The United States on Friday lifted an hours-long ground stop at the nation's airports, with top officials explaining that the disruption was not due to a cyberattack or a sweeping Microsoft outage.
Transportation Secretary Sean Duffy said that US airspace was now "opened up," and blamed "old hardware" for the travel chaos. Homeland Security Secretary Markwayne Mullin told reporters there was "no cyberattack" and "no connection between this and Microsoft."