On this edition of "60 Minutes," Bill Whitaker investigates the life-saving drugs that are in short supply in hospitals across the U.S. Scott Pelley goes to a school in the southside of Chicago to see an act of kindness so profound it can change the lives of those students forever. And Norah O’Donnell has a front row seat to opera’s leading man.See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.