From today's 'Independent':
The 'Rule of Two' (leading article, 28 March) used by some airlines to reduce the chances of an incident such as the Germanwings crash is not without its own dangers. A flight attendant in the flight deck with sinister motives could incapacitate the remaining pilot and take control of the door lock and then the aircraft.
It would be considerably easier for a terrorist organisation to infiltrate an airline crew with a flight attendant rather than with a pilot because pilots' histories are usually known in greater detail to their employers.
Overall, the 'lone pilot' option might be safer than 'pilot + non-pilot'.
Last edited by Discorde; 30th Mar 2015 at 13:31.