[LibWhacker]

Plus, in addition to what some others have said, I'm pretty sure no single type of gas mask works for every chemical and biological agent. So "all" we'd have to do is hit 'em with a mix of gases.

[MJY1288]

Actually, a gas mask will not protect you against all types of gas, many of the forms of lethal gas is absorbed through the skin as well as the lungs. But when inhaled the potency is much greater, if you don't believe me...just ask X42 ;-)