US flights resume after 4-hour FAA outage; 'old hardware' blamed, not cyberattack

A four-hour grounding of US flights, the longest since 9/11, was caused by overloaded legacy hardware in air traffic control systems, per authorities, ruling out a cyberattack. Thousands of cancellations and delays ripple internationally, including a Dublin flight cancellation. The incident exposes fragility in critical aviation infrastructure and raises questions about modernization priorities.

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