would you show us how to use facebook better, would you help us get our conservative message out, they were not very interested in assisting us. >> facebook hasn't done anything wrong. >> reporter: attorney david green, who defends civil liberties of the electronic frontier foundation, sees the facebook meeting as evidence the first amendment is alive and well on the internet. >> i think it's actually a really nice model for the way, you know, free speech works in our country. they have the right to make these editorial decisions and other people have the right to call them on them and say we don't like it. >> reporter: in spite of their big thumbs up sign, anthony, facebook gave a thumbs down to aloulg reporters into today's meeting. >> john blackstone. thanks, john. the "cbs overnight news" will be right back.

it was 62 years ago this week thathe supreme court outlawed segregation in public schools. but it never went away. a study ordered by congress found the percentage of high-poverty schools with mostly black or hispanic students has more than doubled since 2000. michelle miller went to a district in the deep south that's been ordered to desegregate. >> reporter: the mississippi delta town of cleveland has been grappling with its segregated past for 50 years, and now its time has run out. in a ruling, a federal judge ordered the district to merge two high schools and two middle schools, saying "the delay in desegregation has deprived generations of students of the constitutionally guaranteed

education." jamie jacks, the school district's attorney, says the order doesn't give the full picture. >> we have kids learning side by side each other of different races. if you travel to our surrounding communities here, you'll see that doesn't exist. but we have it here. >> reporter: the problem centers around cleveland's two high schools. cleveland high is an historically whites-only school and is now evenly split. but east side high still has a student body that is virtually 100% african-american. students we spoke to fear the impending change. >> it's this side of the highway versus that side of the highway. it's been a rival for a long time. >> reporter: margaret schwartzbaker's kids go to cleveland high. reverend edwin duval's to east side. >> i think the white are afraid to become a minority and lose control. >> but i think it's

to move forward i think as one unified school where everybody can accelerate. >> reporter: school desegregation protests across the country are part of an ugly past. and the fight continues in the courts. there are currently 177 active school desegregation cases. half in mississippi and alabama alone. deputy assistant attorney general vinta gupta heads the civil rights division. >> i do think it's jarring to people to know that in fact still many of our schools remain segregated and that that is something we need to change. >> reporter: here the debate is how to make the change. michelle miller, cbs news, cleveland, mississippi. more than 4 million american workers will soon become eligible for overtime pay under new rules issued today by the obama administration. but will they end up with more money or fewer hours? don dahler takes a look. >> please, table 10.

>> thanks. >> reporter: with the lunch rush fading in his manhattan restaurant, owner james mallios has a chance to catch up with some of his employees. he says the new overtime policy is overdue. >> when workers are well paid, they're more productive at work. >> reporter: currently only salaried workers making less than $23,660 are eligible for overtime pay. the new policy raises that threshold to $47,476. affecting some 4.2 million people. >> what are you going to do for them to comply with this? >> there are four employees who are impacted by this decision, and we will be raising their salaries to comply with the new requirements. >> reporter: in restaurants, retail stores, and other small businesses employees designated as managers often work up to 80 hours a week but did not qualify for overtime. in ohio today vice president joe biden promoted the new rules. >> when you're deprived your dignity, in my view, when you know you're working much, much harder and much, much

than you're getting compensated for. >> reporter: but critics of the plan warn it could backfire. david french of the national retail federation calls it a career killer. >> but in the real world most employees probably won't see overtime. instead their jobs are going to be changed and they'll be reclassified. they'll effectively be demoted from a salaried position where they're exempt to an hourly position where they're non-exempt. >> reporter: to placate businesses bonuses will be considered salary income. anthony, the policy won't take effect until december. >> don dahler. thanks, don. the pentagon says two chinese fighter jets flew within 50 feet of a u.s. navy reconnaissance plane yesterday in international air space over the south china sea. the american pilot called it an unsafe intercept and descended quickly to avoid a collision. for more than two years the world's demanded that nigeria's government bring home more than 200 girls kidnapped from their school bth

today debora patta reports one was found, not by the military but local residents. >> reporter: she was number 127 of the kidnapped school girls. amina ali and her four-month-old baby were found today near the zambiza forest where she was collecti ining firewood. she was with this man, identified as her husband and a boko haram soldier. the girls were violently snatched from their school two years ago. since then the nigerian government has been unable to free the girls or even find them. the kidnapping sparked global outrage and a campaign called "bring back our girls." ♪ which only intensified when the extremist group released video claiming to show its christian victims converting to islam. but despite the worldwide attention, the trail went cold until last month when a new video surfaced, appearing to show at

girls were still alive. for desparing parents it rekindled hopes of seeing their daughters again. ali's survival will only fuel those hopes. with little else known, ali's baby may be the most important detail to emerge today. it's a familiar story. isha mousa, whom we met recently in a refugee camp, was also forced to marry her boko haram captor and gave birth to his child. traumatized and stigma tides by her community, mousa's child has branded her spoiled goods and only prolonged her ordeal. amina ali has been reunited with her mother and is being debriefed by the nigerian military. it's hoped she will be able to provide some intelligence on boko haram and the other girls still being held. >> debora patta in johannesburg. thanks, debora. a new study says surviving colon cancer may depend on where the tum i

and an actress does her part to close the hollywood pay gap. the "cbs overnight news" will be right back. te sauce. peanut butter cups. tonight is perfect. can someone read me another story? daddd? mmm coming breyers gelato indulgences it's way beyond ice cream. this pimple's gonna aw com'on.ver. clearasil ultra works fast to begin visibly clearing up skin in as little as 12 hours. and acne won't last forever. just like your mom won't walk in on you... forever. let's be clear. clearasil works fast. jill and kate use the same dishwasher. same detergent. but only jill ends up with wet, spotty glasses. kate adds finish jet-dry with five power actions that dry dishes and prevent spots and film,

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then actually stays that way. lysol that. a study out today helps answer a question that has troubled oncologists. why do some patients with colon cancer survive longer than others? here's dr. john laok

glassco had surgery for what was thought to be an early-stage colon cancer. >> it had actually spread across my body. so at that point they staged it stage 4 colon cancer, not in the terminal sense but in the fact that it had moved. >> reporter: she had six months of chemotherapy, but earlier this year the cancer returned, prompting another round. >> today's the halfway through mark. the side effects are hitting me a little bit harder than they did last year. >> reporter: her cancer had started on the right side of the colon, a location that can be more deadly. today's study of patients with advanced colon cancer found those with tumors on the right side survived an average of 19 months compared to 33 months for those with tumors on the left side. dr. richard goldberg is an oncologist with the ohio state university comprehensive cancer center and is a co-author of the study. >> this data shows that we ought to be thinking differently about patients depending on where their cancer arose. >> reporter: patients with cancer on the right side tend to have fewer early symptoms

are often diagnosed later. one reason -- benign right-sided polyps can be harder to spot during a colonoscopy. many polyps are obvious, like this one that looks like a mushroom. but polyps on the right side tend to be flat, increasing the odds of being missed and eventually turning into cancer. >> when i go to clinic next time, i'm going to be thinking, right side, left side. different treatment. >> reporter: today's study suggested certain types of chemotherapy may be more effective with colon cancer starting on the right side than the left. that may be especially relevant for african-americans who are more likely than whites to have right-sided colon cancer and less likely to survive. >> thanks, jon. an actress may have shown the way to make hollywood's pay gap collapse like a house of cards. that's next.

