UPDATE: FAA lifts national ground stop

GRAND FORKS — Shortly before 8 p.m. Friday, the Federal Aviation Administration lifted a national ground stop, meaning air traffic across the country could resume. The ground stop, meaning planes in the air were allowed to land but no planes were allowed to take off, lasted about four hours. In Grand Forks, one Minneapolis-bound flight was prevented from departing. According to an evening ABC News report, federal government officials lifted the ground stop after diagnosing what Transportation Secretary Sean Duffy called "an 'inconsistency' in data from routers in the air traffic control system." Duffy described the nation's air traffic control system as "incredibly old" and "analog." "Our switches, our routers, actually got overloaded with data ... and started to give us inconsistency in the data from those routers. And because of that, we shut the system down," he told ABC News.

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