US Air Travel Chaos Explained: What Triggered The Nationwide Ground Stop?

For several hours, air travel across the United States came to a standstill after the FAA issued a rare nationwide ground stop, disrupting thousands of flights and leaving passengers stranded at airports across the country. But what exactly happened? Officials say the crisis was triggered by failures in aging air traffic communications systems, including decades-old telecommunications infrastructure, routers, switches and copper networks that help manage aircraft movement across America. Authorities have ruled out a cyberattack, ruled out any connection to the global Microsoft outage, and stressed that there was no security threat. Here's everything you need to know about the aviation outage that exposed weaknesses in one of the world's busiest air traffic networks. 

For several hours, air travel across the United States came to a standstill after the FAA issued a rare nationwide ground stop, disrupting thousands of flights and leaving passengers stranded at airports across the country. But what exactly happened? Officials say the crisis was triggered by failures in aging air traffic communications systems, including decades-old telecommunications infrastructure, routers, switches and copper networks that help manage aircraft movement across America. Authorities have ruled out a cyberattack, ruled out any connection to the global Microsoft outage, and stressed that there was no security threat. Here's everything you need to know about the aviation outage that exposed weaknesses in one of the world's busiest air traffic networks.