[3catsanadog]

I think the wife of one of the family members said they waited because they were over a populated area and they waited until they were over the unpopulated fields of PA before they took action

From what I saw on the news accounts of the flight the plane flew north of Pittsburgh.

[CyberAnt]

I don't have any idea what they flew over - I just remember it was one of the family members who made that comment during an interview - evidently her family member told her that was what they were waiting for.