I agree. It may have been top secret that we knew that Anthony Fokker had developed a way to fire a machine gun through the propeller blades of WWI era biplanes, which was a big deal, but...it is laughable to think our knowledge of when and how we knew, and what we planned to do about it would have any bearing on anything today.
So, that is one extreme.
On the other hand, what if we had intelligence in OIF that told us where to find Saddam and his associates that had been delivered by an asset who might still be alive and working today? Obviously, giving that up could be problematic today.
So that is the other extreme.
Where do we stick that pin along the continuum where one side is okay and the other side isn’t?
From EO 13526
Sec. 1.4. Classification Categories. Information shall not be considered for classification unless its unauthorized disclosure could reasonably be expected to cause identifiable or describable damage to the national security in accordance with section 1.2 of this order, and it pertains to one or more of the following:
(a) military plans, weapons systems, or operations;
(b) foreign government information;
(c) intelligence activities (including covert action), intelligence sources or methods, or cryptology;
(d) foreign relations or foreign activities of the United States, including confidential sources;
(e) scientific, technological, or economic matters relating to the national security;
(f) United States Government programs for safeguarding nuclear materials or facilities;
(g) vulnerabilities or capabilities of systems, installations, infrastructures, projects, plans, or protection services relating to the national security; or
(h) the development, production, or use of weapons of mass destruction.