Good posts all. I think the argument should be based on the fact that, should some terrorist/hijacker etc. take over a cockpit, gov't authorities may opt to have the plane shot down. I would much rather implement a system of last-ditch defense of the flight station, and that would of necessity involve weapons, and most importantly, the training to use them without mercy. No problem for me, but then again, I've used weapons against people I didn't even know. It's a matter of discipline. And speaking as an engineer (aero structures), fears of one or ten stray bullets causing a catastrophic hull failure are, frankly, silly. It is a matter of stringer support for skin structure, 8.6psi differential pressure, and the diameter of the hole(s), and is 'way beyond the scope of this thread. I personally think most opposition to pilot-guns is opposition to any-guns. think about the choice: some poor schmo in an F-16 having to knock down an unarmed air transport, or a few scary moments at 35K. OTOH, the weapons need to be tethered to the flight deck. Solves a lot of transport problems.