De twee luchtverkeersleiders hadden volgens Amerikaanse functionarissen op het moment van het ongeluk dienst moeten hebben, maar waren al vertrokken.

The March 22 collision between an Air Canada plane carrying 72 passengers and four crew and a fire truck on killed two pilots and seriously injured six others.

The two air-traffic controllers were determined to have left their shifts early before an Air Canada Express plane collided with a fire truck at New York’s LaGuardia Airport in…