KNIERIM – When Peggy Chalstrom goes to work, there’s more hanging over her head than a ceiling. She’s postmaster at the Knierim Post Office, one of the smallest of the small, with 34 boxes and no rural routes. As with small post offices across the country, she’s just waiting for the second shoe to fall. For the office to close. “We’re not going to stop the train,” Chalstrom said. “We really …
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