POV

If a Tree Falls: Q&A at Sundance

Filmmakers Marshall Curry ("Street Fight," POV 2005) and Sam Cullman discuss the making of "If A Tree Falls: A Story of the Earth Liberation Front" after the world premiere of their documentary at the Sundance Film Festival. They explain how they found their subjects and gained the trust of their characters. The film is slated to air on POV in September.

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