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

I think I figured out why the obelisk is tilted in the Altgens photo. They tilted it. Why? Because it makes the distance between the obelisk and the limo seem greater. 

They knew that the hit came lower on the hill than this. And they also had the unaltered photo, and they could see that JFK wasn't hit. So, by leaning it back, they made it seem farther away, suggesting that the limo was farther down the hill. Look how much difference it makes. 

Now, that obviously is not down by where the freeway sign is. It is much higher on the hill.