>> thanks for watching. see you back here in half an hour for a full hour of news at 6:00. >> quijano: death by drone, a u.s. air strike reportedly takes out mullah akhtar mansour, the leader of the taliban. cso tonight, a new cbs news poll shows how donald trump and hillary clinton match up in two key battleground states. we're in vietnam for president obama's historic visit. trouble at the top of mount everest-- altitude sickness kills two climbers, dozens more are struggling. and a tragic day at the races. two horses lose their lives at the preakness stakes, reigniting concerns about the sport. te captioning sponsored by cbs this is the "cbs weekend news." >> quijano: good evening, i'm elaine quijano. this is the western edition of the broadcast. five years after the raid that

killed osama bin laden, the u.s. military has again reached into pakistan to take out a notorious terror leader. the afghan government confirms the leader of the taliban mullah akhtar mansour was killed this weekend in a u.s. drone strike in pakistan, mansour had been blamed for the deaths of many u.s. troops across the boarder in afghanistan. u.s. officials say president obama personally authorized the strike. here is elizabeth palmer. >> reporter: this according to the afp news agency is the ttermath of the drone strike. the burned out car mullah akhtar mansour had been riding in, and at least two charred bodies. there is only one known photograph of mansour, an afghanistan's intelligence agency said he had been under close surveillance for awhile. secretary of state john kerry on a visit to myanmar confirmed the attack. >> yesterday the united states conducted a precision air strike

that targeted taliban leader mullah mansour in a remote area of the afghanistan-pakistan border. >> reporter: in fact, the strike actually took place inside pakistan in an area the afghan taliban use as a base. mansour took over as head of the taliban last summer after the death of the group's first leader mullah omar was announced. under mansour's leadership the taliban has continued to fight both the afghan security forces and the u.s. military. and afghanistan's chief executive abdullah abdullah told government members-- "mansour was a barrier to peace talks and was responsible for much violence against the afghan people." pakistan set up formal peace talks between the afghan government and the taliban. but mansour refused to attend. now that he is apparently dead, the taliban will be under renewed pressure to negotiate. and elaine, the pakistani

government has just said that it wasn't consulted before the strike on mullah mansour, just as it wasn't consulted before the strike on osama bin laden. and it's complained that this is s serious breach of its sovereignty. >> quijano: elizabeth palmer in london, thank you. the new commander of u.s. forces in the middle east made a surprise visit to syria. army general joseph votel said ai wanted to look at the progress of arab and kurd fighters in the battle against isis. and the iraqi army is warning citizens to get out of fallujah. iraqi forces say they're gearing up to take the city back from isis. about 180 miles off the egyptian coast the search continues are for the black box data recorders from egyptair flight 804. it went down thursday killing all 66 people on board. saiy the u.s. navy said it found more than 100 pieces of debris. holly williams is in alexandria, egypt, with a newly released audio recording from the doomed het.

>> reporter: the recording captures a standard check in between the pilot and air- traffic control over zurich, in switzerland. >> reporter: around two and a half hours later, the plane began to move erratically, losing altitude and then plunging into the water. egypt's president abdel fatah el-sisi said today that his country is sending a submarine to recover the plane's flight recorders. or so-called black boxes. in the same area where they found debris from the crash, including human remains. retrieving the black boxes in water up to 10,000 feet deep could prove difficult.

a u.s. intelligence source told us that the flight recorders have been approximately located via the electronic pings they emit. but so far there has been no official confirmation. data published by avherald, an aviation industry website appeared to show there was smoke on board just before the plane crashed. though experts say the smoke alarms could also have been triggered by a sudden loss in pressure. alastair rosenchein is a former pilot with british airways. >> we can rule out pilot error, human error, because there is no human error that would have triggered smoke alarms. >> reporter: officially, though, no cause has been ruled out, including terrorism, even though according to u.s. investigators there have been no inveible claims of responsibility. elaine. >> quijano: holly williams in alexandria, egypt. thanks. president obama arrived in

