At 9:42 a.m., five minutes after the Pentagon attack, the FAA issued an unprecedented order: Every plane in the country must land immediately. Beyond the massive disruption in the airspace over the United States, more than a hundred transatlantic flights were diverted to small airports in Newfoundland, Nova Scotia, and elsewhere in Canada. Pilots, flight crews, and passengers all tried to understand what had happened in the United States, hungry for information wherever they could find it.

