If an advanced non human civilization or group exists, then this NHI may have been the cause of the secret government program remaining hidden. The NHI may have threatened or controlled the secret group. (hivelink)
If an advanced NHI coexists in our solar system, then a secret group in the US gov hiding ufo tech has a million ways to explain their hiding the tech all this time. The NHI is more powerful than them.
(hivelink)no youtube