Separating wheat from chaff at the Rollag threshing festival

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Volunteers use pitchforks to load shocks of dried wheat stalks into a threshing machine.
MPR Photo/Nathaniel Minor

Every Labor Day weekend, thousands of people come to the Western Minnesota Steam Threshers Reunion in the tiny northwestern Minnesota town of Rollag. Dozens of sometimes-antique steam engines are shown that were once used to thresh -- to separate grain from the stalk.