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

"At the same time I snapped the picture, I heard a sound. So then I had my picture taken, and I was not holding my camera in front of my face, and then I heard two more sounds which I thought were firecrackers."  Mary Moorman

You can see and hear her say that here:

https://www.youtube.com/watch?v=WgNF-sPW8YI

This was Part 2 of her interview with this guy from 2011, but in Part 1, which I also watched, the guy said at the beginning that 

"Mary Moorman took one of the most famous and important photos of the 20th century, which was this photo behind me, taken at the time of the fatal head shot to President John F. Kennedy."

So, he said that BEFORE he started interviewing her. But, when she told him that she took her picture and then heard two more shots, why didn't it register with him that she could not have taken it at the time of the fatal head shot? 

The fatal head was the last shot, and there isn't anyone alive or dead who disputes that. So, if she took her photo and then (with her camera no longer in front of her face) she heard two more shots, she must have taken it before the fatal head shot. Yet, the "Moorman photo" was definitely taken after the fatal head shot. 

And it means of course that she didn't take it. 

So, why didn't the guy realize it? Why didn't he stop and make the connection? It's because the idea that Mary Moorman took that photo is so ingrained in everyone's mind, including his. It is too ingrained in everyone's mind. It is part of the lore of the case, and it is so established in the collective mindset that people are mentally weighed down by it such that they can't get past it and see past it. As in this case, where Mary told him plainly that she heard two other shots after she took her picture, and he couldn't put 2 and 2 together.