1.4 million to be precise.
That's just folks with the "top secret" security clearance.
For a regular run-of-the-mill secret clearance, there are over five million people.
The think tank here at Falling Downs has it as a matter of policy/mission statement that there is never any reason why a democratic state needs to keep secrets from its citizens.
Manning and Snowden and so many others who have not made the evening news are heroes, because they have called the elite on their anti-democratic mission of valorizing state secrets.
A true democracy never needs to keep secrets from its citizens.