his assassination. we're also joined by "time" magazine's managing editor right now, nancy gibb, also with us larry sabado, a political analyst and scholar, author of "the kennedy half century." >> thanks to both of you coming in. you can't completely rule out this notion of a conspiracy, can you? >> not totally. i have to be honest, wolf, when i started this project side of inclined more towards conspiracy, and the more i researched it, the more i realized it was lee harvey oswalt who was in the -- however, we can never know for sure whether he was encouraged