MEHAU KULYK / SCIENCE PHOTO LIBRARY MEHAU KULYK / SCIENCE PHOTO LIBRARY
Chemical warfare. Conceptual computer artwork of a gas mask with a poison warning symbol (skull and crossbones) on the respirator (centre). This may represent the precautions taken to avoid being contaminated by biological or chemical warfare agents during a terrorist attack. In the left eye of the gas mask is a radiation warning symbol, which might represent hazard from a nuclear weapon, or alternativly the radiation that can be used to irradiate and kill some biological agents, for example anthrax.
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