Old news, but what about the years from 1947 to 1954, beginning with Roswell?
This certainly does not explain the UFO seen hovering in the air by my parents and numerous people on the block in Sacramento where I grew up a month before my older sister was born in 1947. My parent and neighbors talked about it hovering for a good twenty minutes, humming, and then, with an increase in the humming sound, going straight up and the sound and it went out of sight!
Nor does this explain the slightly glowing, disk shaped UFO, about twice the size of a full moon, which I saw along with an entire Up With People cast performing a show in Hughes Stadium on the evening of October 8, 1967, come drifting slowly from the North toward the South, then come to a stop and hover above and behind the crowd of over 8,000 watching the show. It stayed there for about two minutes, not moving, and the shot straight up, dwindling out of sight in abou fifteen seconds. The stupid thing was I was standing there with a CAMERA in my hand and just stared, never thinking to use the camera! I had been taking photos for publicity purposes. . . but I never took a shot of the UFO. The one I saw did not have the domed top. It looked like two symmetrically and gently curved plates put face to face.