Originally Posted by
OOfff
Each layer of Swiss cheese should actually cover a hole not covered by other strategies. I’m not convinced secondary barriers do so in a post-9/11 world.
We're not going to be able to discuss that in great detail for SSI reasons, but personally I think it does address a weakness. And at a reasonable cost too. Who knows maybe they can save some money on some other part of the system once you have near-100% assurance that people in the cabin can't access the cockpit. Although I admit that's not how big government usually rolls.