Distributia
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Kavan SmithNarrator (voice)
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Roger BilhamHimself - University of Colorado
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Thom KikotNarrator
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Bart NeyHimself - Bay Bridge
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Phil StevensHimself - San Francisco Fire Department
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Kenneth JohnsonHimself - Geological Engineer
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George HilleyHimself - Geologist, Stanford University
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Andy SnyderHimself - US Geological Survey