Even if it is Caylee and she has her hand on the door handle without a video of her actually opening the sliding glass door this only proves that she was able to reach the door handle. Also, how old was she suppose to be in the picture? Most young children expect doors to open in and out and unless she has had a lot of practice a 2 year old isn't going to be able to understand pulling a door sideways. Also, need to know what type of door it is. I have a sliding glass door that I can barely open-I know a child would never be able to pull it back. I do think she has her hand on the handle and it does look like she is trying to push the door sideways, however, opening a sliding glass door requires more coordination they pulling or pushing a door open. She may have been able to slide the door a little but her height and body positioning at the door is going to make it difficult for her to slide it away from her more than a few inches. She would then have to change her hand position and her body position to open it wide enough for her to go through unless this is a very light and easily to slide door. This takes some problem solving and motor coordination that most 2 year olds don't typically have. I'm not saying she couldn't have opened it but it would have required her to have repeatedly tried and practiced. I am assuming that Cindy and George at least would have gotten on her anytime they saw her trying to slide the door so I'm not sure when she would have had the opportunity to practice sliding the door. Also her arm and hand position would be more correct for a child trying to push a door open. All toddler's are going to try and open doors-it is something they do-but just because they can open a door. Having their hand on a door doesn't mean that they can open it enough to go out. I am sure many people have pictures of their 2 year old child standing at doors but that doesn't mean they were ever able to get the door open all the way. A child under 3 years is going to have a harder time. A 3 or 4 year old shouldn't have too much trouble with a sliding glass door but it depends on the door, how well it is mounted, greased, and how well it fits in the frame. That picture really tells us nothing.