This week, Clay's conversation with Enlightenment correspondent David Nicandri about four subjects: Ken Burns' documentary on the buffalo; the solar eclipse of Saturday, October 15; a new book by former Secret Service Agent Paul Landis about the Kennedy assassination — Landis actually tampered with the evidence in the presidential limo, and now, at 88, he wants to tell the people of America his story; and a preliminary conversation about the structure of road adventures, beginning with the Lewis and Clark Expedition and ending with Nicandri's recent trip to the Arctic Circle.