Walk up a steep road through a scorched landscape with reporter Matthias Gafni in St. Helena. Gafni narrates his walk up North Fork Crystal Springs Road, near the Dancing Bear Ranch Vineyard, part of Cakebread Cellars, where Cal Fire has been focusing its investigative teams on finding what might have started the Glass Fire. | Full wildfires coverage: sfchronicle.com/wildfires | Unlimited Chronicle access: sfchronicle.com/pod

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