On this week's "CBS Sunday Morning," Ted Koppel sits down with community leaders and healthcare workers to explore the roots of COVID-19 vaccine skepticism. Seth Doane speaks to Paolo Fazioli. Chip Reid reports on the Columbian Harmony Cemetery in Washington, D.C. Nancy Giles interviews Academy Award-winning actress Ellen Burstyn. Nicholas Thompson of The Atlantic Magazine tells the tale of the man who went by the name "Mostly Harmless;" Lee Cowan sits down with Cindy McCain. And Steve Hartman tells the story of a Pizza Hut deliveryman who got a big tip.