1. If the aircraft were to physically break apart shortly before impact, a puff of WHITE smoke would not indicate an explosion brought it down, ESPECIALLY considering the plane was already crashing and uncontrollable at this point.
2. There had to be, however, a prior cause for the crash. I am personally leaning towards an un-airworthy airframe, damaged by prior CAT, slammed by this WT event, that caused the aircraft to enter an attitude that ripped off the tail. Everything else happened from there.
3. Flame away oh conspiracy and government-is-lying buffs...
Personally, I'd vote for separate threads -- headed "for conspiracy buffs only" and "all others".