I lurk a great deal and don't often post, but in this case it seems that there has been a serious failure by the intelligence agencies. It seems there has been evidence on social media for several days that the separatists had got hold of BUK missile units. Yes, social media has failings (though it is regarded as important enough to slurp by alphabet agencies), but this needed investigating and the information passing to relevant bodies, such as decision-makers in civilian air transport agencies.
This could have been avoided, but, hey, the real risk is uncharged mobile phones ...