US FAA grounds flights nationwide for second time since 9/11: What caused the disruption as 10,000 flights face delays?

US FAA grounds flights nationwide for second time since 9/11: What caused the disruption as 10,000 flights face delays?

The FAA grounded US flights nationwide after a telecommunications outage disrupted air traffic control centres. More than 10,000 delays were reported, with cancellations and diversions mounting. This was…