The absence of photos or other public evidence of recognizable remains
of Flight 77 is evidence of criminality no matter what the fate of Flight 77.
It means either
that government officials have been highly effective
at hiding or destroying that evidence,
or that that evidence was never at the Pentagon crash site
because something other than Flight 77 crashed at the Pentagon.
The talk is suggesting the second possibility.
It is possible, however, to reconcile the first possibility
with the seemingly contradictory near-absence of documented aircraft debris.
Consider the fates of the different parts of the jetliner.
Given the shape of the punctures to the building the vast majority
of the mass of a 757 could have entered the building,
leaving only the outer 30 feet of each wing
and vertical tail-section outside.
These pieces would only weigh a few tons,
and if shredded,
as happened to the entire plane in the F-4 crash study cited on the following page,
could be reduced to confetti
less than twenty cubic feet in volume.
That could easily be the debris we see in the photographs
taken by passers-by outside the building.
The remains of the jetliner inside the building came under
the control of FEMA, which was not interested in documenting the site,
and, as at Ground Zero, used off-site, volunteer investigators.
The lack of a photographic record of pieces of Flight 77 inside
the building may reflect the way FEMA ran the clean-up operation.