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Gallopin’ Gertie

The U.S. Open kicks off tomorrow at Chambers Bay. Let's hope the contestants have a better ride than the one across this bridge:

I remember being shown that video in school. I think we were learning about resonance, and the winds just happened to produce a frequency that matched that of concrete (or something like that, and I'm too lazy to look it up, or not: ((That's often the stated reason, but the real reason was "aeroelastic flutter."))). Any way, a pretty crazy thing.