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... of the most startling discoveries in the history of medicine might never have beep made if a tornado hadn't... wrecked a town in Minnesota a little over a half century ago. The town the tornado struck was Rochester..., to repeat—if a tornado had H't twisted and roared through the r- i Idle west fifty-two years ago the v.rld... destined to affect the history of medicine. The tragedy was this: a cyclone, a tornado, swept over