A communications outage has disrupted air traffic control centers across the country
The Federal Aviation Administration (FAA) has ordered a rare nationwide ground stop for all departing flights across the US, citing unspecified safety concerns.
The emergency directive took effect at 3:54 PM Eastern Time on Friday, with all departing aircraft instructed to remain on the ground until further notice.
According to the advisory, international flights arriving in the US were handled on a case-by-case basis. The ground stop was lifted around four and a half hours later, although flight disruptions continued.
Around 1,900 flights were canceled and…
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