This week, our Mainstreet reporting team looks at Minnesota's 'hidden' population -- rural minorities. In some Minnesota counties, all the residents are white. In some cities and towns, the minority population has just begun to grow. It's a change that enriches life for some, and threatens others. The recent Supreme Court treaty affirmation capped a decade of friction between American Indians and their non-Indian neighbors. We're now left to digest not only the impact of the decision, but also the shouting, defensiveness and political manuevering it followed.