The Federal Aviation Administration’s unprecedented order to scale back flights nationwide because of the record-long government shutdown has taken effect, with some passengers trying to figure out backup travel plans.

Airlines scrambled to adjust their schedules and began canceling flights Thursday in anticipation of the FAA’s official order, while travelers with plans for the weekend and beyond waited nervously to learn if their flights would take off as scheduled.

Airlines also planned cancellations into the weekend, directing passengers to check apps to learn their flight status. The 40 airports selected by the FAA span more than two dozen states.

At Newark Liberty International Airport in New Jersey many flights were canceled, rescheduled or delayed, but most travelers found out about the changes before getting to the airport.

AP video shot by Ted Shaffrey