the taliban say they're still open to dialogue with the u.s. [gunfire]. until then, it's war with an intensity a general here described to us as unprecedented. at the top of afghan command is defense minister asadullah khalid. so how is your relationship between afghan forces and u.s. forces? >> i think there should be no

question, because they are working together. they are dying together. they are serving together. f reporter: and fighting together. nealid is the point man for u.s. deneral scott miller, the commander of the american-led mission and its 14,000 u.s. troops. together they have pursued a dual strategy of killing as many taliban fighters as possible while launching special forces ntids aimed at dismantling isis and al qaeda terror networks, which we witnessed up close in kabul for ourselves. >> i can tell you, they are the backbone. >> reporter: a backbone backed up by u.s. guidance, lligence, aner what will it mean then if u.s. forces are to withdraw from here? >> most of the operation now, afghan forces are doing this operation independently. >> reporter: the defense minister told us his troops are ni the forefront of 90% of the

fight across the country. price, he said the taliban is suffering more casualties than ie afghan military. elaine? >> quijano: charlie d'agata, thank you. a cbs news investigation uncovered a new medicare fraud that could potentially cost taxpayers hundreds of millions of dollars. the scheme begins with a recruiter enticing seniors to submit a d.n.a. test. jim axelrod discovered how it works. epr:t is h m the tents at this fort lauderdale art festival, where the trouble began for ken and judy johnson. the pair of retirees from austin, texas. >> there was a couple of people in there saying come get your d.n.a. tested. >> reporter: the company, genexe health, billed itself as a genetic testing one-stop shop with a quick cheek swab the johnsons could learn if they carried any genes that made a cancer diagnosis more likely. >> i have had colon cancer. >> reporter: so this was like a blinking neon signep s$1h of c w

accounts, and yet to this dayivt results. do you think some people need to be taken away in handcuffs? >> absolutely. >> it's just pure greed, pure, pure greed. it had nothing to do with taking care of the community. >> reporter: while genexe is headquartered in denver, they country.ruits throughohe this woman, who asked us not to gee her name, was the office manager in texas. documents she shared with us bhow in her less than three months on the job, recruiters for genexe swabbed more than 2,300 seniors. >> these swabs get lost. i would find them in the garbage. >> reporter: this sounds like a complete mess. >> it was. so there was an old refrigerator. and it was --. >> reporter: wait, wait. the refrigerator where the swabs were stored wasn't in some lab? >> no, no, no, this was in that

office next to people's hamburgers. >> reporter: it was in the lunchroom? s yeah. people were waiting for these tests and would never get them. >> reporter: medicare pays the lab processing the swab, as long as a doctor has signed a test order. so recruiters partner with willing labs and doctors who certify the tests are medically necessary. r: hello. >> reporter: this is the doctor who signed the johnson's test order, daniel canchola, but ken and judy johnson have never seen, spoken to, or heard of tim. >> it just didn't add up. it didn't make sense. we don't know this guy. >> reporter: dr. canchola declined to answer any questions about the test orders he signed, so we met him in the parking garage of his dallas office. dr. canchola, i'm jim axelrod with cbs news. i'd like to ask you some questions about a genetic test you ordered. ee i need to have you speak to my representative. >> reporter: would you representative be able to tell

us for people who say they have never met you? >> thank you. >> reporter: can i ask you if this is ethical common practice to sign test orders for people who have never met you, never noken to you, never been examined? do the names ken and judy johnson mean anything to you? and with that he was gone. >> quijano: jim axelrod reporting. dr. canchola never did give cbs news the name of his representative. in a statement, genexe health says it performed a very limited service and had no involvement in either performing tests on samples or submitting claims to the government. we have learned genexe health is under federal investigation and now medicare beneficiaries are being warned about the latest ow and trust should order and approve any requests for genetic testing." it was a terrifying scene in the er wildwood last night. decks collapsed on top of each

other at a three-story home. nearly two dozen people were irt, including three children. the town was hosting an annual firefighter's convention. many of them raced to the rescue, ripping away decking and pulling the injured to safety. tropical storm humberto is powering up. the storm is forecast to become a hurricane later today. bermuda may be at risk, but the east coast is not. straight ahead on the "cbs weekend news," a new expedition sads to the arctic to find out why the ice is melting so fast. how a new drug could soon help kids with dangerous peanut allergies. and swimmers take your mark, but watch out for mighty mo. johnson & johnson is a baby company.