actress robin wright just revealed she was able to achieve something rare for women in hollywood. here's jericka duncan. >> reporter: for four seasons robin wright has played the calculating wife of kevin spacey in netflix's "house of cards." >> it's not the money i'm upset about. it's that we do things together. >> reporter: this week she took a page right out of her character, claire underwood's book. tuesday night wright told an audience at a rockefeller foundation event just how she negotiated a pay raise. and i was looking at statistics, and claire underwood's character was more popular than his for a period of time in a season. so i capitalized on that moment. and i was like, "you better pay me, or i'm going to go public." and they did. >> reporter: actress patricia arquette raised the i o

inequity at last year's oscars. >> it's our time to have wage equality once and for all and equal rights for women in the united states of america. >> don't you dare forget that. >> reporter: jennifer wlurns talked to charlie rose about making less in the film "american hustle." >> i feel uncomfortable asking for more money. i don't want to seem like a brat. i don't want to seem like all of these things that are only words that are used for women. >> reporter: wright, who has won a golden globe for her role in "house of cards," said gender should not determine value. >> it has to be unacceptable at this stage. >> reporter: a publicist for kevin spacey told us today kevin thinks it's amazing and well deserved. he's honored to be a part of a show that supports equal pay for women. anthony, a spokesperson for netflix says they have no comment regarding wright's statements, but of course she got what she wanted. >> she did. jericka, thanks. in a moment, the real story behind a popular commercial.

we end with a few words and some music about the most popular tv commercial ever. ♪ i'd like to buy the world a home ♪ ♪ and furnish it with love >> reporter: the ad for coca-cola hit the airwaves in 1971, and it wasn't long before the world was singing it. ♪ i'd like to teach >> of course it ran in almost every country of the world that speaks english, and they all understood it. >> reporter: it was the brainchild of adman bill backer, who also told the world coke was the real thing, campbell's soup was good

-- and set off a national debate over miller lite. >> tastes great! >> reporter: stranded in ireland by fog, backer noticed fellow travelers from all over the world, once angry about the delay, suddenly talking happily together as they drank coke. backer grabbed a napkin and jotted down these words. ♪ i'd like to buy the world a coke and keep it company ♪ ♪ because that's the real thing ♪ >> reporter: he put his new lyrics to a melody called "mom, true love and apple pie" by jingle writers roger greenaway and roger cook, then recruited 500 young people from schools and embassies in rome and put them on a hilltop to lip-sync. ♪ i'd like to buy the world a coke ♪ the commercial was so popular a group called the new seekers recorded a new version that became a top 10 hit. ♪ in perfect harmony bill backer died ts

at the age of 89. the final episode of "mad money" had done an ohmm-age to him and his commercial. and that's how one man taught the world to sing. ♪ grow apple trees and honeybees ♪ >> and that's the overnight news for this thursday. 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 york city, i'm anthony mason.

♪ >> announcer: this is the "cbs overnight news." welcome to the "overnight news." while the republican party is slowly coming together behind the presumptive presidential nominee donald trump the democrats continue to battle amongst themselves. hillary clinton and bernie sanders split the primaries tuesday. sanders winning oregon. clinton taking kentucky by less than a point. their fight for delegates is becoming dirty. nancy cordes reports. >> reporter: this is striking because the party has been treating sanders with kid gloves lately, wary of alienating his millions of supporters. but those gloves have come off after an ugly incident in nevada. they say his campaign could have prevented. and they're worried there could be more to come. >> i am getting to like the

coast! [ cheers and applause ] >> reporter: as sanders reveled in his oregon win, the clinton camp celebrate aid photo finish in kentucky, enough to halt a sanders winning streak. "thanks to everyone who turned out," clinton tweeted. "we are always stronger united." but that unity is being tested by a growing dispute over nevada's chaotic democratic convention. it was disrupted for hours this weekend by sanders supporters who were angry about the delegate rules which they felt favored clinton. in a blistering letter monday state party officials accused the sanders campaign of inciting disruption and, yes, violence by an irrational minority. >> they started rushing the stage. >> reporter: roberta lang is the state party chair. >> they stood in front of me and were yelling vile things at me, calling me names. we had chairs thrown at the stage. >> reporter: and the abuse didn't end there. officials say sanders supporters posted her cell phone and home address online. she's gotten hundreds of

>> i would pack your bags right now because the [ bleep ] storm you've ensued is coming. >> reporter: on tuesday the senate's democratic leader who represents nevada says sanders needs to vocally condemn those tactics. >> i'm hopeful and very confident senator sanders will dot right thing. >> reporter: but a defiant sanders faulted nevada's party leadership saying it used its power to prevent a fair and transparent process. officials quickly called that a lie. >> i say to the leadership of the democratic party, open the doors, let the people in! >> reporter: the chair of the democratic national committee said last night sanders is adding fuel to the fire when he could be putting the fire out. very rare to hear her criticize one of her candidates. he picked up just four more delegates than clinton, who now leads him by about 3 million votes. for the republicans donald thump continues to march through

essentially unopposed. trump needs fewer than 80 delegates to clinch the nomination. polls show he's not doing well with woman voters. but one powerful woman is standing up for him. his daughter, ivanka. she sat down with norah o'donnell. >> i'm going to ask you about "the new york times." they ran a front-page article this sunday about your father and the treatment of women. did you read it? >> i did. and i found it to be pretty disturbing based on the facts as i know them. and obviously i very much know them, both in the capacity as a daughter and in the capacity as an executive who's worked alongside of him at this company for over a decade. so i was bothered by it. but it's largely been discredited since. most of the time when stories are inaccurate they're not discredited. and i will be frustrated by that. but in this case i think they went so far, they had such a torong thesis and created facts

and i think that narrative has been playing out now, and there's backlash in that regard. >> i do want to read you from part of the article. it says "many of the women interviewed revealed unwelcome romantic advances, unending commentary on the female form, a shrewd reliance on ambitious women and unsettling workplace conduct." is there unending commentary on the female form? >> no. no. and again, this is an article that is widely being discredited. the lead person who was interviewed for the story and that the story opens up with is all over the news yesterday saying that they manipulated what she was saying. i don't find it that meaningful to comment on this particular story because i think the facts are starting to speak for themselves. >> but you have worked so closely with your dad. there's another woman who is quoted in the article that says that donald trump groped her at a -- you know, at a meeting, at a business meeting. >> look, i'm not in every interactn

but he's not a groper. it's not who he is. and i've known my father obviously my whole life. and he has total respect for women. he was promoting women in development and construction at a time when it was unheard of. there was no trend toward equality in the real estate and construction industry back in the 1980s. and he was doing it because he believes ultimately in merit. >> he's running against a woman. and he has said that he's already using gender as a way to run against her. >> well, is he using gender or is she using gender? i think she's using gender as well. i'm not going to advocate for a female leader who i'm voting for solely on the basis of gender. the people who run yellowstone park are coming under fire for their decision to destroy a baby bison. a park visitor put the bison in the back of his suv, and that started a chain of events that led to the baby's death. mark s

