This is on our need to know file. This essentially paranoid government driven behavior is always rationalized in some way but serves only to slow everything down. In the meantime all those secrets are available for full application in the Dark budgets.
Worse it chokes open research allowing a rapid advance in knowledge. Those outside often wonder just how much is already understood, particularly in physics although there i do not think that is is possible to close out true knowledge.
We are all fed up with it and we need a global treaty to address thus nonsense..
6 Government Secrets That Go Far Beyond Edward Snowden’s Surveillance Leaks