The video frames seen here were released in 2006 in response to a FOIA request for surveillance camera videos at or near the Pentagon on 9/11. We obtained these images from the 911datasets.com project through the 911encyclopedia.com website, which also documents the source FOIA.
Many people viewing these as still frames over the years (ourselves included) failed to see the plane. Initially only the video frames taken by the camera behind the foreground obstruction were released. People found it hard to believe that a small foreground obstruction could hide a Boeing 757. The lack of a visual image of the plane led to speculation that there was instead a small plane or a missile, and opened the door to speculation that there was no plane at all. The second video without the foreground obstruction was released much later, and by then no-plane speculation was well established in the 9/11 Truth movement.
This is a zoomed-in detail of the view from what we shall call Camera 1.
The view from Camera 2 shows the plane a fraction of a second earlier. Since the plane is approaching us as it moves to the left, and since all of these images have barrel distortion, the image of the plane is smaller than the Camera 1 image.
This view does a blink comparison between the frames from Camera 1 and Camera 2 that contain the plane. The motion of the plane between these two views is apparent, and the motion toward the cameras is apparent in the changing size of the plane.
This view blinks the full image from Camera 1.
This view blinks the full image from Camera 2.
Except for the white smoke trail, the plane is not seen clearly in a still image due primarily to three factors:
1 – The low contrast between the backlit plane and the background.
2 – The extreme wide angle lens and low resolution of the video camera/recorder.
3 – Some blurring due to the motion of the fast moving plane.
Blink comparators are commonly used to detect subtle differences in astronomical photographs to be able to find variable stars, movements of asteroids, etc. Blinking the frames allows the eye to more easily discern the plane in contrast with the fixed background.