Dan Froomkin rightly chastises Judith Miller:
So what was Miller doing in jail? Was it all just a misunderstanding? The most charitable explanation for Miller is that she somehow concluded that Libby wanted her to keep quiet, even while he was publicly — and privately — saying otherwise. The least charitable explanation is that going to jail was Miller’s way of transforming herself from a journalistic outcast (based on her gullible pre-war reporting) into a much-celebrated hero of press freedom.
Note to reporters: There is nothing intrinsically noble about keeping your sources’ secrets. Your job, in fact, is to expose them. And if a very senior government official, after telling you something in confidence, then tells you that you don’t have to keep it secret anymore, the proper response is “Hooray, now I can tell the world” — not “Sorry, that’s not good enough for me, I need that in triplicate.” And if you’re going to go to jail invoking important, time-honored journalistic principles, make sure those principles really apply.