Well, yesterday I would not have believed it possible, but it would appear that we have a suicide by the First Officer.
We will now be faced with the usual call for "something" to be done.
But what? Eventually this is a matter of trust which we have to have in people.
A train driver, bus driver, surgeon, ship captain, the list goes on forever of people who individually hold our lives in their hands.
Even with an extra member of staff on the flight deck an a/c can be crashed on purpose in moments.
Who is going to prevent me suddenly stamping sudden full rudder at m0.81?
Is a flight attendant going to stop me switching off the flight control computers and applying full forward side stick?
Of course, the answer is no,