>> reporter: every visitor driving into yellowstone gets a map, a park newspaper, and these safety guidelines against getting too close to wildlife. well, someone apparently forgot to read these. with bison park visitors are told to stay at least 25 yards away. mature bulls can weigh more than a ton and stand six feet tall. but a 69-year-old canadian tourist thought this bison calf looked cold and apparently abandoned, picked it up and turned it over to park rangers. >> once they have the smell of the humans on that calf, you certainly raise the risk that they will not be able to be successfully reunited with their parent. >> reporter: dan wanck is the part support. he told us bison herds later rejected the calf and it began to approach people and cars and become a traffic hazard. >> ultimately that resulted in the destruction of that calf. >> reporter: you described it as misplaced concern. is that the nice way of

>> it is a nice way of describing it. they were wrong. >> reporter: yellow stone is not a petting zoo. this video shows a bison flipping a man who got too close. another video shows a bison charging a boy who crept within feet of it. bison gored five visitors last year. a grizzly killed another visitor. but yellowstone has a pr challenge with the killing of the bison calf, which they defend as necessary but has churned outrage on social media. yellowstone explained that in order to ship the calf out of the park it would have had to go through months of quarantine. in the end a visitor's ill-advised rescue attempt became a death sentence for the calf. a reminder to all visitors to respect wildlife space. >> yellowstone national park is their home. they understand how to live and to succeed and to thrive in this environment. >> reporter: the canadian tourist was given a citation for getting too close to

but park officials say their investigation is continuing and more charges are pending. >> the "cbs overnight news" will be right back. ♪ music ♪ introducing new k-y touch gel crème. for massage and intimacy. every touch, gently intensified. a little touch is all it takes. k-y touch. we're going to prove just how wet and sticky your current gel antiperspirant is. ♪ and now we're going to show you how degree dry spray is different. degree dry spray. goes on instantly dry for a cleaner feel.

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for the past two years "60 minutes" has been following a daring medical experiment. it uses the polio virus to fight a vicious form of brain cancer. well, the results are promising. and the federal government has granted the treatment breakthrough status. that means this new dramatic way of fighting cancer will become more available across the country. here's scott pelley. >> reporter: nancy justice had been sentenced to a bleak prognosis when we met her in october 2014. at age 58 she had recurrent glio blastoma. it had come back after surgery, radiation, and chemotherapy. typically, she could expect to live seven months. the polio virus which mankind had fought

earth was the last chance she had in the world. >> just a tiny tug there. >> reporter: a half teaspoon of pollio flowed through a catheter inserted through nancy's skull directly into her tumor. >> okay. >> read yy to go. >> i'm ready. bring it on. >> we're starting. 9:21. >> if you feel anything, you let us know. >> i will. definitely. >> reporter: her husband greg, constantly inflated a buoyant optimism to save him from the weight of the unknown. >> okay. >> reporter: her glioblastoma was diagnosed in the 21st year of nancy and greg's marriage, just as the georgia couple could make out the finish line for zack and luke at college. her tumor can double in size every two weeks. >> the tumor was aggressive. so you wanted an aggressive treatment. >> yes. yes. >> you're a medical explorer. does it feel that way to you? >> i'm taking it one day a

time. it sounds very lofty to say medical explorer. but you know, throughout all of this if this gives other people hope i'm all for it. >> greg, you mentioned that nancy was there for every important event in the boys' lives, but there are a lot of important events to come. >> exactly. >> what do you hope to see? >> so i am going to see those boys walk across the stage at their college graduation. i am going to see them get married. and i am going to see grandkids. preferably in that order. and i know it's like such a mom bucket list. but i'll love every minute of it. >> the number of calls are increasing again. >> reporter: this is duke's polio team. dr. darryl bigner, director of the tisch brain tumor center. molecular biologist andreas gromeyer and neurobiologist henry friedman and monique desjardins. as is typical, theni

research dollars to the therapy. and all the members of the team are investors. >> good to see this is going well. >> reporter: dr. friedman screens more than 1,000 glioblastoma patients a year who would like to be treated at duke. he helps decide who meets the criteria for the polio trial. i wonder, of all the trials and all of the theories and all of the treatments that you have hoped for all of these years, how does this stack up? >> this to me is the most promising therapy i've seen in my career. period. >> reporter: the virus is the creation of t, the obsession of dr. gromeier who has been laboring over this the last 25 years. the last 15 at duke. >> when you went to your colleagues and said i've got it, we'll use the polio virus to kill cancer, what did they say? >> well, i had a range of responses from

lying to all kinds of things. most of them thought it was just too dangerous. >> i thought he was nuts. i mean, i really thought that what he's using is a weapon that produces paralysis. >> reporter: other researchers are experimenting with cancer treatments using viruses including hiv, smallpox, and measles. but polio was dr. gromeier's choice because as luck would have it it seeks out and attached to a receptor that is found on the surface of the cells that make up nearly every kind of solid tumor. it's almost as if polio had evolved for the purpose. >> here is the genetic material -- >> reporter: gromeier reengineered the virus removing a key genetic sequence. the virus can't survive this way. so he repaired the damage with a harmless bit of cold virus. this new modified polio virus can't cause paralysis or death because it can't

normal cells. but in cancer cells it does. and in the process of replicating it releases toxins that poison the cell. at least that's what they'd observed in the laboratory. eventu eventual eventually they had to try it in a human being. it's a hell of a thing to be told you have months to live when you're 20 years old. in 2011 stephanie lipscomb was a nursing student with headaches. a doctor told her she had this glioblastoma tumor the size of a tennis ball. >> i looked at the nurse that was sitting there holding my hand, and i said, i don't understand. what did he just say? it was kind of hard for me to process. >> you had 98% of the tumor removed. >> exactly. >> as much radiation as you can have in a lifetime. and chemotherapy. >> exactly. >> and then in 2012 what did the doctors tell you? >> your

>> reporter: with recurrent glioblastoma there were no options. except the one that had never been tried. >> did they tell you that it had never been tried in a human being before? >> they did. but at the same time i had nothing to lose honestly. >> reporter: her polio treatment began in 2012. and from the very beginning it looked like a bad bet. >> so we treated her in the may. then in july the tumor looked bigger, looked really inflamed. i got really concerned, got really worried. >> you thought this wasn't working. >> i thought it wasn't working. >> neuro-oncologist monique desjardins wanted to abandon the polio experiment and return to traditional treatment, but stephanie said no. five months after her infusion an mri showed the tumor only looked worse because of inflammation caused by stephanie's immune system, which

the first time and gone to war. >> why didn't the immune system react to the cancer to begin with? cancers, they develop a shield or shroud of protective measures that make them invisible to the immune system. and this is precisely what we tried to reverse with our virus. so by infecting the tumor we are actually removing this protective shield and telling -- enabling the immune system to come in and attack. >> so essentially what's happening here inside the tumor is you have a polio infection. >> yes. >> and that sets off an alarm for the immune system. >> yes. >> the immune system says there's a polio infection, we'd better go kill it. >> exactly. >> and it turns out it's the tumor. >> yes. >> reporter: it appears the polio starts the killing but the immune system does most of the dama

months until it was gone. three years after the infusion something unimaginable had happened. this is from an mri in august 2014. and there's no cancer in this picture at all. >> we don't see any cancer, active cancer cells. >> reporter: she is cancer-free. all that remains is this hole from an early surgery. >> you can see scott's full report on our website, cbsnews.com. the "overnight news" will be right back.

