How is it possible that the contents of those tapes are known . Can one be 100% sure there was not any sensitive material on there. Obviously since those tapes could not be read by anyone (including NASA I assume) other than JBI the contents would not have been revealed until they were processed in the lab. I am sure there are those entities that would have wanted to get their hands on those tapes in the hopes of finding some useful information. I'm sure NASA did a background check of JB before just handing over all those tapes and he passed all the checks looks like.
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