US authorities have not ruled out a cyber-attack or artificial intelligence (AI) intervention as possible causes of a large-scale failure of the air traffic control system, US Homeland Security Secretary Marquin Mullin said in response to a reporter's question.
"We're continuing to review, so we're not going to rule out that possibility," Mullin said.
According to the minister, the authorities have not yet found signs of a cyber attack. He clarified that no one took responsibility for the possible intervention, and no traces of intrusion into the systems were found.