Huh, will be interested to hear new information as/if it comes out. I just want to know to what extreme the bridge was pushed to cause the failure, or which extremes I guess. Rarely is it usually one singular issue but a series of failures on stuff. Overloading a bridge with people (can you do that? Vehicles are heavy, but are people more dense when shoved together?) then having them undulate the bridge would cause some serious stresses I'd imagine. Pair that with quick/shoddy construction, I could easily see that happening.