ya'll are overcomplicating it. this is the way the government works. need to know. that's it. if they don't think you need to know, then you don't. so, on the subject of ufo's and aliens any knowledge the upper groups in the government have, the lower levels don't need to know to accomplish there mission, so they are as clueless as the rest of us. i'm sure there are task forces and sections of the military, CIA, ect that are assigned to investigate these occurances and they have knowledge as to where they come from and what they are doing here. but the people above them have decided that the rest of us don't have a need to know, and would prefer if we didn't know. because it makes it harder for them to do whatever it is they are doing with this knowledge.
Great spirits have always encountered violent opposition from mediocre minds!