Peter White Television EditorIn times of national crisis, many Americans turn to late-night television to help understand and process what’s going on.Late-night has a history of summing up the mood of the nation, from Harry Belafonte interviewing Martin Luther King during the riots of 1968 when he guest-hosted The Tonight Show, through to Arsenio Hall’s interview with LA Mayor Tom Bradley after the LA Riots in 1992 and David Letterman’s emotional monologue after 9/11.That has never been clearer