A report reveals that a password issue delayed responses to a major air traffic control failure, grounding over 2,000 flights and affecting more than 700,000 passengers in August 2023. The incident, triggered by a flight from Los Angeles to Paris due to a duplicate airport code, left the engineer unable to log in from home, exacerbating delays. NATS is reviewing its protocols in light of the £75 million to £100 million losses incurred. Airline leaders criticized the organization for lack of preparedness and communication during the crisis.