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"We came through the airport and it was like tumbleweed," McIntosh says.

Rust depicts the manhunt for grandfather and grandson amidst a backdrop of snow-capped mountains and tumbleweed dirt towns.

On the ground, amid the sagebrush and tumbleweeds, are a few old barracks, a weathered wooden fence strung with barbed wire and a wind-battered guard tower.

She waves her hand, and Cocoa rolls away like a tumbleweed.

A lone tumbleweed blows through piles of coal at the Rosebud Mine outside Colstrip, a few miles from the power plant.