The medical clinic building is actually an Ironworkers union hall.
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In order to get the cows to react to a fictional "flying creature", there was a wrangler off screen making dog noises.
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The Copeland family motorhome is actually a pair of duplicate motorhomes. One was used primarily for interior shots, while the other was used mainly for exterior and traveling shots.
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The poisoned whisky that Josh tricks the looters into drinking is actually just water plus food coloring.
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Karen's necklace is inspired by the U.S. military's Air Assault badge. Though she is no longer in the military, the badge represents a significant time in her life and is something she keeps close to her heart.
