stone movie "jfk" had come out. posited a story it wasn't oswald acting alone but broader conspiracy. had always been that around the assassination but movie drove interest into overdrive. in 1992 congress passed a law, jfk records act, idea to tamp down the assassination conspiracy theories. first batch of documents released following year in 1993 and nbc sent tom pettit to the national archives to report on the new details sure to turn up in those records. there was a lot of interest. turned out to be kind of a bust. >> thousands of documents do show that cia was deeply involved in the assassination investigation, nothing of any other cia involvement so far. one file from 1963, kgb defector