Ignition Override you said "Once several have been executed (who were able to somehow survive the attacks from enraged passengers), there might be a bit of a deterrent effect". How do you provide a deterrent to individuals who are prepared to die for their radical ideas? We face here fanatics who have been brain washed and who actually think that they will become martyrs. The solution here as Boeing said can only be a conbination of strict security screening through an international dbase, sky marshals, as well as secure cockpit doors. Besides lets sit back and see how many actual cockpit doors will be left to secure, because right now it aint looking too good is it?