The FBI has only released images from 2 CCTV cameras around the Pentagon, and they only released those after a huge public outcry. And none of the images they released shows an actual plane. Go and have a look at Part 4 of this series and you'll see no airplane in any of the images. Whatever hit the Pentagon, it couldn't have been a Boeing 757. If it was then the FBI would have been more than happy to show us the pics.