Regarding NASA and research suppression, I have an extremely difficult time understanding what could draw you to that conclusion.

Don't misrepresent what I said. I did not state I had made a "conclusion." My reason for wondering about it is that NASA has devoted surprisingly few resources to advanced propulsion research. Something people have been complaining about for years. I think bureaucratic inertia and congressional meddling are more likely explanations, but there is no reason it has to be an either/or.