Mark Danner in conversation with Don DeLillo and Errol Morris at the 2013 Telluride Film Festival. DeLillo reads an excerpt from his novel, Underworld, and screens the iconic 26-second Zapruder film. Danner, DeLillo, and Morris discuss the film as well as Errol Morris’ The Umbrella Man, a short video that explores the story behind the man standing under an open umbrella at the scene of the assassination