A millisecond-long software glitch may have led to widespread disruption of air traffic in the United Kingdom in early September, when more than 2,000 flights were canceled or rescheduled, according to a report by the UK’s National Air Traffic Services (NATS). The incident occurred on September 8. A technical failure in the National Airspace System (NAS), which is responsible for air transportation in the United Kingdom, led to more than 2,000 flights being canceled, delayed, or diverted.