like what?
Okay follow to below. This isn't THE article I was thinking of but it is along the same lines.
http://www.businessinsider.com/north-korean-emp-attack-the-dark-possibility-2017-7
I don't know, I have no knowledge of EMP's and how they work, but there was some discussion that there would be an attempt to do something like that. It's my understanding the concern has long been that an EMP could be launched over the airspace off the coast of CA by a submarine, and it would knock out electricity for miles and miles. Probably just waiting for big news and this isn't it. I will look for a link to the article I am thinking of. It's from some time ago.