Passengers place their lives in the hands of pilots on every flight. While pilots are highly trained to handle a wide variety of emergencies, it is often personal problems like impatience, arrogance, and incompetence that can lead to tragedy. Witness three air disasters caused by human flaws and tension in the cockpit, including the 1972 crash of a British Trident, a Minnesota commuter plane that slammed into a hillside, and a Colorado flight doomed by a hungover captain.