In this Backstory piece, Larry Potash provides a short history of the M.I.A./P.O.W. movement through the viewpoint of a select few families who lost loved ones in Vietnam and WWII, and their struggle to find answers. Also, how Bears QB Jim McMahon gave a boost to the movement during Super Bowl XX. Backstory airs Saturday nights at 6pm on WGN-TV. Check out the Backstory podcast at WGNtv.com/Backstory via Stitcher, iTunes, Google Play, or wherever you get your podcast

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