Ok a few things, firstly, could you please elaborate on who exactly it was intent on reopening the 9-11 investigation?
Secondly, do you at all understand what icing conditions are in the aviation world and how quickly it can bring an otherwise perfectly operating aircraft with an excellent crew down?
Back in 2001, I lost 4 friends on board a Cessna Caravan, in otherwise clear weather. Ten people total died in the crash. I am going to assume you dont live in a cold area, but in cold areas, often times aircraft are sprayed with a de-icing solution to prevent these events on take off. This plane was in otherwise perfect condition with no other faults except having a thin layer of ice on the top of its wing.
Ice forming on wings, fuselage and on the various control surfaces, even in quite small amounts disrupts the air flow, over the wings especially. Which can cause a loss of lift, or control, and often both. Causing a crash.
The Dash-8 recently involved in the Buffalo crash was descending, down to a level that is quite dangerous for a number of reasons. 2,300ft altitude does not provide much time to recover from a stall, probably about 10 seconds, certainly less than 15. Also, most of the cases of icing happens at less than 5000 feet. This is where most of the humidity is in the air that leads to icing.
Ultimately, I could give a ton of evidence as to the probable reasons, that this aircraft went down. It is tragic, and hundreds of lives will be forever permanently altered as a result, but I dont think that matters much to you. Because despite presenting zero evidence of anything in regards to foul play, your mind is made up, and no amount of overwhelming evidence to the contrary will suffice. Let me go get the tin foil out now. 