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2016 is shaping up to be the year that virtual reality becomes, well, reality. video game companies, media giants, and hollywood studios are all putting out content. and affordable goggles are now on the market. it's driving vr into the mainstream. john blackstone paid a visit to stanford university, ground zero of the vr revolution. >> reporter: inside this small office at stanford university professor jeremy bailenson has the ability to make your wildest dreams a reality. >> you can grow a third arm. you can travel the world. you can go to the bottom of the ocean. and the possibility to do things that we could only imagine previously is really neat. >> reporter: it's called the virtual human interaction lab, and it's become a must-see for silicon valley titans. like facebook's mark zuckerberg, looking to get into the booming virtual reality market.

like me it begins by putting on the goggles. >> okay. >> do you see that you're in the room? >> i see the room. >> except where am i? am i here? >> you've disappeared. >> reporter: i am suddenly standing in a virtual replica of >> look down. do you see that piece of wood on the floor? >> yeah. >> walk to the right side of it, please. >> reporter: but when i look down -- >> oh, my god. wow. okay. >> reporter: the chasm looks so real my knees are shaking. i know the floor is solid. but part of my brain is shouting don't do it. >> take a step off. >> hard to do. but -- ah! >> good job. good job. virtual reality is not a media experience. when it's done well, it's an actual experience. >> so the impact of doing something with these goggles on is greater than the impact of looking at the same thing on a flat screen on my smartphone? >> in general our

change, causes more engagement, causes more influence than other types of traditional media. >> reporter: over the next 30 minutes i virtually learn new skills. >> wow, that one hurt. >> reporter: like blocking hockey pucks. and training my body to react quickly during an earthquake. >> wow. this is pretty real. >> reporter: but the teaching can also go much deeper. >> i want you to bend down at the knees so you can't see yourself anymore. go all the way down, all the way down. now come up. >> oh. >> oh. that's the reaction we're after. you are now a woman of color. >> reporter: i am suddenly transformed, appearing to have changed both my gender and race. bailenson's research has shown this exercise in empathy can actually change the way people act toward others. >> becoming someone else in virtual reality and experiencing this firsthand in general cause a reduction in prejudice compared to the typical way we try to address this, for example, role playing or mental imagery. >> reporter:

risks. virtual reality is potentially more addictive than video games and smartphones. >> virtual reality is consuming. you put it on, you're there. it's really intense. and you actually feel like you're there. >> reporter: so intense that vr goggles are not recommended for children under 13. and users are encouraged to take breaks every 30 minutes. >> it's a powerful tool. that power of the experience doesn't come for free. >> is this too powerful for people to have freely? >> in the wrong hands technology can be good and it can be bad. uranium can heat homes and it can destroy nations. and virtual reality is a medium. it's up to us to use it for good. >> reporter: bailenson has been studying virtual reality since 1999. this year he is finally seeing it enter the consumer mainstream. >> it's a pretty special time to be doing virtual reality. >> it's not virtually real. it's real. >> it's real. >> whoa. whoa. okay. let's go down here. >> reporter: well, it certainly seems real. john

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finding a new home on earth. a massive fuel tank left over from the shuttle program is about to make the final leg of its journey from new orleans to a los angeles museum. ben tracy reports. >> reporter: this thing is as tall as a 15-story building. so moving it around is not an easy task. and the journey to get here, well, it's been quite the trip. >> and lift-off. >> reporter: every space shuttle mission was propelled by a massive workhorse, a 66,000-pound fuel tank that blasted the shuttle into orbit. >> and separation from the external tank. >> reporter: it would then break off and disintegrate. but when the shuttle program ended, a single fuel tank remained, never having flown. the surviving shuttles all went to

"endeavour" is now parked at the california science center in l.a. >> it's an amazing machine. so we wanted to show the whole thing and help explain how challenging it is to go to orbit. >> reporter: it's one thing to want a fuel tank. it's quite another to get it delivered. et-94, as it's called, was housed at a nasa warehouse in new orleans. an 1,800-mile drive to los angeles. >> this is a little too big to go on a road because it's just too large to go under any bridges or overpasses. >> reporter: so instead the giant fuel tank was loaded onto a barge, sailing through the gulf of mexico and the caribbean sea through the panama canal, up the pacific coast by san diego, and now just outside of l.a. the six-week, 5,000-mile journey cost $3 million. now just 16 miles remain. the tough jeest 16 miles. from the marina to the museum. it's a

one that captivated southern californians 3 1/2 years ago when "endeavour" made one last flyby, then a slow victory lap. [ cheers and applause ] navigating space may have been easier than navigating l.a. streets. the fuel tank will soon get a similar escort. but that's not the ultimate mission. >> it's really to stimulate the next generation of scientists, engineers and explorers. it really represents our hopes and our dreams of exploring the unknown. >> reporter: now, eventually this fuel tank is going to be attached to the space shuttle at the science center. they're then going to rotate both of them 90 degrees so they're sticking upright just like they did in the launchpad. the road trip for the fuel tank begins early saturday morning. and that of course is designed to make sure it does not get stuck in l.a.'s notorious traffic. >> that's the "overnight news" for this thursday. for some of you the news continues. for others check back with us a little later fhe

news" and "cbs this morning." from the broadcast center in new york city, i'm vladimir duthiers. the rift between the clinton and sanders camps grows deeper. >> to suggest that our campaign has anything to do with creating violence is an outrage and unacceptable. also tonight, millions of americans become eligible for overtime pay. an actress demands and gets equal pay. >> and i was like, you better pay me or i'm going to go public. and remembering the man who taught the world to sing. ♪ i'd like to teach the world ♪ to sing ♪ sing with me ♪ in perfect harmony ♪ i'd like to buy the world a coke and keep it company ♪ >> announcer: this is the "cbs overnight news."

