I visited the sixth floor museum and stood at the window next to Oswald’s sniper’s perch (the actual perch is closed off with plexiglass)I have no rifle shooting skills at all but I think I could have picked off the man from there—looked to be incredibly easy shot.
The first time I visited the Texas Book Depository museum was within a few months of its opening. At that time Oswald's sniper's perch was simply cordoned off, the boxes arranged as they were the day of the shooting. My next visit was three or four years later and the plexiglass was in place. When the sniper's perch was cordoned off you got a better perspective of the shooting angle to the target as you could stand closer to the window.