Breakthrough status by the food and drug administration. Results in early tests at Duke University have been so remarkable the f. D. A. Wants to fast track the therapy to more patients. The treatment is audacious using the polio virus to kill glioblastoma, a vicious brain cancer that can kill in matter of months. For two years 60 minutes has been following the patients in the Clinical Trial. Its a hell of a thing to be told you have months to live when youre 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. You had 98 of the tumor removed. Exactly. Pelley and then in 2012, what did the doctors tell you . Your cancer is back. Pelley with recurrent glioblastoma, there were no options except the one that had stephanie became the first volunteer for dukes experiment with the polio virus. The virus is the creation of molecular biologist matthias gromeier. Gromeier reengineered the virus, removing a key genetic sequence. The virus cant survive this way, so he repaired the damage with a harmless bit of cold virus. This new not find polio virus cant cause paralysis or death because it cant reproduce in normal cells, but in cancer cells, it does, and in the process of replicating, it releases toxins that poison the cell. This process also awakens the immune system to the cancer that it had never noticed before. Why didnt the immune system react to the cancer to begin with . Well, all human cancers, they develop a shield, a shroud of protective measure them invisible to the immune system, and this is precisely what we try to reverse with our virus. So by infecting the tumor, we are actually removing the protective shield and telling. Enabling the immune system to come in and attack. Pelley it appears the polio starts the killing, but the immune system does most of the damage. Stephanie lipscombs tumor shrank for 21 months until it was gone. Three years after the infusion, something unimaginable had happened. This is from an m. R. I. In august 2014. And theres no cancer in this picture at all . We dont see any active cancer cells. Pelley all you could see in that picture was an old surgical scar. As is typical, duke started a company to attract Research Dollars to the therapy, and gromeier is an investor. The f. D. A. Granted Breakthrough Status this week showed that patients who had been living ten months were now living 15 months, and three patients are cancerfree after three years. See our full story this sunday on 60 minutes. Also on 60 minutes, a newsmaking investigation of doping by russian athletes, including some who won gold at the winter olympics. Tonight Armen Keteyian has learned more about this russian operation. Reporter the International OlympicCommittee Said today its considering retesting blood and urine samples from this nowtainted russian lab at the 2014 winter games in sochi. But based upon what we have learned from the labs former director, any positive drug tests disappeared a long time ago. Dr. Grigory rodchenkov detailed systematic coverups in with vitaly stepanov. The whistleblower allowed us to listen to 15 hours of conversation he secretly reported with rodchenkov. He had the ability to help to get the necessary results. Reporter and those necessary results were gold medals . Yes. Reporter in the recordings, rodchenkov named russian gold medalists in three sports, bobsled, skeleton and Cross Country skiing, whose dirty drug tests he helped cover up, all part, he said, of an elaborate scream to protect russias olympic Medal Winners with the help of the countrys Intelligence Service known as the f. S. B. What did he tell you about the f. S. B. . That f. S. B. Tried to control every single step of the antidoping process in sochi. Reporter the f. S. B. Figured out a way to open proof, containing urine fm drugtainted athletes. They then filled the bottles with clean urine collected from the athletes before they started doping. Rodchenkov said he then had two weeks after the sochi games to make sure, in his words, people turned out to be clean before test samples were sent to the International Olympic committee in switzerland for storage. But we have also learned today a recent review of blood tests in at least one Olympic Event at sochi has revealed evidence of test tampering, scott, involving russian athletes. Pelley could have an impact in russia in the summer olympics coming up, as well. Thank you very much, armen. Youre welcome. Pelley in campaign 2016, the top two Republican Leaders in america, donald trump and paul ryan, had their long awaited peace summit today. A search for Common Ground in a deeply divided party. Heres Major Garrett. Reporter Donald Trumps whirlwind unity tour through washingtons republican establishment drew hordes of reporters, a and a share of boisterous protesters. Stop the hate stop the hate. Reporter uncharacteristically, trump skipped the publicity bonanza and let twitter do the talking. Things working out really well, he wrote. He has a very good personality. Hes a very warm and genuine person. Reporter House Speaker paul ryan called the 45minute meeting with the presumptive nominee encouraging but admitting they have their differences on policy, include trumps call to oppose pending free trade deals and heave medicare and Social Security intact. Arent you papering over these rather sizeable differences in not only how conservatism is defined broadly but how you have tried to define it . I represent