First of all, it is sad to hear about the loss of lives.
Second, the passport issue combined with NO communication from the pilots does raise a big honking red flag.
Third, if it is terrorism, the govt may want to bury it so as to avoid a panic in the public which would result in economic problems. Yeah, I know, it does have a shade of foil hat conspiracy theories but you can't possibly believe that we haven't buried fact before (army testing drugs and diseases on humans...).
Capt Obvious says if it walks like a duck...
Finally, anyone else seeing this as a plot out of The Blacklist?