Two pilots died after an Air Canada regional jet collided with a fire truck while landing at LaGuardia Airport on March 23.Flight attendant Solange Tremblay survived the impact after being ejected from the aircraft during the crash that destroyed the jet nose.The emergency vehicle was responding to a separate United Airlines incident when it crossed the path of the incoming flight.Federal investigators are now analyzing whether air traffic controller fatigue or staffing shortages contributed to the fatal accident.