How rare is it for a prime minister to attract 4 floor-crossers in 4 months?

The voice of a New York air traffic controller repeatedly ordering a fire truck to stop, to no avail, will likely haunt Canadian air travellers for years to come. Both pilots were killed, and dozens of people were injured, last Sunday night when Air Canada Flight 8646 slammed into the truck as it crossed LaGuardia Airport’s Runway 4 eight seconds after landing. The deadly incident, now the subject of a probe by the National Transportation Safety Board (NTSB), has shone a light on the burden carried by air traffic controllers in this country and their mission to keep planes landing and...