The UK says a bug caused its air traffic system to confuse two checkpoints 4,000 nautical miles apart, leading to a huge outage, and plans to review the issue (Kate Duffy/Bloomberg)

Kate Duffy / Bloomberg:
The UK says a bug caused its air traffic system to confuse two checkpoints 4,000 nautical miles apart, leading to a huge outage, and plans to review the issue  —  - Checkpoints 4,000 miles apart had duplicate identifiers  — System update in the works, NATS says after day of disruption