the democratic presidential nomination will be a fight to the finish after hillary clinton narrowly won the primary in kentucky yesterday and bernie sanders took oregon. clinton now has 96% of the delegates she needs to clinch. it's nearly impossible for sanders to catch her, but he's not giving up. and the party rift is widening. here's nancy cordes. >> i reject any implication that our campaign supports violence. >> reporter: a defiant sanders told cbs news today that his campaign did not encourage the chaos at nevada's democratic convention over the weekend. >> for democratic leaders in nevada and elsewhere to suggest that our campaign has anything to do with creating violence is an outrage and unacceptable. >> reporter: state party officials have accused the sanders camp of convincing an irrational minority that the proceedings had been rigged against them, which led to a day

of unrest. his supporters later posted the state party chair's number online, and she got hundreds of threats. >> people like you should be hung. >> the crowd was out of control, red in the face. >> reporter: california senator barbara boxer tried to speak but got booed. she's one of several senators who have called their vermont colleague to express concern. >> he was stunned that i felt that my safety was in peril. and i can only hope that as a leader, and he is a leader, that he's taken care of it. >> reporter: the incident has weakened the fragile detente between sanders and party leaders, especially with some sanders supporters already vowing to protest at the national convention in july. >> it's time to move forward. >> reporter: party chair debbie wassern schultz tried to turn the page today. >> was there anything about the rules in nevada that was unfair, that was rigged against the sanders campaign? >> absolutely not. it was eminently fair and run

according to the process that was approved back in 2014. >> reporter: she initially said sanders was fanning the flames of discontent but now tells us she believes he is taking the matter seriously. anthony, party leaders are walking a tightrope here because they know they can't afford to alienate sanders or his millions of supporters. >> nancy, thanks. the presumptive republican nominee signed up for a one-day apprenticeship in foreign affairs run by a noted expert. here's major garrett. >> reporter: donald trump today sought foreign policy advice from former secretary of state henry kissinger. the meeting came after trump said that he would negotiate directly with north korean leader kim jong un over his country's nuclear weapons program. that would be a sharp departure from decades of u.s. foreign policy. trump has also said he would let japan and south korea develop their own nuclear weapons. >> wouldn't you rather, in a certain sense, have japan have nuclear weapons when north korea has nuclear weapons? >>or

relations committee cautioned against the proposals. >> it's one thing to sit down and talk. what do you do after that? and if it's, you know, tell south korea and japan they're on their own, that's a dangerous position. >> reporter: trump's unorthodox ideas for diplomacy extend not just to america's enemies but also to long-time allies. he's called the nato alliance obsolete and said european members need to contribute more. >> if it breaks up nato, it breaks up nato. >> reporter: even the bedrock special relationship with great britain is up for debate after british prime minister david cameron criticized trump's call for a temporary ban on muslim immigration. >> it looks like we're not going to have a very good relationship. who knows? i hope to have a good relationship with him. but it sounds like he's not willing to address the problem, either. >> reporter: trump's meeting with kissinger was designed to calm some of the criticism of his ideas. >> it's a good sign that he's sitting down with foreign policy experts. and whether he'll have the same position next week as he seems to be developing now, we just don't know.

>> major, trump also released a list today of people he'd consider for openings on the supreme court. what can you tell us about that? >> reporter: 11 names all drawn from the federal or state bench. conservatives reacted favorably. interestingly, one judge on the list, texas supreme court justice don willet, has been openly critical of trump. he tweeted this haiku the day trump announced. "who would the donald name to scotus? the mind reels, weeps. can't finish tweet." >> nice reading, major, thanks. a lot of folks are already fed up with this election when a virginia woman died this week her family posted this notice in the "richmond times-dispatch." "faced with the prospect of voting for either donald trump or hillary clinton, mary anne noland of richmond chose instead to pass into the eternal love of god. facebook held a summit of conservative leaders today to address allegations that the world's leading socialia

left. here's john blackstone. >> reporter: at facebook headquarters ceo mark zuckerberg is meeting as many as 15 leading conservatives today, including former republican setor jim demint. barry bennett, a senior trump adviser, and commentator glenn beck. >> i just want to listen. i want to look mark zuckerberg in the eye and get a gauge of him as a man and see, is he telling the truth? >> reporter: zuckerberg says he called the meeting to have a direct conversation about what facebook stands for. it's a response to accusations made on the tech news site gizmodo by anonymous former facebook workers. they claim editors of the website's trending section routinely blocked conservative issues. zuckerberg wrote, "we have found no evidence that this report is true." but matt schlapp of the american conservative union says he cl

organization in the past. >> when we went to facebook and said, would you work with us, would you show us how to use facebook better, would you help us get our conservative message out, they were not very interested in assisting us. >> facebook hasn't done anything wrong. >> reporter: attorney david green, who defends civil liberties at the electronic frontier foundation, sees the facebook meeting as evidence the first amendment is alive and well on the internet. >> i think it's actually a really nice model for the way, you know, free speech works in our country. they have the right to make these editorial decisions and other people have the right to call them on them and say we don't like it. >> reporter: in spite of their big thumbs up sign, anthony, facebook gave a thumbs down to allowing reporters into today's meeting. >> john blackstone. thanks, john. the "cbs overnight news" will be right back.

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it was 62 years ago this week that the supreme court outlawed segregation in public schools. but it never went away. a study ordered by congress found the percentage of high-poverty schools with mostly black or hispanic students has more than doubled since 2000. michelle miller went to a district in the deep south that's been ordered to desegregate. >> reporter: the mississippi delta town of cleveland has been grappling with its segregated past for 50 years, and now its time has run out. in a ruling, a federal judge ordered the district to merge two high schools and two middle schools, saying "the delay in desegregation has deprived generations of students of the consti

right of an integrated education." jamie jacks, the school district's attorney, says the order doesn't give the full picture. >> we have kids learning side by side each other of different races. if you travel to our surrounding communities here, you'll see that doesn't exist. but we have it here. >> reporter: the problem centers around cleveland's two high schools. cleveland high is an historically whites-only school and is now evenly split. but east side high still has a student body that is virtually 100% african-american. students we spoke to fear the impending change. >> it's this side of the highway versus that side of the highway. it's been a rival for a long time. >> reporter: margaret schwartzbaker's kids go to cleveland high. reverend edward duval's to east side. >> i think the white are afraid to become a minority and lose control. >> but i think it's maybe time

to move forward i think as one unified school where everybody can accelerate. >> reporter: school desegregation protests across the country are part of an ugly past. and the fight continues in the courts. there are currently 177 active school desegregation cases. half in mississippi and alabama alone. deputy assistant attorney general vinita gupta heads the justice department's civil rights division. >> i do think it's jarring to people to know that in fact still many of our schools remain segregated and that that is something we need to change. >> reporter: here the debate is how to make the change. michelle miller, cbs news, cleveland, mississippi. more than 4 million american workers will soon become eligible for overtime pay under new rules issued today by the obama administration. but will they end up with more money or fewer hours? don dahler takes a look. >> please, table 10. >> wonderful. >> thanks.

>> reporter: with the lunch rush fading in his manhattan restaurant, owner james mallios has a chance to catch up with some of his employees. he says the new overtime policy is overdue. >> when workers are well paid, they're more productive at work. >> reporter: currently only salaried workers making less than $23,660 are eligible for overtime pay. the new policy raises that threshold to $47,476. affecting some 4.2 million people. >> what are you going to do for them to comply with this? >> there are four employees who are impacted by this decision, and we will be raising their salaries to comply with the new requirements. >> reporter: in restaurants, retail stores, and other small businesses employees designated as managers often work up to 80 hours a week but did not qualify for overtime. in ohio today vice president joe biden promoted the new rules. >> when you're deprived your dignity, in my view, when you know you're working much, much harder and much, much longer than you're getting compensated for.