vietnam sunday. he's only the third sitting u.s. president to visit the communist nation. later this week he'll be in japan. >> margaret brennan is traveling with the president and joins me from hanoi. margaret what is the president hoping to achieve on this trip? >> reporter: well, elaine, the goal here in vietnam is to turn this former foe into a friend and in doing so send a very strong message to china that the u.s. will not let them militarily dominate all of asia. china's currently locked in a number of territorial disputes in both the south and east china seas. o president obama is considering expanding weapons sales to vietnam. that is a controversial decision considering that this country is still run by an authoritarian communist government. >> quijano: margaret, later this week the president will be the first sitting president to visit hiroshima, why has he decided to go? >> reporter: well, this

extremely symbolic visit is mainly to underscore his legacy of securing nuclear weapons through arms control deals like the one he brokered with iran. so in hiroshima president obama will be underscoring the fact yhat the very first atomic bomb ever dropped were by the u.s. on japan in 1945. and they killed hundreds of thousands. so he's not going to apologize for those attacks but he will say that it gives the u.s. a unique responsibility to make sure that no nuclear weapon is ever used again. >> quijano: all right, margaret brennan in hanoi, vietnam, thank you so much. a new cbs news poll today shows how donald trump and hillary clinton match up in two key battleground states. julianna goldman is in our washington bureau with the latest on the presidential campaign. >> running for president is hard. i got to tell you. >> reporter: as hillary clinton

and donald trump prepare for a rikely matchup in the general election, a new cbs news polls shows them in tight races in two key battleground states. clinton and trump are virtually tied in florida with clinton just one point ahead in ohio the democratic frontrunner leads the presumptive g.o.p. nominee by five points. 44% to 39%. g i am going to be the nominee. i do i think there will then be the obvious need for us to unify the party. >> i think secretary clinton is jumping the gun a little bit here. >> reporter: bernie sanders is also tied with trump in florida, and in ohio he's beating trump by nine points. helped by young voters and independents. hae polls also show that both parties are unifying behind their likely nominee. helped by a sizable percentage of voters who are backing trump and clinton because they're against the other side. >> i will be running against donald trump in the fall. and do i not want americans and, you know, good thinking republicans as well as democrats

and independents to start to believe that this is a normal candidacy. >> reporter: on fox, the billionaire businessman warned that sanders' criticism of clinton has been tame compared to what he is ready to unleash. >> she shouldn't even be allowed to run for president. houlhas bad judgment. hillary is weak. she is a weak person. p reporter: two national polls out today show that trump and clinton are the least popular likely presidential nominees in modern history. more than half of registered voters have negative opinions of the two. and elaine, in one poll 47% say they would consider a third party candidate. >> quijano: julianna goldman in washington, thank you. there is trouble on mount everest. altitude sickness has apparently claimed the lives of two climbers in recent days and dozens more are struggling. demarco morgan is tracking it from here in new york. >> reporter: what a story. an official in nepal says nearly 30 climbers have gotten frost bite or become sick on mount everest over the past two days. two climbers did not make it

down from the world's tallest oruntain. 30 year old dutch climber eric arnold died shortly after complaining of feeling weak. he was able to get to a lower altitude. australian climber maria strydom also showed signs of altitude sickness before she died. some of the climbers were as high as 21,000 feet. still no word on the whereabouts of the two other climbers last seen near the summit. jim davidson knows all about the challenges at high altitude with 30 years of experience climbing the world's tallest peaks. s up on the summit of everest it's 66% lower in oxygen availability. and so as a result you can 2rely stand up and walk 20 feet across the ground can make your heart pound in your chest and make your head throb and make you dizzy, just literally standing up and walking 20 or 30 feet. >> reporter: last year's climbing season was canceled after the earthquake wrecked havoc on the area. climbing attempted were also halted in 2014 after an avalanche killed more than a dozen sherpa guides.

hare than 250 people have died in their efforts to climb mount everest, and since the first historic trek was recorded back in 1953, it has been an issue. >> quijano: punishing conditions on that mountain. demarco morgan, thank you so much. two horses died saturday at the preakness stakes in baltimore as jamie yuccas report, the tragedies are reigniting concerns about the sport. >> reporter: there were celebrations at the winner's circle for preakness winner exaggerator but his moment of triumph was overshadowed by the loss of two horses. homeboykris won the first preakness in maryland, then collapsed and died moments after having his photo taken in the winner's circle. his owner chris campitelli tweeted devastating loss. homeboykris died from apparent acart attack on walk back to barn after preakness day win. later four year old pramedya had to be euthanized on the track after breaking her left leg coming out of the final turn. dr. keith latson was the on-call veterinarian.

