There were some long delays at airport all across the US last week when the computer system used to check passengers against the federal terror watch list shut down for over an hour. International passengers travelling through DFW and other major airports were stuck in long lines as US Customs and Border Protection agents searched the terror watch list and checked travellers passports by hand.

The glitch affected the self-serve kiosks people coming into the United States can use to scan their passports. According to a statement from the Department of Homeland Security, there is no indication the system was hacked. According to officials, the system was back online after being down for almost 90 minutes.