Why not arm them? After all we trust them with the controls of what has just been shown to be a very effective weapon.
If every cockpit contained a gun, then what happend the other day would not have come down the way it did (knives). You don't take a knife to a gunfight... Remember the scene in "Raiders of the Lost Ark?"
There is ammunition that reduces the risk of hull penetration. Even so, if a round were to pierce the pressure hull, that's why we have oxygen masks.
I for one am going to miss having my swiss army knife with me in my travels.
Boatman