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Published daily in Bend, Oregon, by Western Communications, Inc. Copyright 2007.
By Brian Vastag and Ed O__utf2019__Keefe / The Bulletin
May 25, 2011
The extraordinary Joplin twister — the single deadliest tornado since officials began keeping records in 1950 — was a rare destructive phenomenon known as a “multi-vortex,” hiding two or more cyclones within the wider wind funnel.
Sunday’s storm....
