Canada responds in minutes after the 9/11 attacks by issuing rapid instructions to aircraft already in flight, according to reporting that describes how air traffic control and government officials coordinated the emergency actions.
Officials had to notify roughly 270 planes to turn around and return across the Atlantic toward Europe. Other aircraft that could not be rerouted in time were directed to land quickly at available locations.
The sources frame the event around the narrow decision window faced by Canadian authorities, focusing on the scale and urgency of the instructions rather than on the specific origin or destination of each flight. While the outlets emphasize operational details—turning back a large subset of planes and landing the rest—they do not present differing conclusions about the overall approach.
