There is a lot of symbolism in movies. There are a few anti-elitist/anti-establishment speakers and researchers who say that movies are double edged, they serve to numb the public via TBTB, and they serve to get the truth out- via those who know it and see that the suppression is wrong.
In the video, it said that earlier scripts of Back to the Future had some different symbolic connections. However, we did not see this in the movie. It is no secret that there is a division of the government that oversees the movie industry. They have the ultimate say in green lighting a movie and they will say, 'take this out, take that out, can't have this in there, can't do that'... So the reason for this, as we are told, national security. Oh, of course! Duh....hmmm.
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