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Tracking down one of nature's deadliest storms
Packing winds sometimes in excess of 300 mph, tornadoes can ravage one part of town and totally skirt another. Meteorologists knew little about the storms decades ago, but new technology and climatic studies have given them fresh insights into when and where dangerous twisters form.
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ON THE SCENE » Tough forecasts
GALLERY » Fujita Scale
QUIZ » Tornado trivia
MAP » Tornado Alley
GALLERY » Twister facts and tips
GALLERY » Testing tornado myths
GALLERY » 10 deadliest U.S. tornadoes
GALLERY » 2003 twister damage
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