After 4 hours, US ends flight disruption
The US Secretary of Transportation stated that the outage occurred because 'switches and routers were overloaded with data and stopped working'.

TL;DR
- The FAA lifted a nationwide suspension on takeoffs after more than 4 hours.
- The outage was attributed to switches and routers being overloaded with data, causing them to fail.
- The Secretary of Transportation had previously requested $30.1 billion from Congress for air traffic control system modernization.
- This is the first nationwide suspension of takeoffs since January 11, 2023, which led to significant flight cancellations and delays.