Security cameras don't tend to be aimed at the sky, and often use a low framerate, especially a decade and a half ago. The one "video" we do have was recorded at about one frame per second, and so is kind of lacking in detail.
What other cameras do you expect to have recorded video?
True, but this is the HQ of the most expensive, most technologically advanced military ever to exist.
>What other cameras do you expect to have recorded video?
Cameras every couple feet along the exterior of the pentagon. Cameras on every light pole in the lawn. Cameras on the fences. On buildings facing the pentagon. ...
There may even be a live satellite video of the event. Or surveillance planes monitoring the area.
In any case, you can get pretty close to the place without any special permission. Various public roads go right past it, and there's a busy Metro station and bus terminal right outside the front door. I've been past there a lot and don't recall ever seeing this hypothetical mass of cameras on it.
The idea that the Pentagon is super-important and therefore must have had a ton of high-quality cameras surrounding it is common, but appears to be based on no real-world evidence. If they were real, surely somebody would have posted a diagram and said, "this security camera, circled in red, should have captured video of AA77."
> There may even be a live satellite video of the event. Or surveillance planes monitoring the area.
This is absurd speculation. The US doesn't have live satellite coverage of the entire planet today, and certainly didn't in 2001. They wouldn't waste scarce resources surveilling the middle of a large American city. As for surveillance planes, people notice those when they're around, and as far as I know nobody has ever said they saw one on the morning of 9/11.
Nobody anticipated this kind of attack. You will find massive surveillance systems geared toward detecting attacks they did expect. There are gigantic radar installations and fleets of satellites whose sole purpose is to detect incoming nuclear missiles, for example. But nobody thought of watching for a rogue airliner.
Now that doesn't adequately explain why they don't go ahead and release it anyways, but it's still worth noting, imo.
All releasing the video would do would be attempt to quell the doubts of conspiracy theorists who would immediately claim it was a jet dressed up like a plane or CGI anyhow since they don't want the truth since the truth is generally mundane.
I get it, but is it really a national security secret that the pentagon is surrounded by cameras.