Deep freeze envelops Midwest, even stops the mail
By BLAKE NICHOLSON BISMARCK, N.D. — A deadly arctic deep freeze enveloped the Midwest with record-breaking temperatures Wednesday, triggering widespread closures of schools and businesses, and prompting the U.S. Postal Service to take the rare step of suspending mail delivery to a wide swath of the region. Many normal activities shut down and residents huddled…