re: What should US do if Russia crashes US computer network?

Thanks for the responses, folks.

It's an interesting topic.

We'll have to rely on our computer network experts to make sure that our system is incapable of anything but a minor disruption from cyberattack.

If we can make sure of this, then we don't have to worry about cyberattack causing the kind of economic loss that, say, an EMP bomb would wreak.

If we can ensure our system from cyberattack, then we can take each minor hacking/cyberattack incident at it comes, and possibly respond in kind.

Let's be nice to our computer network expert folks so that this doesn't become an issue.

I agree that if some kind of massive cyberattack were to collapse a country's economy, that would be an act of war against that country. I don't think that International Law has completely resolved the issue in a coherent manner yet, however, but, in a common sense way, most people would consider it to be an act of war.

Here's to the computer geeks ! . . . I mean, here's to our esteemed computer network experts !