Mullin 马林

Duffy attributed the failure to data overload in an outdated air traffic control system; Mullin said technical upgrades were underway, and US officials warned of possible similar incidents.

On November 13, the US Federal Aviation Administration issued a nationwide order halting flight departures, citing "special circumstances and safety reasons." US media reported that around 15,000 flights were canceled or delayed, affecting about 1.5 million people. The grounding order was lifted after more than four hours, but air traffic would still take several days to return to normal. US Transportation Secretary Duffy said on the evening of November 13 that the incident stemmed from the extremely outdated air traffic control system, whose switches and routers crashed due to data overload. US Homeland Security Secretary Mullin said that some technical upgrades to the relevant systems were underway when the incident occurred. US officials also said that more similar incidents could occur under current conditions.