All I've seen is a mountain of bullshit - maybe Perez should go skiing on it.
She knew their ultimate fate by phone call to her husband while on the plane. She was asking what they recommended they try to do. Then the plane hit the Pentagon.
I know of someone who was at Reagan Airport aboard a plane at the gate that morning. There must have been some head's up about it because they were ordered to disembark and head for the outside entrance. She said it was weird - she could hear on the walkie-talkies warning inbound. By the time she reached outside, it was deserted of cars and as she ran, the explosion from the Pentagon thrust her forward to the ground.
I've always wondered how they had so much time.