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 there was a relationship between oswald and duran that went on outside the walls of the cuban consulate and that they were seen around town together, including at a party, attended by cuban diplomats, some of whom had apparently spoken openly in the past about their hope that somebody would kill president kennedy. the warren commission staff, this young fellow, david slawson is desperate to talk to sylvia duran, to interview her, to find out what she might know. after much negotiation, it appears that sylvia duran will come to washington, she'll agree to be interviewed, but that idea is vetoed by chie

this is sylvia duran's name in oswald's address book. can we know what happens there? what's your conclusion when you think about mexico city? >> i'll tell you one bit of hope i have here is that there still may be questions to be answered in mexico city. there are people -- people alive to this day who seem to know much more about what oswald was doing in mexico city in the fall of 1963 than they ever shared with the united states government or that they were ever asked about at the time. a lot of people seemed to have been ignored by the fbi and cia in 1963 and 1964. they seem to be able to place oswald in the company of people who may have wanted to see president kennedy dead. who may have encouraged him to go back to texas and do what he did. i think the single most eye-popping document in all the work i did on this book, and it is found at the national archives, is a letter that was sent by fbi director jay edgar hoover to the warren commission in june 1964 in which he reveals, and i think he reveals very reluctantly, that the fbi had come across reliable informat

after much negotiation, it appears sylvia duran will come to washington, agree to be interviewed but that idea is vetoed by chief justice warren who refuses to allow her to be interviewed. apparently his words are, she's a communist and, again, his words, we don't talk to communists. so this vital witness is never questioned by the commission. i tracked her down in mexico last year. she continued to deny that she had any sort of relationship with oswald outside the four walls of the cuban consulate. i'll tell you, there's a lot of evidence to the contrary. >> why would the cubans want -- or some of them apparently want kennedy to be assassinated? >> this is the height of the cold war. this is a year -- president kennedy is killed a year after the cuban missile crisis. there was almost a nuclear war over cuba. the year before that there was the debacle at the bay of pigs where the kennedy administration and the cia attempted to overthrow castro. and we now know the kennedy administration was trying to kill castro. >> james p. hosty. what's the significance of that? >> james hosty is t