Highest Classification for them is making us think we are alone in the universe.
If we knew otherwise we might start looking for them among us.
They walk among us Invisible.
We are told we are alone for a reason.
THEY DO NOT WANT YOU THINKING THERE IS A POSSIBILITY THAT THOSE THAT WALK AMONG YOU ARE NOT HUMAN.
This is why there in NO DISCLOSURE.
They want you to believe you are alone so you never even think to look closer.