reflect the health risk to humans. There are no documented instances of fatalities from smoke inhalation alone under combat conditions. International law While in general white phosphorus is an industrial chemical not subject to restriction, certain uses in weaponry are banned or restricted by general international laws: in particular, those related to incendiary devices. Article 1 of Protocol III of the Convention on Certain Conventional Weapons defines an incendiary weapon as "any weapon or munition which is primarily designed to set fire to objects or to cause burn injury to persons through the action of flame, heat, or combination thereof, produced by a chemical reaction of a substance delivered on the target". Article 2 of the same protocol prohibits the deliberate use of incendiary weapons against civilian targets (already forbidden by the Geneva Conventions), the use of air-delivered incendiary weapons against military targets in civilian areas, and the general use of other types of incendiary weapons against military targets located within "concentrations of civilians" without taking all possible means to minimise casualties. The convention also exempts certain categories of munitions from its definition of incendiary weapons: specifically, these are munitions which "may have incidental incendiary effects, such as illuminants, tracers, smoke or signalling systems" and those "designed to combine penetration, blast or fragmentation effects with an additional incendiary effect." The use of incendiary and other flame weapons against matériel, including enemy military personnel, is not directly forbidden by any treaty. The United States Military mandates that incendiary weapons, where deployed, not be used "in such a way as to cause unnecessary suffering." The term "unnecessary suffering" is defined through use of a proportionality test, comparing the anticipated military advantage of the weapon's use to the amount of suffering potentially caused. The Chemical Weapons Convention, sometimes invoked in discussions of WP usage, is meant to prohibit weapons that are "dependent on the use of the toxic properties of chemicals as a method of warfare" (Article II, Definitions, 9, "Purposes not Prohibited" c.). The convention defines a "toxic chemical" as a substance "which through its chemical action on life processes can cause death, temporary incapacitation or permanent harm to humans or animals" (CWC, II). An annex lists chemicals that are restricted under the convention, and WP is not listed in the Schedules of chemical weapons or precursors. In a 2005 interview with RAI, Peter Kaiser, spokesman for the Organisation for the Prohibition