I took a drive today to visit Brian, Gail, Josh and their friend Edgar.
To get from the peninsula side of Puget Sound to the Seattle/Tacoma side you can take a ferry, or you have to drive around the south end of the Sound. The Tacoma Narrows bridge was built in 1940 to make that drive shorter.
This is a shot of the crossing today from the Gig Harbor side. The old bridge is on the left. On the right is a newer, twin span that was completed only several years ago. Now each bridge carries traffic in only one direction.
The original span was completed in July 0f 1940. It was the longest man-made suspension bridge in the US at the time, and the 3rd longest in the world. Only four months later it had collapsed. Let that be a harmonics lesson to all of us…
Here’s a youtube video with footage from November 7, 1940, the day the bridge collapsed in 40 mile an hour winds after pitching and swaying for over an hour.
Sheila365 
incredible video – YIKES!