Les Blank is one of the filmmakers who directed the documentary "Burden of Dreams," which will be playing at the International House in Philadelphia. The documentary is about the making of Werner Herzog's fictional film "Fitzcarraldo," which chronicles an Irishman trying to build an opera house in the Amazonian jungle. This interview originally aired on Michael Goodwin's radio program about film on Pacifica Radio Station KPFA in Berkeley. (INTERVIEW BY MICHAEL GOODWIN)