As horrifying as the crash of Air India flight 171 was, investigators soon shocked the world again. They said the plane was likely intentionally crashed by a suicidal pilot, killing 260 people. How could this be? How could a pilot entrusted with hundreds of lives have evaded mental health screening meant to prevent such tragedies? In Episode 11 we look at the troubling history of intentional crashes by suicidal airline pilots. Such crashes are more numerous than we -- or the airlines -- would...