The laundry room of Tamara Huffman's split-level here in the Shenandoah Valley is filling up with cheese powder and freeze-dried ham, at the ready should her husband, Brian, lose his job anytime in the next 25 years. She carves a little bit out of their already tight budget every month to buy some more.

This sort of stockpiling was once the purview of survivalists preparing for Armageddon. But Huffman's fear isn't the end of the world so much as the $5 basket of grape tomatoes she bypassed the other day at her local supermarket.

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