Aardwolfe:
Based on his military record at the time, he just made the grade in marksmanship. If I remember correctly they were using M1s which are semi-automatic.
The background data did not list Oswald as a hunter or gun enthusiest and you would have me believe that he could work a bolt action rifle of questionalble reliability and hit the targets each time? I've had bolt actions, pumps, lever actions, and semi-autos, and in my experience semi-autos are best for maintaining repeat target acquasition for follow up shots.
I couldn't buy it then, I don't buy it now.
Best of all, despite the integrity of the Secret Service, you think the route was chosen at random without concerns for security. The route you described so well was chosen for the express purpose of presenting an easy target, but the gunmen did not, in my opinion include Lee Harvey Oswald.
Unfortunately, we will never know because smart employers of paid asassins get rid of the loose ends quickly. I would guess that the actual trigger men didn't live to see the next day, and I would further guess that the men in contact with the trigger men were also dispatched soon thereafter.
That leaves us with no trail and a bunch of optimists who very dearly want to believe that the rich of their country do not really run it with murderous hands.
I still believe the Kennedy's, Dr. King, and a slew of less notable individuals were killed for economic considerations and not by "nut cases", although you could argue that those who value money and power more than human life are "nut cases".
Bountyhunter