US airspace reopens after major disruption as officials rule out cyberattack

A sweeping nationwide aviation disruption brought air travel across the United States to a standstill on Friday, after a telecommunications failure across regional air traffic control centers forced the Federal Aviation Administration (FAA) to issue a rare ground stop, halting all departing flights.

The ground stop, the first nationwide halt of its kind since January 2023, remained in effect for more than four hours before airspace reopened at 8:15 p.m. Eastern time, leaving more than 10,000 flights delayed and over 4,000 canceled as airlines worked to clear mounting passenger backlogs.

Following the shutdown, U.S. federal officials detailed the technical breakdown behind the crisis, attributing the failure to aging infrastructure while noting there is currently no evidence of a cyberattack.

What technical failure forced the FAA to halt air traffic nationwide?

Speaking during a White House press conference, U.S. Transportation Secretary Sean Duffy walked reporters through the sequence of events that compelled the FAA to pause air traffic across all 22 Air Route Traffic Control Centers.

Duffy blamed the operational failure directly on outdated federal aviation equipment—specifically analog switches and routers that became overloaded with data and began transmitting inconsistent information while more than 3,500 aircraft were airborne. "What we have is an incredibly old air traffic control system," Duffy told reporters, adding that pilots and air traffic controllers followed emergency protocols to land airborne flights safely.

According to the press briefing, Duffy used the incident to renew the White House's push for emergency legislative funding on Capitol Hill, calling on lawmakers to approve $50 billion for a comprehensive infrastructure overhaul.

"The President, for the last year, has been asking Congress to FULLY FUND a full build of a brand new air traffic control system!" Duffy said during the briefing.

Have investigators detected any signs of a cyberattack?

Addressing national security concerns surrounding the sudden halt in air traffic, Department of Homeland Security (DHS) Secretary Markwayne Mullin stated at the press conference that federal investigators have not detected signs of malicious digital interference, though officials remain cautious.

"There is nothing that indicates a cyberattack as of right now, but we are not ready to completely rule it out," Mullin said, as per video from the briefing shared by the White House.

also clarified that the aviation outage was unrelated to a separate global Microsoft disruption earlier in the day and assured the public that all airborne flights were safely accounted for.

Why are federal officials warning that legacy aviation systems pose a security risk?

Echoing the Transportation Department's call for urgent infrastructure upgrades, the DHS chief emphasized that the vulnerabilities exposed by the ground stop underscore a pressing legislative priority.

"This underscores the need for Congress to fund the modernization of these ancient systems," Mullin added during the press conference, warning that decades-old telecommunications architecture represents an acute operational and national security vulnerability.