>> reporter: but critics of the plan warn it could backfire. david french of the national retail federation calls it a career killer. >> but in the real world most employees probably won't see overtime. instead their jobs are going to be changed and they'll be reclassified. they'll effectively be demoted from a salaried position where they're exempt to an hourly position where they're non-exempt. >> reporter: to placate businesses bonuses will be considered salary income. anthony, the policy won't take effect until december. >> don dahler. thanks, don. the pentagon says two chinese fighter jets flew within 50 feet of a u.s. navy reconnaissance plane yesterday in international air space over the south china sea. the american pilot called it an unsafe intercept and descended quickly to avoid a collision. for more than two years the

world's demanded that nigeria's government bring home more than 200 girls kidnapped from their school by the muslim terror group boko haram. today debora patta reports one was found, not by the military but local residents. >> reporter: she was number 127 of the kidnapped school girls. amina ali and her four-month-old baby were found today near the sambisa forest where she was collecting firewood. she was with this man, identified as her husband and a boko haram soldier. the girls were violently snatched from their school two years ago. since then the nigerian government has been unable to free the girls or even find them. the kidnapping sparked global outrage and a campaign called "bring back our girls." ♪ which only intensified when the extremist group released video claiming to show its christian victims converting to islam. but despite the worldwide attention, the trail went cold until last month when a new video surfacedpe

show at least 15 of the chibok girls were still alive. for despairing parents it rekindled hopes of seeing their daughters again. ali's survival will only fuel those hopes. with little else known, ali's baby may be the most important detail to emerge today. it's a familiar story. isha mousa, whom we met recently in a refugee camp, was also forced to marry her boko haram captor and gave birth to his child. traumatized and stigmatized by her community, mousa's child has branded her spoiled goods and only prolonged her ordeal. amina ali has been reunited with her mother and is being debriefed by the nigerian military. it's hoped she will be able to provide some intelligence on boko haram and the other girls still being held. >> debora patta in johannesburg. thanks, debora. a new study says surviving colon cancer may depend on where the tumor is located.

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for better results, use finish jet-dry. a study out today helps answer a question that has troubled oncologists. why do some patients with colon cancer survive longer than others? here's dr. jon lapook.

>> reporter: two years ago at age 48 lisa glassco had surgery for what was thought to be early-stage colon cancer. >> it had actually spread across my body. so at that point they staged it stage 4 colon cancer, not in the terminal sense but in the fact that it had moved. >> reporter: she had six months of chemotherapy, but earlier this year the cancer returned, prompting another round. >> today's the halfway through mark. the side effects are hitting me a little bit harder than they did last year. >> reporter: her cancer had started on the right side of the colon, a location that can be more deadly. today's study of patients with advanced colon cancer found those with tumors on the right side survived an average of 19 months compared to 33 months for those with tumors on the left side. dr. richard goldberg is an oncologist with the ohio state university comprehensive cancer center and is a co-author of the study. >> this data shows that we ought to be thinking differently about patients depending on where their cancer arose. >> reporter: patients with

cancer on the right side tend to have fewer early symptoms and are often diagnosed later. one reason -- benign right-sided polyps can be harder to spot during a colonoscopy. many polyps are obvious, like this one that looks like a mushroom. but polyps on the right side tend to be flat, increasing the odds of being missed and eventually turning into cancer. >> when i go to clinic next time, i'm going to be thinking, right side, left side. different treatment. >> reporter: today's study suggested certain types of chemotherapy may be more effective with colon cancer starting on the right side than the left. that may be especially relevant for african-americans who are more likely than whites to have right-sided colon cancer and less likely to survive. >> thanks, jon. an actress may have shown the way to make hollywood's pay gap collapse like a house of cards. that's next.

actress robin wright just revealed she was able to achieve something rare for women in hollywood. here's jericka duncan. >> reporter: for four seasons robin wright has played the calculating wife of kevin spacey in netflix's "house of cards." >> it's not the money i'm upset about. it's that we do things together. >> reporter: this week she took a page right out of her character, claire underwood's book. tuesday night wright told an audience at a rockefeller foundation event just how she negotiated a pay raise. and i was looking at statistics, and claire underwood's character was more popular than his for a period of time in a season. so i capitalized on that moment. and i was like, "you better pay me, or i'm going to go public." and they did. >> reporter: actress patricia arquette raised the issue of pay inequity at last year's oscars.

>> it's our time to have wage equality once and for all and equal rights for women in the united states of america. >> don't you dare forget that. >> reporter: jennifer wlurns talked to charlie rose about making less in the film "american hustle." >> i feel uncomfortable asking for more money. i don't want to seem like a brat. i don't want to seem like all of these things that are only words that are used for women. >> reporter: wright, who has won a golden globe for her role in "house of cards," said gender should not determine value. >> it has to be unacceptable at this stage. >> reporter: a publicist for kevin spacey told us today kevin thinks it's amazing and well deserved. he's honored to be a part of a show that supports equal pay for women. anthony, a spokesperson for netflix says they have no comment regarding wright's statements, but of course she got what she wanted. >> she did. jericka, thanks. in a moment, the real story behind a popular commercial.

we end with a few words and some music about the most popular tv commercial ever. ♪ i'd like to buy the world a home ♪ ♪ and furnish it with love >> reporter: the ad for coca-cola hit the airwaves in 1971, and it wasn't long before the world was singing it. ♪ i'd like to teach >> of course it ran in almost every country of the world that speaks english, and they all understood it. >> reporter: it was the brainchild of ad man bill backer, who also told the world coke was the real thing, campbell's soup was good food -- ♪ soup is good food -- and set off a national debate

>> tastes great! >> less filling! >> reporter: stranded in ireland by fog, backer noticed fellow travelers from all over the world, once angry about the delay, suddenly talking happily together as they drank coke. backer grabbed a napkin and jotted down these words. ♪ i'd like to buy the world a coke and keep it company ♪ ♪ because that's the real thing ♪ >> reporter: he put his new lyrics to a melody called "mom, true love and apple pie" by jingle writers roger greenaway and roger cook, then recruited 500 young people from schools and embassies in rome and put them on a hilltop to lip-sync. ♪ i'd like to buy the world a coke ♪ the commercial was so popular a group called the new seekers recorded a new version that became a top 10 hit.

bill backer died this past week at the age of 89. the final episode of "mad money" had done an ohmm-age to him and his commercial. and that's how one man taught the world to sing. ♪ grow apple trees and honeybees ♪ >> and that's the overnight news for this thursday. 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 york city, i'm anthony mason.

♪ >> announcer: this is the "cbs overnight news." welcome to the "overnight news." i'm vladimir duthiers. while the republican party is slowly coming together behind the presumptive presidential nominee donald trump the democrats continue to battle amongst themselves. hillary clinton and bernie sanders split the primaries tuesday. sanders winning oregon and clinton taking kentucky by less than a point. their fight for delegates is becoming dirty. nancy cordes reports. >> reporter: this is striking because the party has been kind of treating sanders with kid gloves lately, wary of alienating his millions of supporters. but those gloves have come off after an ugly incident in nevada. they say his campaign could have prevented. and they're worried there could be more to come. >> i am getting to like the west coast!

