Before it came for him, Dan Robinson watched the thing grow. It began as a bolus that descended out of the storm, projecting needle-like vortices that lanced the wheat fields near a lone pump jack. Columnar towers a hundred yards wide gathered and darkened against the pale light to the south, unspooling into wispy coronas that moved across the prairie beneath the rotating, two-and-a-half-mile-wide... More >>>