US ground stop linked to copper‑wire upgrade disrupts thousands of flights
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A nationwide ground stop on Friday led to more than 3,500 flight cancellations. Transport Secretary Sean Duffy stated the disruption was caused by a copper-wire upgrade. This update flooded air-traffic control systems.
Transport Secretary Sean Duffy said a nationwide ground stop on Friday was triggered by a copper‑wire upgrade that flooded air‑traffic control systems, leading to over 3,500 cancellations.