>> reporter: as sanders reveled in his oregon win, the clinton camp celebrated a photo finish in kentucky, enough to halt a sanders winning streak. "thanks to everyone who turned out," clinton tweeted. "we are always stronger united." but that unity is being tested by a growing dispute over nevada's chaotic democratic convention. it was disrupted for hours this weekend by sanders supporters who were angry about the delegate rules which they felt favored clinton. in a blistering letter monday state party officials accused the sanders campaign of inciting disruption and, yes, violence by an irrational minority. >> they started rushing the stage. >> reporter: roberta lang is the state party chair. >> they stood in front of me and were yelling vile things at me, calling me names. we had chairs thrown at the stage. >> reporter: and the abuse didn't end there. officials say sanders supporters posted her cell phone and home address online. she's gotten hundreds of thre

>> i would pack your bags right now because the [ bleep ] storm you've ensued is coming. >> reporter: on tuesday the senate's democratic leader who represents nevada says sanders needs to vocally condemn those tactics. >> i'm hopeful and very confident senator sanders will do the right thing. >> reporter: but a defiant sanders faulted nevada's party leadership saying it used its power to prevent a fair and transparent process. officials quickly called that a lie. >> i say to the leadership of the democratic party, open the doors, let the people in! >> reporter: the chair of the democratic national committee said last night sanders is adding fuel to the fire when he could be putting the fire out. very rare to hear her criticize one of her candidates. he picked up just four more delegates than clinton, who now leads him by about 3 million votes. for the republicans donald trump continues toar

the primaries, running essentially unopposed. trump needs fewer than 80 delegates to clinch the nomination. polls show he's not doing well with women voters. but one powerful woman is standing up for him. his daughter, ivanka. she sat down with norah o'donnell. >> i'm going to ask you about "the new york times." they ran a front-page article this sunday about your father and the treatment of women. did you read it? >> i did. and i found it to be pretty disturbing based on the facts as i know them. and obviously i very much know them, both in the capacity as a daughter and in the capacity as an executive who's worked alongside of him at this company for over a decade. so i was bothered by it. but it's largely been discredited since. most of the time when stories are inaccurate they're not discredited. and i will be frustrated by that. but in this case i think they went so far, they had such a strong thesis and created facts to reinforce it.

been playing out now, and there's backlash in that regard. >> i do want to read you from part of the article. it says many of the women interviewed "revealed unwelcome romantic advances, unending commentary on the female form, a shrewd reliance on ambitious women and unsettling workplace conduct." is there unending commentary on the female form? >> no. no. and again, this is an article that is widely being discredited. the lead person who was interviewed for the story and that the story opens up with is all over the news yesterday saying that they manipulated what she was saying. i don't find it that meaningful to comment on this particular story because i think the facts are starting to speak for themselves. >> but you have worked so closely with your dad. there's another woman who is quoted in the article that says that donald trump groped her at a -- you know, at a meeting, at a business meeting. >> yeah. well -- look, i'm not in eve

but he's not a groper. it's not who he is. and i've known my father obviously my whole life. and he has total respect for women. he was promoting women in development and construction at a time when it was unheard of. there was no trend toward equality in the real estate and construction industry back in the 1980s. and he was doing it because he believes ultimately in merit. >> he's running against a woman. and he has said that he's already using gender as a way to run against her. >> well, is he using gender or is she using gender? i think she's using gender as well. i'm not going to advocate for a female leader who i'm voting for solely on the basis of gender. the people who run yellowstone park are coming under fire for their decision to destroy a baby bison. a park visitor put the bison in the back of his suv, and that

led to the baby's death. mark strassmann has the story. >> reporter: every visitor driving into yellowstone gets a map, a park newspaper, and these safety guidelines against getting too close to wildlife. well, someone apparently forgot to read these. with bison park visitors are told to stay at least 25 yards away. mature bulls can weigh more than a ton and stand six feet tall. but a 69-year-old canadian tourist thought this bison calf looked cold and apparently abandoned, picked it up and turned it over to park rangers. >> once they have the smell of the humans on that calf, you certainly raise the risk that they will not be able to be successfully reunited with their parent. >> reporter: dan wanck is the part support. he told us bison herds later rejected the calf and it began

become a traffic hazard. >> ultimately that resulted in the destruction of that calf. >> reporter: you described it as misplaced concern. is that the nice way of describing it? >> it is a nice way of describing it. they were wrong. >> reporter: yellowstone is not a petting zoo. this video shows a bison flipping a man who got too close. another video shows a bison charging a boy who crept within feet of it. bison gored five visitors last year. a grizzly killed another visitor. but yellowstone has a pr challenge with the killing of the bison calf, which they defend as necessary but has churned outrage on social media. yellowstone explained that in order to ship the calf out of the park it would have had to go through months of quarantine. in the end a visitor's ill-advised rescue attempt became a death sentence for the calf. a reminder to all visitors to respect wildlife space. >> yellowstone national park is their home. they understand how to live and to succeed and to thrive in this environment. >> reporter: the canadian tourist was given a citation for getting too close to wildlife and fined $110. pa

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cascade. for the past two years "60 minutes" has been following a daring medical experiment. it uses the polio virus to fight a vicious form of brain cancer. well, the results are promising. and the federal government has granted the treatment breakthrough status. that means this new dramatic way of fighting cancer will become more available across the country. here's scott pelley. >> reporter: nancy justice had been sentenced to a bleak prognosis when we met her in october 2014. at age 58 she had recurrent glioblastoma. it had come back after surgery, radiation, and chemotherapy. typically, she could expect to live seven months. the polio virus which mankind

earth was the last chance she had in the world. >> just a tiny tug there. >> reporter: a half teaspoon of pollio flowed through a catheter inserted through nancy's skull directly into her tumor. >> okay. >> ready to go. >> i'm ready. bring it on. >> we're starting. 9:21. >> if you feel anything, you let us know. >> i will. definitely. >> reporter: her husband, greg, constantly inflated a buoyant optimism to save him from the weight of the unknown. >> okay. >> reporter: her glioblastoma was diagnosed in the 21st year of nancy and greg's marriage, just as the georgia couple could make out the finish line for zack and luke at college. her tumor can double in size every two weeks. >> the tumor was aggressive. so you wanted an aggressive treatment. >> yes. yes. >> you're a medical explorer. does it feel that way to you? >> i'm taking it one day at a time.

it sounds very lofty to say medical explorer. but you know, throughout all of this if this gives other people hope i'm all for it. >> greg, you mentioned that nancy was there for every important event in the boys' lives, but there are a lot of important events to come. >> exactly. >> what do you hope to see? >> so i am going to see those boys walk across the stage at their college graduation. i am going to see them get married. and i am going to see grandkids. preferably in that order. and i know it's like such a mom bucket list. but i'll love every minute of it. >> the number of calls are increasing again. >> reporter: this is duke's polio team. dr. darryl bigner, director of the tisch brain tumor center. molecular biologist andreas q gromeier and

monique desjardins. as is typical, the university has licensed this technology to a new company to attract research dollars to the therapy. and all the members of the team are investors. >> good to see this is going well. >> reporter: dr. friedman screens more than 1,000 glioblastoma patients a year who would like to be treated at duke. he helps decide who meets the criteria for the polio trial. i wonder, of all the trials and all of the theories and all of the treatments that you have hoped for all of these years, how does this stack up? >> this to me is the most promising therapy i've seen in my career. period. >> reporter: the virus is the creation of, the obsession of dr. gromeier who has been laboring over this the last 25 years. the last 15 at duke. >> when you went to your colleagues and said i've got it, we'll use the polio virus to kill cancer, what did they say? >> well, i had a range of responses from c t

lying to all kinds of things. most of them thought it was just too dangerous. >> i thought he was nuts. i mean, i really thought that what he's using is a weapon that produces paralysis. >> reporter: other researchers are experimenting with cancer treatments using viruses including hiv, smallpox, and measles. but polio was dr. gromeier's choice because as luck would have it it seeks out and attaches to a receptor that is found on the surface of the cells that make up nearly every kind of solid tumor. it's almost as if polio had evolved for the purpose. >> here is the genetic material -- >> reporter: gromeier reengineered the virus removing a key genetic sequence. the virus can't survive this way. so he repaired the damage with a harmless bit of cold virus. this new modified polio virus can't cause paralysis or death because it can't reproduce in normal cells.

