These photographs, which appear to show fragments from an aircraft inside the Pentagon, were published by Sarah Roberts in the article Photos Of Flt 77 Wreckage Inside The Pentagon
. Like all of the physical evidence of the Pentagon attack, these do little to resolve the question of exactly what crashed into the Pentagon. ( source (external - login to view)
These two photographs show the C-Ring punch-out hole, and several apparent pieces of aircraft debris outside the hole.
This photograph shows the remains of what is apparently a portion of the high pressure-compressor and shaft from a axialflow turbojet engine.
This photograph shows apparent aircraft debris: including pieces of aluminum joined together with rivets.
These two photographs show debris with decoration consistent with an American Airlines jetliner.
This photograph shows an apparent piece of aircraft debris with primer paint typical of the interior surfaces of aircraft.