a wing of the conservative party, you could say. He is bringing a whole new wing it to. Hes bringing new voters that weve never had for decades. Thats a positive thing. Reporter ryeon would not say if or when he would endor we just began the process. Im very encouraged at the first meeting of this process. Reporter rnc chairman Reince Priebus brokered the meeting. Why is unity a process . Why doesnt it just exist naturally . Its a big party. Theres a lot of differences in opinion. The other thing id say is i dont think we all expected this thing to be over last week. People had the Start Talking and making decisions. Reporter and come to the realization that trump is it, whether theyre comfortable or not. Suddenly being faced with, lets go, lets rally, it will take some people longer than others, but i think well get there. Reporter trump also met with Mitch Mcconnell and his leadership team. Scott, most of these conversations were political, specifically what Trumps Campaign would mean to republicans seeking reelection, and were told he impressed many lawmakers because he spent most of the time listening. Pelley Major Garrett for us tonight. Major, thank you. Well, the next president , whoever it is, will inherit the unending war in iraq. Today isis suicide bombers soldiers outside the city of ramadi. U. S. Troops have been training the iraqi army for 13 years. It has cost american taxpayers nearly 30 billion, and there is no end in sight. Charlie dagata saw some of that firsthand. [gunfire] reporter on the outskirts of baghdad, iraqi army recruits took aim at an imaginary enemy. But for u. S. Trainer Sergeant First Class josh mcspadden, its all too real. I fought in it in iraq first time. [gunfire] reporter hes been here before, during the worst of the fighting in 2004, and he remembers in vivid detail the day he thought he was going to die. It was the only die in my life that i ever thought i wasnt going to make it home alive, but it was just so, so intense. Reporter whats it like to have fought so fiercely and now youre back again . Its frustrating. Brothers in arms, you know, the iraqi people, you want to see them have the same motivation. You want to see them fight the same way that you do. Just to come back here and face the same problems, you know, its just like, when is enough going to be enough. Reporter he doesnt have a lot to work with, a rusty russian tank and handful of armored personnel carriers. Theres not enough ammunition to practice with the big guns. Well, theyre not much, but theyll be vital in any ground offensive iraqi forces launch against isis. And its no exaggeration to say that some of the recruits are far younger than the tanks theyll be firing. Yesterdays strike on the iraqi capital was the worst bloodshed the city has seen this year. Mcspadden says that only strengthens the resolve of his new recruits. Theyre very motivated, you know, especially with the attack that happened in baghdad. It angers them. They want to take their city back over. That training may have looked rather basic, scott, but those tanks and armored personnel carriers play a vital role in any ground offensive. And that equipment was not just for training. Its the same kind used by iraqi forces against isis on the battlefield. Pelley Charlie Dagata in baghdad tonight. Charlie, thanks. Two state troopers from New Hampshire and massachusetts were placed on leave today after apparently beating a man at the end of a highspeed chase. The suspect appears to surrender, getting out of the vehicle on his knees, and then the Police Officers pummel him. The man, wanted on assault charges, had a swollen eye in court today. The nine millimeter pistol that George Zimmerman used to kill Trayvon Martin is up for sale. The former neighborhood watchman claimed he shot the unarmed teenager in selfdefense. He was found not guilty of murder. Zimmerman wants to do with the money. Reporter on gunbroker. Com, an auction web site, zimmerman opened the bidding at 5,000. He described the weapon as an american firearm icon and a piece of american history. He talked about the sale by phone with television station wofl. What i decided to do is not cower. Im a free american. I can do what id like with my possessions. Reporter but as the bidding opened, gun broker, a user generated site, removed the posting, saying, we want no part in the listing on our web site. Hours later zimmerman relaunched the auction on another site, united gun group. Trayvon martins parents still view zimmermans gun as the murder weapon. Lawyer ben crump represents them. How could you possibly try to make money off of the killing of their whil put your hands up get away from the car reporter controversy has dogged zimmerman since his acquittal in 2013. He has had eight runins with police. Among them new york september 2013, police questioned him for pointing a gun at his wife and fatherinlaw. Two months later he was arrested for aggravated assault against his thengirlfriend. The charges were dropped inch a 2015 road rage incident, zimmermans truck was hit by gunfire, and the other man was charged with attempted seconddegree murder. Last year zimmerman was arrested for throwing a wine bottle at his girlfriend. And now the gun auction, which critics on social media blasted as obscene and disgusting. Theyre not going to be bidding on it, so i couldnt care less about them. Reporter zimmerman has said hell spend the money he makes from the gun auction on vary use causes that matter to him. Scott, he specifically named preventing violence against police in the black lives matter movement. Pelley mark strassmann, thanks very much. Store sales are slumping. Is it time to reinvent the mall . And the pentagon recruits a few good nerds when the cbs evening news. Allergies distracting you . When your symptoms start. Doctors recommend taking. Nondrowsy claritin every day of your allergy season. Claritin provides powerful, nondrowsy 24 hour relief. For fewer interruptions from the Amazing Things you do every day. Live claritin clear. They keep telling me drink more water. Exercise more. I know that. Try laxatives. I know. 