Homeland Security Secretary Markwayne Mullin said there is currently no reason to suspect a national security threat was behind a communications outage that grounded all U.S. flights.
However, he said he would not rule out any cause for the outage, including a cyberattack.
“There is no indication that we have had, no reason to believe that at this point in time this was a threat to the United States,” Mullin told reporters at the White House, later repeating that there was “no indication at this time that this was a nefarious attack against us.”
“It was a telecommunications failure,” he said.
He said all flights were accounted for and air flights were handled “on a case-by-case basis.”
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