Identifying the A3 Skywarrior
Engine At the 9/11 Pentagon
By Jon Carlson
This photo of the Pentagon aircraft engine parts, a fan hub assembly, and just behind it a engine case, was the first clue of what really hit the Pentagon on 9/11. Measuring 35 inches it is half the size of the same part in the claimed Flight 77 Boeing 757 engine.
lots of pics
http://www.hoaxofthecentury.com/PentagonWrongEngine1.htm