See also
https://www.cbc.ca/news/canada/montreal/montreal-airport-flight-delays-9.7421497
Montreal’s Trudeau airport warns all flights to and from U.S. suspended
See also
https://www.cbc.ca/news/canada/montreal/montreal-airport-flight-delays-9.7421497
Montreal’s Trudeau airport warns all flights to and from U.S. suspended
My first thought was ATC was still run by humans and they all used zoom for talking. Than I realized no auto pilot must be using Co-Pilot.