About Those Serial Numbers
One of the arguments that the Deniers like to use is that supposedly every single part of every single airplane has a serial number that identifies exactly which plane it came from. That is to say that that the planes uses for American Airlines Flight 11 and United Airlines Flight 175, while essentially identical, would have different serial numbers on each of their parts.
But here's an article from Australian which reveals that this is another one of the Deniers' myths.
An elderly man with a heart condition was shocked when a bolt from a Boeing jet flying overhead plunged through the roof of his Sydney home.
The Civil Aviation Safety Authority later confirmed the 10cm bolt came from a Boeing jet either landing or taking off from Sydney airport this morning.
CASA will now try to find out which aircraft the bolt fell from.
CASA officials obtained the serial number from the bolt once firemen arrived at the scene.
"It is an aircraft bolt manufactured in America," CASA spokesman Peter Gibson said.
"It is used on a number of different types of Boeing aircraft and used in a number of locations including the wing flaps.
"The next question is what plane does it come from and that's not quite as easy."
More discussion of the serial numbers at the JREF forums, where the Australian story was first pointed out to me.