When I was reading the article yesterday I wondered why are they telling us that the grid has been hacked. I thought this is not news at all, I mean what can we

When I was reading the article yesterday I wondered why are they telling us that the grid has been hacked. I thought this is not news at all, I mean what can we do about it. And how do they know that it was Chinese and Russians? I am sure any nation would like to know how the advanced grid works.