This Tuesday, Jan. 8, 2013 photo shows Sparboe Farms in Litchfield, Minn. Dozens of federal homeland security agents descended on the farm on Tuesday as part of what authorities called

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This Tuesday, Jan. 8, 2013 photo shows Sparboe Farms in Litchfield, Minn. Dozens of federal homeland security agents descended on the farm on Tuesday as part of what authorities called a "larger criminal investigation," but details about the nature of the operation were not disclosed. (AP Photo/Independent Review) less 

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Associated Press
Wed, Jan 9, 2013 1:01 AM EST