Upon further analysis, I expect these photos are examples of "dry runs" conducted by the conspirators to test the efficacy of their plan. All good black ops/covert ops/terrorist plots involve significant amounts of training and resources, and a number of dry runs are conducted to test the targets defenses.
Given that the security around JFK was signifacantly lax, for a period spanning several years, including when he was campaigning (as the pictures I posted have conclusively proven), we can safely conclude that the conspiracy included members of the CIA, the Secret Service, state and local police, and texas oil tycoons/covert operatives (thanks for that piece of the puzzle, Lena!)
I also suspect that the conspiracy included national and regional media, both print and broadcast. Given the ample photographic evidence - some of these pictures are from Life magazine, for crying out loud - it is beyond belief that not one editorial, magazine article, or broadcast questioned the piss poor security around candidate, and later president, Kennedy. It would seem from the evidence that he was left at the mercy of the masses frequently and regularly, that this fact was captured by countless media outlets, and yet no one raised the alarm. So we have to assume that ABC, NBC, CBS, and all the major wire services, newspapers, and news magazines of the day were in on the plot. Even LIFE magazine.
So this vast, multi-year conspiracy involving hundreds, even thousands of CIA operatives, or people in their employ, find the perfect patsy (Oswald), to commit a horrible crime on that fateful day. Their influence is so wide reaching that they are able to change the planned route of the motorcade at the last minute! It was truly the most well organised, far reaching, and comprehensive assassination plot ever.
What troubles me, though, is that given the truly EPIC scale of this plot, and incalcuable resources brought to bear, how they could have made two simple mistakes:
1) why did they not sweep the ONE CITY BLOCK where the hit was to go down to make sure that their weren't any tourists with cameras (or, heaven forbid, super 8 cameras)? Cause I would think that people taking pictures of a presidential motorcade was pretty common, and a detail that a multi year conspiracy would not overlook.
and 2) why did they not tell the key players, like texas oil tycoon/operatives, that it would be a pretty dumb fucking idea to be there the day of the hit, and dumber still to get photographed.
I guess the devil is in the details....