Pretty sure if "aliens" exist, greys, reptilians, slenderman look-alikes, etc. , that it would be the most impossible thing to be kept secret. it would have leaked long ago.

When Q answered "No" when asked if we are alone, people automatically jump to aliens.

Also, I've yet to see any evidence that the Pentagon was hit by a plane (with wings). I still don't believe it, unless Q wants to drop real info on it for proof.