I read:
Anderson, who resumed the running of the Conch Republic souvenir business and the official Conch Republic Days festival until his death in 2014, was subjected to an FBI inquiry after reports surfaced that one of the 9/11 hijackers, Mohammad Atta, might have used a Conch Republic passport to enter the United States.
The Conch Republic is a "tongue-in-cheek" micronation in Florida.
Did one of the 9/11 hijackers use a Conch Republic passport to enter the United States?