|Dallas Times Herald Collection/The Sixth Floor Museum at Dealey Plaza|
[Update: Someone asked: Why this picture? Part of it is because it was new to me - the PI was running the events of that day as a real time Twitter feed and this shot was taken shortly before the motorcade entered Dealey Plaza (I tracked down a better copy later, credited correctly). Part of it was because it seems so innocuous, so unsuspecting. And part of it because it sets the scene, and JFK does not dominate it.
Looking at the downtown Dallas of that day, the thing that most modern Americans would notice is that it is a security nightmare. Open windows, low buildings, fire escapes down the front of buildings, a large (but not huge) crowd of well-wishers. You see the security guys on the running board of the police car and on the back bumper of the limo alert, scanning the crowds.
The other thing I notice was about the car. It is what in those days would be considered a stretch limo in that it had three sets of seats. And that back set of seats, where the President and First Lady were sitting, were higher than the seats in front of them, to let the crowd get a better view. Look at the molding on the side - it rises after Mrs. Connally, and still Jackie is more exposed, higher up.
I mention this because the "smoking gun" of conspiracy theory is the so-called "magic-bullet". The bullet from Oswald's gun passed through the president, and into John Connolly, but the trajectory doesn't line up. This, of course, indicates there were other shooters, or multiple shooters, or the Comedian was on the Grassy Knoll. Unless of course, the President was sitting on a raised seat, which he was. Of course, the "magic-bullet" has worked its way into conspiratorial history, so this will rattle no true believers, but the evidence is there.]