a cia document revealed lee harvey oswald spoke in broken russian to a kgb agent in mexico city, less than two months before the assassination. but it may been only to get help with a passport or visa. another jfk file on oswald's proficiency in we rifle. it details a conversation between two cuban intelligence officers in 1967. one said, quote, oswald must have been a good shot. the other agent named abreu, he was quite good and asked how he knew this, he replied, i knew him. >> and the conspiracy angle is the cubans were behind oswald -- assassin ating a president. but it is much more likely that it is something more simple. someone boasting to another person. i knew him four years ago, this is four years after the assassination. >> reporter: it leaves us wanting more and fuels criticism. intelligence. analysts say some agencies are notorious for overclassifying. >> over you will find in a