By Victor Knowles   Hazel Miner, 15, was an 8th-grade student in a one-room school at Center, North Dakota. On March 15, 1920, the teacher dismissed school early because of a sudden spring blizzard. Hazel, her 10-year-old brother Emmet, and her 8-year-old sister Myrdith headed for home in a buggy. But the buggy overturned and […]