Sorry elevator boy, that's your claim.What's even funnier is your claim, pig pie haq, that the alleged hijacked planes titanium engine parts turned to dust when the WTC towers exploded, so they could not be identified by serial numbers.
That was a whale of a whopper eh!
What's even funnier is
Jet Fuel hah ha ha ah ah
That's A Good One eh
I assume the blades were pretty smashed up though...and titanium isn't indestructible so what's your point?
Back in my 20's I worked on industrial turbos and many had either titanium or inconel blades...our welder usually had his hands full repairing them after a small piece if valve went through the turbo.
And you still haven't provided anything that says planes are required to be identified by serial numbers when they crash...and let's face it loser, 757's don't go missing very often.