John,
That's not a slap, it's the business!
They have a pre-printed reply now, it goes:
Dear Mr <x>,
We thank you for your interest in <x>.
We think you may be interested in <x> which covers in great detail your enquiry.
Yours - with a yawwwwwwwwnnnnnn - NTSB.
Ask them about their trajectory study, ask them why TWA fit rocket engines to certain parts of their aircraft.
Kidding of course, but they have a problem, and you are not helping them resolve it. I have a deal of respect for the NTSB, they reply even to foreign nationals, but they say what they said to you - get off our backs, read the report.
They know whatr they're doing, just as Ian knows what he's doing. (Ooops, that'll set him off again.

)
Stay with us John, the truth is out there. (But not yet!)
TJ