I suppose I can only throw out the suggestion of disgruntled employee sabotage or opposition sabotage. Definitely not what I'd expect from this crew. Have met both members of the flight deck of this crash a few months back, both solid pilots, I wouldn't jump to questioning their ability. Have been on a Sukhoi SJET test flight - a sturdy craft indeed. I think we need to shy away from the usual 'Russian plane - it was bound to crash' and blaming ATC. I suggest some interesting things will come out of the investigation to follow.