Tornadoes catch Dallas area by surprise, halt air traffic

Cities across North Texas are dealing with widespread storm damage that tossed around tractor-trailers, tore the roof off a school, grounded planes and left the City of Arlington under a state of disaster declaration followingApr. 3, 2012 - Helicopter footage captured storms and the damage caused as several tornadoes moved through Dallas, Tex., on Tuesday afternoon. (Editor's note: This footage contains no audio) (/The Associated Press) Correction: Clarification: SuperFanThe agency counted

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