Flight departures began resuming early Wednesday across the United States after an overnight outage to a key air-traffic system prompted authorities to ground all planes nationwide.
The Federal Aviation Administration (FAA) said normal air traffic operations were gradually returning as it lifted the ground stop shortly before 9am Eastern time (9pm Thailand time). The disruption stemmed from problems with the Notice to Air Missions system, or Notam (also known as Notice to Airmen in some countries), which conveys advisory information essential for flight operations.
