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In reply to the discussion: New NSA docs contradict 9/11 claims [View all]ehrnst
(32,640 posts)DNA could survive an explosion, as lightweight fragments of bone, skin get blown away from the point of impact, and subsequent fireball.
There was DNA collected from the tops of buildings around the WTC.
The majority of the plane bodies in the WTC were consumed in the building collapse. However there are fragments of plane all over the place around the Pentagon, Jet engines landed on the street in NYC.
In the Pentagon, the plane hit the pavement first, then entered the building penetrating 3 of the rings - and causing damage to all 5. The roof over the plane held for about 35 minutes, thanks to the then recent reinforcements to that side of the building. This saved many lives due to evacuation. Then the roof collapsed and several stories of flaming debris and reinforced concrete caved in on the what was left of the burning wreckage.
Some small personal effects - and DNA - of passengers were found strewn away from area of the crash (some found by my friend), likely due to the blast on impact.