I say we make it a pressure chamber like divers have to use for the bends or real deep diving stuff. When one kills the other and feels all nice and
smug and happy with himself..whoever it would be...look him right in the eye through the glass, get a smile like the Cheshire cat then break open the
pressure release valve and walk away. The world might even invent a new medal just for the occasion. The 'Pop goes the weasel' award.
It would sure beat fighting across civilian populations and hurting more innocents then combatants in both directions.