World premiere of the trailer for ‘The Post’. Jason Segel discusses his new book, ‘Otherworld’. Jeff Fager & Lesley Stahl discuss ‘60 Minutes’'s 50th anniversary and the new book accompanying it, ‘Fifty Years of 60 Minutes’. Mavis Staples performs "Build a Bridge" from her album ‘If All I Was Was Black’, with Jeff Tweedy, Jon Batiste and Louis Cato providing musical accompaniment.