>> one thing is this memo about how the fbi had information that there was an effort to kill oswald and who was worried about having this information after it happens. another is familiar to historians and people people who lived through the 70s all the different activities the cia was involved in, trying to kill castro, operations overseas, monitoring martin luther king as late as 1967. finally, the cliffhanger memo suggesting connections between the cia and oswald will be front and center. although it is an incomplete document, it doesn't prove anything. it will certainly lead to questions. >> it is a heck of a cliff hanger. this is richard helms, director of the cia in the '70s being questioned. the question is, is there any information that in any way shows lee harvey oswald was a