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Weather Fact for Today
On November 7, 1940...
The infamous Tacoma Narrows Bridge in Tacoma, Washington collapsed in strong winds, just four months after it opened. The winds caused the evenly-sized spans of the bridge to vibrate violently. Twisting motion caused the roadbed to tilt 45 degrees from horizontal one way and then 45 degrees from horizontal the other way until the central one finally collapsed. The disaster prompted many changes in the way bridges are designed.
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