The little-known defense giant does a lot of work for the Federal Aviation Administration and owns the equipment for the agency’s telecommunications network.

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With hundreds of planes out of position and crews out of hours, restarting the nation’s flight system is no easy task.

© Jason Fochtman/Houston Chronicle, via Associated Press

Transportation Secretary Sean Duffy said during the intermittent outage, controllers could still reach pilots.

© Alex Kent/The New York Times