It's a funny thing.
We can blame China for stealing secrets all day long, but the thing is that they don't yet have any technology (that your everyday citizen) knows about.
But you can bet that the US has attacked Chinese servers and stolen many secrets, and they're probably just checking on what they know about our technologies still in development, and borrowing any good ideas they might have.
You just don't hear about it because that kind of thing isn't reported on in China due to its government and the US sure doesn't broadcast it to the world.
But to think that the US doesn't know how China built, say, its latest stealth fighter or any of its newer technology is quite naive.
The US has been capable of stealing secrets and keeping watch way before companies starting storing their secrets electronically. Before then, they'd just burglarize offices just like the Soviets used to do and what the Russians still do today.
Think about it. It's like the US coming out and announcing they're capable of flying out of the country and breaking into stuff without you knowing.
So good for them, but the "good guys" (i.e. the US) are just as bad as China and Russia are in that regard.
And yes, we do need a plan should foreign hackers take power grids and such offline (but since the North American grid is a 110-year-old kludge and nobody actually understands how it keeps working, that would be a task in itself...).
So they're now just confirming that destroying US government machines will get you "v&" anywhere in the world, rather than a definite maybe.