@Nate YPX Grey as far as secrets i can just imagen its just for control and some people may fear disclosed beings. governments can be messed with by citizens and there was a radio show called war of the worlds where people freaked out thinking it was real. these may not be the exact case in modern north america. Then ontop of that im sure they wont tell people if they are tracking bloodlines because secrecy can be a weapon in expiriments and projects. maybe telling the public of a weapons testing site is a decent idea so they can stay off the property. However they will most likely not tell people if they are going to test on civilians or a populated area. Im sure weapons used on civilians wont look good. Most people just wonder but this is just written reasoning. i dont think i should cover unusual beings ( simply  compaired to the general public friends)  with this statement other then the classic life from another world.