In 1976, Cox's uncle, the late artist David Ireland, mentioned a job was available helping Christo install the 24-mile-long Running Fence across the hills of Sonoma and Marin Counties.

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"I think the main thing is to keep the fence running, because he's not going anywhere, " he says.

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Reaching a slipway guarded on their approach by a fence running down into the water, some of the men plunged into the river and began swimming upstream.

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