I'm no structural engineer (mechanical), but it surprises me that given how much structure was completed already, that the 60mph or so winds caused failure the way it did in three different points. The track will stiffen the structure a bit, but unless they still have more lateral bracing to install to an already fairly robust looking structure, I am wondering if there was some type of building/design error on the structure (perhaps the type or quantities of fasteners utilized) and the method the structure is secured to itself.
60mph winds (or more) will happen again. Hopefully the completed structure was designed properly (likely) and build properly (questionable, perhaps?) to account for such things. I'd assume so, but again, just seeing how much structure was complete already and that type of multiple-point failure is a bit hard to believe... Even for 60mph or more.
As mentioned above, if SOB had similar collapse during construction, that isn't a good sign
As we all know there was flaw in both materials and design/construction, if I recall.