"National Security" is not itself a grounds for secrecy

I think that's the take home point from the discussion on this post. Obviously, national-security related information in the government's hands should sometimes be non-disclosable: identification of agents and sources, commitments to foreign governments, preserving the fairness of future prosecutions would all be good reasons. But the mere fact that it relates to national security isn't a good reason to keep the information from the public: after all, it's our security that's at issue.