Aviation expert reveals ‘critical mistake’ made before Air Canada crash at LaGuardia Airport

After the LaGuardia crash, investigators are reconstructing the final moments. The CRJ-900 had clearance and should have had a clear runway, but it collided with a Port Authority vehicle—killing both pilots and injuring many, in what families believe was preventable.

Former inspector general Mary Schiavo says it points to a breakdown in coordination between tower and ground control. As evidence is reviewed, one question remains: was a single mistaken clearance to blame?