Oswald in the doorway: the blog of the Oswald Innocence Campaign, by Ralph Cinque

On the left is the back of the freeway sign from the FBI reenactment. On the right is the back of it from the Zapruder film. On the left, the post seems to be cubical in shape, but on the right, it looks cylindrical to me. It doesn't have sharp, square edges like the other. Furthermore, the Zapruder post has two bolts going through it, but the post in the reenactment is clean. It has no visible fasteners. Frankly, I don't know how the sign is fastened to it. What explains these differences?