Viewers of Joshua Oppenheimer's jaw-dropping documentary "The Act of Killing," about the men who conducted Indonesia's genocidal anti-communist purges in 1965, might well have concluded that it was an impossible act to follow. Yet its sequel is, if anything, even more accomplished and affecting.Joshua and I talked about the making of the movie, its visual and sonic poetry, how violence distorts the psyche, the possibility of reconciliation, and the resolve that kept him working during years of difficult filmmaking. Josh is uncommonly thoughtful and eloquent on these questions, and this interview is well worth a listen whether you've seen his films or not.