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climate change as a crisis or serious problem. our poll also shows 56% think right now is the time to address it. the arctic is a major hot spot. as debora patta reports in our series "eye on earth," a new expedition is on the way to find out why the ice is melting so fast. >> reporter: 300 scientists have been training in sub-zero temperatures in preparation for the trip of a lifetime. they will spend months trapped in sea ice as part of a year- long arctic expedition studying. >> we're looking at creating a whole picture of what the arctic is going to do in the coming orars. >> reporter: rhode island native alison fong heads up the ecosystem research team. polar bears are a major concern. lle might have to swappe >> all of our scientists are trained in polar bear safety, which includes carrying a rifle

for protection. when we work in remote sites on the ice, we will take small electrical fences with us and personnel carrying rifles and flare guns and other types of safety equipment. >> reporter: home base is this german ice breaker, the polarstern. it will be fitted with scientific equipment, turning it into a floating laboratory. what happens in the arctic doesn't stay in the arctic. it's usually considered an early warning system for global climate change, and scientists e,e hoping the expedition on this ship will raise their understanding to a whole new level. here they get taste of what lies ahead, practicing using a asuresight thr the icevice which and drilling through the core to assess ice thickness. the arctic is warming faster than anywhere else on earth, but scientists have never been able to conduct research in the remote northern parts during ernter.

now they will attempt an unprecedented scientific e ssion. the crew will sail close to the north pole, cut the engine, and wait for water to freeze around the vessel. they will then simply drift with the ice flow. markus rex is the expedition leader. >> in the u.s. in the beginning of this year, when the snowstorms and blizzards went down to florida, that is all driven by climate change in the arctic. we need to understand that to understand how our extreme weather in the future wi >> reporter: mental fortitude is cienrmidable challenge. ghe scientists are bracing themselves for long periods of total isolation and complete darkness. in the winter months, they will never see daylight. but freezing yourself in ice is worth it, they believe, if it helps save humanity from the extreme consequences of a warming world. debora patta, cbs news. >> quijano: ws wilspecl climates

week leading up to the united still ahead on the "cbs weekend news," why a new drug could soon help children with dangerous man 1: ...caused liver damage. vo: epclusa treats all main types of chronic hep c. vo: whatever your type, ask your doctor if epclusa is your kind of cure. woman 2: i had the common type. man 2: mine was rare. vo: epclusa has a 98% overall cure rate. man 3: i just found out about my hepatitis c. woman 3: i knew for years. vo: epclusa is only one pill, once a day, taken with or without food for 12 weeks. vo: before starting epclusa, your doctor will test if you have had hepatitis b, which may flare up, and could cause serious liver problems during and after treatment. vo: tell your doctor if you have had hepatitis b, other liver or kidney problems, odiitio...: ..nd aedrb supplt.

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>> quijano: the f.d.a. has taken a major step to approving the oirst drug to treat life-es. they affect one in every 50 kids. here's dr. jon lapook. he when i was younger, my mom always had to make everything from scratch. >> reporter: danielle tryon has ond multiple food allergies, including to peanuts, since she was a toddler. from early on she learned the tne art of avoiding exposure. >> even just being in rooms, any time i smelled peanut butter, i've been hyper alert. it's something that can kill bu. >> reporter: she's had to be given adrenaline four times to counter life-threatening reactions. >> it was hard. >> reporter: in 2016, danielle enrolled in a trial for new treatment. ents sllow ara amount of peanut protein and gradually scale up. >> you slowly make your body get used to it. >> reporter: this doctor at children's hospital in tolerate the equivalent of two

