That is using the polio virus to attack glioblastoma the deadliest brain cancer there is. This, to me, is the most promising therapy i have seen in my career, period. Pelley a turning point in cancer care . I hope so. I think it may well be. Pelley with that kind of promise, the scientists at duke are using the polio virus on other cancers in their labs. What have you been able to kill so far . So, we have done this for lung cancers, Breast Cancers colorectal cancers, prostate cancers, pancreatic cancers, liver cancers, renal cancers. Im steve kroft. Im lesley stahl. Im morley safer. Im bill whitaker. Im charlie rose. Im scott pelley. Those stories tonight on 60 minutes. My name is pam and this is my aha moment. My brother died from complications of obesity and diabetes. He had been overweight. It could have been prevented. And i felt that if i could change the lifestyle of one child it would make a difference. So i went in and converted a vacant classroom and turned it into a fitness