All US flights grounded by computer glitch

A computer glitch grounded all flights across the United States, affecting millions of flights.

The Federal Aviation Administration (FAA) has blamed the issue on a specific problem with the system that alerts pilots to potential hazards on flight routes.

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Normal air traffic operations are resuming gradually across the U.S. following an overnight outage to the Notice to Air Missions system that provides safety info to flight crews. The ground stop has been lifted.