Yes, you can, but that doesn't mean there isn't a real need in some, if not many, cases. The big questions are how do we balance the real need to protect nation

Yes, you can, but that doesn't mean there isn't a real need in some, if not many, cases. The big questions are how do we balance the real need to protect national security with the actual harm to public interest and how do we eventually address the actual harm to public interest that occurred when something was classified.