Grandpa, look at the map: http://www.anti-nato.com/#map You say that some countries voluntarily joined to NATO, o.k. may be, but you see, there are NATO bases in Serbia, Iraq, Afghanistan, etc. (they ain't members of Allianse). Don't you see, that's NATO's relentlessly moving into the East? Оne way or another, by joining or conquering countries, NATO set up their bases in the East. Now the question is will be or not NATO bases in Ukraine and Georgia. If Putin would just sit with crossed arms, then NATO would be in Crimea already now. So, yes, the annexation of Crimea is the mesure of self-defense for Russia. Crimea is the key to Russian defense. Russia coludn't let lose it.And yes, formally Crimea, was the part of another country, but in fact it was always stayed a russian territory. The majore part of population are russians, the main language is Russian, etc. So it's not exactly annexation.