There are obviously some risks here The biggest realized risk seems to have been Germanwings Flight 9525. A suicidal co-pilot waited until the Captain left the

There are obviously some risks here The biggest realized risk seems to have been Germanwings Flight 9525. A suicidal co-pilot waited until the Captain left the cockpit. Then he locked the door and flew the plane into the side of a mountain. https://en.wikipedia.org/wiki/Germanwings_Flight_9525 https://en.wikipedia.org/wiki/Germanwings_Flight_9525