LES BLANK A National Treasure Les Blank died last Sunday at 77. Taylor Hackford called him a “national treasure.” “Although his films are not well known at the moment, they’ll take their place,” he told The New York Times. “Films are great when they live a long time, and I think Les’ will live.” Blank was quietly renowned for intimate documentaries exploring comparatively unknown music genres and regional cultures (Cajun/Zydeco titles...