When Air India Flight 171 fell from the sky just seconds after takeoff, killing all aboard and many on the ground, investigators were baffled. The Boeing 787 was mechanically sound. The weather posed no threat. The pilots were sober and experienced. So what went wrong?

In this episode of Miles to Go, veteran aviation journalist Miles O'Brien is joined by retired American Airlines captain Les Abend to dissect the deeply troubling conclusion: one of the flight crew members appears to have intentionally moved both engine fuel cutoff switches—a deliberate act of sabotage from the cockpit. Together, they explore how such tragedies violate aviation's sacred trust, why they are so difficult to foresee or prevent, and what this means for pilot mental health and airline safety culture going forward.