Registered: 04/15/99
Posts: 12161
Loc: Los Angeles, CA, USA
I posted this somewhere else, and maybe this is the answer:
"My dad investigates aircraft engine failure and accidents. He says it is very possible for a plane to disintegrate like that and cause minimal damage to the Pentagon, when first impact was next to the Pentagon. The bigger question is why the plane made a huge effort to fly around the back of the Pentagon and hit the unpopulated section. Nothing conclusive, just very strange."