As to the previous discussion about the Concept of a no-fly zone. There's Three questions that need to be answered.
1) Could NATO enforce a no-fly zone over Ukraine? (probably yes)
2) is it SMART to enforce a no-fly zone over Ukraine from a MILITARY standpoint (Probably No - will escalate conflict and mean a proper hot-war with NATO countries becoming fully involved)
3) Who's the bad guy (Probably meaningless - but probably Russia)
People are focusing far too much on #1 and #3, when I think #2 is the most important. If I had a vote, I would vote against ANYTHING that could put Canada into a hot-war with Russia.