Members of air crews from three unidentified countries have turned up among the tiny minority of extremists in terrorist databases. From CNN, with thanks to US Action:
Nine of the 12 had associated with terrorists or supported terrorist organizations, two were using fraudulent passports and one had a criminal record for assaulting a U.S. law enforcement officer, according to Department of Homeland Security Undersecretary for Border and Transportation Asa Hutchinson. …
Hutchinson said a similar check of 2.7 million truck drivers who were licensed to carry hazardous materials in the United States has not turned up anyone with clearly established ties to terrorism, but he said 29 “potential persons of interest” are undergoing additional checks by law enforcement.
One of the 29 has already been expelled from the U.S. for unrelated reasons.