But like most organizations, we had not conducted drills for a biological or chemical attack.

The unit is also trained to process a crime scene in a hazardous environment, for example following a nuclear, biological or chemical attack.

But is it possible to make modifications to an ordinary office building to protect against a biological or chemical attack?

A later amendment allowed exceptions in the case of nuclear, chemical or biological attacks.

Understand threat levels, learn how to minimise the risk, and what to do in a biological or chemical attack.

A second course on how to respond to biological and chemical attacks will begin in December, followed by more courses next year.

That example is reason enough for America not to rule out nuclear responses to biological or chemical attacks.

About a half-dozen villages in this area suffered chemical attacks.

However, the increased surface area makes them much more susceptible to chemical attack.

But the data could also be crucial in surveillance for biological or chemical attacks.