What was the impact of President John F. Kennedy’s assassination on ordinary Americans? We’ll talk to PBS News Hour commentator and noted historian Ellen Fitzpatrick, who combed through condolence letters to Jacqueline Kennedy. Her book “Letters to Jackie: Condolences from a Grieving Nation” is the culmination of that research. Could Texas’ next big music festival be in Denton? In the Art&Seek segment, we’ll talk to Chris Flemmons, organizer of Nx35 music “conferette” and a musician himself, talks about the festival’s second year, and what the future might hold.