What do the spies know?

Some interesting speculation on the Malaysia Air disappearance - does our spy agency know what happened?
Or does China's spy agency know?
You don't usually track all planes, or know which ones are doing something out of the ordinary.
But maybe the spy agencies do.
And don't want anybody to know they have the capability to find where this plane went.
As the days pass in this mystery, you look at the technology - what's possible to find this plane?
Probably more than we know now.