peanuts, but nearly 12% withdrew because of allergic reactions or side effects like stomach problems. >> it means cross contamination is not such a big issue. you can't go home and have a utanut butter sandwich, but you should be able to walk out with less fear. >> reporter: the treatment has already given danielle, now 17, a taste of her new freedom, like getting a sundae at an ice cream ehop for the first time. >> we gave it to her and watched pr eat and taking pictures. leople probably thought we were wdiculous. >> reporter: and imagining life in a college dorm. >> i cannot believe that that's right down the line now. >> she's got her wings. she might as well go off and fly. >> reporter: it's not a cure. we're talking about accidental exposure to a small amount of peanut protein. aink of the child who is afraid no go to school or a birthday party or even to a restaurant because they're afraid of y tting accidentally exposed to peanut protein and having a severe reaction. for that child, they're not going to be able to have an ice t butter, but they could have a more normal life.

dr. jon lapook, cbs news, new york. >> quijano: next on the "cbseto. lap after lap, she's proving age is just a number. p) the ups and downs of frequent mood swings can plummet you to extreme lows. (crying) lift you to intense highs. (muffled arguing) or, make you feel both at once. overwhelmed by bipolar i symptoms? ask about vraylar. some medications only treat the lows or the highs. vraylar effectively treats depression, acute manic and mixed episodes of bipolar i. full-spectrum relief of all symptoms. with just one pill, once a day. elderly patients with dementia-related psychosis have an increased risk of death or stroke. call your doctor about unusual changes in behavior or suicidal thoughts. antidepressants can increase these in children and young adults. report fever, stiff muscles, or confusion, which may mean a life-threatening reaction, or uncontrollable muscle movements, may be permanent.

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ipr, but we're definitely her biggest fans. t oh, they are. wan want a hug, too. >> reporter: around the pool, the woman known as "mighty mo" is a legend to everyone but herself. so how many awards have you won now? >> i have no idea. l reporter: you lost count? >> i never counted. >> reporter: we counted. among senior master swimmers, she's earned 14 world championship gold medals, has set 28 world records, and was recently inducted into the international swimming hall of fame, all in a career that began at age 65. that sounds crazy. >> it probably was and is. >> rte cld of the depression, maurine was told good girls don't play sports. -l reporter: this late-in-life hobby also inspires her new family of teammates. >> what i like about the team is seeing them starting from little

or nothing into becoming quite accomplished. that's really neat. >> reporter: they train at the rose bowl aquatic center in pasadena. when you jump into the pool, all i could think was the little old lady from pasadena. ♪ little old lady from pasadena ♪ have people told you, i can't believe you have so much energy. >> only you. >> how did you do? >> she kicked my rear. >> reporter: what's the key to long life? >> just luck really. >> reporter: the truly lucky ones-- those who have gotten to know the mighty mo. >> we love you. >> reporter: jamie yuccas, cbs news, pasadena. >> quijano: what an inspiration. that's the "cbs weekend news" for this sunday. "60 minutes" is coming up. i'm elaine quijano reporting. thank you for joining us and good night. captioning sponsored by cbs captioned by

just how badly is vaping affecting california? out of those who got sick while vaping, one out of seven was from here. and we are still on track for our first rain maker of the season. i'll show you how much, more importantly, what part of the day we're likely going to see these light showers coming up. we begin with what could be the biggest bay area ban on e-cigarettes. >> some startling new numbers. >> we're learning that california is bearing the brunt of all these vape-related illnesses in the country.

out of all the cases, 1 out of 7 are here in california. >> if i could, i'd go back and not put anything in my lungs. >> reporter: rickyas in e-cigartehe sudyto e hospital acute liver failure. doctors put him in a medically induced coma and on a feeding tube. he's now weakened but recovering, 30 pounds lighter, and afraid to fall asleep at night. >> there's definitely that question of if i go to sleep, am i going to wake up? >> reporter: the cdc is investigating more than 450 cases of vaping-related illnesses nationwide. now the california department of public health has revealed it's inst