1997 A Comair Embraer 120 Brasilia crashed while on approach to Detroit Metropolitan Airport. The crew was instructed to slow to 170 knots by Air Traffic Control and complied. This speed was below the stall speed of the aircraft in icing conditions, and the plane entered a spin and impacted the ground. All 29 on board were killed.
The unions are great for representing you in contract negotiations but if the laws regulating your industry are hostile to labor, the unions are limited on what they can achieve.