Glasnost.

Actually, your account is a bit hard to follow. Perhaps a few links to primary sources, and less use of bold text and ALL CAPS in favor of clearer language?

In re your last paragraph, do you mean to say that because observers described the object as having "crash-landed," it must have been under control during the terminal phase? This does not seem obligatory to me. Furthermore, parts of spacecraft do survive re-entry -- cf. Skylab. And to go forward, in the 60's there were only two space-faring nations. Since the Air Force investigators knew it wasn't one of ours, it would be elimination be Russian.

And re evidence being lost...perhaps you've heard of some missing tapes concerning Apollo 11? It does happen. People aren't perfect.

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"You keep using that word. I do not think it means what you think it means."