New York ¨C The U.S. grounded all flights for several hours Friday, sparking travel chaos across the vast country, after what government officials said was a major communications outage caused by decades-old technology.
The nationwide stop left hundreds of thousands of passengers in limbo, with some pulled off planes moments before departure by airline staff who appeared in the dark about unfolding events.
The incident marked only the second time such an alert had been issued in U.S. airspace since the 9/11 attacks.
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