Putin bragged about the nuclear heads and that's a big mistake.....as my father used to say ""Dog who barks doesn't bite"" if he wanted to use them he would have done so without bragging about it. What I can't figure out it's why Nato and/or US military doesn't go in, after all Ukraine asked for help not lie in Syria who didn't ask fro help but the US went in or Nato in Kosovo/Yougoslavia/Serbia also the UN not moving in to help secure human corridors, what's the purpose of the UN, useless and should be dismantled, one of it's security members with veto power invaded a neighboring country braking the UN charter and they let it slide