[benVFR]

Resonance and harmonic frequencies are definitely real bridge concerns.

Google the Tacoma narrows bridge.. a famous collapse due to lift from wind + harmonic frequencies.

The Tacoma bridge seems to be burned into the eyes of many engineering students their first semester... heck I think they showed it to us at student orientation.

ISTR when I visited the Air Force Academy when looking at schools they also had a really cool demo they showed us where they destroyed model airplanes in a wind tunnel with the effects.

Why has no one blamed Evolution? Last Sunday the preachers on TV were saying Nazism and Communism were caused by the theory of Evolution, surely bridge collapses are too. Stem cells or abortion might be good things to blame for this too.