Mothmen.
My family used to drive across the Silver Bridge all the time when we went on vacation to W. Va back in the 60’s. My sister gets freaked out about driving across bridges to this day.
Bridges on public roads now have to be inspected every 24 months nowadays. An awful lot of places (cities, counties, and states) did NO inspections before they were required. It was because of this bridge that the inspection routine was started.
Unfortunately, the overall condition of the average bridge has not increased very much since then. Do a search for your state on what percentage of the bridges have a sufficiency rating of less than 50%. A few new ones get built each year, but ALL the other ones continue to deteriorate. Fortunately, most of the fracture critical bridges (like this one and the Minneapolis bridge) have been replaced. Not all, but most.
Moth man is a bunch of nonsense, but John Keel’s book is what made most people hear about this disaster.