>> it was an open wound and that just does not have the possibility of surgical fixation. >> i grew up in hempstead. >> reporter: veterinarian gregory beroza says while the losses are devastating, these horses are specifically bred to race. >> when you have a good race .orse, they want to run. they feel good when they do it. >> reporter: the jockey club recently released statistics showing a 14% decrease in the frequency of fatal injury. 484 horses died at race tracks in 2015. and 583 died in 2014. both horses will undergo a necropsy to determine what went wong. people for the ethical treatment of animals or peta is also asking the veterinary records be seleased as well as medications used up to two weeks before race day. elaine? >> quijano: jamie yuccas, thank you. coming up on the "cbs weekend news," a paralyzed man finds new hope in an experimental stem cell treatment. cell

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♪ safelite repair, safelite replace. ♪ >> quijano: an experimental procedure aimed at repairing spinal cord injuries is showing promise. it uses stem cells in the damaged areas in hopes of restoring function and movement. dr. jon lapook has one patient's story. >> there's nothing we could have done to change that night. >> on april 9th, 2013, james mason was an accident waiting to happen. he had been drinking and his stepfather bob gambuti tried to stop him from driving. >> he grabbed on to me. i grabbed on to him. he grabbed my leg and pulled back, and his neck broke. >> i remember hitting the ground, the whole way with the stretcher. >> the most devastating part was the first day he lifted out of a bed and nothing moved, just his head. that really hit hard. at that point, i really wanted to go jump off a bridge.

>> mason was left a quadriplegic with just the slightest ability to move his arms. doctors said he would never walk again. gambuti, a retired cop became his full time care giver and found an experimental trial at new york's mount sinai hospital. >> we spoke with mason just before he underwent delicate neck surgery to try to repair the damaged portion of his spinal cord by injecting stem cells. >> what is going on in your head, what are you thinking, what are you hoping for? >> i'm just super excited, ready to just get it done and go back to rehab and start proving the doctors wrong. >> the surgery performed by dr. arthur jenkins took four hours. researchers have followed james and five other patients all with severe spinal cord injuries. >> squeeze as hard as you can. >> we met three months after the surgery. >> my wrist has gotten a lot stronger. i am able to grasp around a lot of things. >> and after another three months. >> i think it's almost doubled with how much i have gotten better.

and the sensation back into my feet, i can feel pressure on to them. throughout my legs and i have noticed that i have a little bit of movement into my hips now. >> today, the company sponsoring the trial reported four of the unx patients experienced improvement to both muscle strength and function. >> try pulling the thumb towards me. w dr. jenkins who is not affiliated with the company has continued to monitor mason. >> my two cents is, it worked. that this actually changed his neurologic recovery and function. that his actual functional improvement is from the stem cells that were injected. >> mason does not blame his r epfather for the accident. in fact, he's grateful. >> if i had gotten in my car, i could have killed someone else, someone's mother, someone's father, someone's child. if i were to survive through that, i wouldn't have been able to live with myself. >> it's tough and people say "oh, i'm sorry." don't be sorry. i still have him here. >> mason believes the stem cells accelerated his recovery but

it's hard to know what would have happened without them. more research will be needed to try to establish whether they actually repair damage to the spinal cord. dr. jon lapook, cbs news, new york. >> quijano: still ahead on tonight's "cbs weekend news," s e unusual sight that brought traffic to a crawl in los angeles. a painful, blistering rash. if you had chickenpox, the shingles virus is already inside you. 1 in 3 people will get shingles in their lifetime. after almost 3 weeks, i just really wanted to give it a shot. you know, i'm not feeling it today. talk to your doctor or pharmacist today about a vaccine that can help prevent shingles. whyto learn, right?e? so you can get a good job and you're not working for peanuts. well what if i told you that peanuts can work for you? while you guys are busy napping,

