During the early days of the cover-up over the alien presence, when those in charge of the cover-up presumed a naive and gullible public, project Blue Book was initiated. Since UFO sightings were in the air, the Air Force was the presumed arm of the military that would be in the know. Assigning the Naval intelligence as the primary arm of MJ12 was supposed to be a slight of hand that no one would suspect. Thus the Air Force officers assigned bustled about and issued reams of paper, all looking very official. They were given a list of probable explanations for strange lights in the sky, and dutifully ascribed something on the list to any sighting reported. When on occasion an officer working for project Blue Book got too curious, he was reassigned. Those who prated the party line and didnt attempt any independent thought remained. Thus, as would be expected, the final report fell neatly into line with the original intent - UFOs were all swamp gas or meteors, or the figment of the public's active imagination.