We had this a while ago and it was interesting so let's do it again. Let's have a thread dedicated to discussing engineering disasters and fuckups, notably historic ones that shaped the face of the engineering class itself.

>https://en.wikipedia.org/wiki/Hyatt_Regency_walkway_collapse

Link related. 2nd deadliest U.S structural collapse behind 9/11, all because of a last minute design revision that wasn't looked over properly. I'm not sure if that's blood visible on the floor.