I suspect its all designed to keep ordinary folks on their toes and to keep the official terror narrative going, whilst the public ask awkward questions that don't have satisfactory answers. i.e. the engine core in this photo is a JT9D-7A/7F/F series - the only problem is that American Airlines Flight 175, which supposedly hit the WTC2 in 2001 was a Boeing 767-222ER which had JT9D-7R4 engines, which has a completely different design for the High pressure turbine Stage 1 cooling duct shown in the middle overlay photograph. I guess the FBI missed that one as the NTSB investigation whose first task in any aircraft crash/accident/foul play is to identify the aircraft involved and wasn't allowed to proceed.

http://ckpi.typepad.com/christopher_king/2009/09/murray-street-engine.html

Perhaps the tin foil hat will stop me thinking those thought crimes (or asking some online pertinent questions about mass murder terror crimes), which all conspiracy folks know are projected there by the flickering light bulbs of the new LED types. I think I've been listening to Jones for too long. That will be my defense at any trial assuming I get one.