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The US Federal Aviation Administration (FAA) canceled a ground stop on all national flights hours after stopping departures at US airports on Friday. Over 3,500 flights were canceled and over 10,000 flights within, into, or out of the United States were delayed, according to the FlightAware aviation tracker. With some 11,000 flights scheduled to depart from US airports after 4 p.m. local time (2200 UTC), more cancellations were expected, according to Cirium, an aviation analytics company. "All departing traffic should remain groundstopped until further notice," the FAA said. The agency said the ground stop is "due to extraordinary circumstances and reasons for safety.
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