LIZ CHENEY – John Dickerson talks with former Congresswoman Liz Cheney about her new book, Oath and Honor: A Memoir and a Warning, her life in politics and what she sees ahead for the country.SUNDAY PROFILE – TARAJI P. HENSON – Tracy Smith sits down with actor Taraji P. Henson to discuss her new film "The Color Purple" and more.GEDDY LEE – Jim Axelrod catches up with Geddy Lee, the lead singer of the legendary rock band Rush, who has a new memoir out and is looking back on his more than five decades in music.LOSING THE STIGMA – Susan Spencer looks at the high number of suicides in the country and reports on how stopping the shame surrounding mental health might be a way to prevent those deaths.LEGENDS – Seth Doane visits the set of "Archie" to talk with the cast of the new series launching on the streaming service BritBox that looks at the life of actor Cary Grant, whose birthname was Archibald Leach.OFF THE BEATEN TRACK – Conor Knighton takes a ride on the Alaska Railroad, which has been around for 100 years.