>> reporter: for a few hours today, this funeral brought together want right and the left, something powell himself tried to do so often in public life. colin powell was 84 years old. norah. >> o'donnell: yeah, i think about his legacy there now, over 40 schools in the united states named after colin powell. nancy cordes, thank you. and colin powell died of complications from covid. he had been fighting a rare blood cancer and parkinson's disease. so now, cbs' jonathan vigliotti has the story of a man who knows all about the struggles of trying to survive the pandemic when you have a waninged immunity. >> reporter: for mark harrison, an i.c.u. pediatrician, the utah mountains are his safe space. he spent 12 hours a week training near his slux home for triath lons. it's one of the rare times he can go without a math. >> i had a bone marrow transplant. i got lethal dose of chemotherapy to wipe out my own