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A lot the nicoderm cq patch with unique extended release Technology Helps prevent the urge to smoke all day. I want this time to be my last time. Thats why i choose nicoderm cq. Pelley this weeks Earnings Report from retailers confirm what empty Parking Spaces have been suggesting sales are in a slump. Kohls said profits dropped 87 last quarter. Macys says its firstquarter income was down 40 . Carter evans with more on this. Reporter this is whats left of the sears in san mateo, california, one of nearly 300 stores its Parent Company has closed over the last two years. Sears chairman says its a victim of disruptive changes from online competition, and its not the only one. Sports authority plans to close 140 stores this year. Macys will shutter 36 over the last year. Ira kalb is a marketing professor at the university of Southern California. He says many big box retailers no longer give shoppers a reason to leave their computers. Retailers have lost their added value. Reporter since more online sales means fewer purchases at local malls, many Retail Developers are trying to upgrade the more Luxurious Shopping Centers that can sell twice as much per square foot and offer much more than shopping. In order to compete with online convenience and the onestop shopping, you have to create a store experience. The ones that have are the ones that are doing well. Reporter like the grove in los angeles, which is experiencing doublingdigit growth. Its a Shopping Center that looks more like a village main street, complete with a glen space, restaurants and valet parking, because the goal is no longer just shopping. Were also in the entertainment business. Reporter marketing director judy johnson says shoppers spendce than other malls. Whether they shop with us isnt really relevant, because at some point everyone has shopping or dining needs, and they will come back because we have built a great relationship. Reporter when they finish tearing down this sears store in san mateo, they plan the replace with it a landscaped plaza and luxury bowling alley. Now, some retail analysts say all these store closings were seeing are a good thing and may be long overdue because, scott, many retailers simply have too many brick and mortar locations, and they need to lean down to compete for those online shoppers. Pelley sign of the times. Carter evans, thanks very much. Why did an athlete give back a medal . Thats ahead. Reduce my risk of progression. And everywhere i look. Im reminded to stick to my plan. Including Preservision Areds 2. My doctor said Preservision Areds 2 has the exact nutrient formula that the National Eye Institute recommends of moderate to advanced amd. After 15 years of clinical studies. Preservision areds 2. Because my eyes are everything. Im terhe is. At golf. People say im getting better. No ones ever said that. But id like to keep being terrible at golf for as long as i can. Hes just happier when hes playing. But hes terrible. For the strength and energy to keep doing what you love, try new ensure enlive. Only patented ensure enlive has hmb, plus 20 grams of protein to help rebuild muscle. And its clinically proven formula helps you stay you. Oh. Nice shot. New ensure enlive. Always be you. I thought my bladder leakage meant my social life was over. Wearing depend underwear and im meeting people. Unlike the bargain brand, new depend fitflex underwear is now more flexible to move with you. Reconnect with the life youve been missing. Get a free sample at depend. Com. Pelley Southern California is being invaded. Red tuna crabs are washing ashore on imperial beach. Scientists are blaming warmer ocean water, which is drawing crabs north from mexico. F year when they covered beaches in a red carpet. Were just getting word that the navy has relieved the commander of the ten u. S. Sailors who were detained by iran back in january. Superiors have lost confidence in commander eric rashs ability to command. The sailors went off course in the persian gulf and entered iranian waters. The iranians held them for 16 hours and forced them to apologize. The Invictus Games for Wounded Warriors wrap up tonight in orlando. There was a remarkable moment yesterday when u. S. Army sergeant elizabeth marks returned her swimming medal to prince harry. She was asking him to give it to a british hospital that saved her life when she got ill during the first Invictus Games two years ago. Marks suffered serious wounds to her hips while serving in iraq. Can computer geeks hack it in the military . Thats next. Unless you have allergies. Flonase is the first and only nasal spray approved to relieve both itchy, watery