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completed an unusual odyssey in los angeles. terry okita has the story. >> reporter: crews cut no corners in relocating a massive space shuttle fuel tank. the size of half a football field, across 16 miles of los angeles. onlookers took selfies and watched from rooftops as the enormous tank rolls by. t you will make a great astronaut because you smile a lot. >> reporter: it took months to choreograph this move. police closed street, public works altered traffic lights and reility wires to make way for the 66,000 pound tank as it skirted by trees, traveling at just five miles an hour. astronaut charlie precourt. >> i can't wait to see it stacked in a vertical at the museum. it will blow people away. >> reporter: the fuel tank was dhipped from new orleans to california through the panama canal. it will eventually be displayed inside the california science center in full launch position. attached to two rocket boosters and the space shuttle endeavor which hitched a ride to los

angeles on top of a boeing 747 in 2012. the tank known at et-94 was built to propel endeavor into space. but nasa phased out the shuttle program before it could launch. astronaut kay hayer flew on endeavor an hopes seeing this will inspire young minds. >> think about taking us beyond where we have been in space exploration and taking the next step, back to the moon, on to mars. >> reporter: et-94 will be assembled for display with fdeavor by 2019. elaine? >> quijano: teri okita in los angeles, thank you. up next, a mother and daughter are reunited after 50 years of separation. separation.

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>> quijano: finally tonight, a mother and her daughter separated decades ago have been reunited and barry petersen has their story. >> i'm nervous, i'm excited. i have waited 50 years for this moment. >> reporter: for cyndy burns, the wait is over. it started when she was a ten- month-old baby left with a gerean adoption agency, amid that country's poverty, this was a chance at a better life in america, believed her korean mother sun cha. did you believe you would ever see your daughter again? >> no. i don't believe it. i don't know how i'm going to find her.

g> reporter: cyndy grew up in a connecticut family. she had all but given up finding her birth mother. >> i had gone to korea last kiar, kind of looking for her. and i made peace with the fact that i would probably never find her. ha reporter: when a d.n.a. sample led her to sun cha. >> it says 99.99% she is your biological mother. i just so much wanted it to be true. >> reporter: there was more. her mom had been living on the west coast. they had been in the same country for decades. cyndy flew to tacoma this weekend to meet her mom. >> you're so beautiful. >> i always say, "where can i find her?" i didn't know where she is. >> you're together now. >> uh-huh, i know. >> reporter: when we sat with

them, they couldn't stop holding each other as if they were afraid they might lose each other again. what does it say about your mother that she was willing to be open about this secret that all of her life she hadn't shared with her family? >> it's confirmation that she did love me. ep reporter: at sun cha's home, there was a family reunion. cyndy with her newly found sisters and brother. >> it's what all of us who are adopted want, is for our existence to be validated. >> here we go. >> and to know that our parents loved us. >> reporter: barry petersen, cbs news, tacoma, washington. >> quijano: clearly so much love in that family. well, that's the "cbs weekend news" for this sunday. later on cbs, "60 minutes." i'm elaine quijano in new york. for all of us at cbs news, thank you for joining us, and good night. captioning sponsored by cbs

captioned by media smash & grab heist at a baya gun shop. toney chaplin: there's a lof officers out there that are wanting to do the good work. we're t minority d new at 6:00, deadly weapons in the hands of criminals after a smash and grab at a bay area gun shop. >> we're talking about the small minorities out there dog the things they've got no business doing. >> also new at 6:00, we go one-on-one with san francisco's newest top cop about his plans to turn the troubled department around. >> firefighters and neighbors rush to save a little boy trapped in the inferno. good evening, i'm juliette goodrich. >> and i'm brian hackney. we start with the brazen break-in. it put an unknown number of guns on bay area streets. it happened at a gun shop in san

carlos. anne makovec shows us the damage. >> reporter: burglars smashed their way through the gun shop on el camino real this morning. bill works next door. >> i was told a vehicle, a truck drove in to the gun shop and took many, many guns. >> reporter: investigating officers won't say how many but from the looks of the smashed gun cases now sitting in a truck bed outside, the burglars had their way with the inventory. >> there was more scary people out there with guns that shouldn't have them. >> reporter: officers this morning canvassed neighboring businesses hoping to find some sort of surveillance video of that crime. those business owners we spoke with had nothing worthwhile. >> working on only movement and there wasn't any. >> reporter: as the sheriff's office and the atf try to find the culprits, the owner is trying to secure his business the best he can. >> if somebody would