If the government wants to get out of something, they need only utter “national security” and all concerns are nullified.
This excuse is abhorrent and has no place in a democracy.
Authorities should be demanding better explanations. If a source is at risk of exposure, fine, say that. If it’s another case, say that.
If you can’t come up with anything more palatable than “national security” then it’s a clear sign you have no ground to stand on.
Shame on you people who use the excuse of “national security”. You are not worthy of the democracy you enjoy.