Nathaniel Kahn's My Architect and Earth Architecture in Bam

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Today's guests:
Nathaniel Kahn is the director of My Architect, about a son's quest to understand his late father, the influential architect Louis Kahn.

Architect Nader Khalili is the founder of the California Institute of Earth Art and Architecture in Hesperia, San Bernardino County. She is also the author of Racing Alone, about his journey around Iran, discovering earth architecture.