but in cancer cells it does. and in the process of replicating it releases toxins that poison the cell. at least that's what they'd observed in the laboratory. eventually they had to try it in a human being. it's a hell of a thing to be told you have months to live when you're 20 years old. in 2011 stephanie lipscomb was a nursing student with headaches. a doctor told her she had this glioblastoma tumor the size of a tennis ball. >> i looked at the nurse that was sitting there holding my hand, and i said, "i don't understand. what did he just say?" it was kind of hard for me to process. >> you had 98% of the tumor removed. >> exactly. >> as much radiation as you can have in a lifetime. and chemotherapy. >> exactly. >> and then in 2012 what did the doctors tell you? >> your cancer's back.

glioblastoma there were no options. except the one that had never been tried. >> did they tell you that it had never been tried in a human being before? >> they did. but at the same time i had nothing to lose honestly. >> reporter: her polio treatment began in 2012. and from the very beginning it looked like a bad bet. >> so we treated her in the may. then in july the tumor looked bigger, looked really inflamed. i got really concerned, got really worried. >> you thought this wasn't >> i thought it wasn't working. >> neuro-oncologist monique desjardins wanted to abandon the polio experiment and return to traditional treatment, but stephanie said no. five months after her infusion an mri showed the tumor only looked worse because of inflammation caused by stephanie's immune system, which

had awakened to the cancer for the first time and gone to war. >> why didn't the immune system react to the cancer to begin with? >> so cancers, all human cancers, they develop a shield or shroud of protective measures that make them invisible to the immune system. and this is precisely what we tried to reverse with our virus. so by infecting the tumor we are actually removing this protective shield and telling -- enabling the immune system to come in and attack. >> so essentially what's happening here inside the tumor is you have a polio infection. >> yes. >> and that sets off an alarm for the immune system. >> yes. >> the immune system says there's a polio infection, we'd better go kill it. >> exactly. >> and it turns out it's the tumor. >> yes. >> reporter: it appears the polio starts the killing but the immune system does most of the damage. stephanie's tumor shrank for 21

three years after the infusion something unimaginable had happened. this is from an mri in august 2014. and there's no cancer in this picture at all. >> we don't see any cancer, active cancer cells. >> reporter: she is cancer-free. all that remains is this hole from an early surgery. >> you can see scott's full report on our website, cbsnews.com. the "overnight news" will be right back. just gotta get the check. almost there. i can't reach it. if you have alligator arms, you avoid picking up the check. what? it's what you do. i got this. thanks, dennis! if you want to save fifteen percent or more on car insurance, you switch to geico. growwwlph. it's what you do. oh that is good crispy duck. (babies crying) narrator: life. dishes. death. (slurping)

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2016 is shaping up to be the year that virtual reality becomes, well, reality. video game companies, media giants, and hollywood studios are all putting out content. and affordable goggles are now on the market. it's driving vr into the mainstream. john blackstone paid a visit to stanford university, ground zero of the vr revolution. >> reporter: inside this small office at stanford university professor jeremy bailenson has the ability to make your wildest dreams a reality. >> you can grow a third arm. you can travel the world. you can go to the bottom of the ocean. and the possibility to do things that we could only imagine previously is really neat. >> reporter: it's called the virtual human interaction lab,

and it's become a must-see for silicon valley titans. like facebook's mark zuckerberg, looking to get into the booming virtual reality market. >> seems okay. >> reporter: for test subjects like me it begins by putting on the goggles. >> okay. >> do you see that you're in the room? >> i see the room. >> except where am i? am i here? >> you've disappeared. >> reporter: i am suddenly standing in a virtual replica of bailenson's lab. >> look down. do you see that piece of wood on the floor? >> yeah. >> walk to the right side of it, please. >> reporter: but when i look down -- >> oh, my god. wow. okay. >> reporter: the chasm looks so real my knees are shaking. i know the floor is solid. but part of my brain is shouting don't do it. >> take a step off. >> hard to do. but -- ah! >> good job. good job. virtual reality is not a media experience. when it's done well, it's an actual experience. >> so the impact of doing something with these goggles on

is greater than the impact of looking at the same thing on a flat screen on my smartphone? >> in general our findings show that vr causes more behavior change, causes more engagement, causes more influence than other types of traditional media. >> reporter: over the next 30 minutes i virtually learn new skills. >> wow, that one hurt. >> reporter: like blocking hockey pucks. and training my body to react quickly during an earthquake. >> wow. this is pretty real. >> reporter: but the teaching can also go much deeper. >> i want you to bend down at the knees so you can't see yourself anymore. go all the way down, all the way down. now come up. >> oh. >> oh. that's the reaction we're after. you are now a woman of color. >> reporter: i am suddenly transformed, appearing to have changed both my gender and race. bailenson's research has shown this exercise in empathy can actually change the way people act toward others. >> becoming someone else in virtual reality and experiencing this firsthand in general cause a reduction in prejudice compared to the typical way we try to address this, for example, role playing or mental imagery.

risks. virtual reality is potentially more addictive than video games and smartphones. >> virtual reality is consuming. you put it on, you're there. it's really intense. and you actually feel like you're there. >> reporter: so intense that vr goggles are not recommended for children under 13. and users are encouraged to take breaks every 30 minutes. >> it's a powerful tool. that power of the experience doesn't come for free. >> is this too powerful for people to have freely? >> in the wrong hands technology can be good and it can be bad. uranium can heat homes and it can destroy nations. and virtual reality is a medium. it's up to us to use it for good. >> reporter: bailenson has been studying virtual reality since 1999. this year he is finally seeing it enter the consumer mainstream. >> it's a pretty special time to be doing virtual reality. >> it's not virtually real. it's real. >> it's real. >> whoa. whoa. okay. let's go down here. >> reporter: well, i

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captioning funded by cbs it's thursday, may 19th, 2016. this is the "cbs morning news." breaking news. an egyptair flight disappears from radar over the mediterranean sea en route from paris to cairo with 66 people on board. good morning from the studio 57 newsroom at cbs news headquarters here in new york. good to be with you. i'm anne-marie green. we begin this morning with breaking news. another commercial airliner has vanished from the sky. egyptair flight 804 was