I've stood on the sidewalk right underneath the window of that book depository in Dallas, and looked out across Dealey Plaza. A couple observations I noticed: The area is a lot smaller than it looked on television. You could almost hit a passing car at that range with a rock and from the sixth floor, even an occupant would be an easy shot to a 1960's era trained Marine, as Oswald was. They generally trained with bolt-action rifles, and it would be no great feat to get off 5 or 6 rounds at a passing target.
The thing that puzzles me, is why the utter piece of crap 6.5mm scoped Italian Carcano that he paid $19.95 for for?
For only twice the amount, he could have bought a scoped U.S. Model 1917 rifle in 30-06, which is a far more accurate rifle. Or even a scoped British .303 Enfield for the same price, which has far better ballistics than the Carcano...
Another observation I got was the creepy way that sounds echo around that place. It probably has something to do with the way the buildings are laid out, but sounds coming from one location seem to sound like they're coming from another area. It's quite a moving experience to stand underneath that window and for some reason, my eyes got a little misty.
And then there was Oswald's shooting in the Dallas PD basement. I own the same model pistol Jack Ruby used, a Colt Cobra in .38 Special. Not a particularly powerful pistol, and it has a 2" barrel. One only wonders that given the advances we've had in battlefield medicine over the last couple decades, Oswald might have survived the shooting and we'd probably know more about what the hell happened there.