Minnesotans are usually cold weather pros. But this week's polar vortex ushered in rare, double-digit subzero temperatures that have some doubting how best to weather the deep freeze. We asked Star Tribune readers to send us their most pressing questions:
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A man impersonating a police officer shot and killed Minnesota state legislator Melissa Hortman and her husband at their home in what Gov. Tim Walz called ''targeted political violence.''
