slawson did almost all the work, slawson was very intrigued by what happened in mexico city and wanted desperately to try to get to the bottom of what happened down there. unfortunately, what we now know is that a tremendous amount of information about what went on in mexico city was never shared with slawson, was never shared with the commission and i think it's fair to say the commission never got to the bottom of what actually happened in mexico. >> this is an artifact that the national archives allowed us to videotape. it's oswald's address book. that's the cover of it. and then inside is this page. consulate of cuba, and then name, sylvia duran. >> sylvia duran turns out to be arn important figure in all this. the warren commission staff saw her as an important figure in all this. she's a young mexican woman, a committed socialist, who is employed by the cuban consulate in mexico city. and she is the person who dealt face-to-face with oswald while he's trying to get the visa and other paperwork from the cuban government that will allow him to defect. there's reason to believe that