You're asking the wrong question here. The question should be, "Should America have to fight World War Three in Order to Defend Estonia?"
The bottom line here is that we should never be in that position. As long as we exhibit strength, Russia will not dare to attack Estonia. The fact that such a possibility now exists shows that we have already lost.
'Leading from Behind' is not leadership. It is surrender to the outcome of everyone elses' leadership.
Hoodat, I’ll sign on to that.