How did 'Back to the Future' get selected to the National Film Registry?

Our broadcast on PBS/Independent Lens was a 53-minute cut-down version from our original theatrical/DVD/Blu-ray 88-minute version. One of the segments that was not included in the PBS 53-minute version was about how Back to the Future came to be selected to the National Film Registry. Stephen Clark over at BTTF.com (BTTF = Back to the Future) posted that segment from our doc on his youtube channel. It is a great story of the insider (Liz Stanley) and a grass roots campaign organized by Stephen.

If you have been meaning to buy a Flux Capacitor - get it at bttf.com:
http://www.bttf.net/Back_to_the_Future_Part_II_Flux_Capacitor_p/21014.htm