Originally Posted by thesaints
So this person posed no threat to the safety of the aircraft, but was so dangerous for the US of A that they had to inconvenience some 300 other passengers.
He probably had some unpatriotic materiel in his luggage, like an "authentic" reproduction of the Constitution that he picked up while on a trip to Shanghai several months back. Some CIA flunky saw him buy it, took a quick snapshot of the transaction, and promptly had him added to the list.