KING: That was the plane that slammed the Pentagon. Then, a report of a plane over Pennsylvania headed for Washington. Twice, a military aide asks the vice president for authority to shoot it down.
JOSH BOLTEN, DEPUTY WHITE HOUSE CHIEF OF STAFF: The vice president said, yes, again. And the aide then asked a third time. He said, "just confirming, sir, authority to engage." And the vice president, his voice got a little annoyed then, said, "I said yes."