What are the odds of just one flight recorder being recovered from a total of eight from four different planes crashing on land?
76. In accordance with FAA regulations, United 93’s cockpit voice recorder recorded the last 31 minutes of sounds from the cockpit via microphones in the pilots’ headsets, as well as in the overhead panel of the flight deck.
This is the only recorder from the four hijacked airplanes to survive the impact and ensuing fire.The CVRs and FDRs from American 11 and United 175 were not found,and the CVR from American Flight 77 was badly burned and not recoverable.
http://www.gpoaccess.gov/911/pdf/fullreport.pdf
Here's a list of every instance of non-recovery in the history of aviation, including the two planes at the WTC. Almost all of them are in extremely deep ocean.
http://en.wikipedia.org/wiki/List_of_unrecovered_flight_recorders
Excluding 9/11, the chances of a plane crashing on land and its recorders not being recovered are 100s to 1. For this to happen several times on the same day in non-remote parts of the US I reckon we are talking about 100s of thousands to 1. Even if you take the position that the fires at the WTC destroyed those boxes completely leaving no remains (which is almost impossible given the construction of these things) there is still the matter of the two boxes at the Pentagon being unreadable.
Without making any reference to conspiracy theories, the only logical coclusion one can draw from that part of the official report is that it's total bollocks.