1940 - The Galloping Gertie bridge at Tacoma, WA, collapsed in strong winds resulting in a six million dollar loss, just four months after the grand opening of the new bridge. The winds caused the evenly sized spans of the bridge to begin to vibrate until the central one finally collapsed. From that point on bridges were constructed with spans of varying size.
1951 - At 7 AM a blinding flash, a huge ball of fire, and a terrific roar occurred over parts of Texas, Oklahoma and Kansas, caused by a disintegrating meteor. Windows were broken in and near Hinton OK by the concussion.
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