Where's the ABM System when you need it?

I caught this story on FoxNews this afternoon. Why is Putin building new nuclear weapons? I'm particularly troubled that he said:

"International terrorism is one of the major threats for Russia. We understand as soon as we ignore such components of our defense as a nuclear and missile shield, other threats may occur."

Who does he expect will attack him? Who does he think will drag the world into nuclear war in such a way that he needs new advanced technology to gain the advantage? The only countries that I think that qualify as serious nuclear threats right now to Russia are the Chinese and us.

We're certainly worried about the Chinese military buildup. And sometimes rightfully so, given their aggressive nature.

So are the Russians and the Chinese going to drag us into a new nuclear arms race? And what do we do if Putin decides that it's in his best military interests to start invading the breakaway republics and installing friendly leaders? Do we fight the Russians? Just ignore it? Stomp around the UN and whine with the rest of the world?

I wish I had the answers.