James Woods and the 9/11 Dry Run
This is amazing. Read it all. Actor James Woods flew on a Boston to LA flight a month before 9/11. He told the crew that he was concerned that a group of 4 Middle Eastern men were acting strange and were going to hijack the plane. Nothing happened and no one thought anything of it afterwards.
Here's the kicker...
One of those men on that flight was Mohammed Atta.
Annie Jacobsen's entire Terror in the Skies series is must-read stuff.