Chemical Weapons  Chemical Weapons  Chemical weapons use the
toxic properties of chemical substances  to produce physical or
physiological effects. Thus any  chemical used in warfare is
called a Chemical Weapon Agent (CWA)  These chemicals could come
in liquid, gas or solid form and blister.  The different types
of chemical weapons are  classified according to their effect on
the organism (lethal and incapacitating categories). These types
are:    • Nerve Agents   • Mustard Agents   • Hydrogen Cyanide
• Tear Gases   • Arsines   • Psychotomimetic Agents   • Toxins
• Potential CW Agents.   The origins of the studies and lore of
chemical weapons began in World War I when an aerosol was used
during the battles. Given the more frequent use that these
weapons began to have in 1925 the Geneva Protocol was signed
prohibiting use of chemical weapons in warfare  Chemical weapons
also were employed in the intervening period by Italy (in
Ethiopia) and Japan (in Manchuria and China). Both nations were
signatories to t