SYDNEY: A shortage of air traffic controllers caused flight cancellations and delays at Sydney Airport on Friday (Sep 11) morning, the federal agency responsible for managing Australia’s air traffic said, as probes continue into several recent near-misses at the airport.

Info courtesy of: 

https://www.channelnewsasia.com/world/australia-sydney-airport-disruption-air-traffic-controller-shortage-6377611

Follow the link for the full report.