> I think there is a chance Europe will offer air support in Ukraine

I was thinking about that. They are now going to deliver some Migs to the Ukrainian army, because their pilots can already operate those. But let's say they don't have enough pilots for that, who is to say who's operating those Migs? Some Polish volunteers that joined the foreign army recently?

Russia also pulled that stunt in the east where Russian "volunteers" are fighting alongside the separatists.