the Challenger explosion?...
Hyatt Regency?....
Challenger - the white male engineers warned them not to launch. It was the hacks at NASA that caused that one. (Or, if you want to trace it back, it was the persecution of the Nazis that built NASA that ultimately led to the disaster.)
The Minnesota bridge wasn’t an engineering failure, it was a combination of anti- icing solution over a period of time, poor maintenance, and parking over a half million tons of equipment on the bridge in addition to the normal traffic weight.
You’ll need to identify which Washington bridge collapse you are discussing (Tacoma Narrows, or Lake Washington, or something else), and identify the engineers on the Hyatt collapse by name so they can be researched.