CIVIC LANE Reuters reports that air traffic controllers involved in a near-miss between two Qantas aircraft at Sydney Airport had previously been identified as facing elevated fatigue risks. Aviation remains statistically highly safe, but near-miss incidents attract strong public attention because several safety systems must work together perfectly. Human fatigue is particularly controversial because it can affect pilots, controllers and maintenance crews. Technology can reduce some risks while creating new forms of dependency. This ranking question explores which part of the aviation safety chain passengers personally trust least.