Well, if you think one country has the "right" to invade/control another country you're right that Putin is more than a little justified in the course he's chosen. I do not agree - in the early '90s Ukraine gave up it's nuclear weapons and in turn was guaranteed to be treated like an independent nation. The question now is what, if anything, can be done about Putin moving into Crimea? Sanctions against Russia seem to be the only weapon NATO has but they have to be leveled quickly and firmly.