I think the term "nuts and bolts" is misleading. I don't think we can say what type of technology is being employed to manifest the phenomena. The technology may and seemingly does, employ principles and materials that we totally unfamiliar with.
I think there are three things at play. The first being the misidentified or unrecognized natural phenomena. The second being misidentified or unrecognized human technology, which would include hoaxes. The third being the UFO phenomena proper such as described in the
Rendlesham forest incident, by Gorden Cooper, JAL Flight 1628, the 1976 Iran incident, and the Hessdalen Phenomena, among others.
I think there is sufficient evidence for a reasonable person to say that there are, as yet, unidentifiable objects operating under intelligent control in our atmosphere. Intelligent control, implies the use of technology unless one assumes that the UFO phenomena is a natural manifestation of a living being of some sort. I think the evidence suggests that the phenomena are not "rods", "light beings/orbs" or "sky fish" (all of which I think can be proven to be camera artifacts) but rather "machines" of unknown origin and purpose.
Whether the origin of the phenomena is earthly, extra-terrestrial, or inter-dimensional (which by definition is extra-terrestrial as well) it seems that unless one wishes to entertain the notion of super-powered supernatural beings masquerading as products of technology, that "nuts and bolts" (that is to say technology of some kind) must play a part.
We must first, as a society, admit that there really is something to the phenomenon. Then we can move into the dispassionate study of it. Only then can we start to get a clearer picture of its origin.
Nicely put Ron. I think the NSA document "UFO Hypothesis and Survival Questions" elaborates on this point well.
"Up until this time, the leisurely scientific approach has too often taken precedence in dealing with UFO questions. If you are walking along a forest path and someone yells 'rattler' your reaction would be immediate and defensive. You would not take time to speculate before you act. You would have to treat the alarm as if it were a real and immediate threat to your survival. Investigation would become an intensive emergency action to isolate the threat and to determine its precise nature. It would be geared to developing adequate defensive measures in a minimum amount of time. It would seem a little more of this survival attitude is called for in dealing with the UFO problem."