I'm with the conspiracy theory - the archive film footage shows quite clearly that the President's head was hit with bullets from two directions, and proven marksman tests prove that it would be impossible to hit the President's cavalcade from the book depository, based on speed and distance. America has a history of not seeing what doen't suit it's image of itself - Viet Nam anyone? - so I believe that people know the truth, but we as the general public will never hear what that truth is.