Flights Canceled, Offices Close Amid Frigid Midwest Weather

By BLAKE NICHOLSON , Associated Press BISMARCK, N.D. (AP) — A deadly arctic deep freeze enveloped the Midwest with record-breaking temperatures on Wednesday, triggering widespread closures of schools and businesses, and the canceling of more than 1,500 flights from Chicago’s airports. The cold even prompted the U.S. Postal Service to suspend mail delivery to a…